Merge pull request #452 from WalletConnect/#415-auth-instance

[Auth] #415 auth instance

Sources/Auth/Auth.swift

@@ -0,0 +1,26 @@
+import Foundation
+import WalletConnectRelay
+import Combine
+
+public class Auth {
+
+    public static var instance: AuthClient = {
+        guard let config = Auth.config else {
+            fatalError("Error - you must call Auth.configure(_:) before accessing the shared instance.")
+        }
+        return AuthClientFactory.create(
+            metadata: config.metadata,
+            account: config.account,
+            relayClient: Relay.instance)
+    }()
+
+    private static var config: Config?
+
+    private init() { }
+
+    static public func configure(metadata: AppMetadata, account: Account?) {
+        Auth.config = Auth.Config(
+            metadata: metadata,
+            account: account)
+    }
+}

Sources/Auth/AuthConfig.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+extension Auth {
+    struct Config {
+        let metadata: AppMetadata
+        let account: Account?
+    }
+}

Sources/Auth/Services/Wallet/WalletRequestSubscriber.swift

@@ -19,9 +19,7 @@ class WalletRequestSubscriber {
         self.logger = logger
         self.address = address
         self.messageFormatter = messageFormatter
-        if address != nil {
-            subscribeForRequest()
-        }
+        subscribeForRequest()
     }
 
     private func subscribeForRequest() {