add user agent

Example/IntegrationTests/Relay/RelayClientEndToEndTests.swift

@@ -22,6 +22,7 @@ final class RelayClientEndToEndTests: XCTestCase {
         )
         let urlFactory = RelayUrlFactory(socketAuthenticator: socketAuthenticator)
         let socket = WebSocket(url: urlFactory.create(host: relayHost, projectId: projectId))
+
         let logger = ConsoleLogger()
         let dispatcher = Dispatcher(socket: socket, socketConnectionHandler: ManualSocketConnectionHandler(socket: socket), logger: logger)
         return RelayClient(dispatcher: dispatcher, logger: logger, keyValueStorage: RuntimeKeyValueStorage())

Sources/WalletConnectRelay/EnvironmentInfo.swift

@@ -0,0 +1,24 @@
+import UIKit
+
+enum EnvironmentInfo {
+
+    static var userAgent: String {
+        "\(protocolName)/\(sdkName)/\(operatingSystem)"
+    }
+
+    static var protocolName: String {
+        "wc-2"
+    }
+
+    static var sdkName: String {
+        "swift-\(sdkVersion)"
+    }
+
+    static var sdkVersion: String {
+        "2.0.0-rc.0" // HARDCODED!! Is there a runtime way to get this?
+    }
+
+    static var operatingSystem: String {
+        "\(UIDevice.current.systemName)-\(UIDevice.current.systemVersion)"
+    }
+}

Sources/WalletConnectRelay/RelayClient.swift

@@ -76,6 +76,7 @@ public final class RelayClient {
             host: relayHost,
             projectId: projectId
         ))
+        socket.request.addValue(EnvironmentInfo.userAgent, forHTTPHeaderField: "User-Agent")
         let socketConnectionHandler: SocketConnectionHandler
         switch socketConnectionType {
         case .automatic:

Sources/WalletConnectRelay/SocketConnectionHandler/WebSocket.swift

@@ -5,7 +5,7 @@ public protocol WebSocketConnecting: AnyObject {
     var onConnect: (() -> Void)? { get set }
     var onDisconnect: ((Error?) -> Void)? { get set }
     var onText: ((String) -> Void)? { get set }
-
+    var request: URLRequest { get set }
     func connect()
     func disconnect()
     func write(string: String, completion: (() -> Void)?)

Tests/RelayerTests/DispatcherTests.swift

@@ -5,6 +5,8 @@ import TestingUtils
 import Combine
 
 class WebSocketMock: WebSocketConnecting {
+    var request: URLRequest = URLRequest(url: URL(string: "wss://relay.walletconnect.com")!)
+
 
     var onText: ((String) -> Void)?
     var onConnect: (() -> Void)?