5249 lines
230 KiB
JSON
5249 lines
230 KiB
JSON
{
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"contractName": "TokenHandler",
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"abi": [],
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"metadata": "{\"compiler\":{\"version\":\"0.6.12+commit.27d51765\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/TokenHandler.sol\":\"TokenHandler\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/token/interfaces/IERC20Token.sol\":{\"keccak256\":\"0xe6f988c3156e88258474526a541d5a42b6a9adae98b04177a059d9f723bc82cd\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://9a6eb77a5b9ce70995a11a6e48ac3985a4c70896fe5fe04d46146ad7c1c83ea3\",\"dweb:/ipfs/QmYvGSveZFG51tghwkVuu6eK9Jy8frHpfLxHTMyvNZN461\"]},\"/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/TokenHandler.sol\":{\"keccak256\":\"0xf65b87e3bf3343e368da67878c19d1a043a1025b10e9053d3562b53b4aa447fe\",\"license\":\"SEE LICENSE IN LICENSE\",\"urls\":[\"bzz-raw://b85c5d96642c14c53b8d5062eecd4d27d3bdb457d1d0f130900763a75a512eb7\",\"dweb:/ipfs/QmUHtbqC1khqnRZXYn11Aykus4m5e9MVNUWqorxhpr5ipJ\"]}},\"version\":1}",
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"source": "// SPDX-License-Identifier: SEE LICENSE IN LICENSE\npragma solidity 0.6.12;\nimport \"../token/interfaces/IERC20Token.sol\";\n\ncontract TokenHandler {\n bytes4 private constant APPROVE_FUNC_SELECTOR = bytes4(keccak256(\"approve(address,uint256)\"));\n bytes4 private constant TRANSFER_FUNC_SELECTOR = bytes4(keccak256(\"transfer(address,uint256)\"));\n bytes4 private constant TRANSFER_FROM_FUNC_SELECTOR = bytes4(keccak256(\"transferFrom(address,address,uint256)\"));\n\n /**\n * @dev executes the ERC20 token's `approve` function and reverts upon failure\n * the main purpose of this function is to prevent a non standard ERC20 token\n * from failing silently\n *\n * @param _token ERC20 token address\n * @param _spender approved address\n * @param _value allowance amount\n */\n function safeApprove(IERC20Token _token, address _spender, uint256 _value) internal {\n (bool success, bytes memory data) = address(_token).call(abi.encodeWithSelector(APPROVE_FUNC_SELECTOR, _spender, _value));\n require(success && (data.length == 0 || abi.decode(data, (bool))), 'ERR_APPROVE_FAILED');\n }\n\n /**\n * @dev executes the ERC20 token's `transfer` function and reverts upon failure\n * the main purpose of this function is to prevent a non standard ERC20 token\n * from failing silently\n *\n * @param _token ERC20 token address\n * @param _to target address\n * @param _value transfer amount\n */\n function safeTransfer(IERC20Token _token, address _to, uint256 _value) internal {\n (bool success, bytes memory data) = address(_token).call(abi.encodeWithSelector(TRANSFER_FUNC_SELECTOR, _to, _value));\n require(success && (data.length == 0 || abi.decode(data, (bool))), 'ERR_TRANSFER_FAILED');\n }\n\n /**\n * @dev executes the ERC20 token's `transferFrom` function and reverts upon failure\n * the main purpose of this function is to prevent a non standard ERC20 token\n * from failing silently\n *\n * @param _token ERC20 token address\n * @param _from source address\n * @param _to target address\n * @param _value transfer amount\n */\n function safeTransferFrom(IERC20Token _token, address _from, address _to, uint256 _value) internal {\n (bool success, bytes memory data) = address(_token).call(abi.encodeWithSelector(TRANSFER_FROM_FUNC_SELECTOR, _from, _to, _value));\n require(success && (data.length == 0 || abi.decode(data, (bool))), 'ERR_TRANSFER_FROM_FAILED');\n }\n}\n",
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"sourcePath": "/home/lash/src/ext/cic/grassrootseconomics/bancor-contracts/solidity/contracts/utility/TokenHandler.sol",
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"text": " @dev executes the ERC20 token's `transfer` function and reverts upon failure\n the main purpose of this function is to prevent a non standard ERC20 token\n from failing silently\n @param _token ERC20 token address\n @param _to target address\n @param _value transfer amount"
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