[W3M] Custom User-Agent for metrics

Sources/WalletConnectRelay/EnvironmentInfo.swift

@@ -3,28 +3,28 @@ import UIKit
 #endif
 import Foundation
 
-enum EnvironmentInfo {
+public enum EnvironmentInfo {
 
-    static var userAgent: String {
+    public static var userAgent: String {
         "\(protocolName)/\(sdkName)/\(operatingSystem)"
     }
 
-    static var protocolName: String {
+    public static var protocolName: String {
         "wc-2"
     }
 
-    static var sdkName: String {
+    public static var sdkName: String {
         "swift-v\(packageVersion)"
     }
 
-    static var packageVersion: String {
+    public static var packageVersion: String {
         let configURL = Bundle.resourceBundle.url(forResource: "PackageConfig", withExtension: "json")!
         let jsonData = try! Data(contentsOf: configURL)
         let config = try! JSONDecoder().decode(PackageConfig.self, from: jsonData)
         return config.version
     }
 
-    static var operatingSystem: String {
+    public static var operatingSystem: String {
 #if os(iOS)
         return "\(UIDevice.current.systemName)-\(UIDevice.current.systemVersion)"
 #elseif os(macOS)

Sources/Web3Modal/Modal/ModalInteractor.swift

@@ -20,7 +20,10 @@ final class DefaultModalSheetInteractor: ModalSheetInteractor {
         let httpClient = HTTPNetworkClient(host: "explorer-api.walletconnect.com")
         let response = try await httpClient.request(
             ListingsResponse.self,
-            at: ExplorerAPI.getListings(projectId: Web3Modal.config.projectId)
+            at: ExplorerAPI.getListings(
+                projectId: Web3Modal.config.projectId,
+                metadata: Web3Modal.config.metadata
+            )
         )
 
         return response.listings.values.compactMap { $0 }

Sources/Web3Modal/Networking/Explorer/ExplorerAPI.swift

@@ -2,7 +2,7 @@ import Foundation
 import HTTPClient
 
 enum ExplorerAPI: HTTPService {
-    case getListings(projectId: String)
+    case getListings(projectId: String, metadata: AppMetadata)
 
     var path: String {
         switch self {
@@ -22,7 +22,7 @@ enum ExplorerAPI: HTTPService {
 
     var queryParameters: [String: String]? {
         switch self {
-        case let .getListings(projectId):
+        case let .getListings(projectId, _):
             return [
                 "projectId": projectId,
                 "page": "1",
@@ -36,6 +36,21 @@ enum ExplorerAPI: HTTPService {
     }
 
     var additionalHeaderFields: [String: String]? {
-        nil
+
+        switch self {
+        case let .getListings(_, metadata):
+            return [
+                "User-Agent": ExplorerAPI.userAgent,
+                "referer": metadata.name
+            ]
+        }
+    }
+
+    private static var protocolName: String {
+        "w3m-ios-1.0.0"
+    }
+
+    static var userAgent: String {
+        "\(protocolName)/\(EnvironmentInfo.sdkName)/\(EnvironmentInfo.operatingSystem)"
     }
 }

Sources/Web3Modal/UI/Common/AsyncImage.swift

@@ -10,7 +10,11 @@ struct AsyncImage<Content>: View where Content: View {
         init(_ url: URL?) {
             guard let url = url else { return }
 
-            URLSession.shared.dataTaskPublisher(for: url)
+            var request = URLRequest(url: url)
+            request.setValue(ExplorerAPI.userAgent, forHTTPHeaderField: "User-Agent")
+            request.setValue(Web3Modal.config.metadata.name, forHTTPHeaderField: "Referer")
+
+            URLSession.shared.dataTaskPublisher(for: request)
                 .map(\.data)
                 .map { $0 as Data? }
                 .replaceError(with: nil)

Sources/Web3Modal/Web3Modal.swift

@@ -32,6 +32,7 @@ public class Web3Modal {
 
     struct Config {
         let projectId: String
+        var metadata: AppMetadata
         var sessionParams: SessionParams
     }
 
@@ -48,7 +49,11 @@ public class Web3Modal {
         sessionParams: SessionParams = .default
     ) {
         Pair.configure(metadata: metadata)
-        Web3Modal.config = Web3Modal.Config(projectId: projectId, sessionParams: sessionParams)
+        Web3Modal.config = Web3Modal.Config(
+            projectId: projectId,
+            metadata: metadata,
+            sessionParams: sessionParams
+        )
     }
 
     public static func set(sessionParams: SessionParams) {

Sources/Web3Modal/Web3ModalImports.swift

@@ -1,4 +1,5 @@
 #if !CocoaPods
 @_exported import WalletConnectSign
 @_exported import WalletConnectPairing
+@_exported import WalletConnectRelay
 #endif

Tests/Web3ModalTests/ExplorerAPITests.swift

@@ -0,0 +1,17 @@
+import TestingUtils
+@testable import Web3Modal
+import XCTest
+
+final class ExplorerAPITests: XCTestCase {
+
+    func testCorrectUserAgent() throws {
+
+        let request = ExplorerAPI
+            .getListings(projectId: "foo", metadata: .stub())
+            .resolve(for: "www.google.com")
+
+        XCTAssertEqual(request?.allHTTPHeaderFields?["Referer"], "Wallet Connect")
+        // Should look something like this: w3m-ios-1.0.0/swift-v1.6.8/iOS-16.1
+        XCTAssertTrue(request?.allHTTPHeaderFields?["User-Agent"]?.starts(with: "w3m-ios-1.0.0/swift-v") ?? false)
+    }
+}