{ "contractName": "Namehash", "abi": [ { "anonymous": false, "inputs": [ { "indexed": false, "name": "", "type": "uint256" } ], "name": "I", "type": "event" }, { "constant": true, "inputs": [ { "name": "name", "type": "string" } ], "name": "hash", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "pure", "type": "function" } ], "metadata": 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"source": "pragma solidity ^0.5.2;\n\nimport \"./Strings.sol\";\n\ncontract Namehash {\n using Strings for *;\n\n event I(uint);\n\n function hash (string memory name) public pure returns (bytes32) {\n bytes32 node = 0x0000000000000000000000000000000000000000000000000000000000000000;\n\n if (bytes(name).length == 0) {\n return node;\n }\n\n Strings.slice memory s = name.toSlice();\n Strings.slice memory delim = \".\".toSlice();\n string[] memory parts = new string[](s.count(delim) + 1);\n\n uint i;\n\n for(i = 0; i < parts.length; i++) {\n parts[i] = s.split(delim).toString();\n }\n\n for(i = 0; i < parts.length; i++) {\n string memory part = parts[parts.length - i - 1];\n bytes32 label = keccak256(bytes(part));\n node = keccak256(abi.encodePacked(node, label));\n }\n\n return node;\n }\n}", "sourcePath": "/Users/ilanolkies/code/rnsdomains/rns-artifacts/contracts/util/Namehash.sol", "ast": { "absolutePath": "/Users/ilanolkies/code/rnsdomains/rns-artifacts/contracts/util/Namehash.sol", "exportedSymbols": { "Namehash": [ 1911 ] }, "id": 1912, "nodeType": "SourceUnit", "nodes": [ { "id": 1779, "literals": [ "solidity", "^", "0.5", ".2" ], "nodeType": "PragmaDirective", "src": "0:23:14" }, { "absolutePath": "/Users/ilanolkies/code/rnsdomains/rns-artifacts/contracts/util/Strings.sol", "file": "./Strings.sol", "id": 1780, "nodeType": "ImportDirective", "scope": 1912, "sourceUnit": 2359, "src": "25:23:14", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 1911, "linearizedBaseContracts": [ 1911 ], "name": "Namehash", "nodeType": "ContractDefinition", "nodes": [ { "id": 1782, "libraryName": { "contractScope": null, "id": 1781, "name": "Strings", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2358, "src": "80:7:14", "typeDescriptions": { "typeIdentifier": "t_contract$_Strings_$2358", "typeString": "library Strings" } }, "nodeType": "UsingForDirective", "src": "74:20:14", "typeName": null }, { "anonymous": false, "documentation": null, "id": 1786, "name": "I", "nodeType": "EventDefinition", "parameters": { "id": 1785, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1784, "indexed": false, "name": "", "nodeType": "VariableDeclaration", "scope": 1786, "src": "108:4:14", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1783, "name": "uint", "nodeType": "ElementaryTypeName", "src": "108:4:14", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "107:6:14" }, "src": "100:14:14" }, { "body": { "id": 1909, "nodeType": "Block", "src": "185:715:14", "statements": [ { "assignments": [ 1794 ], "declarations": [ { "constant": false, "id": 1794, "name": "node", "nodeType": "VariableDeclaration", "scope": 1909, "src": "195:12:14", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 1793, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "195:7:14", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 1796, "initialValue": { "argumentTypes": null, "hexValue": "307830303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030303030", "id": 1795, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "210:66:14", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0x0000000000000000000000000000000000000000000000000000000000000000" }, "nodeType": "VariableDeclarationStatement", "src": "195:81:14" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1802, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1798, "name": "name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1788, "src": "297:4:14", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } ], "id": 1797, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "291:5:14", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes_storage_ptr_$", "typeString": "type(bytes storage pointer)" }, "typeName": "bytes" }, "id": 1799, 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