cic-stack/apps/cic-eth/tests/testdata/bancor/ERC20Token.json

{
  "contractName": "ERC20Token",
  "abi": [
    {
      "inputs": [
        {
          "internalType": "string",
          "name": "_name",
          "type": "string"
        },
        {
          "internalType": "string",
          "name": "_symbol",
          "type": "string"
        },
        {
          "internalType": "uint8",
          "name": "_decimals",
          "type": "uint8"
        },
        {
          "internalType": "uint256",
          "name": "_totalSupply",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "_owner",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "_spender",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "Approval",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "_from",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "_to",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "name": "allowance",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "name": "balanceOf",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "decimals",
      "outputs": [
        {
          "internalType": "uint8",
          "name": "",
          "type": "uint8"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "name",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "symbol",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "totalSupply",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "transfer",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "_to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "transferFrom",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_spender",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "approve",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ],
  "metadata": "{\"compiler\":{\"version\":\"0.6.12+commit.27d51765\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"string\",\"name\":\"_name\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"_symbol\",\"type\":\"string\"},{\"internalType\":\"uint8\",\"name\":\"_decimals\",\"type\":\"uint8\"},{\"internalType\":\"uint256\",\"name\":\"_totalSupply\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"ERC20 Standard Token implementation\",\"events\":{\"Approval(address,address,uint256)\":{\"details\":\"triggered when a wallet allows another wallet to transfer tokens from on its behalf\",\"params\":{\"_owner\":\"wallet that approves the allowance\",\"_spender\":\"wallet that receives the allowance\",\"_value\":\"allowance amount\"}},\"Transfer(address,address,uint256)\":{\"details\":\"triggered when tokens are transferred between wallets\",\"params\":{\"_from\":\"source address\",\"_to\":\"target address\",\"_value\":\"transfer amount\"}}},\"kind\":\"dev\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"allows another account/contract to transfers tokens on behalf of the cal
  "bytecode": "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
  "deployedBytecode": "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",
  "immutableReferences": {},
  "sourceMap": "241:4565:48:-:0;;;1577:434;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;1577:434:48;;;;;;;;;;-1:-1:-1;1577:434:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;1577:434:48;;;;;;;;;;-1:-1:-1;1577:434:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;1577:434:48;;;;;;;;;;;1725:19;;1577:434;;-1:-1:-1;1577:434:48;-1:-1:-1;1717:52:48;;;;;-1:-1:-1;;;1717:52:48;;;;;;;;;;;;-1:-1:-1;;;1717:52:48;;;;;;;;;;;;;;;1812:1;1794:7;1788:21;:25;1780:56;;;;;-1:-1:-1;;;1780:56:48;;;;;;;;;;;;-1:-1:-1;;;1780:56:48;;;;;;;;;;;;;;;1849:12;;;;:4;;:12;;;;;:::i;:::-;-1:-1:-1;1872:16:48;;;;:6;;:16;;;;;:::i;:::-;-1:-1:-1;1899:8:48;:20;;-1:-1:-1;;1899:20:48;;;;;;;;;;;;;1930:11;:26;;;1977:10;-1:-1:-1;1967:21:48;;;:9;:21;;;;;:36;-1:-1:-1;241:4565:48;;-1:-1:-1;241:4565:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;241:4565:48;;;-1:-1:-1;241:4565:48;:::i;:::-;;;:::o;:::-;;;;;;;;;;;;;;;;;;;;;;",
  "deployedSourceMap": "241:4565:48:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;327:27;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;4284:519;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;4284:519:48;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;434:35;;;:::i;:::-;;;;;;;;;;;;;;;;3099:470;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;3099:470:48;;;;;;;;;;;;;;;;;:::i;397:30::-;;;:::i;:::-;;;;;;;;;;;;;;;;;;;476:54;;;;;;;;;;;;;;;;-1:-1:-1;476:54:48;-1:-1:-1;;;;;476:54:48;;:::i;361:29::-;;;:::i;2343:355::-;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;2343:355:48;;;;;;;;:::i;537:75::-;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;537:75:48;;;;;;;;;;:::i;327:27::-;;;;;;;;;;;;;;;-1:-1:-1;;327:27:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::o;4284:519::-;4436:4;4408:8;594:23:65;608:8;594:13;:23::i;:::-;4592:11:48;;;:51:::1;;-1:-1:-1::0;4617:10:48::1;4607:21;::::0;;;:9:::1;:21;::::0;;;;;;;-1:-1:-1;;;;;4607:31:48;::::1;::::0;;;;;;;;:36;4592:51:::1;4584:82;;;::::0;;-1:-1:-1;;;4584:82:48;;::::1;;::::0;::::1;::::0;::::1;::::0;;;;-1:-1:-1;;;4584:82:48;;;;;;;;;;;;;::::1;;4689:10;4679:21;::::0;;;:9:::1;:21;::::0;;;;;;;-1:-1:-1;;;;;4679:31:48;::::1;::::0;;;;;;;;;;:40;;;4735:38;;;;;;;4679:31;;4689:10;4735:38:::1;::::0;;;;;;;;;::::1;-1:-1:-1::0;4791:4:48::1;::::0;4284:519;-1:-1:-1;;;4284:519:48:o;434:35::-;;;;:::o;3099:470::-;3290:4;3238:5;594:23:65;608:8;594:13;:23::i;:::-;3267:3:48::1;594:23:65;608:8;594:13;:23::i;:::-;-1:-1:-1::0;;;;;3343:16:48;::::2;;::::0;;;:9:::2;:16;::::0;;;;;;;3360:10:::2;3343:28:::0;;;;;;;;:40:::2;::::0;3376:6;3343:32:::2;:40::i;:::-;-1:-1:-1::0;;;;;3312:16:48;::::2;;::::0;;;:9:::2;:16;::::0;;;;;;;3329:10:::2;3312:28:::0;;;;;;;:71;;;;3413:16;;;:9:::2;:16:::0;;;;;:28:::2;::::0;3434:6;3413:20:::2;:28::i;:::-;-1:-1:-1::0;;;;;3394:16:48;;::::2;;::::0;;;:9:::2;:16;::::0;;;;;:47;;;;3469:14;;::::2;::::0;;;;:26:::2;::::0;3488:6;3469:18:::2;:26::i;:::-;-1:-1:-1::0;;;;;3452:14:48;;::::2;;::::0;;;:9:::2;:14;::::0;;;;;;;;:43;;;;3511:28;;;;;;;3452:14;;3511:28;;::::2;::::0;::::2;::::0;;;;;;;::::2;-1:-1:-1::0;3557:4:48::2;::::0;3099:470;-1:-1:-1;;;;;3099:470:48:o;397:30::-;;;;;;:::o;476:54::-;;;;;;;;;;;;;:::o;361:29::-;;;;;;;;;;;;;;;-1:-1:-1;;361:29:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;2343:355;2486:4;2463:3;594:23:65;608:8;594:13;:23::i;:::-;2542:10:48::1;2532:21;::::0;;;:9:::1;:21;::::0;;;;;:33:::1;::::0;2558:6;2532:25:::1;:33::i;:::-;2518:10;2508:21;::::0;;;:9:::1;:21;::::0;;;;;:57;;;;-1:-1:-1;;;;;2593:14:48;::::1;::::0;;;;:26:::1;::::0;2612:6;2593:18:::1;:26::i;:::-;-1:-1:-1::0;;;;;2576:14:48;::::1;;::::0;;;:9:::1;:14;::::0;;;;;;;;:43;;;;2635:33;;;;;;;2576:14;;2644:10:::1;::::0;2635:33:::1;::::0;;;;;;;;::::1;-1:-1:-1::0;2686:4:48::1;::::0;2343:355;-1:-1:-1;;;2343:355:48:o;537:75::-;;;;;;;;;;;;;;;;;;;;;;;;:::o;692:128:65:-;-1:-1:-1;;;;;766:22:65;;758:54;;;;;-1:-1:-1;;;758:54:65;;;;;;;;;;;;-1:-1:-1;;;758:54:65;;;;;;;;;;;;;;;692:128;:::o;778:147:61:-;838:7;872:2;866;:8;;858:34;;;;;-1:-1:-1;;;858:34:61;;;;;;;;;;;;-1:-1:-1;;;858:34:61;;;;;;;;;;;;;;;-1:-1:-1;910:7:61;;;778:147::o;386:169::-;446:7;478;;;504;;;;496:32;;;;;-1:-1:-1;;;496:32:61;;;;;;;;;;;;-1:-1:-1;;;496:32:61;;;;;;;;;;;;;;;546:1;386:169;-1:-1:-1;;;386:169:61:o",
  "source": "// SPDX-License-Identifier: SEE LICENSE IN LICENSE\r\npragma solidity 0.6.12;\r\nimport \"./interfaces/IERC20Token.sol\";\r\nimport \"../utility/Utils.sol\";\r\nimport \"../utility/SafeMath.sol\";\r\n\r\n/**\r\n  * @dev ERC20 Standard Token implementation\r\n*/\r\ncontract ERC20Token is IERC20Token, Utils {\r\n    using SafeMath for uint256;\r\n\r\n\r\n    string public override name;\r\n    string public override symbol;\r\n    uint8 public override decimals;\r\n    uint256 public override totalSupply;\r\n    mapping (address => uint256) public override balanceOf;\r\n    mapping (address => mapping (address => uint256)) public override allowance;\r\n\r\n    /**\r\n      * @dev triggered when tokens are transferred between wallets\r\n      *\r\n      * @param _from    source address\r\n      * @param _to      target address\r\n      * @param _value   transfer amount\r\n    */\r\n    event Transfer(address indexed _from, address indexed _to, uint256 _value);\r\n\r\n    /**\r\n      * @dev triggered when a wallet allows another wallet to transfer tokens from on its behalf\r\n      *\r\n      * @param _owner   wallet that approves the allowance\r\n      * @param _spender wallet that receives the allowance\r\n      * @param _value   allowance amount\r\n    */\r\n    event Approval(address indexed _owner, address indexed _spender, uint256 _value);\r\n\r\n    /**\r\n      * @dev initializes a new ERC20Token instance\r\n      *\r\n      * @param _name        token name\r\n      * @param _symbol      token symbol\r\n      * @param _decimals    decimal points, for display purposes\r\n      * @param _totalSupply total supply of token units\r\n    */\r\n    constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _totalSupply) public {\r\n        // validate input\r\n        require(bytes(_name).length > 0, \"ERR_INVALID_NAME\");\r\n        require(bytes(_symbol).length > 0, \"ERR_INVALID_SYMBOL\");\r\n\r\n        name = _name;\r\n        symbol = _symbol;\r\n        decimals = _decimals;\r\n        totalSupply = _totalSupply;\r\n        balanceOf[msg.sender] = _totalSupply;\r\n    }\r\n\r\n    /**\r\n      * @dev transfers tokens to a given address\r\n      * throws on any error rather then return a false flag to minimize user errors\r\n      *\r\n      * @param _to      target address\r\n      * @param _value   transfer amount\r\n      *\r\n      * @return true if the transfer was successful, false if it wasn't\r\n    */\r\n    function transfer(address _to, uint256 _value)\r\n        public\r\n        virtual\r\n        override\r\n        validAddress(_to)\r\n        returns (bool)\r\n    {\r\n        balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);\r\n        balanceOf[_to] = balanceOf[_to].add(_value);\r\n        emit Transfer(msg.sender, _to, _value);\r\n        return true;\r\n    }\r\n\r\n    /**\r\n      * @dev transfers tokens to a given address on behalf of another address\r\n      * throws on any error rather then return a false flag to minimize user errors\r\n      *\r\n      * @param _from    source address\r\n      * @param _to      target address\r\n      * @param _value   transfer amount\r\n      *\r\n      * @return true if the transfer was successful, false if it wasn't\r\n    */\r\n    function transferFrom(address _from, address _to, uint256 _value)\r\n        public\r\n        virtual\r\n        override\r\n        validAddress(_from)\r\n        validAddress(_to)\r\n        returns (bool)\r\n    {\r\n        allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);\r\n        balanceOf[_from] = balanceOf[_from].sub(_value);\r\n        balanceOf[_to] = balanceOf[_to].add(_value);\r\n        emit Transfer(_from, _to, _value);\r\n        return true;\r\n    }\r\n\r\n    /**\r\n      * @dev allows another account/contract to transfers tokens on behalf of the caller\r\n      * throws on any error rather then return a false flag to minimize user errors\r\n      *\r\n      * also, to minimize the risk of the approve/transferFrom attack vector\r\n      * 
  "sourcePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/ERC20Token.sol",
  "ast": {
    "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/ERC20Token.sol",
    "exportedSymbols": {
      "ERC20Token": [
        20617
      ]
    },
    "id": 20618,
    "license": "SEE LICENSE IN LICENSE",
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 20341,
        "literals": [
          "solidity",
          "0.6",
          ".12"
        ],
        "nodeType": "PragmaDirective",
        "src": "52:23:48"
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/interfaces/IERC20Token.sol",
        "file": "./interfaces/IERC20Token.sol",
        "id": 20342,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 21463,
        "src": "77:38:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/Utils.sol",
        "file": "../utility/Utils.sol",
        "id": 20343,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 22997,
        "src": "117:30:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/SafeMath.sol",
        "file": "../utility/SafeMath.sol",
        "id": 20344,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 22690,
        "src": "149:33:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "abstract": false,
        "baseContracts": [
          {
            "arguments": null,
            "baseName": {
              "contractScope": null,
              "id": 20346,
              "name": "IERC20Token",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 21462,
              "src": "264:11:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_IERC20Token_$21462",
                "typeString": "contract IERC20Token"
              }
            },
            "id": 20347,
            "nodeType": "InheritanceSpecifier",
            "src": "264:11:48"
          },
          {
            "arguments": null,
            "baseName": {
              "contractScope": null,
              "id": 20348,
              "name": "Utils",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 22996,
              "src": "277:5:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_Utils_$22996",
                "typeString": "contract Utils"
              }
            },
            "id": 20349,
            "nodeType": "InheritanceSpecifier",
            "src": "277:5:48"
          }
        ],
        "contractDependencies": [
          21462,
          22996
        ],
        "contractKind": "contract",
        "documentation": {
          "id": 20345,
          "nodeType": "StructuredDocumentation",
          "src": "186:53:48",
          "text": " @dev ERC20 Standard Token implementation"
        },
        "fullyImplemented": true,
        "id": 20617,
        "linearizedBaseContracts": [
          20617,
          22996,
          21462
        ],
        "name": "ERC20Token",
        "nodeType": "ContractDefinition",
        "nodes": [
          {
            "id": 20352,
            "libraryName": {
              "contractScope": null,
              "id": 20350,
              "name": "SafeMath",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 22689,
              "src": "296:8:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_SafeMath_$22689",
                "typeString": "library SafeMath"
              }
            },
            "nodeType": "UsingForDirective",
            "src": "290:27:48",
            "typeName": {
              "id": 20351,
              "name": "uint256",
              "nodeType": "ElementaryTypeName",
              "src": "309:7:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint256",
                "typeString": "uint256"
              }
            }
          },
          {
            "baseFunctions": [
              21401
            ],
            "constant": false,
            "functionSelector": "06fdde03",
            "id": 20355,
            "mutability": "mutable",
            "name": "name",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20354,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "341:8:48"
            },
            "scope": 20617,
            "src": "327:27:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_string_storage",
              "typeString": "string"
            },
            "typeName": {
              "id": 20353,
              "name": "string",
              "nodeType": "ElementaryTypeName",
              "src": "327:6:48",
              "typeDescriptions": {
                "typeIdentifier": "t_string_storage_ptr",
                "typeString": "string"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21406
            ],
            "constant": false,
            "functionSelector": "95d89b41",
            "id": 20358,
            "mutability": "mutable",
            "name": "symbol",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20357,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "375:8:48"
            },
            "scope": 20617,
            "src": "361:29:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_string_storage",
              "typeString": "string"
            },
            "typeName": {
              "id": 20356,
              "name": "string",
              "nodeType": "ElementaryTypeName",
              "src": "361:6:48",
              "typeDescriptions": {
                "typeIdentifier": "t_string_storage_ptr",
                "typeString": "string"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21411
            ],
            "constant": false,
            "functionSelector": "313ce567",
            "id": 20361,
            "mutability": "mutable",
            "name": "decimals",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20360,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "410:8:48"
            },
            "scope": 20617,
            "src": "397:30:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_uint8",
              "typeString": "uint8"
            },
            "typeName": {
              "id": 20359,
              "name": "uint8",
              "nodeType": "ElementaryTypeName",
              "src": "397:5:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint8",
                "typeString": "uint8"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21416
            ],
            "constant": false,
            "functionSelector": "18160ddd",
            "id": 20364,
            "mutability": "mutable",
            "name": "totalSupply",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20363,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "449:8:48"
            },
            "scope": 20617,
            "src": "434:35:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_uint256",
              "typeString": "uint256"
            },
            "typeName": {
              "id": 20362,
              "name": "uint256",
              "nodeType": "ElementaryTypeName",
              "src": "434:7:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint256",
                "typeString": "uint256"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21423
            ],
            "constant": false,
            "functionSelector": "70a08231",
            "id": 20369,
            "mutability": "mutable",
            "name": "balanceOf",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20368,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "512:8:48"
            },
            "scope": 20617,
            "src": "476:54:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
              "typeString": "mapping(address => uint256)"
            },
            "typeName": {
              "id": 20367,
              "keyType": {
                "id": 20365,
                "name": "address",
                "nodeType": "ElementaryTypeName",
                "src": "485:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_address",
                  "typeString": "address"
                }
              },
              "nodeType": "Mapping",
              "src": "476:28:48",
              "typeDescriptions": {
                "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                "typeString": "mapping(address => uint256)"
              },
              "valueType": {
                "id": 20366,
                "name": "uint256",
                "nodeType": "ElementaryTypeName",
                "src": "496:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_uint256",
                  "typeString": "uint256"
                }
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21432
            ],
            "constant": false,
            "functionSelector": "dd62ed3e",
            "id": 20376,
            "mutability": "mutable",
            "name": "allowance",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20375,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "594:8:48"
            },
            "scope": 20617,
            "src": "537:75:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
              "typeString": "mapping(address => mapping(address => uint256))"
            },
            "typeName": {
              "id": 20374,
              "keyType": {
                "id": 20370,
                "name": "address",
                "nodeType": "ElementaryTypeName",
                "src": "546:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_address",
                  "typeString": "address"
                }
              },
              "nodeType": "Mapping",
              "src": "537:49:48",
              "typeDescriptions": {
                "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                "typeString": "mapping(address => mapping(address => uint256))"
              },
              "valueType": {
                "id": 20373,
                "keyType": {
                  "id": 20371,
                  "name": "address",
                  "nodeType": "ElementaryTypeName",
                  "src": "566:7:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  }
                },
                "nodeType": "Mapping",
                "src": "557:28:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                  "typeString": "mapping(address => uint256)"
                },
                "valueType": {
                  "id": 20372,
                  "name": "uint256",
                  "nodeType": "ElementaryTypeName",
                  "src": "577:7:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  }
                }
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "anonymous": false,
            "documentation": {
              "id": 20377,
              "nodeType": "StructuredDocumentation",
              "src": "621:209:48",
              "text": " @dev triggered when tokens are transferred between wallets\n @param _from    source address\n @param _to      target address\n @param _value   transfer amount"
            },
            "id": 20385,
            "name": "Transfer",
            "nodeType": "EventDefinition",
            "parameters": {
              "id": 20384,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20379,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_from",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "851:21:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20378,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "851:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20381,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "874:19:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20380,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "874:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20383,
                  "indexed": false,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "895:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20382,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "895:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "850:60:48"
            },
            "src": "836:75:48"
          },
          {
            "anonymous": false,
            "documentation": {
              "id": 20386,
              "nodeType": "StructuredDocumentation",
              "src": "919:280:48",
              "text": " @dev triggered when a wallet allows another wallet to transfer tokens from on its behalf\n @param _owner   wallet that approves the allowance\n @param _spender wallet that receives the allowance\n @param _value   allowance amount"
            },
            "id": 20394,
            "name": "Approval",
            "nodeType": "EventDefinition",
            "parameters": {
              "id": 20393,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20388,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_owner",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1220:22:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20387,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "1220:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20390,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_spender",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1244:24:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20389,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "1244:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20392,
                  "indexed": false,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1270:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20391,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "1270:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "1219:66:48"
            },
            "src": "1205:81:48"
          },
          {
            "body": {
              "id": 20451,
              "nodeType": "Block",
              "src": "1679:332:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        },
                        "id": 20413,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "arguments": [
                              {
                                "argumentTypes": null,
                                "id": 20409,
                                "name": "_name",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20397,
                                "src": "1731:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              }
                            ],
                            "expression": {
                              "argumentTypes": [
                                {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              ],
                              "id": 20408,
                              "isConstant": false,
                              "isLValue": false,
                              "isPure": true,
                              "lValueRequested": false,
                              "nodeType": "ElementaryTypeNameExpression",
                              "src": "1725:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_type$_t_bytes_storage_ptr_$",
                                "typeString": "type(bytes storage pointer)"
                              },
                              "typeName": {
                                "id": 20407,
                                "name": "bytes",
                                "nodeType": "ElementaryTypeName",
                                "src": "1725:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": null,
                                  "typeString": null
                                }
                              }
                            },
                            "id": 20410,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "kind": "typeConversion",
                            "lValueRequested": false,
                            "names": [],
                            "nodeType": "FunctionCall",
                            "src": "1725:12:48",
                            "tryCall": false,
                            "typeDescriptions": {
                              "typeIdentifier": "t_bytes_memory_ptr",
                              "typeString": "bytes memory"
                            }
                          },
                          "id": 20411,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "length",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "1725:19:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": ">",
                        "rightExpression": {
                          "argumentTypes": null,
                          "hexValue": "30",
                          "id": 20412,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": true,
                          "kind": "number",
                          "lValueRequested": false,
                          "nodeType": "Literal",
                          "src": "1747:1:48",
                          "subdenomination": null,
                          "typeDescriptions": {
                            "typeIdentifier": "t_rational_0_by_1",
                            "typeString": "int_const 0"
                          },
                          "value": "0"
                        },
                        "src": "1725:23:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f4e414d45",
                        "id": 20414,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "1750:18:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_8c31b897cf1b4c41d9a3a2c9019700f5d8d0c36c906997985403c8f4610f8246",
                          "typeString": "literal_string \"ERR_INVALID_NAME\""
                        },
                        "value": "ERR_INVALID_NAME"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_8c31b897cf1b4c41d9a3a2c9019700f5d8d0c36c906997985403c8f4610f8246",
                          "typeString": "literal_string \"ERR_INVALID_NAME\""
                        }
                      ],
                      "id": 20406,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "1717:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20415,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "1717:52:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20416,
                  "nodeType": "ExpressionStatement",
                  "src": "1717:52:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        },
                        "id": 20424,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "arguments": [
                              {
                                "argumentTypes": null,
                                "id": 20420,
                                "name": "_symbol",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20399,
                                "src": "1794:7:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              }
                            ],
                            "expression": {
                              "argumentTypes": [
                                {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              ],
                              "id": 20419,
                              "isConstant": false,
                              "isLValue": false,
                              "isPure": true,
                              "lValueRequested": false,
                              "nodeType": "ElementaryTypeNameExpression",
                              "src": "1788:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_type$_t_bytes_storage_ptr_$",
                                "typeString": "type(bytes storage pointer)"
                              },
                              "typeName": {
                                "id": 20418,
                                "name": "bytes",
                                "nodeType": "ElementaryTypeName",
                                "src": "1788:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": null,
                                  "typeString": null
                                }
                              }
                            },
                            "id": 20421,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "kind": "typeConversion",
                            "lValueRequested": false,
                            "names": [],
                            "nodeType": "FunctionCall",
                            "src": "1788:14:48",
                            "tryCall": false,
                            "typeDescriptions": {
                              "typeIdentifier": "t_bytes_memory_ptr",
                              "typeString": "bytes memory"
                            }
                          },
                          "id": 20422,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "length",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "1788:21:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": ">",
                        "rightExpression": {
                          "argumentTypes": null,
                          "hexValue": "30",
                          "id": 20423,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": true,
                          "kind": "number",
                          "lValueRequested": false,
                          "nodeType": "Literal",
                          "src": "1812:1:48",
                          "subdenomination": null,
                          "typeDescriptions": {
                            "typeIdentifier": "t_rational_0_by_1",
                            "typeString": "int_const 0"
                          },
                          "value": "0"
                        },
                        "src": "1788:25:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f53594d424f4c",
                        "id": 20425,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "1815:20:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_8cbe13dffb618f268f4d803a75787a665744c462e7a6ba0f32e015df7f7a2fda",
                          "typeString": "literal_string \"ERR_INVALID_SYMBOL\""
                        },
                        "value": "ERR_INVALID_SYMBOL"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_8cbe13dffb618f268f4d803a75787a665744c462e7a6ba0f32e015df7f7a2fda",
                          "typeString": "literal_string \"ERR_INVALID_SYMBOL\""
                        }
                      ],
                      "id": 20417,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "1780:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20426,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "1780:56:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20427,
                  "nodeType": "ExpressionStatement",
                  "src": "1780:56:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20430,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20428,
                      "name": "name",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20355,
                      "src": "1849:4:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_storage",
                        "typeString": "string storage ref"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20429,
                      "name": "_name",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20397,
                      "src": "1856:5:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_memory_ptr",
                        "typeString": "string memory"
                      }
                    },
                    "src": "1849:12:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage",
                      "typeString": "string storage ref"
                    }
                  },
                  "id": 20431,
                  "nodeType": "ExpressionStatement",
                  "src": "1849:12:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20434,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20432,
                      "name": "symbol",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20358,
                      "src": "1872:6:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_storage",
                        "typeString": "string storage ref"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20433,
                      "name": "_symbol",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20399,
                      "src": "1881:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_memory_ptr",
                        "typeString": "string memory"
                      }
                    },
                    "src": "1872:16:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage",
                      "typeString": "string storage ref"
                    }
                  },
                  "id": 20435,
                  "nodeType": "ExpressionStatement",
                  "src": "1872:16:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20438,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20436,
                      "name": "decimals",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20361,
                      "src": "1899:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint8",
                        "typeString": "uint8"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20437,
                      "name": "_decimals",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20401,
                      "src": "1910:9:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint8",
                        "typeString": "uint8"
                      }
                    },
                    "src": "1899:20:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint8",
                      "typeString": "uint8"
                    }
                  },
                  "id": 20439,
                  "nodeType": "ExpressionStatement",
                  "src": "1899:20:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20442,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20440,
                      "name": "totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20364,
                      "src": "1930:11:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20441,
                      "name": "_totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20403,
                      "src": "1944:12:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "1930:26:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20443,
                  "nodeType": "ExpressionStatement",
                  "src": "1930:26:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20449,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20444,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "1967:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20447,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20445,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "1977:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20446,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "1977:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "1967:21:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20448,
                      "name": "_totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20403,
                      "src": "1991:12:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "1967:36:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20450,
                  "nodeType": "ExpressionStatement",
                  "src": "1967:36:48"
                }
              ]
            },
            "documentation": {
              "id": 20395,
              "nodeType": "StructuredDocumentation",
              "src": "1294:277:48",
              "text": " @dev initializes a new ERC20Token instance\n @param _name        token name\n @param _symbol      token symbol\n @param _decimals    decimal points, for display purposes\n @param _totalSupply total supply of token units"
            },
            "id": 20452,
            "implemented": true,
            "kind": "constructor",
            "modifiers": [],
            "name": "",
            "nodeType": "FunctionDefinition",
            "overrides": null,
            "parameters": {
              "id": 20404,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20397,
                  "mutability": "mutable",
                  "name": "_name",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1589:19:48",
                  "stateVariable": false,
                  "storageLocation": "memory",
                  "typeDescriptions": {
                    "typeIdentifier": "t_string_memory_ptr",
                    "typeString": "string"
                  },
                  "typeName": {
                    "id": 20396,
                    "name": "string",
                    "nodeType": "ElementaryTypeName",
                    "src": "1589:6:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage_ptr",
                      "typeString": "string"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20399,
                  "mutability": "mutable",
                  "name": "_symbol",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1610:21:48",
                  "stateVariable": false,
                  "storageLocation": "memory",
                  "typeDescriptions": {
                    "typeIdentifier": "t_string_memory_ptr",
                    "typeString": "string"
                  },
                  "typeName": {
                    "id": 20398,
                    "name": "string",
                    "nodeType": "ElementaryTypeName",
                    "src": "1610:6:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage_ptr",
                      "typeString": "string"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20401,
                  "mutability": "mutable",
                  "name": "_decimals",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1633:15:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint8",
                    "typeString": "uint8"
                  },
                  "typeName": {
                    "id": 20400,
                    "name": "uint8",
                    "nodeType": "ElementaryTypeName",
                    "src": "1633:5:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint8",
                      "typeString": "uint8"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20403,
                  "mutability": "mutable",
                  "name": "_totalSupply",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1650:20:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20402,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "1650:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "1588:83:48"
            },
            "returnParameters": {
              "id": 20405,
              "nodeType": "ParameterList",
              "parameters": [],
              "src": "1679:0:48"
            },
            "scope": 20617,
            "src": "1577:434:48",
            "stateMutability": "nonpayable",
            "virtual": false,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21441
            ],
            "body": {
              "id": 20499,
              "nodeType": "Block",
              "src": "2497:201:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20477,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20466,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "2508:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20469,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20467,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "2518:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20468,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "2518:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "2508:21:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20475,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20457,
                          "src": "2558:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20470,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "2532:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20473,
                          "indexExpression": {
                            "argumentTypes": null,
                            "expression": {
                              "argumentTypes": null,
                              "id": 20471,
                              "name": "msg",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": -15,
                              "src": "2542:3:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_magic_message",
                                "typeString": "msg"
                              }
                            },
                            "id": 20472,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "lValueRequested": false,
                            "memberName": "sender",
                            "nodeType": "MemberAccess",
                            "referencedDeclaration": null,
                            "src": "2542:10:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address_payable",
                              "typeString": "address payable"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "2532:21:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20474,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "2532:25:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20476,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "2532:33:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "2508:57:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20478,
                  "nodeType": "ExpressionStatement",
                  "src": "2508:57:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20488,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20479,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "2576:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20481,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20480,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20455,
                        "src": "2586:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "2576:14:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20486,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20457,
                          "src": "2612:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20482,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "2593:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20484,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20483,
                            "name": "_to",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20455,
                            "src": "2603:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "2593:14:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20485,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "add",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22606,
                        "src": "2593:18:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20487,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "2593:26:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "2576:43:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20489,
                  "nodeType": "ExpressionStatement",
                  "src": "2576:43:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20491,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "2644:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20492,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "2644:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20493,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20455,
                        "src": "2656:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20494,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20457,
                        "src": "2661:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20490,
                      "name": "Transfer",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20385,
                      "src": "2635:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20495,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "2635:33:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20496,
                  "nodeType": "EmitStatement",
                  "src": "2630:38:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20497,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "2686:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20465,
                  "id": 20498,
                  "nodeType": "Return",
                  "src": "2679:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20453,
              "nodeType": "StructuredDocumentation",
              "src": "2019:318:48",
              "text": " @dev transfers tokens to a given address\n throws on any error rather then return a false flag to minimize user errors\n @param _to      target address\n @param _value   transfer amount\n @return true if the transfer was successful, false if it wasn't"
            },
            "functionSelector": "a9059cbb",
            "id": 20500,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20461,
                    "name": "_to",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20455,
                    "src": "2463:3:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20462,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20460,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "2450:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "2450:17:48"
              }
            ],
            "name": "transfer",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20459,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "2432:8:48"
            },
            "parameters": {
              "id": 20458,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20455,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2361:11:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20454,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "2361:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20457,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2374:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20456,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "2374:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "2360:29:48"
            },
            "returnParameters": {
              "id": 20465,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20464,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2486:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20463,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "2486:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "2485:6:48"
            },
            "scope": 20617,
            "src": "2343:355:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21452
            ],
            "body": {
              "id": 20566,
              "nodeType": "Block",
              "src": "3301:268:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20534,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "baseExpression": {
                          "argumentTypes": null,
                          "id": 20519,
                          "name": "allowance",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20376,
                          "src": "3312:9:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                            "typeString": "mapping(address => mapping(address => uint256))"
                          }
                        },
                        "id": 20523,
                        "indexExpression": {
                          "argumentTypes": null,
                          "id": 20520,
                          "name": "_from",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20503,
                          "src": "3322:5:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_address",
                            "typeString": "address"
                          }
                        },
                        "isConstant": false,
                        "isLValue": true,
                        "isPure": false,
                        "lValueRequested": false,
                        "nodeType": "IndexAccess",
                        "src": "3312:16:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20524,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20521,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "3329:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20522,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "3329:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3312:28:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20532,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3376:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "baseExpression": {
                              "argumentTypes": null,
                              "id": 20525,
                              "name": "allowance",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20376,
                              "src": "3343:9:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                                "typeString": "mapping(address => mapping(address => uint256))"
                              }
                            },
                            "id": 20527,
                            "indexExpression": {
                              "argumentTypes": null,
                              "id": 20526,
                              "name": "_from",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20503,
                              "src": "3353:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
                              }
                            },
                            "isConstant": false,
                            "isLValue": true,
                            "isPure": false,
                            "lValueRequested": false,
                            "nodeType": "IndexAccess",
                            "src": "3343:16:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20530,
                          "indexExpression": {
                            "argumentTypes": null,
                            "expression": {
                              "argumentTypes": null,
                              "id": 20528,
                              "name": "msg",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": -15,
                              "src": "3360:3:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_magic_message",
                                "typeString": "msg"
                              }
                            },
                            "id": 20529,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "lValueRequested": false,
                            "memberName": "sender",
                            "nodeType": "MemberAccess",
                            "referencedDeclaration": null,
                            "src": "3360:10:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address_payable",
                              "typeString": "address payable"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3343:28:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20531,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "3343:32:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20533,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3343:40:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3312:71:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20535,
                  "nodeType": "ExpressionStatement",
                  "src": "3312:71:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20545,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20536,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "3394:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20538,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20537,
                        "name": "_from",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20503,
                        "src": "3404:5:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3394:16:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20543,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3434:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20539,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "3413:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20541,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20540,
                            "name": "_from",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20503,
                            "src": "3423:5:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3413:16:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20542,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "3413:20:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20544,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3413:28:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3394:47:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20546,
                  "nodeType": "ExpressionStatement",
                  "src": "3394:47:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20556,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20547,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "3452:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20549,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20548,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20505,
                        "src": "3462:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3452:14:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20554,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3488:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20550,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "3469:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20552,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20551,
                            "name": "_to",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20505,
                            "src": "3479:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3469:14:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20553,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "add",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22606,
                        "src": "3469:18:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20555,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3469:26:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3452:43:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20557,
                  "nodeType": "ExpressionStatement",
                  "src": "3452:43:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "id": 20559,
                        "name": "_from",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20503,
                        "src": "3520:5:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20560,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20505,
                        "src": "3527:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20561,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20507,
                        "src": "3532:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20558,
                      "name": "Transfer",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20385,
                      "src": "3511:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20562,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "3511:28:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20563,
                  "nodeType": "EmitStatement",
                  "src": "3506:33:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20564,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "3557:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20518,
                  "id": 20565,
                  "nodeType": "Return",
                  "src": "3550:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20501,
              "nodeType": "StructuredDocumentation",
              "src": "2706:387:48",
              "text": " @dev transfers tokens to a given address on behalf of another address\n throws on any error rather then return a false flag to minimize user errors\n @param _from    source address\n @param _to      target address\n @param _value   transfer amount\n @return true if the transfer was successful, false if it wasn't"
            },
            "functionSelector": "23b872dd",
            "id": 20567,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20511,
                    "name": "_from",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20503,
                    "src": "3238:5:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20512,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20510,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "3225:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "3225:19:48"
              },
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20514,
                    "name": "_to",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20505,
                    "src": "3267:3:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20515,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20513,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "3254:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "3254:17:48"
              }
            ],
            "name": "transferFrom",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20509,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "3207:8:48"
            },
            "parameters": {
              "id": 20508,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20503,
                  "mutability": "mutable",
                  "name": "_from",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3121:13:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20502,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "3121:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20505,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3136:11:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20504,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "3136:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20507,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3149:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20506,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "3149:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "3120:44:48"
            },
            "returnParameters": {
              "id": 20518,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20517,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3290:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20516,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "3290:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "3289:6:48"
            },
            "scope": 20617,
            "src": "3099:470:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21461
            ],
            "body": {
              "id": 20615,
              "nodeType": "Block",
              "src": "4447:356:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        "id": 20593,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "commonType": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          },
                          "id": 20584,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "leftExpression": {
                            "argumentTypes": null,
                            "id": 20582,
                            "name": "_value",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20572,
                            "src": "4592:6:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_uint256",
                              "typeString": "uint256"
                            }
                          },
                          "nodeType": "BinaryOperation",
                          "operator": "==",
                          "rightExpression": {
                            "argumentTypes": null,
                            "hexValue": "30",
                            "id": 20583,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": true,
                            "kind": "number",
                            "lValueRequested": false,
                            "nodeType": "Literal",
                            "src": "4602:1:48",
                            "subdenomination": null,
                            "typeDescriptions": {
                              "typeIdentifier": "t_rational_0_by_1",
                              "typeString": "int_const 0"
                            },
                            "value": "0"
                          },
                          "src": "4592:11:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_bool",
                            "typeString": "bool"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": "||",
                        "rightExpression": {
                          "argumentTypes": null,
                          "commonType": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          },
                          "id": 20592,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "leftExpression": {
                            "argumentTypes": null,
                            "baseExpression": {
                              "argumentTypes": null,
                              "baseExpression": {
                                "argumentTypes": null,
                                "id": 20585,
                                "name": "allowance",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20376,
                                "src": "4607:9:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                                  "typeString": "mapping(address => mapping(address => uint256))"
                                }
                              },
                              "id": 20588,
                              "indexExpression": {
                                "argumentTypes": null,
                                "expression": {
                                  "argumentTypes": null,
                                  "id": 20586,
                                  "name": "msg",
                                  "nodeType": "Identifier",
                                  "overloadedDeclarations": [],
                                  "referencedDeclaration": -15,
                                  "src": "4617:3:48",
                                  "typeDescriptions": {
                                    "typeIdentifier": "t_magic_message",
                                    "typeString": "msg"
                                  }
                                },
                                "id": 20587,
                                "isConstant": false,
                                "isLValue": false,
                                "isPure": false,
                                "lValueRequested": false,
                                "memberName": "sender",
                                "nodeType": "MemberAccess",
                                "referencedDeclaration": null,
                                "src": "4617:10:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_address_payable",
                                  "typeString": "address payable"
                                }
                              },
                              "isConstant": false,
                              "isLValue": true,
                              "isPure": false,
                              "lValueRequested": false,
                              "nodeType": "IndexAccess",
                              "src": "4607:21:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                                "typeString": "mapping(address => uint256)"
                              }
                            },
                            "id": 20590,
                            "indexExpression": {
                              "argumentTypes": null,
                              "id": 20589,
                              "name": "_spender",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20570,
                              "src": "4629:8:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
                              }
                            },
                            "isConstant": false,
                            "isLValue": true,
                            "isPure": false,
                            "lValueRequested": false,
                            "nodeType": "IndexAccess",
                            "src": "4607:31:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_uint256",
                              "typeString": "uint256"
                            }
                          },
                          "nodeType": "BinaryOperation",
                          "operator": "==",
                          "rightExpression": {
                            "argumentTypes": null,
                            "hexValue": "30",
                            "id": 20591,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": true,
                            "kind": "number",
                            "lValueRequested": false,
                            "nodeType": "Literal",
                            "src": "4642:1:48",
                            "subdenomination": null,
                            "typeDescriptions": {
                              "typeIdentifier": "t_rational_0_by_1",
                              "typeString": "int_const 0"
                            },
                            "value": "0"
                          },
                          "src": "4607:36:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_bool",
                            "typeString": "bool"
                          }
                        },
                        "src": "4592:51:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f414d4f554e54",
                        "id": 20594,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "4645:20:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_c44007bfe4e704be0ed1393660a827b4f88825f4b6fe1bc10cd38fc3fcb7d839",
                          "typeString": "literal_string \"ERR_INVALID_AMOUNT\""
                        },
                        "value": "ERR_INVALID_AMOUNT"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_c44007bfe4e704be0ed1393660a827b4f88825f4b6fe1bc10cd38fc3fcb7d839",
                          "typeString": "literal_string \"ERR_INVALID_AMOUNT\""
                        }
                      ],
                      "id": 20581,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "4584:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20595,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "4584:82:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20596,
                  "nodeType": "ExpressionStatement",
                  "src": "4584:82:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20604,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "baseExpression": {
                          "argumentTypes": null,
                          "id": 20597,
                          "name": "allowance",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20376,
                          "src": "4679:9:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                            "typeString": "mapping(address => mapping(address => uint256))"
                          }
                        },
                        "id": 20601,
                        "indexExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "id": 20598,
                            "name": "msg",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": -15,
                            "src": "4689:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_magic_message",
                              "typeString": "msg"
                            }
                          },
                          "id": 20599,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "sender",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "4689:10:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_address_payable",
                            "typeString": "address payable"
                          }
                        },
                        "isConstant": false,
                        "isLValue": true,
                        "isPure": false,
                        "lValueRequested": false,
                        "nodeType": "IndexAccess",
                        "src": "4679:21:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20602,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20600,
                        "name": "_spender",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20570,
                        "src": "4701:8:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "4679:31:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20603,
                      "name": "_value",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20572,
                      "src": "4713:6:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "4679:40:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20605,
                  "nodeType": "ExpressionStatement",
                  "src": "4679:40:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20607,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "4744:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20608,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "4744:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20609,
                        "name": "_spender",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20570,
                        "src": "4756:8:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20610,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20572,
                        "src": "4766:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20606,
                      "name": "Approval",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20394,
                      "src": "4735:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20611,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "4735:38:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20612,
                  "nodeType": "EmitStatement",
                  "src": "4730:43:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20613,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "4791:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20580,
                  "id": 20614,
                  "nodeType": "Return",
                  "src": "4784:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20568,
              "nodeType": "StructuredDocumentation",
              "src": "3577:701:48",
              "text": " @dev allows another account/contract to transfers tokens on behalf of the caller\n throws on any error rather then return a false flag to minimize user errors\n also, to minimize the risk of the approve/transferFrom attack vector\n (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice\n in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value\n @param _spender approved address\n @param _value   allowance amount\n @return true if the approval was successful, false if it wasn't"
            },
            "functionSelector": "095ea7b3",
            "id": 20616,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20576,
                    "name": "_spender",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20570,
                    "src": "4408:8:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20577,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20575,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "4395:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "4395:22:48"
              }
            ],
            "name": "approve",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20574,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "4377:8:48"
            },
            "parameters": {
              "id": 20573,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20570,
                  "mutability": "mutable",
                  "name": "_spender",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4301:16:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20569,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "4301:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20572,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4319:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20571,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "4319:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "4300:34:48"
            },
            "returnParameters": {
              "id": 20580,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20579,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4436:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20578,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "4436:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "4435:6:48"
            },
            "scope": 20617,
            "src": "4284:519:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          }
        ],
        "scope": 20618,
        "src": "241:4565:48"
      }
    ],
    "src": "52:4756:48"
  },
  "legacyAST": {
    "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/ERC20Token.sol",
    "exportedSymbols": {
      "ERC20Token": [
        20617
      ]
    },
    "id": 20618,
    "license": "SEE LICENSE IN LICENSE",
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 20341,
        "literals": [
          "solidity",
          "0.6",
          ".12"
        ],
        "nodeType": "PragmaDirective",
        "src": "52:23:48"
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/interfaces/IERC20Token.sol",
        "file": "./interfaces/IERC20Token.sol",
        "id": 20342,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 21463,
        "src": "77:38:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/Utils.sol",
        "file": "../utility/Utils.sol",
        "id": 20343,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 22997,
        "src": "117:30:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/SafeMath.sol",
        "file": "../utility/SafeMath.sol",
        "id": 20344,
        "nodeType": "ImportDirective",
        "scope": 20618,
        "sourceUnit": 22690,
        "src": "149:33:48",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "abstract": false,
        "baseContracts": [
          {
            "arguments": null,
            "baseName": {
              "contractScope": null,
              "id": 20346,
              "name": "IERC20Token",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 21462,
              "src": "264:11:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_IERC20Token_$21462",
                "typeString": "contract IERC20Token"
              }
            },
            "id": 20347,
            "nodeType": "InheritanceSpecifier",
            "src": "264:11:48"
          },
          {
            "arguments": null,
            "baseName": {
              "contractScope": null,
              "id": 20348,
              "name": "Utils",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 22996,
              "src": "277:5:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_Utils_$22996",
                "typeString": "contract Utils"
              }
            },
            "id": 20349,
            "nodeType": "InheritanceSpecifier",
            "src": "277:5:48"
          }
        ],
        "contractDependencies": [
          21462,
          22996
        ],
        "contractKind": "contract",
        "documentation": {
          "id": 20345,
          "nodeType": "StructuredDocumentation",
          "src": "186:53:48",
          "text": " @dev ERC20 Standard Token implementation"
        },
        "fullyImplemented": true,
        "id": 20617,
        "linearizedBaseContracts": [
          20617,
          22996,
          21462
        ],
        "name": "ERC20Token",
        "nodeType": "ContractDefinition",
        "nodes": [
          {
            "id": 20352,
            "libraryName": {
              "contractScope": null,
              "id": 20350,
              "name": "SafeMath",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 22689,
              "src": "296:8:48",
              "typeDescriptions": {
                "typeIdentifier": "t_contract$_SafeMath_$22689",
                "typeString": "library SafeMath"
              }
            },
            "nodeType": "UsingForDirective",
            "src": "290:27:48",
            "typeName": {
              "id": 20351,
              "name": "uint256",
              "nodeType": "ElementaryTypeName",
              "src": "309:7:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint256",
                "typeString": "uint256"
              }
            }
          },
          {
            "baseFunctions": [
              21401
            ],
            "constant": false,
            "functionSelector": "06fdde03",
            "id": 20355,
            "mutability": "mutable",
            "name": "name",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20354,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "341:8:48"
            },
            "scope": 20617,
            "src": "327:27:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_string_storage",
              "typeString": "string"
            },
            "typeName": {
              "id": 20353,
              "name": "string",
              "nodeType": "ElementaryTypeName",
              "src": "327:6:48",
              "typeDescriptions": {
                "typeIdentifier": "t_string_storage_ptr",
                "typeString": "string"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21406
            ],
            "constant": false,
            "functionSelector": "95d89b41",
            "id": 20358,
            "mutability": "mutable",
            "name": "symbol",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20357,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "375:8:48"
            },
            "scope": 20617,
            "src": "361:29:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_string_storage",
              "typeString": "string"
            },
            "typeName": {
              "id": 20356,
              "name": "string",
              "nodeType": "ElementaryTypeName",
              "src": "361:6:48",
              "typeDescriptions": {
                "typeIdentifier": "t_string_storage_ptr",
                "typeString": "string"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21411
            ],
            "constant": false,
            "functionSelector": "313ce567",
            "id": 20361,
            "mutability": "mutable",
            "name": "decimals",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20360,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "410:8:48"
            },
            "scope": 20617,
            "src": "397:30:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_uint8",
              "typeString": "uint8"
            },
            "typeName": {
              "id": 20359,
              "name": "uint8",
              "nodeType": "ElementaryTypeName",
              "src": "397:5:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint8",
                "typeString": "uint8"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21416
            ],
            "constant": false,
            "functionSelector": "18160ddd",
            "id": 20364,
            "mutability": "mutable",
            "name": "totalSupply",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20363,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "449:8:48"
            },
            "scope": 20617,
            "src": "434:35:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_uint256",
              "typeString": "uint256"
            },
            "typeName": {
              "id": 20362,
              "name": "uint256",
              "nodeType": "ElementaryTypeName",
              "src": "434:7:48",
              "typeDescriptions": {
                "typeIdentifier": "t_uint256",
                "typeString": "uint256"
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21423
            ],
            "constant": false,
            "functionSelector": "70a08231",
            "id": 20369,
            "mutability": "mutable",
            "name": "balanceOf",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20368,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "512:8:48"
            },
            "scope": 20617,
            "src": "476:54:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
              "typeString": "mapping(address => uint256)"
            },
            "typeName": {
              "id": 20367,
              "keyType": {
                "id": 20365,
                "name": "address",
                "nodeType": "ElementaryTypeName",
                "src": "485:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_address",
                  "typeString": "address"
                }
              },
              "nodeType": "Mapping",
              "src": "476:28:48",
              "typeDescriptions": {
                "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                "typeString": "mapping(address => uint256)"
              },
              "valueType": {
                "id": 20366,
                "name": "uint256",
                "nodeType": "ElementaryTypeName",
                "src": "496:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_uint256",
                  "typeString": "uint256"
                }
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21432
            ],
            "constant": false,
            "functionSelector": "dd62ed3e",
            "id": 20376,
            "mutability": "mutable",
            "name": "allowance",
            "nodeType": "VariableDeclaration",
            "overrides": {
              "id": 20375,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "594:8:48"
            },
            "scope": 20617,
            "src": "537:75:48",
            "stateVariable": true,
            "storageLocation": "default",
            "typeDescriptions": {
              "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
              "typeString": "mapping(address => mapping(address => uint256))"
            },
            "typeName": {
              "id": 20374,
              "keyType": {
                "id": 20370,
                "name": "address",
                "nodeType": "ElementaryTypeName",
                "src": "546:7:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_address",
                  "typeString": "address"
                }
              },
              "nodeType": "Mapping",
              "src": "537:49:48",
              "typeDescriptions": {
                "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                "typeString": "mapping(address => mapping(address => uint256))"
              },
              "valueType": {
                "id": 20373,
                "keyType": {
                  "id": 20371,
                  "name": "address",
                  "nodeType": "ElementaryTypeName",
                  "src": "566:7:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  }
                },
                "nodeType": "Mapping",
                "src": "557:28:48",
                "typeDescriptions": {
                  "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                  "typeString": "mapping(address => uint256)"
                },
                "valueType": {
                  "id": 20372,
                  "name": "uint256",
                  "nodeType": "ElementaryTypeName",
                  "src": "577:7:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  }
                }
              }
            },
            "value": null,
            "visibility": "public"
          },
          {
            "anonymous": false,
            "documentation": {
              "id": 20377,
              "nodeType": "StructuredDocumentation",
              "src": "621:209:48",
              "text": " @dev triggered when tokens are transferred between wallets\n @param _from    source address\n @param _to      target address\n @param _value   transfer amount"
            },
            "id": 20385,
            "name": "Transfer",
            "nodeType": "EventDefinition",
            "parameters": {
              "id": 20384,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20379,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_from",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "851:21:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20378,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "851:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20381,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "874:19:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20380,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "874:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20383,
                  "indexed": false,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20385,
                  "src": "895:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20382,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "895:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "850:60:48"
            },
            "src": "836:75:48"
          },
          {
            "anonymous": false,
            "documentation": {
              "id": 20386,
              "nodeType": "StructuredDocumentation",
              "src": "919:280:48",
              "text": " @dev triggered when a wallet allows another wallet to transfer tokens from on its behalf\n @param _owner   wallet that approves the allowance\n @param _spender wallet that receives the allowance\n @param _value   allowance amount"
            },
            "id": 20394,
            "name": "Approval",
            "nodeType": "EventDefinition",
            "parameters": {
              "id": 20393,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20388,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_owner",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1220:22:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20387,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "1220:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20390,
                  "indexed": true,
                  "mutability": "mutable",
                  "name": "_spender",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1244:24:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20389,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "1244:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20392,
                  "indexed": false,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20394,
                  "src": "1270:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20391,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "1270:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "1219:66:48"
            },
            "src": "1205:81:48"
          },
          {
            "body": {
              "id": 20451,
              "nodeType": "Block",
              "src": "1679:332:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        },
                        "id": 20413,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "arguments": [
                              {
                                "argumentTypes": null,
                                "id": 20409,
                                "name": "_name",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20397,
                                "src": "1731:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              }
                            ],
                            "expression": {
                              "argumentTypes": [
                                {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              ],
                              "id": 20408,
                              "isConstant": false,
                              "isLValue": false,
                              "isPure": true,
                              "lValueRequested": false,
                              "nodeType": "ElementaryTypeNameExpression",
                              "src": "1725:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_type$_t_bytes_storage_ptr_$",
                                "typeString": "type(bytes storage pointer)"
                              },
                              "typeName": {
                                "id": 20407,
                                "name": "bytes",
                                "nodeType": "ElementaryTypeName",
                                "src": "1725:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": null,
                                  "typeString": null
                                }
                              }
                            },
                            "id": 20410,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "kind": "typeConversion",
                            "lValueRequested": false,
                            "names": [],
                            "nodeType": "FunctionCall",
                            "src": "1725:12:48",
                            "tryCall": false,
                            "typeDescriptions": {
                              "typeIdentifier": "t_bytes_memory_ptr",
                              "typeString": "bytes memory"
                            }
                          },
                          "id": 20411,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "length",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "1725:19:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": ">",
                        "rightExpression": {
                          "argumentTypes": null,
                          "hexValue": "30",
                          "id": 20412,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": true,
                          "kind": "number",
                          "lValueRequested": false,
                          "nodeType": "Literal",
                          "src": "1747:1:48",
                          "subdenomination": null,
                          "typeDescriptions": {
                            "typeIdentifier": "t_rational_0_by_1",
                            "typeString": "int_const 0"
                          },
                          "value": "0"
                        },
                        "src": "1725:23:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f4e414d45",
                        "id": 20414,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "1750:18:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_8c31b897cf1b4c41d9a3a2c9019700f5d8d0c36c906997985403c8f4610f8246",
                          "typeString": "literal_string \"ERR_INVALID_NAME\""
                        },
                        "value": "ERR_INVALID_NAME"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_8c31b897cf1b4c41d9a3a2c9019700f5d8d0c36c906997985403c8f4610f8246",
                          "typeString": "literal_string \"ERR_INVALID_NAME\""
                        }
                      ],
                      "id": 20406,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "1717:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20415,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "1717:52:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20416,
                  "nodeType": "ExpressionStatement",
                  "src": "1717:52:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        },
                        "id": 20424,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "arguments": [
                              {
                                "argumentTypes": null,
                                "id": 20420,
                                "name": "_symbol",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20399,
                                "src": "1794:7:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              }
                            ],
                            "expression": {
                              "argumentTypes": [
                                {
                                  "typeIdentifier": "t_string_memory_ptr",
                                  "typeString": "string memory"
                                }
                              ],
                              "id": 20419,
                              "isConstant": false,
                              "isLValue": false,
                              "isPure": true,
                              "lValueRequested": false,
                              "nodeType": "ElementaryTypeNameExpression",
                              "src": "1788:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_type$_t_bytes_storage_ptr_$",
                                "typeString": "type(bytes storage pointer)"
                              },
                              "typeName": {
                                "id": 20418,
                                "name": "bytes",
                                "nodeType": "ElementaryTypeName",
                                "src": "1788:5:48",
                                "typeDescriptions": {
                                  "typeIdentifier": null,
                                  "typeString": null
                                }
                              }
                            },
                            "id": 20421,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "kind": "typeConversion",
                            "lValueRequested": false,
                            "names": [],
                            "nodeType": "FunctionCall",
                            "src": "1788:14:48",
                            "tryCall": false,
                            "typeDescriptions": {
                              "typeIdentifier": "t_bytes_memory_ptr",
                              "typeString": "bytes memory"
                            }
                          },
                          "id": 20422,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "length",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "1788:21:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": ">",
                        "rightExpression": {
                          "argumentTypes": null,
                          "hexValue": "30",
                          "id": 20423,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": true,
                          "kind": "number",
                          "lValueRequested": false,
                          "nodeType": "Literal",
                          "src": "1812:1:48",
                          "subdenomination": null,
                          "typeDescriptions": {
                            "typeIdentifier": "t_rational_0_by_1",
                            "typeString": "int_const 0"
                          },
                          "value": "0"
                        },
                        "src": "1788:25:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f53594d424f4c",
                        "id": 20425,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "1815:20:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_8cbe13dffb618f268f4d803a75787a665744c462e7a6ba0f32e015df7f7a2fda",
                          "typeString": "literal_string \"ERR_INVALID_SYMBOL\""
                        },
                        "value": "ERR_INVALID_SYMBOL"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_8cbe13dffb618f268f4d803a75787a665744c462e7a6ba0f32e015df7f7a2fda",
                          "typeString": "literal_string \"ERR_INVALID_SYMBOL\""
                        }
                      ],
                      "id": 20417,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "1780:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20426,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "1780:56:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20427,
                  "nodeType": "ExpressionStatement",
                  "src": "1780:56:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20430,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20428,
                      "name": "name",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20355,
                      "src": "1849:4:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_storage",
                        "typeString": "string storage ref"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20429,
                      "name": "_name",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20397,
                      "src": "1856:5:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_memory_ptr",
                        "typeString": "string memory"
                      }
                    },
                    "src": "1849:12:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage",
                      "typeString": "string storage ref"
                    }
                  },
                  "id": 20431,
                  "nodeType": "ExpressionStatement",
                  "src": "1849:12:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20434,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20432,
                      "name": "symbol",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20358,
                      "src": "1872:6:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_storage",
                        "typeString": "string storage ref"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20433,
                      "name": "_symbol",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20399,
                      "src": "1881:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_string_memory_ptr",
                        "typeString": "string memory"
                      }
                    },
                    "src": "1872:16:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage",
                      "typeString": "string storage ref"
                    }
                  },
                  "id": 20435,
                  "nodeType": "ExpressionStatement",
                  "src": "1872:16:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20438,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20436,
                      "name": "decimals",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20361,
                      "src": "1899:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint8",
                        "typeString": "uint8"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20437,
                      "name": "_decimals",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20401,
                      "src": "1910:9:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint8",
                        "typeString": "uint8"
                      }
                    },
                    "src": "1899:20:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint8",
                      "typeString": "uint8"
                    }
                  },
                  "id": 20439,
                  "nodeType": "ExpressionStatement",
                  "src": "1899:20:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20442,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "id": 20440,
                      "name": "totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20364,
                      "src": "1930:11:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20441,
                      "name": "_totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20403,
                      "src": "1944:12:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "1930:26:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20443,
                  "nodeType": "ExpressionStatement",
                  "src": "1930:26:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20449,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20444,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "1967:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20447,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20445,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "1977:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20446,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "1977:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "1967:21:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20448,
                      "name": "_totalSupply",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20403,
                      "src": "1991:12:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "1967:36:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20450,
                  "nodeType": "ExpressionStatement",
                  "src": "1967:36:48"
                }
              ]
            },
            "documentation": {
              "id": 20395,
              "nodeType": "StructuredDocumentation",
              "src": "1294:277:48",
              "text": " @dev initializes a new ERC20Token instance\n @param _name        token name\n @param _symbol      token symbol\n @param _decimals    decimal points, for display purposes\n @param _totalSupply total supply of token units"
            },
            "id": 20452,
            "implemented": true,
            "kind": "constructor",
            "modifiers": [],
            "name": "",
            "nodeType": "FunctionDefinition",
            "overrides": null,
            "parameters": {
              "id": 20404,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20397,
                  "mutability": "mutable",
                  "name": "_name",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1589:19:48",
                  "stateVariable": false,
                  "storageLocation": "memory",
                  "typeDescriptions": {
                    "typeIdentifier": "t_string_memory_ptr",
                    "typeString": "string"
                  },
                  "typeName": {
                    "id": 20396,
                    "name": "string",
                    "nodeType": "ElementaryTypeName",
                    "src": "1589:6:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage_ptr",
                      "typeString": "string"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20399,
                  "mutability": "mutable",
                  "name": "_symbol",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1610:21:48",
                  "stateVariable": false,
                  "storageLocation": "memory",
                  "typeDescriptions": {
                    "typeIdentifier": "t_string_memory_ptr",
                    "typeString": "string"
                  },
                  "typeName": {
                    "id": 20398,
                    "name": "string",
                    "nodeType": "ElementaryTypeName",
                    "src": "1610:6:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_string_storage_ptr",
                      "typeString": "string"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20401,
                  "mutability": "mutable",
                  "name": "_decimals",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1633:15:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint8",
                    "typeString": "uint8"
                  },
                  "typeName": {
                    "id": 20400,
                    "name": "uint8",
                    "nodeType": "ElementaryTypeName",
                    "src": "1633:5:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint8",
                      "typeString": "uint8"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20403,
                  "mutability": "mutable",
                  "name": "_totalSupply",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20452,
                  "src": "1650:20:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20402,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "1650:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "1588:83:48"
            },
            "returnParameters": {
              "id": 20405,
              "nodeType": "ParameterList",
              "parameters": [],
              "src": "1679:0:48"
            },
            "scope": 20617,
            "src": "1577:434:48",
            "stateMutability": "nonpayable",
            "virtual": false,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21441
            ],
            "body": {
              "id": 20499,
              "nodeType": "Block",
              "src": "2497:201:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20477,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20466,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "2508:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20469,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20467,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "2518:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20468,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "2518:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "2508:21:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20475,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20457,
                          "src": "2558:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20470,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "2532:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20473,
                          "indexExpression": {
                            "argumentTypes": null,
                            "expression": {
                              "argumentTypes": null,
                              "id": 20471,
                              "name": "msg",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": -15,
                              "src": "2542:3:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_magic_message",
                                "typeString": "msg"
                              }
                            },
                            "id": 20472,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "lValueRequested": false,
                            "memberName": "sender",
                            "nodeType": "MemberAccess",
                            "referencedDeclaration": null,
                            "src": "2542:10:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address_payable",
                              "typeString": "address payable"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "2532:21:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20474,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "2532:25:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20476,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "2532:33:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "2508:57:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20478,
                  "nodeType": "ExpressionStatement",
                  "src": "2508:57:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20488,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20479,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "2576:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20481,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20480,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20455,
                        "src": "2586:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "2576:14:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20486,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20457,
                          "src": "2612:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20482,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "2593:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20484,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20483,
                            "name": "_to",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20455,
                            "src": "2603:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "2593:14:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20485,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "add",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22606,
                        "src": "2593:18:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20487,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "2593:26:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "2576:43:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20489,
                  "nodeType": "ExpressionStatement",
                  "src": "2576:43:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20491,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "2644:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20492,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "2644:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20493,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20455,
                        "src": "2656:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20494,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20457,
                        "src": "2661:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20490,
                      "name": "Transfer",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20385,
                      "src": "2635:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20495,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "2635:33:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20496,
                  "nodeType": "EmitStatement",
                  "src": "2630:38:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20497,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "2686:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20465,
                  "id": 20498,
                  "nodeType": "Return",
                  "src": "2679:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20453,
              "nodeType": "StructuredDocumentation",
              "src": "2019:318:48",
              "text": " @dev transfers tokens to a given address\n throws on any error rather then return a false flag to minimize user errors\n @param _to      target address\n @param _value   transfer amount\n @return true if the transfer was successful, false if it wasn't"
            },
            "functionSelector": "a9059cbb",
            "id": 20500,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20461,
                    "name": "_to",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20455,
                    "src": "2463:3:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20462,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20460,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "2450:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "2450:17:48"
              }
            ],
            "name": "transfer",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20459,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "2432:8:48"
            },
            "parameters": {
              "id": 20458,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20455,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2361:11:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20454,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "2361:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20457,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2374:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20456,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "2374:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "2360:29:48"
            },
            "returnParameters": {
              "id": 20465,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20464,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20500,
                  "src": "2486:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20463,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "2486:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "2485:6:48"
            },
            "scope": 20617,
            "src": "2343:355:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21452
            ],
            "body": {
              "id": 20566,
              "nodeType": "Block",
              "src": "3301:268:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20534,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "baseExpression": {
                          "argumentTypes": null,
                          "id": 20519,
                          "name": "allowance",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20376,
                          "src": "3312:9:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                            "typeString": "mapping(address => mapping(address => uint256))"
                          }
                        },
                        "id": 20523,
                        "indexExpression": {
                          "argumentTypes": null,
                          "id": 20520,
                          "name": "_from",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20503,
                          "src": "3322:5:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_address",
                            "typeString": "address"
                          }
                        },
                        "isConstant": false,
                        "isLValue": true,
                        "isPure": false,
                        "lValueRequested": false,
                        "nodeType": "IndexAccess",
                        "src": "3312:16:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20524,
                      "indexExpression": {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20521,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "3329:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20522,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "3329:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3312:28:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20532,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3376:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "baseExpression": {
                              "argumentTypes": null,
                              "id": 20525,
                              "name": "allowance",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20376,
                              "src": "3343:9:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                                "typeString": "mapping(address => mapping(address => uint256))"
                              }
                            },
                            "id": 20527,
                            "indexExpression": {
                              "argumentTypes": null,
                              "id": 20526,
                              "name": "_from",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20503,
                              "src": "3353:5:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
                              }
                            },
                            "isConstant": false,
                            "isLValue": true,
                            "isPure": false,
                            "lValueRequested": false,
                            "nodeType": "IndexAccess",
                            "src": "3343:16:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20530,
                          "indexExpression": {
                            "argumentTypes": null,
                            "expression": {
                              "argumentTypes": null,
                              "id": 20528,
                              "name": "msg",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": -15,
                              "src": "3360:3:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_magic_message",
                                "typeString": "msg"
                              }
                            },
                            "id": 20529,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": false,
                            "lValueRequested": false,
                            "memberName": "sender",
                            "nodeType": "MemberAccess",
                            "referencedDeclaration": null,
                            "src": "3360:10:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address_payable",
                              "typeString": "address payable"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3343:28:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20531,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "3343:32:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20533,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3343:40:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3312:71:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20535,
                  "nodeType": "ExpressionStatement",
                  "src": "3312:71:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20545,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20536,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "3394:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20538,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20537,
                        "name": "_from",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20503,
                        "src": "3404:5:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3394:16:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20543,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3434:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20539,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "3413:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20541,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20540,
                            "name": "_from",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20503,
                            "src": "3423:5:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3413:16:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20542,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sub",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22628,
                        "src": "3413:20:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20544,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3413:28:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3394:47:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20546,
                  "nodeType": "ExpressionStatement",
                  "src": "3394:47:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20556,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "id": 20547,
                        "name": "balanceOf",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20369,
                        "src": "3452:9:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20549,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20548,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20505,
                        "src": "3462:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "3452:14:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "arguments": [
                        {
                          "argumentTypes": null,
                          "id": 20554,
                          "name": "_value",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20507,
                          "src": "3488:6:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        }
                      ],
                      "expression": {
                        "argumentTypes": [
                          {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        ],
                        "expression": {
                          "argumentTypes": null,
                          "baseExpression": {
                            "argumentTypes": null,
                            "id": 20550,
                            "name": "balanceOf",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20369,
                            "src": "3469:9:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                              "typeString": "mapping(address => uint256)"
                            }
                          },
                          "id": 20552,
                          "indexExpression": {
                            "argumentTypes": null,
                            "id": 20551,
                            "name": "_to",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20505,
                            "src": "3479:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_address",
                              "typeString": "address"
                            }
                          },
                          "isConstant": false,
                          "isLValue": true,
                          "isPure": false,
                          "lValueRequested": false,
                          "nodeType": "IndexAccess",
                          "src": "3469:14:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          }
                        },
                        "id": 20553,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "add",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": 22606,
                        "src": "3469:18:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
                          "typeString": "function (uint256,uint256) pure returns (uint256)"
                        }
                      },
                      "id": 20555,
                      "isConstant": false,
                      "isLValue": false,
                      "isPure": false,
                      "kind": "functionCall",
                      "lValueRequested": false,
                      "names": [],
                      "nodeType": "FunctionCall",
                      "src": "3469:26:48",
                      "tryCall": false,
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "3452:43:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20557,
                  "nodeType": "ExpressionStatement",
                  "src": "3452:43:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "id": 20559,
                        "name": "_from",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20503,
                        "src": "3520:5:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20560,
                        "name": "_to",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20505,
                        "src": "3527:3:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20561,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20507,
                        "src": "3532:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20558,
                      "name": "Transfer",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20385,
                      "src": "3511:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20562,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "3511:28:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20563,
                  "nodeType": "EmitStatement",
                  "src": "3506:33:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20564,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "3557:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20518,
                  "id": 20565,
                  "nodeType": "Return",
                  "src": "3550:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20501,
              "nodeType": "StructuredDocumentation",
              "src": "2706:387:48",
              "text": " @dev transfers tokens to a given address on behalf of another address\n throws on any error rather then return a false flag to minimize user errors\n @param _from    source address\n @param _to      target address\n @param _value   transfer amount\n @return true if the transfer was successful, false if it wasn't"
            },
            "functionSelector": "23b872dd",
            "id": 20567,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20511,
                    "name": "_from",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20503,
                    "src": "3238:5:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20512,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20510,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "3225:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "3225:19:48"
              },
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20514,
                    "name": "_to",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20505,
                    "src": "3267:3:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20515,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20513,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "3254:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "3254:17:48"
              }
            ],
            "name": "transferFrom",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20509,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "3207:8:48"
            },
            "parameters": {
              "id": 20508,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20503,
                  "mutability": "mutable",
                  "name": "_from",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3121:13:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20502,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "3121:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20505,
                  "mutability": "mutable",
                  "name": "_to",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3136:11:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20504,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "3136:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20507,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3149:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20506,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "3149:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "3120:44:48"
            },
            "returnParameters": {
              "id": 20518,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20517,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20567,
                  "src": "3290:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20516,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "3290:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "3289:6:48"
            },
            "scope": 20617,
            "src": "3099:470:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          },
          {
            "baseFunctions": [
              21461
            ],
            "body": {
              "id": 20615,
              "nodeType": "Block",
              "src": "4447:356:48",
              "statements": [
                {
                  "expression": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "commonType": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        "id": 20593,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "leftExpression": {
                          "argumentTypes": null,
                          "commonType": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          },
                          "id": 20584,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "leftExpression": {
                            "argumentTypes": null,
                            "id": 20582,
                            "name": "_value",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": 20572,
                            "src": "4592:6:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_uint256",
                              "typeString": "uint256"
                            }
                          },
                          "nodeType": "BinaryOperation",
                          "operator": "==",
                          "rightExpression": {
                            "argumentTypes": null,
                            "hexValue": "30",
                            "id": 20583,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": true,
                            "kind": "number",
                            "lValueRequested": false,
                            "nodeType": "Literal",
                            "src": "4602:1:48",
                            "subdenomination": null,
                            "typeDescriptions": {
                              "typeIdentifier": "t_rational_0_by_1",
                              "typeString": "int_const 0"
                            },
                            "value": "0"
                          },
                          "src": "4592:11:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_bool",
                            "typeString": "bool"
                          }
                        },
                        "nodeType": "BinaryOperation",
                        "operator": "||",
                        "rightExpression": {
                          "argumentTypes": null,
                          "commonType": {
                            "typeIdentifier": "t_uint256",
                            "typeString": "uint256"
                          },
                          "id": 20592,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "leftExpression": {
                            "argumentTypes": null,
                            "baseExpression": {
                              "argumentTypes": null,
                              "baseExpression": {
                                "argumentTypes": null,
                                "id": 20585,
                                "name": "allowance",
                                "nodeType": "Identifier",
                                "overloadedDeclarations": [],
                                "referencedDeclaration": 20376,
                                "src": "4607:9:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                                  "typeString": "mapping(address => mapping(address => uint256))"
                                }
                              },
                              "id": 20588,
                              "indexExpression": {
                                "argumentTypes": null,
                                "expression": {
                                  "argumentTypes": null,
                                  "id": 20586,
                                  "name": "msg",
                                  "nodeType": "Identifier",
                                  "overloadedDeclarations": [],
                                  "referencedDeclaration": -15,
                                  "src": "4617:3:48",
                                  "typeDescriptions": {
                                    "typeIdentifier": "t_magic_message",
                                    "typeString": "msg"
                                  }
                                },
                                "id": 20587,
                                "isConstant": false,
                                "isLValue": false,
                                "isPure": false,
                                "lValueRequested": false,
                                "memberName": "sender",
                                "nodeType": "MemberAccess",
                                "referencedDeclaration": null,
                                "src": "4617:10:48",
                                "typeDescriptions": {
                                  "typeIdentifier": "t_address_payable",
                                  "typeString": "address payable"
                                }
                              },
                              "isConstant": false,
                              "isLValue": true,
                              "isPure": false,
                              "lValueRequested": false,
                              "nodeType": "IndexAccess",
                              "src": "4607:21:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                                "typeString": "mapping(address => uint256)"
                              }
                            },
                            "id": 20590,
                            "indexExpression": {
                              "argumentTypes": null,
                              "id": 20589,
                              "name": "_spender",
                              "nodeType": "Identifier",
                              "overloadedDeclarations": [],
                              "referencedDeclaration": 20570,
                              "src": "4629:8:48",
                              "typeDescriptions": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
                              }
                            },
                            "isConstant": false,
                            "isLValue": true,
                            "isPure": false,
                            "lValueRequested": false,
                            "nodeType": "IndexAccess",
                            "src": "4607:31:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_uint256",
                              "typeString": "uint256"
                            }
                          },
                          "nodeType": "BinaryOperation",
                          "operator": "==",
                          "rightExpression": {
                            "argumentTypes": null,
                            "hexValue": "30",
                            "id": 20591,
                            "isConstant": false,
                            "isLValue": false,
                            "isPure": true,
                            "kind": "number",
                            "lValueRequested": false,
                            "nodeType": "Literal",
                            "src": "4642:1:48",
                            "subdenomination": null,
                            "typeDescriptions": {
                              "typeIdentifier": "t_rational_0_by_1",
                              "typeString": "int_const 0"
                            },
                            "value": "0"
                          },
                          "src": "4607:36:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_bool",
                            "typeString": "bool"
                          }
                        },
                        "src": "4592:51:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "hexValue": "4552525f494e56414c49445f414d4f554e54",
                        "id": 20594,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": true,
                        "kind": "string",
                        "lValueRequested": false,
                        "nodeType": "Literal",
                        "src": "4645:20:48",
                        "subdenomination": null,
                        "typeDescriptions": {
                          "typeIdentifier": "t_stringliteral_c44007bfe4e704be0ed1393660a827b4f88825f4b6fe1bc10cd38fc3fcb7d839",
                          "typeString": "literal_string \"ERR_INVALID_AMOUNT\""
                        },
                        "value": "ERR_INVALID_AMOUNT"
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_bool",
                          "typeString": "bool"
                        },
                        {
                          "typeIdentifier": "t_stringliteral_c44007bfe4e704be0ed1393660a827b4f88825f4b6fe1bc10cd38fc3fcb7d839",
                          "typeString": "literal_string \"ERR_INVALID_AMOUNT\""
                        }
                      ],
                      "id": 20581,
                      "name": "require",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [
                        -18,
                        -18
                      ],
                      "referencedDeclaration": -18,
                      "src": "4584:7:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$",
                        "typeString": "function (bool,string memory) pure"
                      }
                    },
                    "id": 20595,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "4584:82:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20596,
                  "nodeType": "ExpressionStatement",
                  "src": "4584:82:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "id": 20604,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "lValueRequested": false,
                    "leftHandSide": {
                      "argumentTypes": null,
                      "baseExpression": {
                        "argumentTypes": null,
                        "baseExpression": {
                          "argumentTypes": null,
                          "id": 20597,
                          "name": "allowance",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": 20376,
                          "src": "4679:9:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
                            "typeString": "mapping(address => mapping(address => uint256))"
                          }
                        },
                        "id": 20601,
                        "indexExpression": {
                          "argumentTypes": null,
                          "expression": {
                            "argumentTypes": null,
                            "id": 20598,
                            "name": "msg",
                            "nodeType": "Identifier",
                            "overloadedDeclarations": [],
                            "referencedDeclaration": -15,
                            "src": "4689:3:48",
                            "typeDescriptions": {
                              "typeIdentifier": "t_magic_message",
                              "typeString": "msg"
                            }
                          },
                          "id": 20599,
                          "isConstant": false,
                          "isLValue": false,
                          "isPure": false,
                          "lValueRequested": false,
                          "memberName": "sender",
                          "nodeType": "MemberAccess",
                          "referencedDeclaration": null,
                          "src": "4689:10:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_address_payable",
                            "typeString": "address payable"
                          }
                        },
                        "isConstant": false,
                        "isLValue": true,
                        "isPure": false,
                        "lValueRequested": false,
                        "nodeType": "IndexAccess",
                        "src": "4679:21:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
                          "typeString": "mapping(address => uint256)"
                        }
                      },
                      "id": 20602,
                      "indexExpression": {
                        "argumentTypes": null,
                        "id": 20600,
                        "name": "_spender",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20570,
                        "src": "4701:8:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      "isConstant": false,
                      "isLValue": true,
                      "isPure": false,
                      "lValueRequested": true,
                      "nodeType": "IndexAccess",
                      "src": "4679:31:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "nodeType": "Assignment",
                    "operator": "=",
                    "rightHandSide": {
                      "argumentTypes": null,
                      "id": 20603,
                      "name": "_value",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20572,
                      "src": "4713:6:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_uint256",
                        "typeString": "uint256"
                      }
                    },
                    "src": "4679:40:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "id": 20605,
                  "nodeType": "ExpressionStatement",
                  "src": "4679:40:48"
                },
                {
                  "eventCall": {
                    "argumentTypes": null,
                    "arguments": [
                      {
                        "argumentTypes": null,
                        "expression": {
                          "argumentTypes": null,
                          "id": 20607,
                          "name": "msg",
                          "nodeType": "Identifier",
                          "overloadedDeclarations": [],
                          "referencedDeclaration": -15,
                          "src": "4744:3:48",
                          "typeDescriptions": {
                            "typeIdentifier": "t_magic_message",
                            "typeString": "msg"
                          }
                        },
                        "id": 20608,
                        "isConstant": false,
                        "isLValue": false,
                        "isPure": false,
                        "lValueRequested": false,
                        "memberName": "sender",
                        "nodeType": "MemberAccess",
                        "referencedDeclaration": null,
                        "src": "4744:10:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20609,
                        "name": "_spender",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20570,
                        "src": "4756:8:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        }
                      },
                      {
                        "argumentTypes": null,
                        "id": 20610,
                        "name": "_value",
                        "nodeType": "Identifier",
                        "overloadedDeclarations": [],
                        "referencedDeclaration": 20572,
                        "src": "4766:6:48",
                        "typeDescriptions": {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      }
                    ],
                    "expression": {
                      "argumentTypes": [
                        {
                          "typeIdentifier": "t_address_payable",
                          "typeString": "address payable"
                        },
                        {
                          "typeIdentifier": "t_address",
                          "typeString": "address"
                        },
                        {
                          "typeIdentifier": "t_uint256",
                          "typeString": "uint256"
                        }
                      ],
                      "id": 20606,
                      "name": "Approval",
                      "nodeType": "Identifier",
                      "overloadedDeclarations": [],
                      "referencedDeclaration": 20394,
                      "src": "4735:8:48",
                      "typeDescriptions": {
                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
                        "typeString": "function (address,address,uint256)"
                      }
                    },
                    "id": 20611,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": false,
                    "kind": "functionCall",
                    "lValueRequested": false,
                    "names": [],
                    "nodeType": "FunctionCall",
                    "src": "4735:38:48",
                    "tryCall": false,
                    "typeDescriptions": {
                      "typeIdentifier": "t_tuple$__$",
                      "typeString": "tuple()"
                    }
                  },
                  "id": 20612,
                  "nodeType": "EmitStatement",
                  "src": "4730:43:48"
                },
                {
                  "expression": {
                    "argumentTypes": null,
                    "hexValue": "74727565",
                    "id": 20613,
                    "isConstant": false,
                    "isLValue": false,
                    "isPure": true,
                    "kind": "bool",
                    "lValueRequested": false,
                    "nodeType": "Literal",
                    "src": "4791:4:48",
                    "subdenomination": null,
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    },
                    "value": "true"
                  },
                  "functionReturnParameters": 20580,
                  "id": 20614,
                  "nodeType": "Return",
                  "src": "4784:11:48"
                }
              ]
            },
            "documentation": {
              "id": 20568,
              "nodeType": "StructuredDocumentation",
              "src": "3577:701:48",
              "text": " @dev allows another account/contract to transfers tokens on behalf of the caller\n throws on any error rather then return a false flag to minimize user errors\n also, to minimize the risk of the approve/transferFrom attack vector\n (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice\n in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value\n @param _spender approved address\n @param _value   allowance amount\n @return true if the approval was successful, false if it wasn't"
            },
            "functionSelector": "095ea7b3",
            "id": 20616,
            "implemented": true,
            "kind": "function",
            "modifiers": [
              {
                "arguments": [
                  {
                    "argumentTypes": null,
                    "id": 20576,
                    "name": "_spender",
                    "nodeType": "Identifier",
                    "overloadedDeclarations": [],
                    "referencedDeclaration": 20570,
                    "src": "4408:8:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  }
                ],
                "id": 20577,
                "modifierName": {
                  "argumentTypes": null,
                  "id": 20575,
                  "name": "validAddress",
                  "nodeType": "Identifier",
                  "overloadedDeclarations": [],
                  "referencedDeclaration": 22953,
                  "src": "4395:12:48",
                  "typeDescriptions": {
                    "typeIdentifier": "t_modifier$_t_address_$",
                    "typeString": "modifier (address)"
                  }
                },
                "nodeType": "ModifierInvocation",
                "src": "4395:22:48"
              }
            ],
            "name": "approve",
            "nodeType": "FunctionDefinition",
            "overrides": {
              "id": 20574,
              "nodeType": "OverrideSpecifier",
              "overrides": [],
              "src": "4377:8:48"
            },
            "parameters": {
              "id": 20573,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20570,
                  "mutability": "mutable",
                  "name": "_spender",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4301:16:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_address",
                    "typeString": "address"
                  },
                  "typeName": {
                    "id": 20569,
                    "name": "address",
                    "nodeType": "ElementaryTypeName",
                    "src": "4301:7:48",
                    "stateMutability": "nonpayable",
                    "typeDescriptions": {
                      "typeIdentifier": "t_address",
                      "typeString": "address"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                },
                {
                  "constant": false,
                  "id": 20572,
                  "mutability": "mutable",
                  "name": "_value",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4319:14:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_uint256",
                    "typeString": "uint256"
                  },
                  "typeName": {
                    "id": 20571,
                    "name": "uint256",
                    "nodeType": "ElementaryTypeName",
                    "src": "4319:7:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_uint256",
                      "typeString": "uint256"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "4300:34:48"
            },
            "returnParameters": {
              "id": 20580,
              "nodeType": "ParameterList",
              "parameters": [
                {
                  "constant": false,
                  "id": 20579,
                  "mutability": "mutable",
                  "name": "",
                  "nodeType": "VariableDeclaration",
                  "overrides": null,
                  "scope": 20616,
                  "src": "4436:4:48",
                  "stateVariable": false,
                  "storageLocation": "default",
                  "typeDescriptions": {
                    "typeIdentifier": "t_bool",
                    "typeString": "bool"
                  },
                  "typeName": {
                    "id": 20578,
                    "name": "bool",
                    "nodeType": "ElementaryTypeName",
                    "src": "4436:4:48",
                    "typeDescriptions": {
                      "typeIdentifier": "t_bool",
                      "typeString": "bool"
                    }
                  },
                  "value": null,
                  "visibility": "internal"
                }
              ],
              "src": "4435:6:48"
            },
            "scope": 20617,
            "src": "4284:519:48",
            "stateMutability": "nonpayable",
            "virtual": true,
            "visibility": "public"
          }
        ],
        "scope": 20618,
        "src": "241:4565:48"
      }
    ],
    "src": "52:4756:48"
  },
  "compiler": {
    "name": "solc",
    "version": "0.6.12+commit.27d51765.Emscripten.clang"
  },
  "networks": {},
  "schemaVersion": "3.2.3",
  "updatedAt": "2020-11-10T14:20:44.727Z",
  "networkType": "ethereum",
  "devdoc": {
    "details": "ERC20 Standard Token implementation",
    "events": {
      "Approval(address,address,uint256)": {
        "details": "triggered when a wallet allows another wallet to transfer tokens from on its behalf",
        "params": {
          "_owner": "wallet that approves the allowance",
          "_spender": "wallet that receives the allowance",
          "_value": "allowance amount"
        }
      },
      "Transfer(address,address,uint256)": {
        "details": "triggered when tokens are transferred between wallets",
        "params": {
          "_from": "source address",
          "_to": "target address",
          "_value": "transfer amount"
        }
      }
    },
    "kind": "dev",
    "methods": {
      "approve(address,uint256)": {
        "details": "allows another account/contract to transfers tokens on behalf of the caller throws on any error rather then return a false flag to minimize user errors also, to minimize the risk of the approve/transferFrom attack vector (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value",
        "params": {
          "_spender": "approved address",
          "_value": "allowance amount"
        },
        "returns": {
          "_0": "true if the approval was successful, false if it wasn't"
        }
      },
      "constructor": {
        "details": "initializes a new ERC20Token instance",
        "params": {
          "_decimals": "decimal points, for display purposes",
          "_name": "token name",
          "_symbol": "token symbol",
          "_totalSupply": "total supply of token units"
        }
      },
      "transfer(address,uint256)": {
        "details": "transfers tokens to a given address throws on any error rather then return a false flag to minimize user errors",
        "params": {
          "_to": "target address",
          "_value": "transfer amount"
        },
        "returns": {
          "_0": "true if the transfer was successful, false if it wasn't"
        }
      },
      "transferFrom(address,address,uint256)": {
        "details": "transfers tokens to a given address on behalf of another address throws on any error rather then return a false flag to minimize user errors",
        "params": {
          "_from": "source address",
          "_to": "target address",
          "_value": "transfer amount"
        },
        "returns": {
          "_0": "true if the transfer was successful, false if it wasn't"
        }
      }
    },
    "version": 1
  },
  "userdoc": {
    "kind": "user",
    "methods": {},
    "version": 1
  }
}