@aragon/apps-payroll

{ "contractName": "SafeERC20", "abi": [], "bytecode": "0x604c602c600b82828239805160001a60731460008114601c57601e565bfe5b5030600052607381538281f30073000000000000000000000000000000000000000030146080604052600080fd00a165627a7a72305820b186b2a41e82721bf2d14c673b215e901a52478a78541d6a0f59a06a73352e030029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fd00a165627a7a72305820b186b2a41e82721bf2d14c673b215e901a52478a78541d6a0f59a06a73352e030029", "sourceMap": "376:5675:36:-;;132:2:-1;166:7;155:9;146:7;137:37;252:7;246:14;243:1;238:23;232:4;229:33;270:1;265:20;;;;222:63;;265:20;274:9;222:63;;298:9;295:1;288:20;328:4;319:7;311:22;352:7;343;336:24", "deployedSourceMap": "376:5675:36:-;;;;;;;;", "source": "// Inspired by AdEx (https://github.com/AdExNetwork/adex-protocol-eth/blob/b9df617829661a7518ee10f4cb6c4108659dd6d5/contracts/libs/SafeERC20.sol)\n// and 0x (https://github.com/0xProject/0x-monorepo/blob/737d1dc54d72872e24abce5a1dbe1b66d35fa21a/contracts/protocol/contracts/protocol/AssetProxy/ERC20Proxy.sol#L143)\n\npragma solidity ^0.4.24;\n\nimport \"../lib/token/ERC20.sol\";\n\n\nlibrary SafeERC20 {\n // Before 0.5, solidity has a mismatch between `address.transfer()` and `token.transfer()`:\n // https://github.com/ethereum/solidity/issues/3544\n bytes4 private constant TRANSFER_SELECTOR = 0xa9059cbb;\n\n string private constant ERROR_TOKEN_BALANCE_REVERTED = \"SAFE_ERC_20_BALANCE_REVERTED\";\n string private constant ERROR_TOKEN_ALLOWANCE_REVERTED = \"SAFE_ERC_20_ALLOWANCE_REVERTED\";\n\n function invokeAndCheckSuccess(address _addr, bytes memory _calldata)\n private\n returns (bool)\n {\n bool ret;\n assembly {\n let ptr := mload(0x40) // free memory pointer\n\n let success := call(\n gas, // forward all gas\n _addr, // address\n 0, // no value\n add(_calldata, 0x20), // calldata start\n mload(_calldata), // calldata length\n ptr, // write output over free memory\n 0x20 // uint256 return\n )\n\n if gt(success, 0) {\n // Check number of bytes returned from last function call\n switch returndatasize\n\n // No bytes returned: assume success\n case 0 {\n ret := 1\n }\n\n // 32 bytes returned: check if non-zero\n case 0x20 {\n // Only return success if returned data was true\n // Already have output in ptr\n ret := eq(mload(ptr), 1)\n }\n\n // Not sure what was returned: don't mark as success\n default { }\n }\n }\n return ret;\n }\n\n function staticInvoke(address _addr, bytes memory _calldata)\n private\n view\n returns (bool, uint256)\n {\n bool success;\n uint256 ret;\n assembly {\n let ptr := mload(0x40) // free memory pointer\n\n success := staticcall(\n gas, // forward all gas\n _addr, // address\n add(_calldata, 0x20), // calldata start\n mload(_calldata), // calldata length\n ptr, // write output over free memory\n 0x20 // uint256 return\n )\n\n if gt(success, 0) {\n ret := mload(ptr)\n }\n }\n return (success, ret);\n }\n\n /**\n * @dev Same as a standards-compliant ERC20.transfer() that never reverts (returns false).\n * Note that this makes an external call to the token.\n */\n function safeTransfer(ERC20 _token, address _to, uint256 _amount) internal returns (bool) {\n bytes memory transferCallData = abi.encodeWithSelector(\n TRANSFER_SELECTOR,\n _to,\n _amount\n );\n return invokeAndCheckSuccess(_token, transferCallData);\n }\n\n /**\n * @dev Same as a standards-compliant ERC20.transferFrom() that never reverts (returns false).\n * Note that this makes an external call to the token.\n */\n function safeTransferFrom(ERC20 _token, address _from, address _to, uint256 _amount) internal returns (bool) {\n bytes memory transferFromCallData = abi.encodeWithSelector(\n _token.transferFrom.selector,\n _from,\n _to,\n _amount\n );\n return invokeAndCheckSuccess(_token, transferFromCallData);\n }\n\n /**\n * @dev Same as a standards-compliant ERC20.approve() that never reverts (returns false).\n * Note that this makes an external call to the token.\n */\n function safeApprove(ERC20 _token, address _spender, uint256 _amount) internal returns (bool) {\n bytes memory approveCallData = abi.encodeWithSelector(\n _token.approve.selector,\n _spender,\n _amount\n );\n return invokeAndCheckSuccess(_token, approveCallData);\n }\n\n /**\n * @dev Static call into ERC20.balanceOf().\n * Reverts if the call fails for some reason (should never fail).\n */\n function staticBalanceOf(ERC20 _token, address _owner) internal view returns (uint256) {\n bytes memory balanceOfCallData = abi.encodeWithSelector(\n _token.balanceOf.selector,\n _owner\n );\n\n (bool success, uint256 tokenBalance) = staticInvoke(_token, balanceOfCallData);\n require(success, ERROR_TOKEN_BALANCE_REVERTED);\n\n return tokenBalance;\n }\n\n /**\n * @dev Static call into ERC20.allowance().\n * Reverts if the call fails for some reason (should never fail).\n */\n function staticAllowance(ERC20 _token, address _owner, address _spender) internal view returns (uint256) {\n bytes memory allowanceCallData = abi.encodeWithSelector(\n _token.allowance.selector,\n _owner,\n _spender\n );\n\n (bool success, uint256 allowance) = staticInvoke(_token, allowanceCallData);\n require(success, ERROR_TOKEN_ALLOWANCE_REVERTED);\n\n return allowance;\n }\n\n /**\n * @dev Static call into ERC20.totalSupply().\n * Reverts if the call fails for some reason (should never fail).\n */\n function staticTotalSupply(ERC20 _token) internal view returns (uint256) {\n bytes memory totalSupplyCallData = abi.encodeWithSelector(_token.totalSupply.selector);\n\n (bool success, uint256 totalSupply) = staticInvoke(_token, totalSupplyCallData);\n require(success, ERROR_TOKEN_ALLOWANCE_REVERTED);\n\n return totalSupply;\n }\n}\n", "sourcePath": "@aragon/os/contracts/common/SafeERC20.sol", "ast": { "absolutePath": "@aragon/os/contracts/common/SafeERC20.sol", "exportedSymbols": { "SafeERC20": [ 11153 ] }, "id": 11154, "nodeType": "SourceUnit", "nodes": [ { "id": 10910, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "315:24:36" }, { "absolutePath": "@aragon/os/contracts/lib/token/ERC20.sol", "file": "../lib/token/ERC20.sol", "id": 10911, "nodeType": "ImportDirective", "scope": 11154, "sourceUnit": 14295, "src": "341:32:36", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": null, "fullyImplemented": true, "id": 11153, "linearizedBaseContracts": [ 11153 ], "name": "SafeERC20", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 10914, "name": "TRANSFER_SELECTOR", "nodeType": "VariableDeclaration", "scope": 11153, "src": "552:54:36", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 10912, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "552:6:36", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30786139303539636262", "id": 10913, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "596:10:36", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2835717307_by_1", "typeString": "int_const 2835717307" }, "value": "0xa9059cbb" }, "visibility": "private" }, { "constant": true, "id": 10917, "name": "ERROR_TOKEN_BALANCE_REVERTED", "nodeType": "VariableDeclaration", "scope": 11153, "src": "613:85:36", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 10915, "name": "string", "nodeType": "ElementaryTypeName", "src": "613:6:36", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "534146455f4552435f32305f42414c414e43455f5245564552544544", "id": 10916, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "668:30:36", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_e0d6f1573408f815b546b777c74de94d1685d3d390fbf5b918b2e1339b2ed2e7", "typeString": "literal_string \"SAFE_ERC_20_BALANCE_REVERTED\"" }, "value": "SAFE_ERC_20_BALANCE_REVERTED" }, "visibility": "private" }, { "constant": true, "id": 10920, "name": "ERROR_TOKEN_ALLOWANCE_REVERTED", "nodeType": "VariableDeclaration", "scope": 11153, "src": "704:89:36", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory", "typeString": "string" }, "typeName": { "id": 10918, "name": "string", "nodeType": "ElementaryTypeName", "src": "704:6:36", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": { "argumentTypes": null, "hexValue": "534146455f4552435f32305f414c4c4f57414e43455f5245564552544544", "id": 10919, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "761:32:36", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_73432bcf14a5ead3ed39eed7e97b924b49d284054d4f8b41ba74ac90002bc239", "typeString": "literal_string \"SAFE_ERC_20_ALLOWANCE_REVERTED\"" }, "value": "SAFE_ERC_20_ALLOWANCE_REVERTED" }, "visibility": "private" }, { "body": { "id": 10935, "nodeType": "Block", "src": "913:1229:36", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 10930, "name": "ret", "nodeType": "VariableDeclaration", "scope": 10936, "src": "923:8:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 10929, "name": "bool", "nodeType": "ElementaryTypeName", "src": "923:4:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "id": 10931, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "923:8:36" }, { "externalReferences": [ { "_calldata": { "declaration": 10924, "isOffset": false, "isSlot": false, "src": "1281:9:36", "valueSize": 1 } }, { "_calldata": { "declaration": 10924, "isOffset": false, "isSlot": false, "src": "1223:9:36", "valueSize": 1 } }, { "ret": { "declaration": 10930, "isOffset": false, "isSlot": false, "src": "1701:3:36", "valueSize": 1 } }, { "_addr": { "declaration": 10922, "isOffset": false, "isSlot": false, "src": "1120:5:36", "valueSize": 1 } }, { "ret": { "declaration": 10930, "isOffset": false, "isSlot": false, "src": "1952:3:36", "valueSize": 1 } } ], "id": 10932, "nodeType": "InlineAssembly", "operations": "{\n let ptr := mload(0x40)\n let success := call(gas(), _addr, 0, add(_calldata, 0x20), mload(_calldata), ptr, 0x20)\n if gt(success, 0)\n {\n switch returndatasize()\n case 0 {\n ret := 1\n }\n case 0x20 {\n ret := eq(mload(ptr), 1)\n }\n default {\n }\n }\n}", "src": "941:1190:36" }, { "expression": { "argumentTypes": null, "id": 10933, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10930, "src": "2132:3:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 10928, "id": 10934, "nodeType": "Return", "src": "2125:10:36" } ] }, "documentation": null, "id": 10936, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [], "name": "invokeAndCheckSuccess", "nodeType": "FunctionDefinition", "parameters": { "id": 10925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10922, "name": "_addr", "nodeType": "VariableDeclaration", "scope": 10936, "src": "831:13:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10921, "name": "address", "nodeType": "ElementaryTypeName", "src": "831:7:36", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10924, "name": "_calldata", "nodeType": "VariableDeclaration", "scope": 10936, "src": "846:22:36", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 10923, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "846:5:36", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "830:39:36" }, "payable": false, "returnParameters": { "id": 10928, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10927, "name": "", "nodeType": "VariableDeclaration", "scope": 10936, "src": "903:4:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 10926, "name": "bool", "nodeType": "ElementaryTypeName", "src": "903:4:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "902:6:36" }, "scope": 11153, "src": "800:1342:36", "stateMutability": "nonpayable", "superFunction": null, "visibility": "private" }, { "body": { "id": 10958, "nodeType": "Block", "src": "2274:648:36", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 10948, "name": "success", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2284:12:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 10947, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2284:4:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "id": 10949, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "2284:12:36" }, { "assignments": [], "declarations": [ { "constant": false, "id": 10951, "name": "ret", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2306:11:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10950, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2306:7:36", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 10952, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "2306:11:36" }, { "externalReferences": [ { "ret": { "declaration": 10951, "isOffset": false, "isSlot": false, "src": "2844:3:36", "valueSize": 1 } }, { "_calldata": { "declaration": 10940, "isOffset": false, "isSlot": false, "src": "2619:9:36", "valueSize": 1 } }, { "_calldata": { "declaration": 10940, "isOffset": false, "isSlot": false, "src": "2561:9:36", "valueSize": 1 } }, { "success": { "declaration": 10948, "isOffset": false, "isSlot": false, "src": "2412:7:36", "valueSize": 1 } }, { "success": { "declaration": 10948, "isOffset": false, "isSlot": false, "src": "2814:7:36", "valueSize": 1 } }, { "_addr": { "declaration": 10938, "isOffset": false, "isSlot": false, "src": "2508:5:36", "valueSize": 1 } } ], "id": 10953, "nodeType": "InlineAssembly", "operations": "{\n let ptr := mload(0x40)\n success := staticcall(gas(), _addr, add(_calldata, 0x20), mload(_calldata), ptr, 0x20)\n if gt(success, 0)\n {\n ret := mload(ptr)\n }\n}", "src": "2327:573:36" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 10954, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10948, "src": "2902:7:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 10955, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10951, "src": "2911:3:36", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 10956, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "2901:14:36", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_uint256_$", "typeString": "tuple(bool,uint256)" } }, "functionReturnParameters": 10946, "id": 10957, "nodeType": "Return", "src": "2894:21:36" } ] }, "documentation": null, "id": 10959, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "staticInvoke", "nodeType": "FunctionDefinition", "parameters": { "id": 10941, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10938, "name": "_addr", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2170:13:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10937, "name": "address", "nodeType": "ElementaryTypeName", "src": "2170:7:36", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10940, "name": "_calldata", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2185:22:36", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 10939, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "2185:5:36", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "2169:39:36" }, "payable": false, "returnParameters": { "id": 10946, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10943, "name": "", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2255:4:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 10942, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2255:4:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 10945, "name": "", "nodeType": "VariableDeclaration", "scope": 10959, "src": "2261:7:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10944, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2261:7:36", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "2254:15:36" }, "scope": 11153, "src": "2148:774:36", "stateMutability": "view", "superFunction": null, "visibility": "private" }, { "body": { "id": 10984, "nodeType": "Block", "src": "3190:214:36", "statements": [ { "assignments": [ 10971 ], "declarations": [ { "constant": false, "id": 10971, "name": "transferCallData", "nodeType": "VariableDeclaration", "scope": 10985, "src": "3200:29:36", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 10970, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3200:5:36", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 10978, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10974, "name": "TRANSFER_SELECTOR", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10914, "src": "3268:17:36", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "argumentTypes": null, "id": 10975, "name": "_to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10963, "src": "3299:3:36", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 10976, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10965, "src": "3316:7:36", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 10972, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15140, "src": "3232:3:36", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 10973, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3232:22:36", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 10977, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3232:101:36", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "3200:133:36" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 10980, "name": "_token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10961, "src": "3372:6:36", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$14294", "typeString": "contract ERC20" } }, { "argumentTypes": null, "id": 10981, "name": "transferCallData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10971, "src": "3380:16:36", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_ERC20_$14294", "typeString": "contract ERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10979, "name": "invokeAndCheckSuccess", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10936, "src": "3350:21:36", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_bytes_memory_ptr_$returns$_t_bool_$", "typeString": "function (address,bytes memory) returns (bool)" } }, "id": 10982, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3350:47:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 10969, "id": 10983, "nodeType": "Return", "src": "3343:54:36" } ] }, "documentation": "@dev Same as a standards-compliant ERC20.transfer() that never reverts (returns false).\n Note that this makes an external call to the token.", "id": 10985, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [], "name": "safeTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 10966, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10961, "name": "_token", "nodeType": "VariableDeclaration", "scope": 10985, "src": "3122:12:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$14294", "typeString": "contract ERC20" 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"typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10964, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3149:7:36", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "3121:44:36" }, "payable": false, "returnParameters": { "id": 10969, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10968, "name": "", "nodeType": "VariableDeclaration", "scope": 10985, "src": "3184:4:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 10967, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3184:4:36", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3183:6:36" }, "scope": 11153, "src": "3100:304:36", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": { "id": 11015, "nodeType": "Block", "src": "3695:252:36", "statements": [ { "assignments": [ 10999 ], "declarations": [ { "constant": false, "id": 10999, "name": "transferFromCallData", "nodeType": "VariableDeclaration", "scope": 11016, "src": "3705:33:36", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 10998, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3705:5:36", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 11009, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 11002, "name": "_token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10987, "src": "3777:6:36", "typeDescriptions": { "typeIdentifier": "t_contract$_ERC20_$14294", "typeString": "contract ERC20" } }, "id": 11003, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transferFrom", "nodeType": "MemberAccess", "referencedDeclaration": 14277, "src": "3777:19:36", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,addr