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@ -21,7 +21,7 @@ extension String { |
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} |
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} |
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class GetENSOwnerCoordinator { |
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class GetENSAddressCoordinator { |
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private struct ENSLookupKey: Hashable { |
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let name: String |
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let server: RPCServer |
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@ -37,7 +37,7 @@ class GetENSOwnerCoordinator { |
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self.server = server |
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} |
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func getENSOwner( |
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func getENSAddressFromResolver( |
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for input: String, |
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completion: @escaping (Result<EthereumAddress, AnyError>) -> Void |
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) { |
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@ -60,21 +60,34 @@ class GetENSOwnerCoordinator { |
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return |
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} |
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let function = GetENSOwnerEncode() |
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let function = GetENSResolverEncode() |
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guard let ensRegistrarContract = Address(string: server.ensRegistrarContract.address) else { |
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completion(.failure(AnyError(Web3Error(description: "Error converting contract address: \(server.ensRegistrarContract.address)")))) |
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return |
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} |
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callSmartContract(withServer: server, contract: ensRegistrarContract, functionName: function.name, abiString: "[\(function.abi)]", parameters: [node] as [AnyObject]).done { result in |
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callSmartContract(withServer: server, contract: ensRegistrarContract, functionName: function.name, abiString: function.abi, parameters: [node] as [AnyObject]).done { result in |
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//if null address is returned (as 0) we count it as invalid |
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//this is because it is not assigned to an ENS and puts the user in danger of sending funds to null |
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if let owner = result["0"] as? EthereumAddress { |
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if owner.address == Constants.nullAddress { |
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if let resolver = result["0"] as? EthereumAddress { |
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if resolver.address == Constants.nullAddress { |
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completion(.failure(AnyError(Web3Error(description: "Null address returned")))) |
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} else { |
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//Retain self because it's useful to cache the results even if we don't immediately need it now |
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self.cache(forNode: node, result: owner) |
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completion(.success(owner)) |
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let function = GetENSRecordFromResolverEncode() |
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//TODO remove Address as a type because EthereumAddress co-exists or vice versa |
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callSmartContract(withServer: self.server, contract: Address(string: resolver.address)!, functionName: function.name, abiString: function.abi, parameters: [node] as [AnyObject]).done { result in |
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if let ensAddress = result["0"] as? EthereumAddress { |
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if ensAddress.address == Constants.nullAddress { |
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completion(.failure(AnyError(Web3Error(description: "Null address returned")))) |
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} else { |
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//Retain self because it's useful to cache the results even if we don't immediately need it now |
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self.cache(forNode: node, result: ensAddress) |
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completion(.success(ensAddress)) |
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} |
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} else { |
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completion(.failure(AnyError(Web3Error(description: "Incorrect data output from ENS resolver")))) |
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} |
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} |
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} |
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} else { |
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completion(.failure(AnyError(Web3Error(description: "Error extracting result from \(ensRegistrarContract).\(function.name)()")))) |
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@ -92,19 +105,19 @@ class GetENSOwnerCoordinator { |
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} |
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toStartResolvingEnsNameTimer?.invalidate() |
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toStartResolvingEnsNameTimer = Timer.scheduledTimer(withTimeInterval: GetENSOwnerCoordinator.DELAY_AFTER_STOP_TYPING_TO_START_RESOLVING_ENS_NAME, repeats: false) { _ in |
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toStartResolvingEnsNameTimer = Timer.scheduledTimer(withTimeInterval: GetENSAddressCoordinator.DELAY_AFTER_STOP_TYPING_TO_START_RESOLVING_ENS_NAME, repeats: false) { _ in |
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//Retain self because it's useful to cache the results even if we don't immediately need it now |
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self.getENSOwner(for: input) { result in |
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self.getENSAddressFromResolver(for: input) { result in |
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completion(result) |
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} |
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} |
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} |
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private func cachedResult(forNode node: String) -> EthereumAddress? { |
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return GetENSOwnerCoordinator.resultsCache[ENSLookupKey(name: node, server: server)] |
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return GetENSAddressCoordinator.resultsCache[ENSLookupKey(name: node, server: server)] |
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} |
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private func cache(forNode node: String, result: EthereumAddress) { |
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GetENSOwnerCoordinator.resultsCache[ENSLookupKey(name: node, server: server)] = result |
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GetENSAddressCoordinator.resultsCache[ENSLookupKey(name: node, server: server)] = result |
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} |
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} |
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James Sangalli
6 years ago