{ "contractName": "FIFSRegistrar", "abi": [ { "inputs": [ { "internalType": "contract ENS", "name": "ensAddr", "type": "address" }, { "internalType": "bytes32", "name": "node", "type": "bytes32" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "constant": false, "inputs": [ { "internalType": "bytes32", "name": "label", "type": "bytes32" }, { "internalType": "address", "name": "owner", "type": "address" } ], "name": "register", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.16+commit.9c3226ce\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"contract ENS\",\"name\":\"ensAddr\",\"type\":\"address\"},{\"internalType\":\"bytes32\",\"name\":\"node\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"label\",\"type\":\"bytes32\"},{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"register\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"methods\":{\"constructor\":{\"params\":{\"ensAddr\":\"The address of the ENS registry.\",\"node\":\"The node that this registrar administers.\"}},\"register(bytes32,address)\":{\"params\":{\"label\":\"The hash of the label to register.\",\"owner\":\"The address of the new owner.\"}}}},\"userdoc\":{\"methods\":{\"constructor\":\"Constructor.\",\"register(bytes32,address)\":{\"notice\":\"Register a name, or change the owner of an existing registration.\"}},\"notice\":\"A registrar that allocates subdomains to the first person to claim them.\"}},\"settings\":{\"compilationTarget\":{\"/Users/makoto/work/ens/ens/contracts/FIFSRegistrar.sol\":\"FIFSRegistrar\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"/Users/makoto/work/ens/ens/contracts/ENS.sol\":{\"keccak256\":\"0x10b88673d8c180cd62523be4fec7607c65594eb4f0c561fa0fbc0784422b4871\",\"urls\":[\"bzz-raw://b3de1882a4a1a1b13c27ee6dc04cc58c34ac392c80cad507de2cdfa8c02712fe\",\"dweb:/ipfs/QmeKcaBF8QdJjXiqFrPJkAtK3et5kUL8XJrnHjwhAThRMT\"]},\"/Users/makoto/work/ens/ens/contracts/FIFSRegistrar.sol\":{\"keccak256\":\"0xee608fdeeea6d7c0e6cb5d69b27a0e6c0658fad024c31ab56d52ccd8c7c0fcd5\",\"urls\":[\"bzz-raw://b81fc1330b804af1f0a0cc0cbe00b6c95fffe113c656c2db353893b0e448be9a\",\"dweb:/ipfs/QmcXnnD4uLw3wxceFhWahicL36kG15t9rnpBhMfem93Uhs\"]}},\"version\":1}", "bytecode": 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subdomains to the first person to claim them.\n */\ncontract FIFSRegistrar {\n ENS ens;\n bytes32 rootNode;\n\n modifier only_owner(bytes32 label) {\n address currentOwner = ens.owner(keccak256(abi.encodePacked(rootNode, label)));\n require(currentOwner == address(0x0) || currentOwner == msg.sender);\n _;\n }\n\n /**\n * Constructor.\n * @param ensAddr The address of the ENS registry.\n * @param node The node that this registrar administers.\n */\n constructor(ENS ensAddr, bytes32 node) public {\n ens = ensAddr;\n rootNode = node;\n }\n\n /**\n * Register a name, or change the owner of an existing registration.\n * @param label The hash of the label to register.\n * @param owner The address of the new owner.\n */\n function register(bytes32 label, address owner) public only_owner(label) {\n ens.setSubnodeOwner(rootNode, label, owner);\n }\n}\n", "sourcePath": "/Users/makoto/work/ens/ens/contracts/FIFSRegistrar.sol", "ast": { "absolutePath": "/Users/makoto/work/ens/ens/contracts/FIFSRegistrar.sol", "exportedSymbols": { "FIFSRegistrar": [ 1030 ] }, "id": 1031, "nodeType": "SourceUnit", "nodes": [ { "id": 957, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:5" }, { "absolutePath": "/Users/makoto/work/ens/ens/contracts/ENS.sol", "file": "./ENS.sol", "id": 958, "nodeType": "ImportDirective", "scope": 1031, "sourceUnit": 437, "src": "25:19:5", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": "A registrar that allocates subdomains to the first person to claim them.", "fullyImplemented": true, "id": 1030, "linearizedBaseContracts": [ 1030 ], "name": "FIFSRegistrar", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 960, "name": "ens", "nodeType": "VariableDeclaration", "scope": 1030, "src": "159:7:5", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_ENS_$436", "typeString": "contract ENS" }, "typeName": { "contractScope": null, "id": 959, "name": "ENS", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 436, "src": "159:3:5", "typeDescriptions": { "typeIdentifier": "t_contract$_ENS_$436", "typeString": "contract ENS" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 962, "name": "rootNode", "nodeType": "VariableDeclaration", "scope": 1030, "src": "172:16:5", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 961, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "172:7:5", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "body": { "id": 993, "nodeType": "Block", "src": "230:183:5", "statements": [ { "assignments": [ 967 ], "declarations": [ { "constant": false, "id": 967, "name": 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"name": "ens", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 960, "src": "263:3:5", "typeDescriptions": { "typeIdentifier": "t_contract$_ENS_$436", "typeString": "contract ENS" } }, "id": 969, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "owner", "nodeType": "MemberAccess", "referencedDeclaration": 405, "src": "263:9:5", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32) view external returns (address)" } }, "id": 977, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "263:55:5", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "240:78:5" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, 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