{ "contractName": "DNSResolver", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "name": "node", "type": "bytes32" }, { "indexed": false, "name": "name", "type": "bytes" }, { "indexed": false, "name": "resource", "type": "uint16" }, { "indexed": false, "name": "record", "type": "bytes" } ], "name": "DNSRecordChanged", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "node", "type": "bytes32" }, { "indexed": false, "name": "name", "type": "bytes" }, { "indexed": false, "name": "resource", "type": "uint16" } ], "name": "DNSRecordDeleted", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "node", "type": "bytes32" } ], "name": "DNSZoneCleared", "type": "event" }, { "constant": false, "inputs": [ { "name": "node", "type": "bytes32" }, { "name": "data", "type": "bytes" } ], "name": "setDNSRecords", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "node", "type": "bytes32" }, { "name": "name", "type": "bytes32" }, { "name": "resource", "type": "uint16" } ], "name": "dnsRecord", "outputs": [ { "name": "", "type": "bytes" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "node", "type": "bytes32" }, { "name": "name", "type": "bytes32" } ], "name": "hasDNSRecords", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "node", "type": "bytes32" } ], "name": "clearDNSZone", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "interfaceID", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "pure", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.8+commit.23d335f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"constant\":true,\"inputs\":[{\"name\":\"interfaceID\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"node\",\"type\":\"bytes32\"},{\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"setDNSRecords\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"node\",\"type\":\"bytes32\"},{\"name\":\"name\",\"type\":\"bytes32\"}],\"name\":\"hasDNSRecords\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"node\",\"type\":\"bytes32\"},{\"name\":\"name\",\"type\":\"bytes32\"},{\"name\":\"resource\",\"type\":\"uint16\"}],\"name\":\"dnsRecord\",\"outputs\":[{\"name\":\"\",\"type\":\"bytes\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"node\",\"type\":\"bytes32\"}],\"name\":\"clearDNSZone\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"node\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"name\",\"type\":\"bytes\"},{\"indexed\":false,\"name\":\"resource\",\"type\":\"uint16\"},{\"indexed\":false,\"name\":\"record\",\"type\":\"bytes\"}],\"name\":\"DNSRecordChanged\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"node\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"name\",\"type\":\"bytes\"},{\"indexed\":false,\"name\":\"resource\",\"type\":\"uint16\"}],\"name\":\"DNSRecordDeleted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"node\",\"type\":\"bytes32\"}],\"name\":\"DNSZoneCleared\",\"type\":\"event\"}],\"devdoc\":{\"methods\":{\"clearDNSZone(bytes32)\":{\"params\":{\"node\":\"the namehash of the node for which to clear the zone\"}},\"dnsRecord(bytes32,bytes32,uint16)\":{\"params\":{\"name\":\"the keccak-256 hash of the fully-qualified name for which to fetch the record\",\"node\":\"the namehash of the node for which to fetch the record\",\"resource\":\"the ID of the resource as per https://en.wikipedia.org/wiki/List_of_DNS_record_types\"},\"return\":\"the DNS record in wire format if present, otherwise empty\"},\"hasDNSRecords(bytes32,bytes32)\":{\"params\":{\"name\":\"the namehash of the node for which to check the records\",\"node\":\"the namehash of the node for which to check the records\"}},\"setDNSRecords(bytes32,bytes)\":{\"params\":{\"data\":\"the DNS wire format records to set\",\"node\":\"the namehash of the node for which to set the records\"}}}},\"userdoc\":{\"methods\":{\"clearDNSZone(bytes32)\":{\"notice\":\"Clear all information for a DNS zone.\"},\"dnsRecord(bytes32,bytes32,uint16)\":{\"notice\":\"Obtain a DNS record.\"},\"hasDNSRecords(bytes32,bytes32)\":{\"notice\":\"Check if a given node has records.\"},\"setDNSRecords(bytes32,bytes)\":{\"notice\":\"Set one or more DNS records. Records are supplied in wire-format. Records with the same node/name/resource must be supplied one after the other to ensure the data is updated correctly. For example, if the data was supplied: a.example.com IN A 1.2.3.4 a.example.com IN A 5.6.7.8 www.example.com IN CNAME a.example.com. then this would store the two A records for a.example.com correctly as a single RRSET, however if the data was supplied: a.example.com IN A 1.2.3.4 www.example.com IN CNAME a.example.com. a.example.com IN A 5.6.7.8 then this would store the first A record, the CNAME, then the second A record which would overwrite the first.\"}}}},\"settings\":{\"compilationTarget\":{\"/home/user/Dropbox/projects/resolvers/contracts/profiles/DNSResolver.sol\":\"DNSResolver\"},\"evmVersion\":\"petersburg\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/user/Dropbox/projects/resolvers/contracts/ResolverBase.sol\":{\"keccak256\":\"0xfc7d550960829127576d6fc3080513d74ef18a6d7057d0d9262ce071890053e8\",\"urls\":[\"bzzr://81e5565403a67f558d12c787f53f40ff19a5da99c648f8a4f99f2caa449ca0e6\"]},\"/home/user/Dropbox/projects/resolvers/contracts/profiles/DNSResolver.sol\":{\"keccak256\":\"0x51534f5ebdcfda403b1a935f256e7f27d16b490e5b023b6e57877973daf9a4d4\",\"urls\":[\"bzzr://a81c189814102f6debd761795650d94694225b7486d490faf7d5fb6e0704ed28\"]},\"@ensdomains/buffer/contracts/Buffer.sol\":{\"keccak256\":\"0x1264adbd06f6e05b04539bb225063a988b7fa90343d068de60cdde6cfb6fa92d\",\"urls\":[\"bzzr://8f1cb39e242b73bb7fac1f48bf0380ccccad14f06aae9cf4f87329cc78186122\"]},\"@ensdomains/dnssec-oracle/contracts/BytesUtils.sol\":{\"keccak256\":\"0x4014e689ef4a36cbf7103d88286abd2a7c560c2a7af99a561c33c61bc78be27a\",\"urls\":[\"bzzr://adf984996598f1e0d446eea1eda14ed2c49ab86a4ea1ae837cf4f9d99556b9c2\"]},\"@ensdomains/dnssec-oracle/contracts/RRUtils.sol\":{\"keccak256\":\"0x5135591043cf38413b19f93d16f189f0f8b50b01b78642fb764635d9790cc7ca\",\"urls\":[\"bzzr://7e3a0111306a7c5640e213da22bcfac1e42b813e8d4d99ef7ea33c09747049fc\"]}},\"version\":1}", "bytecode": "0x", "deployedBytecode": "0x", "sourceMap": "", "deployedSourceMap": "", "source": "pragma solidity ^0.5.0;\n\nimport \"../ResolverBase.sol\";\nimport \"@ensdomains/dnssec-oracle/contracts/RRUtils.sol\";\n\ncontract DNSResolver is ResolverBase {\n using RRUtils for *;\n using BytesUtils for bytes;\n\n bytes4 constant private DNS_RECORD_INTERFACE_ID = 0xa8fa5682;\n\n // DNSRecordChanged is emitted whenever a given node/name/resource's RRSET is updated.\n event DNSRecordChanged(bytes32 indexed node, bytes name, uint16 resource, bytes record);\n // DNSRecordDeleted is emitted whenever a given node/name/resource's RRSET is deleted.\n event DNSRecordDeleted(bytes32 indexed node, bytes name, uint16 resource);\n // DNSZoneCleared is emitted whenever a given node's zone information is cleared.\n event DNSZoneCleared(bytes32 indexed node);\n\n // Version the mapping for each zone. This allows users who have lost\n // track of their entries to effectively delete an entire zone by bumping\n // the version number.\n // node => version\n mapping(bytes32=>uint256) private versions;\n\n // The records themselves. Stored as binary RRSETs\n // node => version => name => resource => data\n mapping(bytes32=>mapping(uint256=>mapping(bytes32=>mapping(uint16=>bytes)))) private records;\n\n // Count of number of entries for a given name. Required for DNS resolvers\n // when resolving wildcards.\n // node => version => name => number of records\n mapping(bytes32=>mapping(uint256=>mapping(bytes32=>uint16))) private nameEntriesCount;\n\n /**\n * Set one or more DNS records. Records are supplied in wire-format.\n * Records with the same node/name/resource must be supplied one after the\n * other to ensure the data is updated correctly. For example, if the data\n * was supplied:\n * a.example.com IN A 1.2.3.4\n * a.example.com IN A 5.6.7.8\n * www.example.com IN CNAME a.example.com.\n * then this would store the two A records for a.example.com correctly as a\n * single RRSET, however if the data was supplied:\n * a.example.com IN A 1.2.3.4\n * www.example.com IN CNAME a.example.com.\n * a.example.com IN A 5.6.7.8\n * then this would store the first A record, the CNAME, then the second A\n * record which would overwrite the first.\n *\n * @param node the namehash of the node for which to set the records\n * @param data the DNS wire format records to set\n */\n function setDNSRecords(bytes32 node, bytes calldata data) external authorised(node) {\n uint16 resource = 0;\n uint256 offset = 0;\n bytes memory name;\n bytes memory value;\n bytes32 nameHash;\n // Iterate over the data to add the resource records\n for (RRUtils.RRIterator memory iter = data.iterateRRs(0); !iter.done(); iter.next()) {\n if (resource == 0) {\n resource = iter.dnstype;\n name = iter.name();\n nameHash = keccak256(abi.encodePacked(name));\n value = bytes(iter.rdata());\n } else {\n bytes memory newName = iter.name();\n if (resource != iter.dnstype || !name.equals(newName)) {\n setDNSRRSet(node, name, resource, data, offset, iter.offset - offset, value.length == 0);\n resource = iter.dnstype;\n offset = iter.offset;\n name = newName;\n nameHash = keccak256(name);\n value = bytes(iter.rdata());\n }\n }\n }\n if (name.length > 0) {\n setDNSRRSet(node, name, resource, data, offset, data.length - offset, value.length == 0);\n }\n }\n\n /**\n * Obtain a DNS record.\n * @param node the namehash of the node for which to fetch the record\n * @param name the keccak-256 hash of the fully-qualified name for which to fetch the record\n * @param resource the ID of the resource as per https://en.wikipedia.org/wiki/List_of_DNS_record_types\n * @return the DNS record in wire format if present, otherwise empty\n */\n function dnsRecord(bytes32 node, bytes32 name, uint16 resource) public view returns (bytes memory) {\n return records[node][versions[node]][name][resource];\n }\n\n /**\n * Check if a given node has records.\n * @param node the namehash of the node for which to check the records\n * @param name the namehash of the node for which to check the records\n */\n function hasDNSRecords(bytes32 node, bytes32 name) public view returns (bool) {\n return (nameEntriesCount[node][versions[node]][name] != 0);\n }\n\n /**\n * Clear all information for a DNS zone.\n * @param node the namehash of the node for which to clear the zone\n */\n function clearDNSZone(bytes32 node) public authorised(node) {\n versions[node]++;\n emit DNSZoneCleared(node);\n }\n\n function supportsInterface(bytes4 interfaceID) public pure returns(bool) {\n return interfaceID == DNS_RECORD_INTERFACE_ID || super.supportsInterface(interfaceID);\n }\n\n function setDNSRRSet(\n bytes32 node,\n bytes memory name,\n uint16 resource,\n bytes memory data,\n uint256 offset,\n uint256 size,\n bool deleteRecord) private\n {\n uint256 version = versions[node];\n bytes32 nameHash = keccak256(name);\n bytes memory rrData = data.substring(offset, size);\n if (deleteRecord) {\n if (records[node][version][nameHash][resource].length != 0) {\n nameEntriesCount[node][version][nameHash]--;\n }\n delete(records[node][version][nameHash][resource]);\n emit DNSRecordDeleted(node, name, resource);\n } else {\n if (records[node][version][nameHash][resource].length == 0) {\n nameEntriesCount[node][version][nameHash]++;\n }\n records[node][version][nameHash][resource] = rrData;\n emit DNSRecordChanged(node, name, resource, rrData);\n }\n }\n}\n", "sourcePath": "/home/user/Dropbox/projects/resolvers/contracts/profiles/DNSResolver.sol", "ast": { "absolutePath": "/home/user/Dropbox/projects/resolvers/contracts/profiles/DNSResolver.sol", "exportedSymbols": { "DNSResolver": [ 1458 ] }, "id": 1459, "nodeType": "SourceUnit", "nodes": [ { "id": 1029, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:9" }, { "absolutePath": "/home/user/Dropbox/projects/resolvers/contracts/ResolverBase.sol", "file": "../ResolverBase.sol", "id": 1030, "nodeType": "ImportDirective", "scope": 1459, "sourceUnit": 663, "src": "25:29:9", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@ensdomains/dnssec-oracle/contracts/RRUtils.sol", "file": "@ensdomains/dnssec-oracle/contracts/RRUtils.sol", "id": 1031, "nodeType": "ImportDirective", "scope": 1459, "sourceUnit": 3703, "src": "55:57:9", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 1032, "name": "ResolverBase", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 662, "src": "138:12:9", "typeDescriptions": { "typeIdentifier": "t_contract$_ResolverBase_$662", "typeString": "contract ResolverBase" } }, "id": 1033, "nodeType": "InheritanceSpecifier", "src": "138:12:9" } ], "contractDependencies": [ 662 ], "contractKind": "contract", "documentation": null, "fullyImplemented": false, "id": 1458, "linearizedBaseContracts": [ 1458, 662 ], "name": "DNSResolver", "nodeType": "ContractDefinition", "nodes": [ { "id": 1035, "libraryName": { "contractScope": null, "id": 1034, "name": "RRUtils", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3702, "src": "163:7:9", "typeDescriptions": { "typeIdentifier": "t_contract$_RRUtils_$3702", "typeString": "library RRUtils" } }, "nodeType": "UsingForDirective", "src": "157:20:9", "typeName": null }, { "id": 1038, "libraryName": { "contractScope": null, "id": 1036, "name": "BytesUtils", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3081, "src": "188:10:9", "typeDescriptions": { "typeIdentifier": "t_contract$_BytesUtils_$3081", "typeString": "library BytesUtils" } }, "nodeType": "UsingForDirective", "src": "182:27:9", "typeName": { "id": 1037, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "203:5:9", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } } }, { "constant": true, "id": 1041, "name": "DNS_RECORD_INTERFACE_ID", "nodeType": "VariableDeclaration", "scope": 1458, "src": "215:60:9", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 1039, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "215:6:9", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30786138666135363832", "id": 1040, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "265:10:9", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2834978434_by_1", "typeString": "int_const 2834978434" }, "value": "0xa8fa5682" }, "visibility": "private" }, { "anonymous": false, "documentation": 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"bytes32", "nodeType": "ElementaryTypeName", "src": "982:7:9", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "Mapping", "src": "974:25:9", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_uint256_$", "typeString": "mapping(bytes32 => uint256)" }, "valueType": { "id": 1065, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "991:7:9", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "value": null, "visibility": "private" }, { "constant": false, "id": 1077, "name": "records", "nodeType": "VariableDeclaration", "scope": 1458, "src": "1130:92:9", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_uint256_$_t_mapping$_t_bytes32_$_t_mapping$_t_uint16_$_t_bytes_storage_$_$_$_$", "typeString": "mapping(bytes32 => mapping(uint256 => mapping(bytes32 => mapping(uint16 => bytes))))" }, "typeName": { "id": 1076, 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"parameters": [], "src": "5265:0:9" }, "scope": 1458, "src": "5057:965:9", "stateMutability": "nonpayable", "superFunction": null, "visibility": "private" } ], "scope": 1459, "src": "114:5910:9" } ], "src": "0:6025:9" }, "compiler": { "name": "solc", "version": "0.5.8+commit.23d335f2.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.0.16", "updatedAt": "2020-02-10T18:46:21.032Z", "devdoc": { "methods": { "clearDNSZone(bytes32)": { "params": { "node": "the namehash of the node for which to clear the zone" } }, "dnsRecord(bytes32,bytes32,uint16)": { "params": { "name": "the keccak-256 hash of the fully-qualified name for which to fetch the record", "node": "the namehash of the node for which to fetch the record", "resource": "the ID of the resource as per https://en.wikipedia.org/wiki/List_of_DNS_record_types" }, "return": "the DNS record in wire format if present, otherwise empty" }, "hasDNSRecords(bytes32,bytes32)": { "params": { "name": "the namehash of the node for which to check the records", "node": "the namehash of the node for which to check the records" } }, "setDNSRecords(bytes32,bytes)": { "params": { "data": "the DNS wire format records to set", "node": "the namehash of the node for which to set the records" } } } }, "userdoc": { "methods": { "clearDNSZone(bytes32)": { "notice": "Clear all information for a DNS zone." }, "dnsRecord(bytes32,bytes32,uint16)": { "notice": "Obtain a DNS record." }, "hasDNSRecords(bytes32,bytes32)": { "notice": "Check if a given node has records." }, "setDNSRecords(bytes32,bytes)": { "notice": "Set one or more DNS records. 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