Line data    Source code

       1              : import 'dart:typed_data';
       2              : 
       3              : import 'package:walletkit_dart/src/utils/keccak.dart';
       4              : import 'package:walletkit_dart/walletkit_dart.dart';
       5              : 
       6            3 : final ensRegistryAbi = ContractABI.fromAbi(
       7              :     '''[{"inputs":[{"internalType":"contract ENS","name":"_old","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"label","type":"bytes32"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"NewOwner","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"address","name":"resolver","type":"address"}],"name":"NewResolver","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"uint64","name":"ttl","type":"uint64"}],"name":"NewTTL","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"node","type":"bytes32"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"Transfer","type":"event"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"old","outputs":[{"internalType":"contract ENS","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"recordExists","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"resolver","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"uint64","name":"ttl","type":"uint64"}],"name":"setRecord","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"address","name":"resolver","type":"address"}],"name":"setResolver","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"label","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"}],"name":"setSubnodeOwner","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"bytes32","name":"label","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"uint64","name":"ttl","type":"uint64"}],"name":"setSubnodeRecord","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"},{"internalType":"uint64","name":"ttl","type":"uint64"}],"name":"setTTL","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"node","type":"bytes32"}],"name":"ttl","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"payable":false,"stateMutability":"view","type":"function"}]''');
       8              : 
       9              : const ensRegistryMainnetContractAddress = "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e";
      10              : 
      11              : const znsRegistryContractAddress = "0xa0446c88240bCA2A8E0f68C93aa365d25B198aA4";
      12              : 
      13              : class EnsRegistryContract extends InternalContract {
      14            1 :   EnsRegistryContract({
      15              :     required super.contractAddress,
      16              :     required super.rpc,
      17            1 :   }) : super(
      18            1 :           abi: ensRegistryAbi,
      19              :         );
      20              : 
      21            1 :   factory EnsRegistryContract.mainnet({required EvmRpcInterface rpc}) {
      22            1 :     return EnsRegistryContract(
      23              :       contractAddress: ensRegistryMainnetContractAddress,
      24              :       rpc: rpc,
      25              :     );
      26              :   }
      27              : 
      28            0 :   factory EnsRegistryContract.smartchain({required EvmRpcInterface rpc}) {
      29            0 :     return EnsRegistryContract(
      30              :       contractAddress: znsRegistryContractAddress,
      31              :       rpc: rpc,
      32              :     );
      33              :   }
      34              : 
      35            1 :   Future<String?> resolver({required String name}) async {
      36            2 :     final function = abi.getFunction('resolver')!;
      37              : 
      38            1 :     final node = namehash(name);
      39              : 
      40              :     try {
      41            1 :       final result = await readSafe(
      42            2 :         function: function.addValues(values: [node]),
      43              :       );
      44              : 
      45            3 :       final resolver = result.outputs.first.value as String;
      46            1 :       if (resolver == nullAddress) {
      47              :         return null;
      48              :       }
      49              :       return resolver;
      50            1 :     } on RangeError {
      51              :       return null;
      52              :     }
      53              :   }
      54              : }
      55              : 
      56            1 : Uint8List namehash(String name) {
      57            1 :   if (name.isEmpty) {
      58            0 :     return Uint8List(32);
      59              :   }
      60              : 
      61              :   List<int> node;
      62            1 :   if (name.contains('.')) {
      63            1 :     var labels = name.split('.');
      64            3 :     node = namehash(labels.sublist(1).join('.'));
      65              :   } else {
      66            1 :     node = Uint8List(32);
      67              :   }
      68              : 
      69            2 :   var label = name.split('.')[0];
      70            3 :   var labelHash = keccak256(Uint8List.fromList(label.codeUnits));
      71              : 
      72            4 :   return keccak256(Uint8List.fromList([...node, ...labelHash]));
      73              : }