{
  "contractName": "BancorNetwork",
  "abi": [
    {
      "inputs": [
        {
          "internalType": "contract IContractRegistry",
          "name": "_registry",
          "type": "address"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "contract IConverterAnchor",
          "name": "_smartToken",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "contract IERC20Token",
          "name": "_fromToken",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "contract IERC20Token",
          "name": "_toToken",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "_fromAmount",
          "type": "uint256"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "_toAmount",
          "type": "uint256"
        },
        {
          "indexed": false,
          "internalType": "address",
          "name": "_trader",
          "type": "address"
        }
      ],
      "name": "Conversion",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "_prevOwner",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "_newOwner",
          "type": "address"
        }
      ],
      "name": "OwnerUpdate",
      "type": "event"
    },
    {
      "inputs": [],
      "name": "acceptOwnership",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "contract IERC20Token",
          "name": "",
          "type": "address"
        }
      ],
      "name": "etherTokens",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "maxAffiliateFee",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "newOwner",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "onlyOwnerCanUpdateRegistry",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "owner",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "prevRegistry",
      "outputs": [
        {
          "internalType": "contract IContractRegistry",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "registry",
      "outputs": [
        {
          "internalType": "contract IContractRegistry",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [],
      "name": "restoreRegistry",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "bool",
          "name": "_onlyOwnerCanUpdateRegistry",
          "type": "bool"
        }
      ],
      "name": "restrictRegistryUpdate",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_newOwner",
          "type": "address"
        }
      ],
      "name": "transferOwnership",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "updateRegistry",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "contract IERC20Token",
          "name": "_token",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "_to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        }
      ],
      "name": "withdrawTokens",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "_maxAffiliateFee",
          "type": "uint256"
        }
      ],
      "name": "setMaxAffiliateFee",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "contract IEtherToken",
          "name": "_token",
          "type": "address"
        },
        {
          "internalType": "bool",
          "name": "_register",
          "type": "bool"
        }
      ],
      "name": "registerEtherToken",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "contract IERC20Token",
          "name": "_sourceToken",
          "type": "address"
        },
        {
          "internalType": "contract IERC20Token",
          "name": "_targetToken",
          "type": "address"
        }
      ],
      "name": "conversionPath",
      "outputs": [
        {
          "internalType": "address[]",
          "name": "",
          "type": "address[]"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        }
      ],
      "name": "rateByPath",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "convertByPath",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "bytes32",
          "name": "_targetBlockchain",
          "type": "bytes32"
        },
        {
          "internalType": "bytes32",
          "name": "_targetAccount",
          "type": "bytes32"
        },
        {
          "internalType": "uint256",
          "name": "_conversionId",
          "type": "uint256"
        }
      ],
      "name": "xConvert",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "bytes32",
          "name": "_targetBlockchain",
          "type": "bytes32"
        },
        {
          "internalType": "bytes32",
          "name": "_targetAccount",
          "type": "bytes32"
        },
        {
          "internalType": "uint256",
          "name": "_conversionId",
          "type": "uint256"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "xConvert2",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "contract IBancorX",
          "name": "_bancorX",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_conversionId",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        }
      ],
      "name": "completeXConversion",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        }
      ],
      "name": "getReturnByPath",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function",
      "constant": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        }
      ],
      "name": "convert",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "convert2",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        }
      ],
      "name": "convertFor",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "convertFor2",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "payable",
      "type": "function",
      "payable": true
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        }
      ],
      "name": "claimAndConvert",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "claimAndConvert2",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        }
      ],
      "name": "claimAndConvertFor",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "_path",
          "type": "address[]"
        },
        {
          "internalType": "uint256",
          "name": "_amount",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "_minReturn",
          "type": "uint256"
        },
        {
          "internalType": "address payable",
          "name": "_beneficiary",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "_affiliateAccount",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_affiliateFee",
          "type": "uint256"
        }
      ],
      "name": "claimAndConvertFor2",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ],
  "metadata": "{\"compiler\":{\"version\":\"0.6.12+commit.27d51765\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"contract IContractRegistry\",\"name\":\"_registry\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"contract IConverterAnchor\",\"name\":\"_smartToken\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"contract IERC20Token\",\"name\":\"_fromToken\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"contract IERC20Token\",\"name\":\"_toToken\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_fromAmount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_toAmount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_trader\",\"type\":\"address\"}],\"name\":\"Conversion\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_prevOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"_newOwner\",\"type\":\"address\"}],\"name\":\"OwnerUpdate\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"}],\"name\":\"claimAndConvert\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"claimAndConvert2\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"}],\"name\":\"claimAndConvertFor\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"claimAndConvertFor2\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"contract IBancorX\",\"name\":\"_bancorX\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_conversionId\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"}],\"name\":\"completeXConversion\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contract IERC20Token\",\"name\":\"_sourceToken\",\"type\":\"address\"},{\"internalType\":\"contract IERC20Token\",\"name\":\"_targetToken\",\"type\":\"address\"}],\"name\":\"conversionPath\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"}],\"name\":\"convert\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"convert2\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"convertByPath\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"}],\"name\":\"convertFor\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"address payable\",\"name\":\"_beneficiary\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"convertFor2\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contract IERC20Token\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"etherTokens\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"getReturnByPath\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"maxAffiliateFee\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"newOwner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"onlyOwnerCanUpdateRegistry\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"prevRegistry\",\"outputs\":[{\"internalType\":\"contract IContractRegistry\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"rateByPath\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contract IEtherToken\",\"name\":\"_token\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"_register\",\"type\":\"bool\"}],\"name\":\"registerEtherToken\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"registry\",\"outputs\":[{\"internalType\":\"contract IContractRegistry\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"restoreRegistry\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bool\",\"name\":\"_onlyOwnerCanUpdateRegistry\",\"type\":\"bool\"}],\"name\":\"restrictRegistryUpdate\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_maxAffiliateFee\",\"type\":\"uint256\"}],\"name\":\"setMaxAffiliateFee\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"updateRegistry\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contract IERC20Token\",\"name\":\"_token\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"withdrawTokens\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"_targetBlockchain\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"_targetAccount\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"_conversionId\",\"type\":\"uint256\"}],\"name\":\"xConvert\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_path\",\"type\":\"address[]\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_minReturn\",\"type\":\"uint256\"},{\"internalType\":\"bytes32\",\"name\":\"_targetBlockchain\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"_targetAccount\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"_conversionId\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_affiliateAccount\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_affiliateFee\",\"type\":\"uint256\"}],\"name\":\"xConvert2\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"payable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"The BancorNetwork contract is the main entry point for Bancor token conversions. It also allows for the conversion of any token in the Bancor Network to any other token in a single transaction by providing a conversion path. A note on Conversion Path: Conversion path is a data structure that is used when converting a token to another token in the Bancor Network, when the conversion cannot necessarily be done by a single converter and might require multiple 'hops'. The path defines which converters should be used and what kind of conversion should be done in each step. The path format doesn't include complex structure; instead, it is represented by a single array in which each 'hop' is represented by a 2-tuple - converter anchor & target token. In addition, the first element is always the source token. The converter anchor is only used as a pointer to a converter (since converter addresses are more likely to change as opposed to anchor addresses). Format: [source token, converter anchor, target token, converter anchor, target token...]\",\"events\":{\"Conversion(address,address,address,uint256,uint256,address)\":{\"details\":\"triggered when a conversion between two tokens occurs\",\"params\":{\"_fromAmount\":\"amount converted, in the source token\",\"_fromToken\":\"source ERC20 token\",\"_smartToken\":\"anchor governed by the converter\",\"_toAmount\":\"amount returned, minus conversion fee\",\"_toToken\":\"target ERC20 token\",\"_trader\":\"wallet that initiated the trade\"}}},\"kind\":\"dev\",\"methods\":{\"acceptOwnership()\":{\"details\":\"used by a new owner to accept an ownership transfer\"},\"claimAndConvert(address[],uint256,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"claimAndConvert2(address[],uint256,uint256,address,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"claimAndConvertFor(address[],uint256,uint256,address)\":{\"details\":\"deprecated, backward compatibility\"},\"claimAndConvertFor2(address[],uint256,uint256,address,address,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"completeXConversion(address[],address,uint256,uint256,address)\":{\"details\":\"allows a user to convert a token that was sent from another blockchain into any other token on the BancorNetwork ideally this transaction is created before the previous conversion is even complete, so so the input amount isn't known at that point - the amount is actually take from the BancorX contract directly by specifying the conversion id\",\"params\":{\"_bancorX\":\"address of the BancorX contract for the source token\",\"_beneficiary\":\"wallet to receive the conversion result\",\"_conversionId\":\"pre-determined unique (if non zero) id which refers to this conversion\",\"_minReturn\":\"if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero\",\"_path\":\"conversion path\"},\"returns\":{\"_0\":\"amount of tokens received from the conversion\"}},\"constructor\":{\"details\":\"initializes a new BancorNetwork instance\",\"params\":{\"_registry\":\"address of a contract registry contract\"}},\"conversionPath(address,address)\":{\"details\":\"returns the conversion path between two tokens in the network note that this method is quite expensive in terms of gas and should generally be called off-chain\",\"params\":{\"_sourceToken\":\"source token address\",\"_targetToken\":\"target token address\"},\"returns\":{\"_0\":\"conversion path between the two tokens\"}},\"convert(address[],uint256,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"convert2(address[],uint256,uint256,address,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"convertByPath(address[],uint256,uint256,address,address,uint256)\":{\"details\":\"converts the token to any other token in the bancor network by following a predefined conversion path and transfers the result tokens to a target account affiliate account/fee can also be passed in to receive a conversion fee (on top of the liquidity provider fees) note that the network should already have been given allowance of the source token (if not ETH)\",\"params\":{\"_affiliateAccount\":\"wallet address to receive the affiliate fee or 0x0 to disable affiliate fee\",\"_affiliateFee\":\"affiliate fee in PPM or 0 to disable affiliate fee\",\"_amount\":\"amount to convert from, in the source token\",\"_beneficiary\":\"account that will receive the conversion result or 0x0 to send the result to the sender account\",\"_minReturn\":\"if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\",\"_path\":\"conversion path, see conversion path format above\"},\"returns\":{\"_0\":\"amount of tokens received from the conversion\"}},\"convertFor(address[],uint256,uint256,address)\":{\"details\":\"deprecated, backward compatibility\"},\"convertFor2(address[],uint256,uint256,address,address,uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"getReturnByPath(address[],uint256)\":{\"details\":\"deprecated, backward compatibility\"},\"rateByPath(address[],uint256)\":{\"details\":\"returns the expected target amount of converting a given amount on a given path note that there is no support for circular paths\",\"params\":{\"_amount\":\"amount of _path[0] tokens received from the sender\",\"_path\":\"conversion path (see conversion path format above)\"},\"returns\":{\"_0\":\"expected target amount\"}},\"registerEtherToken(address,bool)\":{\"details\":\"allows the owner to register/unregister ether tokens\",\"params\":{\"_register\":\"true to register, false to unregister\",\"_token\":\"ether token contract address\"}},\"restoreRegistry()\":{\"details\":\"restores the previous contract-registry\"},\"restrictRegistryUpdate(bool)\":{\"details\":\"restricts the permission to update the contract-registry\",\"params\":{\"_onlyOwnerCanUpdateRegistry\":\"indicates whether or not permission is restricted to owner only\"}},\"setMaxAffiliateFee(uint256)\":{\"details\":\"allows the owner to update the maximum affiliate-fee\",\"params\":{\"_maxAffiliateFee\":\"maximum affiliate-fee\"}},\"transferOwnership(address)\":{\"details\":\"allows transferring the contract ownership the new owner still needs to accept the transfer can only be called by the contract owner\",\"params\":{\"_newOwner\":\"new contract owner\"}},\"updateRegistry()\":{\"details\":\"updates to the new contract-registry\"},\"withdrawTokens(address,address,uint256)\":{\"details\":\"withdraws tokens held by the contract and sends them to an account can only be called by the owner\",\"params\":{\"_amount\":\"amount to withdraw\",\"_to\":\"account to receive the new amount\",\"_token\":\"ERC20 token contract address\"}},\"xConvert(address[],uint256,uint256,bytes32,bytes32,uint256)\":{\"details\":\"converts any other token to BNT in the bancor network by following a predefined conversion path and transfers the result to an account on a different blockchain note that the network should already have been given allowance of the source token (if not ETH)\",\"params\":{\"_amount\":\"amount to convert from, in the source token\",\"_conversionId\":\"pre-determined unique (if non zero) id which refers to this transaction\",\"_minReturn\":\"if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\",\"_path\":\"conversion path, see conversion path format above\",\"_targetAccount\":\"address/account on the target blockchain to send the BNT to\",\"_targetBlockchain\":\"blockchain BNT will be issued on\"},\"returns\":{\"_0\":\"the amount of BNT received from this conversion\"}},\"xConvert2(address[],uint256,uint256,bytes32,bytes32,uint256,address,uint256)\":{\"details\":\"converts any other token to BNT in the bancor network by following a predefined conversion path and transfers the result to an account on a different blockchain note that the network should already have been given allowance of the source token (if not ETH)\",\"params\":{\"_affiliateAccount\":\"affiliate account\",\"_affiliateFee\":\"affiliate fee in PPM\",\"_amount\":\"amount to convert from, in the source token\",\"_conversionId\":\"pre-determined unique (if non zero) id which refers to this transaction\",\"_minReturn\":\"if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\",\"_path\":\"conversion path, see conversion path format above\",\"_targetAccount\":\"address/account on the target blockchain to send the BNT to\",\"_targetBlockchain\":\"blockchain BNT will be issued on\"},\"returns\":{\"_0\":\"the amount of BNT received from this conversion\"}}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/BancorNetwork.sol\":\"BancorNetwork\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/BancorNetwork.sol\":{\"keccak256\":\"0xb1817f3d45dd66177f17cf45f1b660186ee35575222a11c9bc0e0d44b32846ea\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://ce648a9b8038bb11d1ed091a16aa831a973ff2896ae9aae6b34cb9a8d0e02b00\",\"dweb:/ipfs/QmQKqVVXV6dDBd8saigyEALeLwjG8nhqK8wLRqDGaKSDV6\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/IConversionPathFinder.sol\":{\"keccak256\":\"0x2d0f5b57bc448581a6e2296486ca618851138f40928049d75220623605915d7b\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://2182eb05da8442792a5f3f4d8cdb2cf0bf9e952ca02638f3880cc59d5fd6dcb6\",\"dweb:/ipfs/QmSH9uWh6zTQkcBgD7VGGSzYW9DjdBDkUZUZ6zhzPWPPDz\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/bancorx/interfaces/IBancorX.sol\":{\"keccak256\":\"0x65b5780d710159c7540078c38406c53db37a349fb468a0bf21bdc6262e497951\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://3df931a12770d10a22451326e38ae9d405d3e2716bdbdd6306b5e2361f6fe511\",\"dweb:/ipfs/QmcRBSaFLz516dAEqb8ZEiyx8ZTHZZ6rfxHn5roL2fHA3S\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/converter/interfaces/IBancorFormula.sol\":{\"keccak256\":\"0xf30c95034af4c4ec6e8a859e90cf7a0bada29a805ede76e04644107a7c677c4e\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://b48070d4abf9c4a08c39e6c494fa9efd7389aa7f8b61b283c9ba02062b1c59b6\",\"dweb:/ipfs/Qme6U7SpspFPzMH2mTyKsXCnJEAgg1vX6NNFzuykbVSY5R\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/converter/interfaces/IConverter.sol\":{\"keccak256\":\"0x18b0d73a3d5ee951ede1b3f840ed35b40570e34975703079a4451555f4dd089b\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://1cd7263f1ef60793e3929509150420037df9a1194c3d0f40bb2ff5516d6a373f\",\"dweb:/ipfs/QmNUbsZt2rzWPjStYycgz3vMbNP4VrAqZPRAK39QNqUoos\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/converter/interfaces/IConverterAnchor.sol\":{\"keccak256\":\"0x9448cdbe90293fb5c1a0808b77af8754a1025b59c45f432eee01f659361a6115\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://1ef2bb2e1543c9324daf7f3fd086a57efb45b89f3d62b9d7a9fc78c138d24dbc\",\"dweb:/ipfs/QmVcXDib3K6xYJMBNxawmo4krJGiDfxb5oL64Lc3pi14XK\"]},\"/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/token/interfaces/IEtherToken.sol\":{\"keccak256\":\"0x6ed324da616d70af0b21fa073b1e5329b430e38b470177633a69710eff3da893\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://44f94aa59c67de636423cbdef82efb7d8e0562e73dfc9049a48054156aebaf14\",\"dweb:/ipfs/Qmdn8KAP54s7X3J6TCoZPhCpS19aCQzFYZuFABugJ5JA5D\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/interfaces/ISmartToken.sol\":{\"keccak256\":\"0x5cfc15e7a23a9872059b0cea4d2ae902c3fc074a39e1c645036ce38ad47881ec\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://890ee09d24de5778e34c4c27d1377d83d378e8f4a13fcb94d5102f61d4749cce\",\"dweb:/ipfs/QmT89f61fmsUN1BVdebKxUc5VU7sitiP33LNk7TTtF18oj\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/ContractRegistryClient.sol\":{\"keccak256\":\"0x74caf88eff1cb113ad8277df9ba7933a6f1e0deea8fd1855157def3be833b859\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://c7793c9f245736cd8413bc8c4b5c40b67949cbee32289a16d29c83cf59396ad6\",\"dweb:/ipfs/QmWony7b1buUrGnE32gjLAnSwkBYMrJ68vUcCwDMmp3MbJ\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/Owned.sol\":{\"keccak256\":\"0x6ef69d9dcc80a8a36d5eb37783375cd5e4831c6d20c723fa6f6b6a06c0aeb53d\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://5a5d087e2c5b47739615ef22e1f29749de44b43c9a37cfae32b3dfc498a258c4\",\"dweb:/ipfs/Qmd1mXKEQbmBxqHk326LGVzNoayXsam8gZNecknnYpBnyh\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/ReentrancyGuard.sol\":{\"keccak256\":\"0x5ea87c10dd6e7e79212da712eb5f079c03361e6c96e299a4ffd9aaee8d6a3899\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://882aac64a791df35a942480e6ce611d1acb399af4ac0c4ef0288965c3785bf50\",\"dweb:/ipfs/QmeWeYYFh5HZAzJ1SzPHoTcPvZrE4NPUVfmjvH9Q3m36Gg\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/SafeMath.sol\":{\"keccak256\":\"0x1ab7391a19ca8a3ad2f3c4a1074e080d4d76dfdb834637bdd0c1e6b6acdf28af\",\"license\":\"SEE LICENSE IN 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  "source": "// SPDX-License-Identifier: SEE LICENSE IN LICENSE\r\npragma solidity 0.6.12;\r\nimport \"./IConversionPathFinder.sol\";\r\nimport \"./converter/interfaces/IConverter.sol\";\r\nimport \"./converter/interfaces/IConverterAnchor.sol\";\r\nimport \"./converter/interfaces/IBancorFormula.sol\";\r\nimport \"./utility/ContractRegistryClient.sol\";\r\nimport \"./utility/ReentrancyGuard.sol\";\r\nimport \"./utility/TokenHolder.sol\";\r\nimport \"./utility/SafeMath.sol\";\r\nimport \"./token/interfaces/IEtherToken.sol\";\r\nimport \"./token/interfaces/ISmartToken.sol\";\r\nimport \"./bancorx/interfaces/IBancorX.sol\";\r\n\r\n// interface of older converters for backward compatibility\r\ninterface ILegacyConverter {\r\n    function change(IERC20Token _sourceToken, IERC20Token _targetToken, uint256 _amount, uint256 _minReturn) external returns (uint256);\r\n}\r\n\r\n/**\r\n  * @dev The BancorNetwork contract is the main entry point for Bancor token conversions.\r\n  * It also allows for the conversion of any token in the Bancor Network to any other token in a single\r\n  * transaction by providing a conversion path.\r\n  *\r\n  * A note on Conversion Path: Conversion path is a data structure that is used when converting a token\r\n  * to another token in the Bancor Network, when the conversion cannot necessarily be done by a single\r\n  * converter and might require multiple 'hops'.\r\n  * The path defines which converters should be used and what kind of conversion should be done in each step.\r\n  *\r\n  * The path format doesn't include complex structure; instead, it is represented by a single array\r\n  * in which each 'hop' is represented by a 2-tuple - converter anchor & target token.\r\n  * In addition, the first element is always the source token.\r\n  * The converter anchor is only used as a pointer to a converter (since converter addresses are more\r\n  * likely to change as opposed to anchor addresses).\r\n  *\r\n  * Format:\r\n  * [source token, converter anchor, target token, converter anchor, target token...]\r\n*/\r\ncontract BancorNetwork is TokenHolder, ContractRegistryClient, ReentrancyGuard {\r\n    using SafeMath for uint256;\r\n\r\n    uint256 private constant PPM_RESOLUTION = 1000000;\r\n    IERC20Token private constant ETH_RESERVE_ADDRESS = IERC20Token(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);\r\n\r\n    struct ConversionStep {\r\n        IConverter converter;\r\n        IConverterAnchor anchor;\r\n        IERC20Token sourceToken;\r\n        IERC20Token targetToken;\r\n        address payable beneficiary;\r\n        bool isV28OrHigherConverter;\r\n        bool processAffiliateFee;\r\n    }\r\n\r\n    uint256 public maxAffiliateFee = 30000;     // maximum affiliate-fee\r\n\r\n    mapping (IERC20Token => bool) public etherTokens;   // list of all supported ether tokens\r\n\r\n    /**\r\n      * @dev triggered when a conversion between two tokens occurs\r\n      *\r\n      * @param _smartToken  anchor governed by the converter\r\n      * @param _fromToken   source ERC20 token\r\n      * @param _toToken     target ERC20 token\r\n      * @param _fromAmount  amount converted, in the source token\r\n      * @param _toAmount    amount returned, minus conversion fee\r\n      * @param _trader      wallet that initiated the trade\r\n    */\r\n    event Conversion(\r\n        IConverterAnchor indexed _smartToken,\r\n        IERC20Token indexed _fromToken,\r\n        IERC20Token indexed _toToken,\r\n        uint256 _fromAmount,\r\n        uint256 _toAmount,\r\n        address _trader\r\n    );\r\n\r\n    /**\r\n      * @dev initializes a new BancorNetwork instance\r\n      *\r\n      * @param _registry    address of a contract registry contract\r\n    */\r\n    constructor(IContractRegistry _registry) ContractRegistryClient(_registry) public {\r\n        etherTokens[ETH_RESERVE_ADDRESS] = true;\r\n    }\r\n\r\n    /**\r\n      * @dev allows the owner to update the maximum affiliate-fee\r\n      *\r\n      * @param _maxAffiliateFee   maximum affiliate-fee\r\n    */\r\n    function setMaxAffiliateFee(uint256 _maxAffiliateFee)\r\n        public\r\n        ownerOnly\r\n    {\r\n        require(_maxAffiliateFee <= PPM_RESOLUTION, \"ERR_INVALID_AFFILIATE_FEE\");\r\n        maxAffiliateFee = _maxAffiliateFee;\r\n    }\r\n\r\n    /**\r\n      * @dev allows the owner to register/unregister ether tokens\r\n      *\r\n      * @param _token       ether token contract address\r\n      * @param _register    true to register, false to unregister\r\n    */\r\n    function registerEtherToken(IEtherToken _token, bool _register)\r\n        public\r\n        ownerOnly\r\n        validAddress(address(_token))\r\n        notThis(address(_token))\r\n    {\r\n        etherTokens[_token] = _register;\r\n    }\r\n\r\n    /**\r\n      * @dev returns the conversion path between two tokens in the network\r\n      * note that this method is quite expensive in terms of gas and should generally be called off-chain\r\n      *\r\n      * @param _sourceToken source token address\r\n      * @param _targetToken target token address\r\n      *\r\n      * @return conversion path between the two tokens\r\n    */\r\n    function conversionPath(IERC20Token _sourceToken, IERC20Token _targetToken) public view returns (address[] memory) {\r\n        IConversionPathFinder pathFinder = IConversionPathFinder(addressOf(CONVERSION_PATH_FINDER));\r\n        return pathFinder.findPath(_sourceToken, _targetToken);\r\n    }\r\n\r\n    /**\r\n      * @dev returns the expected target amount of converting a given amount on a given path\r\n      * note that there is no support for circular paths\r\n      *\r\n      * @param _path        conversion path (see conversion path format above)\r\n      * @param _amount      amount of _path[0] tokens received from the sender\r\n      *\r\n      * @return expected target amount\r\n    */\r\n    function rateByPath(address[] memory _path, uint256 _amount) public view returns (uint256) {\r\n        uint256 amount;\r\n        uint256 fee;\r\n        uint256 supply;\r\n        uint256 balance;\r\n        uint32 weight;\r\n        IConverter converter;\r\n        IBancorFormula formula = IBancorFormula(addressOf(BANCOR_FORMULA));\r\n\r\n        amount = _amount;\r\n\r\n        // verify that the number of elements is larger than 2 and odd\r\n        require(_path.length > 2 && _path.length % 2 == 1, \"ERR_INVALID_PATH\");\r\n\r\n        // iterate over the conversion path\r\n        for (uint256 i = 2; i < _path.length; i += 2) {\r\n            IERC20Token sourceToken = IERC20Token(_path[i - 2]);\r\n            address anchor = _path[i - 1];\r\n            IERC20Token targetToken = IERC20Token(_path[i]);\r\n\r\n            converter = IConverter(payable(IConverterAnchor(anchor).owner()));\r\n\r\n            // backward compatibility\r\n            sourceToken = getConverterTokenAddress(converter, sourceToken);\r\n            targetToken = getConverterTokenAddress(converter, targetToken);\r\n\r\n            if (address(targetToken) == anchor) { // buy the smart token\r\n                // check if the current smart token has changed\r\n                if (i < 3 || anchor != _path[i - 3])\r\n                    supply = ISmartToken(anchor).totalSupply();\r\n\r\n                // get the amount & the conversion fee\r\n                balance = converter.getConnectorBalance(sourceToken);\r\n                (, weight, , , ) = converter.connectors(sourceToken);\r\n                amount = formula.purchaseTargetAmount(supply, balance, weight, amount);\r\n                fee = amount.mul(converter.conversionFee()).div(PPM_RESOLUTION);\r\n                amount -= fee;\r\n\r\n                // update the smart token supply for the next iteration\r\n                supply = supply.add(amount);\r\n            }\r\n            else if (address(sourceToken) == anchor) { // sell the smart token\r\n                // check if the current smart token has changed\r\n                if (i < 3 || anchor != _path[i - 3])\r\n                    supply = ISmartToken(anchor).totalSupply();\r\n\r\n                // get the amount & the conversion fee\r\n                balance = converter.getConnectorBalance(targetToken);\r\n                (, weight, , , ) = converter.connectors(targetToken);\r\n                amount = formula.saleTargetAmount(supply, balance, weight, amount);\r\n                fee = amount.mul(converter.conversionFee()).div(PPM_RESOLUTION);\r\n                amount -= fee;\r\n\r\n                // update the smart token supply for the next iteration\r\n                supply = supply.sub(amount);\r\n            }\r\n            else { // cross reserve conversion\r\n                (amount, fee) = getReturn(converter, sourceToken, targetToken, amount);\r\n            }\r\n        }\r\n\r\n        return amount;\r\n    }\r\n\r\n    /**\r\n      * @dev converts the token to any other token in the bancor network by following\r\n      * a predefined conversion path and transfers the result tokens to a target account\r\n      * affiliate account/fee can also be passed in to receive a conversion fee (on top of the liquidity provider fees)\r\n      * note that the network should already have been given allowance of the source token (if not ETH)\r\n      *\r\n      * @param _path                conversion path, see conversion path format above\r\n      * @param _amount              amount to convert from, in the source token\r\n      * @param _minReturn           if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\r\n      * @param _beneficiary         account that will receive the conversion result or 0x0 to send the result to the sender account\r\n      * @param _affiliateAccount    wallet address to receive the affiliate fee or 0x0 to disable affiliate fee\r\n      * @param _affiliateFee        affiliate fee in PPM or 0 to disable affiliate fee\r\n      *\r\n      * @return amount of tokens received from the conversion\r\n    */\r\n    function convertByPath(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        address payable _beneficiary,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee)\r\n        public\r\n        payable\r\n        protected\r\n        greaterThanZero(_minReturn)\r\n        returns (uint256)\r\n    {\r\n        // verify that the path contrains at least a single 'hop' and that the number of elements is odd\r\n        require(_path.length > 2 && _path.length % 2 == 1, \"ERR_INVALID_PATH\");\r\n\r\n        // validate msg.value and prepare the source token for the conversion\r\n        handleSourceToken(IERC20Token(_path[0]), IConverterAnchor(_path[1]), _amount);\r\n\r\n        // check if affiliate fee is enabled\r\n        bool affiliateFeeEnabled = false;\r\n        if (address(_affiliateAccount) == address(0)) {\r\n            require(_affiliateFee == 0, \"ERR_INVALID_AFFILIATE_FEE\");\r\n        }\r\n        else {\r\n            require(0 < _affiliateFee && _affiliateFee <= maxAffiliateFee, \"ERR_INVALID_AFFILIATE_FEE\");\r\n            affiliateFeeEnabled = true;\r\n        }\r\n\r\n        // check if beneficiary is set\r\n        address payable beneficiary = msg.sender;\r\n        if (_beneficiary != address(0))\r\n            beneficiary = _beneficiary;\r\n\r\n        // convert and get the resulting amount\r\n        ConversionStep[] memory data = createConversionData(_path, beneficiary, affiliateFeeEnabled);\r\n        uint256 amount = doConversion(data, _amount, _minReturn, _affiliateAccount, _affiliateFee);\r\n\r\n        // handle the conversion target tokens\r\n        handleTargetToken(data, amount, beneficiary);\r\n\r\n        return amount;\r\n    }\r\n\r\n    /**\r\n      * @dev converts any other token to BNT in the bancor network by following\r\n      a predefined conversion path and transfers the result to an account on a different blockchain\r\n      * note that the network should already have been given allowance of the source token (if not ETH)\r\n      *\r\n      * @param _path                conversion path, see conversion path format above\r\n      * @param _amount              amount to convert from, in the source token\r\n      * @param _minReturn           if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\r\n      * @param _targetBlockchain    blockchain BNT will be issued on\r\n      * @param _targetAccount       address/account on the target blockchain to send the BNT to\r\n      * @param _conversionId        pre-determined unique (if non zero) id which refers to this transaction\r\n      *\r\n      * @return the amount of BNT received from this conversion\r\n    */\r\n    function xConvert(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        bytes32 _targetBlockchain,\r\n        bytes32 _targetAccount,\r\n        uint256 _conversionId\r\n    )\r\n        public\r\n        payable\r\n        returns (uint256)\r\n    {\r\n        return xConvert2(_path, _amount, _minReturn, _targetBlockchain, _targetAccount, _conversionId, address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev converts any other token to BNT in the bancor network by following\r\n      a predefined conversion path and transfers the result to an account on a different blockchain\r\n      * note that the network should already have been given allowance of the source token (if not ETH)\r\n      *\r\n      * @param _path                conversion path, see conversion path format above\r\n      * @param _amount              amount to convert from, in the source token\r\n      * @param _minReturn           if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\r\n      * @param _targetBlockchain    blockchain BNT will be issued on\r\n      * @param _targetAccount       address/account on the target blockchain to send the BNT to\r\n      * @param _conversionId        pre-determined unique (if non zero) id which refers to this transaction\r\n      * @param _affiliateAccount    affiliate account\r\n      * @param _affiliateFee        affiliate fee in PPM\r\n      *\r\n      * @return the amount of BNT received from this conversion\r\n    */\r\n    function xConvert2(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        bytes32 _targetBlockchain,\r\n        bytes32 _targetAccount,\r\n        uint256 _conversionId,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee\r\n    )\r\n        public\r\n        payable\r\n        greaterThanZero(_minReturn)\r\n        returns (uint256)\r\n    {\r\n        IERC20Token targetToken = IERC20Token(_path[_path.length - 1]);\r\n        IBancorX bancorX = IBancorX(addressOf(BANCOR_X));\r\n\r\n        // verify that the destination token is BNT\r\n        require(targetToken == IERC20Token(addressOf(BNT_TOKEN)), \"ERR_INVALID_TARGET_TOKEN\");\r\n\r\n        // convert and get the resulting amount\r\n        uint256 amount = convertByPath(_path, _amount, _minReturn, payable(address(this)), _affiliateAccount, _affiliateFee);\r\n\r\n        // grant BancorX allowance\r\n        ensureAllowance(targetToken, address(bancorX), amount);\r\n\r\n        // transfer the resulting amount to BancorX\r\n        bancorX.xTransfer(_targetBlockchain, _targetAccount, amount, _conversionId);\r\n\r\n        return amount;\r\n    }\r\n\r\n    /**\r\n      * @dev allows a user to convert a token that was sent from another blockchain into any other\r\n      * token on the BancorNetwork\r\n      * ideally this transaction is created before the previous conversion is even complete, so\r\n      * so the input amount isn't known at that point - the amount is actually take from the\r\n      * BancorX contract directly by specifying the conversion id\r\n      *\r\n      * @param _path            conversion path\r\n      * @param _bancorX         address of the BancorX contract for the source token\r\n      * @param _conversionId    pre-determined unique (if non zero) id which refers to this conversion\r\n      * @param _minReturn       if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero\r\n      * @param _beneficiary     wallet to receive the conversion result\r\n      *\r\n      * @return amount of tokens received from the conversion\r\n    */\r\n    function completeXConversion(address[] memory _path, IBancorX _bancorX, uint256 _conversionId, uint256 _minReturn, address payable _beneficiary)\r\n        public returns (uint256)\r\n    {\r\n        // verify that the source token is the BancorX token\r\n        require(IERC20Token(_path[0]) == _bancorX.token(), \"ERR_INVALID_SOURCE_TOKEN\");\r\n\r\n        // get conversion amount from BancorX contract\r\n        uint256 amount = _bancorX.getXTransferAmount(_conversionId, msg.sender);\r\n\r\n        // perform the conversion\r\n        return convertByPath(_path, amount, _minReturn, _beneficiary, address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev executes the actual conversion by following the conversion path\r\n      *\r\n      * @param _data                conversion data, see ConversionStep struct above\r\n      * @param _amount              amount to convert from, in the source token\r\n      * @param _minReturn           if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero\r\n      * @param _affiliateAccount    affiliate account\r\n      * @param _affiliateFee        affiliate fee in PPM\r\n      *\r\n      * @return amount of tokens received from the conversion\r\n    */\r\n    function doConversion(\r\n        ConversionStep[] memory _data,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee\r\n    ) private returns (uint256) {\r\n        uint256 toAmount;\r\n        uint256 fromAmount = _amount;\r\n\r\n        // iterate over the conversion data\r\n        for (uint256 i = 0; i < _data.length; i++) {\r\n            ConversionStep memory stepData = _data[i];\r\n\r\n            // newer converter\r\n            if (stepData.isV28OrHigherConverter) {\r\n                // transfer the tokens to the converter only if the network contract currently holds the tokens\r\n                // not needed with ETH or if it's the first conversion step\r\n                if (i != 0 && _data[i - 1].beneficiary == address(this) && !etherTokens[stepData.sourceToken])\r\n                    safeTransfer(stepData.sourceToken, address(stepData.converter), fromAmount);\r\n            }\r\n            // older converter\r\n            // if the source token is the smart token, no need to do any transfers as the converter controls it\r\n            else if (stepData.sourceToken != ISmartToken(address(stepData.anchor))) {\r\n                // grant allowance for it to transfer the tokens from the network contract\r\n                ensureAllowance(stepData.sourceToken, address(stepData.converter), fromAmount);\r\n            }\r\n\r\n            // do the conversion\r\n            if (!stepData.isV28OrHigherConverter)\r\n                toAmount = ILegacyConverter(address(stepData.converter)).change(stepData.sourceToken, stepData.targetToken, fromAmount, 1);\r\n            else if (etherTokens[stepData.sourceToken])\r\n                toAmount = stepData.converter.convert{ value: msg.value }(stepData.sourceToken, stepData.targetToken, fromAmount, msg.sender, stepData.beneficiary);\r\n            else\r\n                toAmount = stepData.converter.convert(stepData.sourceToken, stepData.targetToken, fromAmount, msg.sender, stepData.beneficiary);\r\n\r\n            // pay affiliate-fee if needed\r\n            if (stepData.processAffiliateFee) {\r\n                uint256 affiliateAmount = toAmount.mul(_affiliateFee).div(PPM_RESOLUTION);\r\n                require(stepData.targetToken.transfer(_affiliateAccount, affiliateAmount), \"ERR_FEE_TRANSFER_FAILED\");\r\n                toAmount -= affiliateAmount;\r\n            }\r\n\r\n            emit Conversion(stepData.anchor, stepData.sourceToken, stepData.targetToken, fromAmount, toAmount, msg.sender);\r\n            fromAmount = toAmount;\r\n        }\r\n\r\n        // ensure the trade meets the minimum requested amount\r\n        require(toAmount >= _minReturn, \"ERR_RETURN_TOO_LOW\");\r\n\r\n        return toAmount;\r\n    }\r\n\r\n    /**\r\n      * @dev validates msg.value and prepares the conversion source token for the conversion\r\n      *\r\n      * @param _sourceToken source token of the first conversion step\r\n      * @param _anchor      converter anchor of the first conversion step\r\n      * @param _amount      amount to convert from, in the source token\r\n    */\r\n    function handleSourceToken(IERC20Token _sourceToken, IConverterAnchor _anchor, uint256 _amount) private {\r\n        IConverter firstConverter = IConverter(payable(_anchor.owner()));\r\n        bool isNewerConverter = isV28OrHigherConverter(firstConverter);\r\n\r\n        // ETH\r\n        if (msg.value > 0) {\r\n            // validate msg.value\r\n            require(msg.value == _amount, \"ERR_ETH_AMOUNT_MISMATCH\");\r\n\r\n            // EtherToken converter - deposit the ETH into the EtherToken\r\n            // note that it can still be a non ETH converter if the path is wrong\r\n            // but such conversion will simply revert\r\n            if (!isNewerConverter)\r\n                IEtherToken(address(getConverterEtherTokenAddress(firstConverter))).deposit{ value: msg.value }();\r\n        }\r\n        // EtherToken\r\n        else if (etherTokens[_sourceToken]) {\r\n            // claim the tokens - if the source token is ETH reserve, this call will fail\r\n            // since in that case the transaction must be sent with msg.value\r\n            safeTransferFrom(_sourceToken, msg.sender, address(this), _amount);\r\n\r\n            // ETH converter - withdraw the ETH\r\n            if (isNewerConverter)\r\n                IEtherToken(address(_sourceToken)).withdraw(_amount);\r\n        }\r\n        // other ERC20 token\r\n        else {\r\n            // newer converter - transfer the tokens from the sender directly to the converter\r\n            // otherwise claim the tokens\r\n            if (isNewerConverter)\r\n                safeTransferFrom(_sourceToken, msg.sender, address(firstConverter), _amount);\r\n            else\r\n                safeTransferFrom(_sourceToken, msg.sender, address(this), _amount);\r\n        }\r\n    }\r\n\r\n    /**\r\n      * @dev handles the conversion target token if the network still holds it at the end of the conversion\r\n      *\r\n      * @param _data        conversion data, see ConversionStep struct above\r\n      * @param _amount      conversion target amount\r\n      * @param _beneficiary wallet to receive the conversion result\r\n    */\r\n    function handleTargetToken(ConversionStep[] memory _data, uint256 _amount, address payable _beneficiary) private {\r\n        ConversionStep memory stepData = _data[_data.length - 1];\r\n\r\n        // network contract doesn't hold the tokens, do nothing\r\n        if (stepData.beneficiary != address(this))\r\n            return;\r\n\r\n        IERC20Token targetToken = stepData.targetToken;\r\n\r\n        // ETH / EtherToken\r\n        if (etherTokens[targetToken]) {\r\n            // newer converter should send ETH directly to the beneficiary\r\n            assert(!stepData.isV28OrHigherConverter);\r\n\r\n            // EtherToken converter - withdraw the ETH and transfer to the beneficiary\r\n            IEtherToken(address(targetToken)).withdrawTo(_beneficiary, _amount);\r\n        }\r\n        // other ERC20 token\r\n        else {\r\n            safeTransfer(targetToken, _beneficiary, _amount);\r\n        }\r\n    }\r\n\r\n    /**\r\n      * @dev creates a memory cache of all conversion steps data to minimize logic and external calls during conversions\r\n      *\r\n      * @param _conversionPath      conversion path, see conversion path format above\r\n      * @param _beneficiary         wallet to receive the conversion result\r\n      * @param _affiliateFeeEnabled true if affiliate fee was requested by the sender, false if not\r\n      *\r\n      * @return cached conversion data to be ingested later on by the conversion flow\r\n    */\r\n    function createConversionData(address[] memory _conversionPath, address payable _beneficiary, bool _affiliateFeeEnabled) private view returns (ConversionStep[] memory) {\r\n        ConversionStep[] memory data = new ConversionStep[](_conversionPath.length / 2);\r\n\r\n        bool affiliateFeeProcessed = false;\r\n        IERC20Token bntToken = IERC20Token(addressOf(BNT_TOKEN));\r\n        // iterate the conversion path and create the conversion data for each step\r\n        uint256 i;\r\n        for (i = 0; i < _conversionPath.length - 1; i += 2) {\r\n            IConverterAnchor anchor = IConverterAnchor(_conversionPath[i + 1]);\r\n            IConverter converter = IConverter(payable(anchor.owner()));\r\n            IERC20Token targetToken = IERC20Token(_conversionPath[i + 2]);\r\n\r\n            // check if the affiliate fee should be processed in this step\r\n            bool processAffiliateFee = _affiliateFeeEnabled && !affiliateFeeProcessed && targetToken == bntToken;\r\n            if (processAffiliateFee)\r\n                affiliateFeeProcessed = true;\r\n\r\n            data[i / 2] = ConversionStep({\r\n                // set the converter anchor\r\n                anchor: anchor,\r\n\r\n                // set the converter\r\n                converter: converter,\r\n\r\n                // set the source/target tokens\r\n                sourceToken: IERC20Token(_conversionPath[i]),\r\n                targetToken: targetToken,\r\n\r\n                // requires knowledge about the next step, so initialize in the next phase\r\n                beneficiary: address(0),\r\n\r\n                // set flags\r\n                isV28OrHigherConverter: isV28OrHigherConverter(converter),\r\n                processAffiliateFee: processAffiliateFee\r\n            });\r\n        }\r\n\r\n        // ETH support\r\n        // source is ETH\r\n        ConversionStep memory stepData = data[0];\r\n        if (etherTokens[stepData.sourceToken]) {\r\n            // newer converter - replace the source token address with ETH reserve address\r\n            if (stepData.isV28OrHigherConverter)\r\n                stepData.sourceToken = ETH_RESERVE_ADDRESS;\r\n            // older converter - replace the source token with the EtherToken address used by the converter\r\n            else\r\n                stepData.sourceToken = getConverterEtherTokenAddress(stepData.converter);\r\n        }\r\n\r\n        // target is ETH\r\n        stepData = data[data.length - 1];\r\n        if (etherTokens[stepData.targetToken]) {\r\n            // newer converter - replace the target token address with ETH reserve address\r\n            if (stepData.isV28OrHigherConverter)\r\n                stepData.targetToken = ETH_RESERVE_ADDRESS;\r\n            // older converter - replace the target token with the EtherToken address used by the converter\r\n            else\r\n                stepData.targetToken = getConverterEtherTokenAddress(stepData.converter);\r\n        }\r\n\r\n        // set the beneficiary for each step\r\n        for (i = 0; i < data.length; i++) {\r\n            stepData = data[i];\r\n\r\n            // first check if the converter in this step is newer as older converters don't even support the beneficiary argument\r\n            if (stepData.isV28OrHigherConverter) {\r\n                // if affiliate fee is processed in this step, beneficiary is the network contract\r\n                if (stepData.processAffiliateFee)\r\n                    stepData.beneficiary = payable(address(this));\r\n                // if it's the last step, beneficiary is the final beneficiary\r\n                else if (i == data.length - 1)\r\n                    stepData.beneficiary = _beneficiary;\r\n                // if the converter in the next step is newer, beneficiary is the next converter\r\n                else if (data[i + 1].isV28OrHigherConverter)\r\n                    stepData.beneficiary = address(data[i + 1].converter);\r\n                // the converter in the next step is older, beneficiary is the network contract\r\n                else\r\n                    stepData.beneficiary = payable(address(this));\r\n            }\r\n            else {\r\n                // converter in this step is older, beneficiary is the network contract\r\n                stepData.beneficiary = payable(address(this));\r\n            }\r\n        }\r\n\r\n        return data;\r\n    }\r\n\r\n    /**\r\n      * @dev utility, checks whether allowance for the given spender exists and approves one if it doesn't.\r\n      * Note that we use the non standard erc-20 interface in which `approve` has no return value so that\r\n      * this function will work for both standard and non standard tokens\r\n      *\r\n      * @param _token   token to check the allowance in\r\n      * @param _spender approved address\r\n      * @param _value   allowance amount\r\n    */\r\n    function ensureAllowance(IERC20Token _token, address _spender, uint256 _value) private {\r\n        uint256 allowance = _token.allowance(address(this), _spender);\r\n        if (allowance < _value) {\r\n            if (allowance > 0)\r\n                safeApprove(_token, _spender, 0);\r\n            safeApprove(_token, _spender, _value);\r\n        }\r\n    }\r\n\r\n    // legacy - returns the address of an EtherToken used by the converter\r\n    function getConverterEtherTokenAddress(IConverter _converter) private view returns (IERC20Token) {\r\n        uint256 reserveCount = _converter.connectorTokenCount();\r\n        for (uint256 i = 0; i < reserveCount; i++) {\r\n            IERC20Token reserveTokenAddress = _converter.connectorTokens(i);\r\n            if (etherTokens[reserveTokenAddress])\r\n                return reserveTokenAddress;\r\n        }\r\n\r\n        return ETH_RESERVE_ADDRESS;\r\n    }\r\n\r\n    // legacy - if the token is an ether token, returns the ETH reserve address\r\n    // used by the converter, otherwise returns the input token address\r\n    function getConverterTokenAddress(IConverter _converter, IERC20Token _token) private view returns (IERC20Token) {\r\n        if (!etherTokens[_token])\r\n            return _token;\r\n\r\n        if (isV28OrHigherConverter(_converter))\r\n            return ETH_RESERVE_ADDRESS;\r\n\r\n        return getConverterEtherTokenAddress(_converter);\r\n    }\r\n\r\n    bytes4 private constant GET_RETURN_FUNC_SELECTOR = bytes4(keccak256(\"getReturn(address,address,uint256)\"));\r\n\r\n    // using a static call to get the return from older converters\r\n    function getReturn(IConverter _dest, IERC20Token _sourceToken, IERC20Token _targetToken, uint256 _amount) internal view returns (uint256, uint256) {\r\n        bytes memory data = abi.encodeWithSelector(GET_RETURN_FUNC_SELECTOR, _sourceToken, _targetToken, _amount);\r\n        (bool success, bytes memory returnData) = address(_dest).staticcall(data);\r\n\r\n        if (success) {\r\n            if (returnData.length == 64) {\r\n                return abi.decode(returnData, (uint256, uint256));\r\n            }\r\n\r\n            if (returnData.length == 32) {\r\n                return (abi.decode(returnData, (uint256)), 0);\r\n            }\r\n        }\r\n\r\n        return (0, 0);\r\n    }\r\n\r\n    bytes4 private constant IS_V28_OR_HIGHER_FUNC_SELECTOR = bytes4(keccak256(\"isV28OrHigher()\"));\r\n\r\n    // using a static call to identify converter version\r\n    // can't rely on the version number since the function had a different signature in older converters\r\n    function isV28OrHigherConverter(IConverter _converter) internal view returns (bool) {\r\n        bytes memory data = abi.encodeWithSelector(IS_V28_OR_HIGHER_FUNC_SELECTOR);\r\n        (bool success, bytes memory returnData) = address(_converter).staticcall{ gas: 4000 }(data);\r\n\r\n        if (success && returnData.length == 32) {\r\n            return abi.decode(returnData, (bool));\r\n        }\r\n\r\n        return false;\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function getReturnByPath(address[] memory _path, uint256 _amount) public view returns (uint256, uint256) {\r\n        return (rateByPath(_path, _amount), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function convert(address[] memory _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256) {\r\n        return convertByPath(_path, _amount, _minReturn, address(0), address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function convert2(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee\r\n    )\r\n        public\r\n        payable\r\n        returns (uint256)\r\n    {\r\n        return convertByPath(_path, _amount, _minReturn, address(0), _affiliateAccount, _affiliateFee);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function convertFor(address[] memory _path, uint256 _amount, uint256 _minReturn, address payable _beneficiary) public payable returns (uint256) {\r\n        return convertByPath(_path, _amount, _minReturn, _beneficiary, address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function convertFor2(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        address payable _beneficiary,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee\r\n    )\r\n        public\r\n        payable\r\n        greaterThanZero(_minReturn)\r\n        returns (uint256)\r\n    {\r\n        return convertByPath(_path, _amount, _minReturn, _beneficiary, _affiliateAccount, _affiliateFee);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function claimAndConvert(address[] memory _path, uint256 _amount, uint256 _minReturn) public returns (uint256) {\r\n        return convertByPath(_path, _amount, _minReturn, address(0), address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function claimAndConvert2(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n        address _affiliateAccount,\r\n        uint256 _affiliateFee\r\n    )\r\n        public\r\n        returns (uint256)\r\n    {\r\n        return convertByPath(_path, _amount, _minReturn, address(0), _affiliateAccount, _affiliateFee);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function claimAndConvertFor(address[] memory _path, uint256 _amount, uint256 _minReturn, address payable _beneficiary) public returns (uint256) {\r\n        return convertByPath(_path, _amount, _minReturn, _beneficiary, address(0), 0);\r\n    }\r\n\r\n    /**\r\n      * @dev deprecated, backward compatibility\r\n    */\r\n    function claimAndConvertFor2(\r\n        address[] memory _path,\r\n        uint256 _amount,\r\n        uint256 _minReturn,\r\n     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              "text": " @dev allows a user to convert a token that was sent from another blockchain into any other\n token on the BancorNetwork\n ideally this transaction is created before the previous conversion is even complete, so\n so the input amount isn't known at that point - the amount is actually take from the\n BancorX contract directly by specifying the conversion id\n @param _path            conversion path\n @param _bancorX         address of the BancorX contract for the source token\n @param _conversionId    pre-determined unique (if non zero) id which refers to this conversion\n @param _minReturn       if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero\n @param _beneficiary     wallet to receive the conversion result\n @return amount of tokens received from the conversion"
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              "text": " @dev allows a user to convert a token that was sent from another blockchain into any other\n token on the BancorNetwork\n ideally this transaction is created before the previous conversion is even complete, so\n so the input amount isn't known at that point - the amount is actually take from the\n BancorX contract directly by specifying the conversion id\n @param _path            conversion path\n @param _bancorX         address of the BancorX contract for the source token\n @param _conversionId    pre-determined unique (if non zero) id which refers to this conversion\n @param _minReturn       if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero\n @param _beneficiary     wallet to receive the conversion result\n @return amount of tokens received from the conversion"
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      },
      "links": {},
      "address": "0x965e4A39955c8c4EF02366420d35F82aB56669b7",
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  },
  "schemaVersion": "3.2.3",
  "updatedAt": "2020-11-10T14:20:44.742Z",
  "networkType": "ethereum",
  "devdoc": {
    "details": "The BancorNetwork contract is the main entry point for Bancor token conversions. It also allows for the conversion of any token in the Bancor Network to any other token in a single transaction by providing a conversion path. A note on Conversion Path: Conversion path is a data structure that is used when converting a token to another token in the Bancor Network, when the conversion cannot necessarily be done by a single converter and might require multiple 'hops'. The path defines which converters should be used and what kind of conversion should be done in each step. The path format doesn't include complex structure; instead, it is represented by a single array in which each 'hop' is represented by a 2-tuple - converter anchor & target token. In addition, the first element is always the source token. The converter anchor is only used as a pointer to a converter (since converter addresses are more likely to change as opposed to anchor addresses). Format: [source token, converter anchor, target token, converter anchor, target token...]",
    "events": {
      "Conversion(address,address,address,uint256,uint256,address)": {
        "details": "triggered when a conversion between two tokens occurs",
        "params": {
          "_fromAmount": "amount converted, in the source token",
          "_fromToken": "source ERC20 token",
          "_smartToken": "anchor governed by the converter",
          "_toAmount": "amount returned, minus conversion fee",
          "_toToken": "target ERC20 token",
          "_trader": "wallet that initiated the trade"
        }
      }
    },
    "kind": "dev",
    "methods": {
      "acceptOwnership()": {
        "details": "used by a new owner to accept an ownership transfer"
      },
      "claimAndConvert(address[],uint256,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "claimAndConvert2(address[],uint256,uint256,address,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "claimAndConvertFor(address[],uint256,uint256,address)": {
        "details": "deprecated, backward compatibility"
      },
      "claimAndConvertFor2(address[],uint256,uint256,address,address,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "completeXConversion(address[],address,uint256,uint256,address)": {
        "details": "allows a user to convert a token that was sent from another blockchain into any other token on the BancorNetwork ideally this transaction is created before the previous conversion is even complete, so so the input amount isn't known at that point - the amount is actually take from the BancorX contract directly by specifying the conversion id",
        "params": {
          "_bancorX": "address of the BancorX contract for the source token",
          "_beneficiary": "wallet to receive the conversion result",
          "_conversionId": "pre-determined unique (if non zero) id which refers to this conversion",
          "_minReturn": "if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero",
          "_path": "conversion path"
        },
        "returns": {
          "_0": "amount of tokens received from the conversion"
        }
      },
      "constructor": {
        "details": "initializes a new BancorNetwork instance",
        "params": {
          "_registry": "address of a contract registry contract"
        }
      },
      "conversionPath(address,address)": {
        "details": "returns the conversion path between two tokens in the network note that this method is quite expensive in terms of gas and should generally be called off-chain",
        "params": {
          "_sourceToken": "source token address",
          "_targetToken": "target token address"
        },
        "returns": {
          "_0": "conversion path between the two tokens"
        }
      },
      "convert(address[],uint256,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "convert2(address[],uint256,uint256,address,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "convertByPath(address[],uint256,uint256,address,address,uint256)": {
        "details": "converts the token to any other token in the bancor network by following a predefined conversion path and transfers the result tokens to a target account affiliate account/fee can also be passed in to receive a conversion fee (on top of the liquidity provider fees) note that the network should already have been given allowance of the source token (if not ETH)",
        "params": {
          "_affiliateAccount": "wallet address to receive the affiliate fee or 0x0 to disable affiliate fee",
          "_affiliateFee": "affiliate fee in PPM or 0 to disable affiliate fee",
          "_amount": "amount to convert from, in the source token",
          "_beneficiary": "account that will receive the conversion result or 0x0 to send the result to the sender account",
          "_minReturn": "if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero",
          "_path": "conversion path, see conversion path format above"
        },
        "returns": {
          "_0": "amount of tokens received from the conversion"
        }
      },
      "convertFor(address[],uint256,uint256,address)": {
        "details": "deprecated, backward compatibility"
      },
      "convertFor2(address[],uint256,uint256,address,address,uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "getReturnByPath(address[],uint256)": {
        "details": "deprecated, backward compatibility"
      },
      "rateByPath(address[],uint256)": {
        "details": "returns the expected target amount of converting a given amount on a given path note that there is no support for circular paths",
        "params": {
          "_amount": "amount of _path[0] tokens received from the sender",
          "_path": "conversion path (see conversion path format above)"
        },
        "returns": {
          "_0": "expected target amount"
        }
      },
      "registerEtherToken(address,bool)": {
        "details": "allows the owner to register/unregister ether tokens",
        "params": {
          "_register": "true to register, false to unregister",
          "_token": "ether token contract address"
        }
      },
      "restoreRegistry()": {
        "details": "restores the previous contract-registry"
      },
      "restrictRegistryUpdate(bool)": {
        "details": "restricts the permission to update the contract-registry",
        "params": {
          "_onlyOwnerCanUpdateRegistry": "indicates whether or not permission is restricted to owner only"
        }
      },
      "setMaxAffiliateFee(uint256)": {
        "details": "allows the owner to update the maximum affiliate-fee",
        "params": {
          "_maxAffiliateFee": "maximum affiliate-fee"
        }
      },
      "transferOwnership(address)": {
        "details": "allows transferring the contract ownership the new owner still needs to accept the transfer can only be called by the contract owner",
        "params": {
          "_newOwner": "new contract owner"
        }
      },
      "updateRegistry()": {
        "details": "updates to the new contract-registry"
      },
      "withdrawTokens(address,address,uint256)": {
        "details": "withdraws tokens held by the contract and sends them to an account can only be called by the owner",
        "params": {
          "_amount": "amount to withdraw",
          "_to": "account to receive the new amount",
          "_token": "ERC20 token contract address"
        }
      },
      "xConvert(address[],uint256,uint256,bytes32,bytes32,uint256)": {
        "details": "converts any other token to BNT in the bancor network by following a predefined conversion path and transfers the result to an account on a different blockchain note that the network should already have been given allowance of the source token (if not ETH)",
        "params": {
          "_amount": "amount to convert from, in the source token",
          "_conversionId": "pre-determined unique (if non zero) id which refers to this transaction",
          "_minReturn": "if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero",
          "_path": "conversion path, see conversion path format above",
          "_targetAccount": "address/account on the target blockchain to send the BNT to",
          "_targetBlockchain": "blockchain BNT will be issued on"
        },
        "returns": {
          "_0": "the amount of BNT received from this conversion"
        }
      },
      "xConvert2(address[],uint256,uint256,bytes32,bytes32,uint256,address,uint256)": {
        "details": "converts any other token to BNT in the bancor network by following a predefined conversion path and transfers the result to an account on a different blockchain note that the network should already have been given allowance of the source token (if not ETH)",
        "params": {
          "_affiliateAccount": "affiliate account",
          "_affiliateFee": "affiliate fee in PPM",
          "_amount": "amount to convert from, in the source token",
          "_conversionId": "pre-determined unique (if non zero) id which refers to this transaction",
          "_minReturn": "if the conversion results in an amount smaller than the minimum return - it is cancelled, must be greater than zero",
          "_path": "conversion path, see conversion path format above",
          "_targetAccount": "address/account on the target blockchain to send the BNT to",
          "_targetBlockchain": "blockchain BNT will be issued on"
        },
        "returns": {
          "_0": "the amount of BNT received from this conversion"
        }
      }
    },
    "version": 1
  },
  "userdoc": {
    "kind": "user",
    "methods": {},
    "version": 1
  }
}