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[#174576563] Add ZNS support to swift resolution library
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Sergey Merenkov
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Sep 10, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // | ||
| // Contract.swift | ||
| // resolution | ||
| // | ||
| // Created by Johnny Good on 8/12/20. | ||
| // Copyright © 2020 Johnny Good. All rights reserved. | ||
| // | ||
|
|
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| import Foundation | ||
|
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| internal class ContractZNS { | ||
| let address: String | ||
| let providerUrl: String | ||
|
|
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| init(providerUrl: String, address: String) { | ||
| self.address = address | ||
| self.providerUrl = providerUrl | ||
| } | ||
|
|
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| func fetchSubState(field: String, keys: [String]) throws -> Any { | ||
|
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| let body: JSON_RPC_REQUEST = JSON_RPC_REQUEST( | ||
| jsonrpc: "2.0", | ||
| id: "1", | ||
| method: "GetSmartContractSubState", | ||
| params: [ | ||
| ParamElement.string(self.address), | ||
| ParamElement.string(field), | ||
| ParamElement.array(keys.map { ParamElement.string($0) }) | ||
| ] | ||
| ) | ||
| let response = try postRequest(body)! | ||
|
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| guard case let ParamElement.dictionary(dict) = response, | ||
| let results = self.reduce(dict: dict)[field] as? [String: Any] else { | ||
| print("Invalid response, can't process") | ||
| return response | ||
| } | ||
|
|
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| return results | ||
| } | ||
|
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| private func postRequest(_ body: JSON_RPC_REQUEST) throws -> Any? { | ||
| let postRequest = APIRequest(providerUrl) | ||
| var resp: JSON_RPC_RESPONSE? | ||
| var err: Error? | ||
| let semaphore = DispatchSemaphore(value: 0) | ||
| postRequest.post(body, completion: {result in | ||
| switch result { | ||
| case .success(let response): | ||
| resp = response | ||
| case .failure(let error): | ||
| err = error | ||
| } | ||
| semaphore.signal() | ||
| }) | ||
| semaphore.wait() | ||
| guard err == nil else { | ||
| throw err! | ||
| } | ||
| return resp?.result | ||
| } | ||
|
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| // MARK: - PRIVATE Helper functions | ||
|
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| private func reduce(dict: [String: ParamElement]) -> [String: Any] { | ||
| return dict.reduce(into: [String: Any]()) { dict, pair in | ||
| let (key, value) = pair | ||
|
|
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| switch value { | ||
| case .paramClass(let elem): | ||
| dict[key] = elem | ||
| case .string(let elem): | ||
| dict[key] = elem | ||
| case .array(let array): | ||
| dict[key] = self.map(array: array) | ||
| case .dictionary(let dictionary): | ||
| dict[key] = self.reduce(dict: dictionary) | ||
| } | ||
| } | ||
| } | ||
|
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| private func map(array: [ParamElement]) -> [Any] { | ||
| return array.map { (value) -> Any in | ||
| switch value { | ||
| case .paramClass(let elem): | ||
| return elem | ||
| case .string(let elem): | ||
| return elem | ||
| case .array(let array): | ||
| return self.map(array: array) | ||
| case .dictionary(let dictionary): | ||
| return self.reduce(dict: dictionary) | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| // | ||
| // Types.swift | ||
| // Resolution | ||
| // | ||
| // Created by Admin on 08.09.20. | ||
| // Copyright © 2020 Johnny Good. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
|
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| public typealias StringResult = (Result<String, ResolutionError>) -> Void | ||
| public typealias DictionaryResult = (Result<[String: String], ResolutionError>) -> Void |
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