[Auth] #378 auth client

Sources/Auth/AuthClient.swift

@@ -1,31 +1,121 @@
 import Foundation
+import Combine
+import JSONRPC
+import WalletConnectUtils
+import WalletConnectPairing
 
 class AuthClient {
     enum Errors: Error {
         case malformedPairingURI
+        case unknownWalletAddress
+        case noPairingMatchingTopic
     }
+    private var authRequestPublisherSubject = PassthroughSubject<(id: RPCID, message: String), Never>()
+    public var authRequestPublisher: AnyPublisher<(id: RPCID, message: String), Never> {
+        authRequestPublisherSubject.eraseToAnyPublisher()
+    }
+
+    private var authResponsePublisherSubject = PassthroughSubject<(id: RPCID, cacao: Cacao), Never>()
+    public var authResponsePublisher: AnyPublisher<(id: RPCID, cacao: Cacao), Never> {
+        authResponsePublisherSubject.eraseToAnyPublisher()
+    }
+    private let rpcHistory: RPCHistory
 
     private let appPairService: AppPairService
-    private let appRequestService: AuthRequestService
+    private let appRequestService: AppRequestService
+    private let appRespondSubscriber: AppRespondSubscriber
 
     private let walletPairService: WalletPairService
+    private let walletRequestSubscriber: WalletRequestSubscriber
+    private let walletRespondService: WalletRespondService
+    private let cleanupService: CleanupService
+    private let pairingStorage: WCPairingStorage
+    public let logger: ConsoleLogging
 
-    init(appPairService: AppPairService, appRequestService: AuthRequestService, walletPairService: WalletPairService) {
+    private var account: Account?
+
+    init(appPairService: AppPairService,
+         appRequestService: AppRequestService,
+         appRespondSubscriber: AppRespondSubscriber,
+         walletPairService: WalletPairService,
+         walletRequestSubscriber: WalletRequestSubscriber,
+         walletRespondService: WalletRespondService,
+         account: Account?,
+         rpcHistory: RPCHistory,
+         cleanupService: CleanupService,
+         logger: ConsoleLogging,
+         pairingStorage: WCPairingStorage) {
         self.appPairService = appPairService
         self.appRequestService = appRequestService
         self.walletPairService = walletPairService
-    }
+        self.walletRequestSubscriber = walletRequestSubscriber
+        self.walletRespondService = walletRespondService
+        self.appRespondSubscriber = appRespondSubscriber
+        self.account = account
+        self.rpcHistory = rpcHistory
+        self.cleanupService = cleanupService
+        self.logger = logger
+        self.pairingStorage = pairingStorage
 
-    func request(params: RequestParams) async throws -> String {
-        let uri = try await appPairService.create()
-        try await appRequestService.request(params: params, topic: uri.topic)
-        return uri.absoluteString
+        setUpPublishers()
     }
 
-    func pair(uri: String) async throws {
+    public func pair(uri: String) async throws {
         guard let pairingURI = WalletConnectURI(string: uri) else {
             throw Errors.malformedPairingURI
         }
         try await walletPairService.pair(pairingURI)
     }
+
+    public func request(_ params: RequestParams, topic: String?) async throws -> String? {
+        logger.debug("Requesting Authentication")
+        if let topic = topic {
+            guard pairingStorage.hasPairing(forTopic: topic) else {
+                throw Errors.noPairingMatchingTopic
+            }
+            logger.debug("Requesting on existing pairing")
+            try await appRequestService.request(params: params, topic: topic)
+            return nil
+        } else {
+            let uri = try await appPairService.create()
+            try await appRequestService.request(params: params, topic: uri.topic)
+            return uri.absoluteString
+        }
+    }
+
+    public func respond(_ params: RespondParams) async throws {
+        guard let account = account else { throw Errors.unknownWalletAddress }
+        try await walletRespondService.respond(respondParams: params, account: account)
+    }
+
+    public func getPendingRequests() throws -> [AuthRequest] {
+        guard let account = account else { throw Errors.unknownWalletAddress }
+        let pendingRequests: [AuthRequest] = rpcHistory.getPending()
+            .filter {$0.request.method == "wc_authRequest"}
+            .compactMap {
+                guard let params = try? $0.request.params?.get(AuthRequestParams.self) else {return nil}
+                let message = SIWEMessageFormatter().formatMessage(from: params.payloadParams, address: account.address)
+                return AuthRequest(id: $0.request.id!, message: message)
+            }
+        return pendingRequests
+    }
+
+#if DEBUG
+    /// Delete all stored data sach as: pairings, sessions, keys
+    ///
+    /// - Note: Doesn't unsubscribe from topics
+    public func cleanup() throws {
+        try cleanupService.cleanup()
+    }
+#endif
+
+    private func setUpPublishers() {
+        appRespondSubscriber.onResponse = { [unowned self] (id, cacao) in
+            authResponsePublisherSubject.send((id, cacao))
+        }
+
+        walletRequestSubscriber.onRequest = { [unowned self] (id, message) in
+            authRequestPublisherSubject.send((id, message))
+        }
+    }
 }

Sources/Auth/Services/App/AuthRequestService.swift → Sources/Auth/Services/App/AppRequestService.swift

@@ -3,7 +3,7 @@ import WalletConnectUtils
 import WalletConnectKMS
 import JSONRPC
 
-actor AuthRequestService {
+actor AppRequestService {
     private let networkingInteractor: NetworkInteracting
     private let appMetadata: AppMetadata
     private let kms: KeyManagementService

Sources/Auth/Services/App/AuthRespondSubscriber.swift → Sources/Auth/Services/App/AppRespondSubscriber.swift

@@ -3,7 +3,7 @@ import Foundation
 import WalletConnectUtils
 import JSONRPC
 
-class AuthRespondSubscriber {
+class AppRespondSubscriber {
     private let networkingInteractor: NetworkInteracting
     private let logger: ConsoleLogging
     private let rpcHistory: RPCHistory

Sources/Auth/Services/Common/CacaoFormatter.swift

@@ -2,11 +2,11 @@ import Foundation
 import WalletConnectUtils
 
 protocol CacaoFormatting {
-    func format(_ request: AuthRequestParams, _ signature: CacaoSignature, _ issuer: Account) -> Cacao
+    func format(_ request: AuthRequestParams, _ signature: CacaoSignature, _ account: Account) -> Cacao
 }
 
 class CacaoFormatter: CacaoFormatting {
-    func format(_ request: AuthRequestParams, _ signature: CacaoSignature, _ issuer: Account) -> Cacao {
+    func format(_ request: AuthRequestParams, _ signature: CacaoSignature, _ account: Account) -> Cacao {
         fatalError("not implemented")
     }
 }

Sources/Auth/Services/Common/CleanupService.swift

@@ -0,0 +1,20 @@
+import Foundation
+import WalletConnectKMS
+import WalletConnectUtils
+import WalletConnectPairing
+
+final class CleanupService {
+
+    private let pairingStore: WCPairingStorage
+    private let kms: KeyManagementServiceProtocol
+
+    init(pairingStore: WCPairingStorage, kms: KeyManagementServiceProtocol, sessionToPairingTopic: CodableStore<String>) {
+        self.pairingStore = pairingStore
+        self.kms = kms
+    }
+
+    func cleanup() throws {
+        pairingStore.deleteAll()
+        try kms.deleteAll()
+    }
+}

Sources/Auth/Services/Wallet/AuthRequestSubscriber.swift → Sources/Auth/Services/Wallet/WalletRequestSubscriber.swift

@@ -3,7 +3,7 @@ import Foundation
 import WalletConnectUtils
 import JSONRPC
 
-class AuthRequestSubscriber {
+class WalletRequestSubscriber {
     private let networkingInteractor: NetworkInteracting
     private let logger: ConsoleLogging
     private let address: String

Sources/Auth/Services/Wallet/AuthRespondService.swift → Sources/Auth/Services/Wallet/WalletRespondService.swift

@@ -3,7 +3,7 @@ import WalletConnectKMS
 import JSONRPC
 import WalletConnectUtils
 
-actor AuthRespondService {
+actor WalletRespondService {
     enum Errors: Error {
         case recordForIdNotFound
         case malformedAuthRequestParams
@@ -23,7 +23,7 @@ actor AuthRespondService {
         self.rpcHistory = rpcHistory
     }
 
-    func respond(respondParams: RespondParams, issuer: Account) async throws {
+    func respond(respondParams: RespondParams, account: Account) async throws {
         guard let request = rpcHistory.get(recordId: RPCID(respondParams.id))?.request else { throw Errors.recordForIdNotFound }
         guard let authRequestParams = try? request.params?.get(AuthRequestParams.self) else { throw Errors.malformedAuthRequestParams }
 
@@ -33,7 +33,7 @@ actor AuthRespondService {
         let agreementKeys = try kms.performKeyAgreement(selfPublicKey: selfPubKey, peerPublicKey: peerPubKey)
         try kms.setAgreementSecret(agreementKeys, topic: responseTopic)
 
-        let cacao = CacaoFormatter().format(authRequestParams, respondParams.signature, issuer)
+        let cacao = CacaoFormatter().format(authRequestParams, respondParams.signature, account)
         let response = RPCResponse(id: request.id!, result: cacao)
 
         try await networkingInteractor.respond(topic: respondParams.topic, response: response, tag: AuthResponseParams.tag, envelopeType: .type1(pubKey: selfPubKey.rawRepresentation))

Sources/Auth/Types/Aliases/Account.swift

@@ -0,0 +1,4 @@
+import WalletConnectUtils
+import Foundation
+
+typealias Account = WalletConnectUtils.Account

Sources/Auth/Types/Aliases/RPCID.swift

@@ -0,0 +1,4 @@
+import Foundation
+import JSONRPC
+
+public typealias RPCID = JSONRPC.RPCID

Sources/Auth/Types/Public/AuthRequest.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+public struct AuthRequest: Equatable, Codable {
+    public let id: RPCID
+    /// EIP-4361: Sign-In with Ethereum message
+    public let message: String
+}

Sources/WalletConnectSign/Sign/SignClient.swift

@@ -3,9 +3,6 @@ import WalletConnectRelay
 import WalletConnectUtils
 import WalletConnectKMS
 import Combine
-#if os(iOS)
-import UIKit
-#endif
 
 /// An Object that expose public API to provide interactions with WalletConnect SDK
 ///

Sources/WalletConnectUtils/RPCHistory.swift

@@ -64,4 +64,8 @@ public final class RPCHistory {
             }
         }
     }
+
+    public func getPending() -> [Record] {
+        storage.getAll().filter {$0.response == nil}
+    }
 }

Tests/AuthTests/AuthRequstSubscriberTests.swift

@@ -8,14 +8,14 @@ import JSONRPC
 
 class AuthRequstSubscriberTests: XCTestCase {
     var networkingInteractor: NetworkingInteractorMock!
-    var sut: AuthRequestSubscriber!
+    var sut: WalletRequestSubscriber!
     var messageFormatter: SIWEMessageFormatterMock!
     let defaultTimeout: TimeInterval = 0.01
 
     override func setUp() {
         networkingInteractor = NetworkingInteractorMock()
         messageFormatter = SIWEMessageFormatterMock()
-        sut = AuthRequestSubscriber(networkingInteractor: networkingInteractor,
+        sut = WalletRequestSubscriber(networkingInteractor: networkingInteractor,
                                    logger: ConsoleLoggerMock(),
                                     messageFormatter: messageFormatter, address: "")
     }