{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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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\",\"_initialSupply\":\"total supply of token units\",\"_name\":\"token name\",\"_symbol\":\"token symbol\"}},\"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}},\"settings\":{\"compilationTarget\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/GiftableToken.sol\":\"GiftableToken\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/GiftableToken.sol\":{\"keccak256\":\"0x0d4d8909d3720b29564992be7d8438d920407d801d8c0775e9556f556279b0be\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://a63d9486f37b7c5b31b517fb3322c0858a2e69f28338f0253497d48ffb0e17a4\",\"dweb:/ipfs/QmWNig4757rhjS4yKSqezvm85TYtSS7gfGnh1oBFaKTpTu\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/interfaces/IERC20Token.sol\":{\"keccak256\":\"0xe6f988c3156e88258474526a541d5a42b6a9adae98b04177a059d9f723bc82cd\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://9a6eb77a5b9ce70995a11a6e48ac3985a4c70896fe5fe04d46146ad7c1c83ea3\",\"dweb:/ipfs/QmYvGSveZFG51tghwkVuu6eK9Jy8frHpfLxHTMyvNZN461\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/SafeMath.sol\":{\"keccak256\":\"0x1ab7391a19ca8a3ad2f3c4a1074e080d4d76dfdb834637bdd0c1e6b6acdf28af\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://d6d8c99621ca884b72da2d84eddfec8ec8c5533915691d6eec94a07adf445608\",\"dweb:/ipfs/QmaXr6DN7VbfxfMn3PsTy7SAMgZVVXbdeaw11BsAjVL2x1\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/Utils.sol\":{\"keccak256\":\"0x073efa69fcd6b5e60f841b28b366d63b62ff48ab12a06ce3f5a7f41afd6ce885\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://e8b8ecb2d29197ca77f0ed98f728ace54e6edcfdf5cd1194ae22701607eaf608\",\"dweb:/ipfs/QmcsR6Q35Hurh3TrPkYAboicz9bQQoGCWmZLzUCDyhotH8\"]}},\"version\":1}",
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"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 * This is a MOCK token used for DEVELOPMENT PURPOSES ONLY.\r\n *\r\n * @dev ERC20 Standard Token implementation\r\n*/\r\ncontract GiftableToken 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 event ChangedSupply(uint256 _oldTotal, uint256 _newTotal);\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 _initialSupply total supply of token units\r\n */\r\n constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _initialSupply) 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 = _initialSupply;\r\n balanceOf[msg.sender] = _initialSupply;\r\n }\r\n\r\n function gift(address _to, uint256 _value) \r\n\tpublic\r\n\tvirtual\r\n\tvalidAddress(_to)\r\n\treturns (bool)\r\n {\r\n\ttotalSupply = totalSupply + _value;\r\n\tuint256 oldSupply = balanceOf[_to];\r\n\tbalanceOf[_to] = balanceOf[_to] + _value;\r\n\temit ChangedSupply(oldSupply, balanceOf[_to]);\r\n\temit Transfer(address(0x00), _to, _value);\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 * (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice\r\n * in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value\r\n *\r\n * @param _spender approved address\r\n * @param _value allowance amount\r\n *\r\n * @return true if the approval was successful, false if it wasn't\r\n */\r\n function approve(address _spender, uint256 _value)\r\n public\r\n virtual\r\n override\r\n validAddress(_spender)\r\n returns (bool)\r\n {\r\n // if the allowance isn't 0, it can only be updated to 0 to prevent an allowance change immediately after withdrawal\r\n require(_value == 0 || allowance[msg.sender][_spender] == 0, \"ERR_INVALID_AMOUNT\");\r\n\r\n allowance[msg.sender][_spender] = _value;\r\n emit Approval(msg.sender, _spender, _value);\r\n return true;\r\n }\r\n}\r\n",
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],
"name": "Transfer",
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},
"links": {},
"address": "0xf31c222514B2CE1942A9FA6c520Ca7f2010Ee02c",
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{
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"links": {},
"address": "0x691073f906c9d3B310a1794019FD2B400fEaf066",
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"links": {},
"address": "0x77d44866C0D23C093C22f8BBAbE58c8bb3901056",
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{
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"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
"anonymous": false,
"inputs": [
{
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"internalType": "address",
"name": "_from",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_to",
"type": "address"
},
{
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"name": "_value",
"type": "uint256"
}
],
"name": "Transfer",
"type": "event"
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},
"links": {},
"address": "0x9a355cAc652e473E31673Af852D31946B83Af60A",
"transactionHash": "0xd380af58b57596ba08c775d7d333862779a3e0e3f897626c6c22838f194f76e4"
}
},
"schemaVersion": "3.2.3",
"updatedAt": "2020-11-10T14:20:44.724Z",
"networkType": "ethereum",
"devdoc": {
"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",
"_initialSupply": "total supply of token units",
"_name": "token name",
"_symbol": "token symbol"
}
},
"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
}
}