Siwe

Sources/WalletConnectSign/Auth/Types/AuthPayload.swift

@@ -43,7 +43,7 @@ public struct AuthPayload: Codable, Equatable {
     }
 
 
-    init(requestParams: AuthRequestParams, iat: String) {
+    public init(requestParams: AuthRequestParams, iat: String) {
         self.type = "eip4361"
         self.chains = requestParams.chains
         self.domain = requestParams.domain

Sources/WalletConnectSign/Sign/SignClient.swift

@@ -193,6 +193,7 @@ public final class SignClient: SignClientProtocol {
     private let linkSessionRequestSubscriber: LinkSessionRequestSubscriber
     private let sessionResponderDispatcher: SessionResponderDispatcher
     private let linkSessionRequestResponseSubscriber: LinkSessionRequestResponseSubscriber
+    private let messageVerifier: MessageVerifier
 
     private var publishers = Set<AnyCancellable>()
 
@@ -231,7 +232,8 @@ public final class SignClient: SignClientProtocol {
          linkSessionRequestSubscriber: LinkSessionRequestSubscriber,
          sessionResponderDispatcher: SessionResponderDispatcher,
          linkSessionRequestResponseSubscriber: LinkSessionRequestResponseSubscriber,
-         authenticateTransportTypeSwitcher: AuthenticateTransportTypeSwitcher
+         authenticateTransportTypeSwitcher: AuthenticateTransportTypeSwitcher,
+         messageVerifier: MessageVerifier
     ) {
         self.logger = logger
         self.networkingClient = networkingClient
@@ -267,6 +269,7 @@ public final class SignClient: SignClientProtocol {
         self.sessionResponderDispatcher = sessionResponderDispatcher
         self.linkSessionRequestResponseSubscriber = linkSessionRequestResponseSubscriber
         self.authenticateTransportTypeSwitcher = authenticateTransportTypeSwitcher
+        self.messageVerifier = messageVerifier
 
         setUpConnectionObserving()
         setUpEnginesCallbacks()
@@ -374,11 +377,6 @@ public final class SignClient: SignClientProtocol {
         return try pendingRequestsProvider.getPendingRequests()
     }
 
-    public func formatAuthMessage(payload: AuthPayload, account: Account) throws -> String {
-        let cacaoPayload = try CacaoPayloadBuilder.makeCacaoPayload(authPayload: payload, account: account)
-        return try SIWEFromCacaoPayloadFormatter().formatMessage(from: cacaoPayload)
-    }
-
     public func buildSignedAuthObject(authPayload: AuthPayload, signature: CacaoSignature, account: Account) throws -> AuthObject {
         try CacaosBuilder.makeCacao(authPayload: authPayload, signature: signature, account: account)
     }
@@ -387,6 +385,17 @@ public final class SignClient: SignClientProtocol {
         try AuthPayloadBuilder.build(payload: payload, supportedEVMChains: supportedEVMChains, supportedMethods: supportedMethods)
     }
 
+    // MARK: - SIWE
+
+    public func formatAuthMessage(payload: AuthPayload, account: Account) throws -> String {
+        let cacaoPayload = try CacaoPayloadBuilder.makeCacaoPayload(authPayload: payload, account: account)
+        return try SIWEFromCacaoPayloadFormatter().formatMessage(from: cacaoPayload)
+    }
+
+    public func verifySIWE(signature: String, message: String, address: String, chainId: String) async throws {
+        try await messageVerifier.verify(signature: signature, message: message, address: address, chainId: chainId)
+    }
+
     //-----------------------------------------------------------------------------------
 
     /// For a wallet to approve a session proposal.
@@ -590,3 +599,4 @@ public final class SignClient: SignClientProtocol {
         }.store(in: &publishers)
     }
 }
+

Sources/WalletConnectSign/Sign/SignClientFactory.swift

@@ -178,7 +178,8 @@ public struct SignClientFactory {
             linkSessionRequestSubscriber: linkSessionRequestSubscriber,
             sessionResponderDispatcher: sessionResponderDispatcher,
             linkSessionRequestResponseSubscriber: linkSessionRequestResponseSubscriber,
-            authenticateTransportTypeSwitcher: authenticateTransportTypeSwitcher
+            authenticateTransportTypeSwitcher: authenticateTransportTypeSwitcher,
+            messageVerifier: signatureVerifier
         )
         return client
     }

Sources/WalletConnectSigner/Verifier/MessageVerifier.swift

@@ -15,8 +15,8 @@ public struct MessageVerifier {
     }
 
     public func verify(signature: CacaoSignature,
-        message: String,
-        account: Account
+                       message: String,
+                       account: Account
     ) async throws {
         try await self.verify(
             signature: signature,
@@ -27,9 +27,9 @@ public struct MessageVerifier {
     }
 
     public func verify(signature: CacaoSignature,
-        message: String,
-        address: String,
-        chainId: String
+                       message: String,
+                       address: String,
+                       chainId: String
     ) async throws {
 
         guard let messageData = message.data(using: .utf8) else {
@@ -54,4 +54,34 @@ public struct MessageVerifier {
             )
         }
     }
+
+    public func verify(signature: String,
+                       message: String,
+                       address: String,
+                       chainId: String
+    ) async throws {
+
+        guard let messageData = message.data(using: .utf8) else {
+            throw Errors.utf8EncodingFailed
+        }
+        let signatureData = Data(hex: signature)
+
+        let prefixedMessage = messageData.prefixed
+
+        do {
+            try await eip191Verifier.verify(
+                signature: signatureData,
+                message: prefixedMessage,
+                address: address
+            )
+        } catch {
+            // If eip191 verification fails, try eip1271 verification
+            try await eip1271Verifier.verify(
+                signature: signatureData,
+                message: prefixedMessage,
+                address: address,
+                chainId: chainId
+            )
+        }
+    }
 }