{ "contractName": "AddressUtils", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.4.24+commit.e67f0147\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"/Users/chtian/Documents/01_work/01_develope/jcc/jcc-solidity-utils/contracts/utils/AddressUtils.sol\":\"AddressUtils\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/Users/chtian/Documents/01_work/01_develope/jcc/jcc-solidity-utils/contracts/utils/AddressUtils.sol\":{\"keccak256\":\"0xe78f03563026c72cf447b8ce7839eb34f512b4698e52253da52d568094f20c89\",\"urls\":[\"bzzr://15282c513ef8c6bb7000a0abf864675306e22ec0425639eb0f0c1f91bb2a4b92\"]}},\"version\":1}", "bytecode": "0x604c602c600b82828239805160001a60731460008114601c57601e565bfe5b5030600052607381538281f30073000000000000000000000000000000000000000030146080604052600080fd00a165627a7a72305820ff98d4053989dcb7b7a9459b0f94f439dd501a1998ed694d850f477cfee3b3ce0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fd00a165627a7a72305820ff98d4053989dcb7b7a9459b0f94f439dd501a1998ed694d850f477cfee3b3ce0029", "sourceMap": "93:1886:31:-;;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": "93:1886:31:-;;;;;;;;", "source": "pragma solidity >=0.4.24;\n\n/**\n * @dev Utility library of inline functions on addresses.\n */\nlibrary AddressUtils {\n /**\n * @dev Returns whether the target address is a contract.\n * @param _addr Address to check.\n */\n function isContract(address _addr) internal view returns (bool) {\n uint256 size;\n\n /**\n * XXX Currently there is no better way to check if there is a contract in an address than to\n * check the size of the code at that address.\n * See https://ethereum.stackexchange.com/a/14016/36603 for more details about how this works.\n * TODO: Check this again before the Serenity release, because all addresses will be\n * contracts then.\n */\n assembly {\n size := extcodesize(_addr)\n } // solium-disable-line security/no-inline-assembly\n return size > 0;\n }\n\n function isZeroAddress(address _addr) internal pure returns (bool) {\n return _addr == address(0);\n }\n\n // 使用toString，因为js重载导致无法正常执行\n function getString(address _addr) internal pure returns (string memory) {\n bytes32 value = bytes32(uint256(_addr));\n bytes memory alphabet = \"0123456789abcdef\";\n\n bytes memory str = new bytes(42);\n str[0] = \"0\";\n str[1] = \"x\";\n for (uint256 i = 0; i < 20; i++) {\n str[2 + i * 2] = alphabet[uint256(uint8(value[i + 12] >> 4))];\n str[3 + i * 2] = alphabet[uint256(uint8(value[i + 12] & 0x0f))];\n }\n\n return string(str);\n }\n\n function fromString(address _addr, string memory _str)\n internal\n pure\n returns (address)\n {\n bytes memory b = bytes(_str);\n\n uint256 result = 0;\n for (uint256 i = 0; i < b.length; i++) {\n uint256 c = uint256(uint8(b[i]));\n if (c >= 48 && c <= 57) {\n result = result * 16 + (c - 48);\n }\n if (c >= 65 && c <= 90) {\n result = result * 16 + (c - 55);\n }\n if (c >= 97 && c <= 122) {\n result = result * 16 + (c - 87);\n }\n }\n\n return address(result);\n }\n}\n", "sourcePath": "/Users/chtian/Documents/01_work/01_develope/jcc/jcc-solidity-utils/contracts/utils/AddressUtils.sol", "ast": { "absolutePath": "/Users/chtian/Documents/01_work/01_develope/jcc/jcc-solidity-utils/contracts/utils/AddressUtils.sol", "exportedSymbols": { "AddressUtils": [ 6969 ] }, "id": 6970, "nodeType": "SourceUnit", "nodes": [ { "id": 6732, "literals": [ "solidity", ">=", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:25:31" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "@dev Utility library of inline functions on addresses.", "fullyImplemented": true, "id": 6969, "linearizedBaseContracts": [ 6969 ], "name": "AddressUtils", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 6747, "nodeType": "Block", "src": "290:526:31", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 6740, "name": "size", "nodeType": "VariableDeclaration", "scope": 6748, "src": "296:12:31", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 6739, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "296:7:31", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 6741, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": 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false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "810:1:31", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "803:8:31", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 6738, "id": 6746, "nodeType": "Return", "src": "796:15:31" } ] }, "documentation": "@dev Returns whether the target address is a contract.\n@param _addr Address to check.", "id": 6748, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "isContract", "nodeType": "FunctionDefinition", "parameters": { "id": 6735, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 6734, "name": "_addr", "nodeType": "VariableDeclaration", "scope": 6748, "src": "246:13:31", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", 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