Improve error handling when flow execution encounters an error

src/flows/FlowBridge.swift

@@ -95,7 +95,11 @@ extension FlowBridge: WKScriptMessageHandler {
             delegate?.bridgeDidReceiveRequest(self, request: request)
         case .failure:
             logger(.error, "Bridge received failure event", message.body)
-            delegate?.bridgeDidFailAuthentication(self, error: DescopeError.flowFailed.with(message: "Unexpected authentication failure [\(message.body)]"))
+            if let dict = message.body as? [String: Any], let error = DescopeError(errorResponse: dict) {
+                delegate?.bridgeDidFailAuthentication(self, error: error)
+            } else {
+                delegate?.bridgeDidFailAuthentication(self, error: DescopeError.flowFailed.with(message: "Unexpected authentication failure"))
+            }
         case .success:
             logger(.info, "Bridge received success event")
             guard let json = message.body as? String, case let data = Data(json.utf8) else {
@@ -148,7 +152,7 @@ extension FlowBridge: WKNavigationDelegate {
         // Don't print an error log if this was triggered by a non-2xx status code that was caught
         // above and causing the delegate function to return `.cancel`. We rely on the coordinator
         // to not notify about errors multiple times.
-        if case let error = error as NSError, error.domain == "WebKitErrorDomain", error.code == 102 { // https://developer.apple.com/documentation/webkit/1569748-webkit_loading_fail_enumeration_/webkiterrorframeloadinterruptedbypolicychange
+        if case let error = error as NSError, error.domain == "WebKitErrorDomain", error.code == 102 { // https://chromium.googlesource.com/chromium/src/+/2233628f5f5b32c7b458428f8d5cfbd0a18be82e/ios/web/public/web_kit_constants.h#25
             logger(.info, "Webview loading was cancelled")
         } else {
             logger(.error, "Webview failed loading url", error)

src/internal/http/ClientErrors.swift

@@ -6,6 +6,10 @@ import Foundation
 extension DescopeError {
     init?(errorResponse data: Data) {
         guard let dict = try? JSONSerialization.jsonObject(with: data) as? [String: Any] else { return nil }
+        self.init(errorResponse: dict)
+    }
+
+    init?(errorResponse dict: [String: Any]) {
         guard let code = dict["errorCode"] as? String else { return nil }
         var desc = "Descope server error" // is always supposed to be overwritten below
         if let value = dict["errorDescription"] as? String, !value.isEmpty {

src/internal/others/Internal.swift

@@ -27,9 +27,7 @@ extension DescopeLogger? {
 
 extension Data {
     init?(base64URLEncoded base64URLString: String, options: Base64DecodingOptions = []) {
-        var str = base64URLString
-            .replacingOccurrences(of: "-", with: "+")
-            .replacingOccurrences(of: "_", with: "/")
+        var str = base64URLString.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
         if str.count % 4 > 0 {
             str.append(String(repeating: "=", count: 4 - str.count % 4))
         }

src/types/Error.swift

@@ -148,7 +148,7 @@ extension DescopeError: LocalizedError {
     public var errorDescription: String? {
         var str = "\(desc)"
         if let cause = cause as? NSError {
-            str += ": \(cause.localizedDescription) [\(code): \(cause.code)]"
+            str += ": \(cause.localizedDescription) [\(cause.code)]"
         } else if let message {
             str += ": \(message) [\(code)]"
         } else {

src/types/Others.swift

@@ -1,8 +1,5 @@
 
 import Foundation
-#if os(iOS)
-import UIKit
-#endif
 
 /// The delivery method for an OTP or Magic Link message.
 public enum DeliveryMethod: String, Sendable {