simpleswap api call parse fix as well as ui trade exchange name fixes

lib/pages/exchange_view/confirm_change_now_send.dart

@@ -207,7 +207,7 @@ class _ConfirmChangeNowSendViewState
                             crossAxisAlignment: CrossAxisAlignment.stretch,
                             children: [
                               Text(
-                                "ChangeNOW address",
+                                "${trade.exchangeName} address",
                                 style: STextStyles.smallMed12(context),
                               ),
                               const SizedBox(

lib/pages/exchange_view/exchange_loading_overlay.dart

@@ -70,7 +70,7 @@ class _ExchangeLoadingOverlayViewState
                 .overlay
                 .withOpacity(0.7),
             child: const CustomLoadingOverlay(
-                message: "Loading ChangeNOW data", eventBus: null),
+                message: "Loading Exchange data", eventBus: null),
           ),
         if ((_statusEst == ChangeNowLoadStatus.failed ||
                 _statusFixed == ChangeNowLoadStatus.failed) &&
@@ -85,9 +85,9 @@ class _ExchangeLoadingOverlayViewState
               mainAxisAlignment: MainAxisAlignment.end,
               children: [
                 StackDialog(
-                  title: "Failed to fetch ChangeNow data",
+                  title: "Failed to fetch Exchange data",
                   message:
-                      "ChangeNOW requires a working internet connection. Tap OK to try fetching again.",
+                      "Exchange requires a working internet connection. Tap OK to try fetching again.",
                   rightButton: TextButton(
                     style: Theme.of(context)
                         .extension<StackColors>()!

lib/pages/exchange_view/exchange_step_views/step_4_view.dart

@@ -158,7 +158,7 @@ class _Step4ViewState extends ConsumerState<Step4View> {
                           height: 8,
                         ),
                         Text(
-                          "Send ${model.sendTicker.toUpperCase()} to the address below. Once it is received, ChangeNOW will send the ${model.receiveTicker.toUpperCase()} to the recipient address you provided. You can find this trade details and check its status in the list of trades.",
+                          "Send ${model.sendTicker.toUpperCase()} to the address below. Once it is received, ${model.trade!.exchangeName} will send the ${model.receiveTicker.toUpperCase()} to the recipient address you provided. You can find this trade details and check its status in the list of trades.",
                           style: STextStyles.itemSubtitle(context),
                         ),
                         const SizedBox(

lib/pages/exchange_view/exchange_view.dart

@@ -4,7 +4,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:stackwallet/pages/exchange_view/exchange_form.dart';
 import 'package:stackwallet/pages/exchange_view/trade_details_view.dart';
-import 'package:stackwallet/providers/exchange/trade_sent_from_stack_lookup_provider.dart';
 import 'package:stackwallet/providers/global/trades_service_provider.dart';
 import 'package:stackwallet/providers/providers.dart';
 import 'package:stackwallet/utilities/constants.dart';

lib/pages/exchange_view/trade_details_view.dart

@@ -15,7 +15,9 @@ import 'package:stackwallet/pages/wallet_view/transaction_views/edit_note_view.d
 import 'package:stackwallet/pages/wallet_view/transaction_views/transaction_details_view.dart';
 import 'package:stackwallet/providers/global/trades_service_provider.dart';
 import 'package:stackwallet/providers/providers.dart';
+import 'package:stackwallet/services/exchange/change_now/change_now_exchange.dart';
 import 'package:stackwallet/services/exchange/exchange.dart';
+import 'package:stackwallet/services/exchange/simpleswap/simpleswap_exchange.dart';
 import 'package:stackwallet/utilities/assets.dart';
 import 'package:stackwallet/utilities/clipboard_interface.dart';
 import 'package:stackwallet/utilities/enums/coin_enum.dart';
@@ -331,7 +333,7 @@ class _TradeDetailsViewState extends ConsumerState<TradeDetailsView> {
                       crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
                         Text(
-                          "ChangeNOW address",
+                          "${trade.exchangeName} address",
                           style: STextStyles.itemSubtitle(context),
                         ),
                         const SizedBox(
@@ -674,16 +676,10 @@ class _TradeDetailsViewState extends ConsumerState<TradeDetailsView> {
                         "Exchange",
                         style: STextStyles.itemSubtitle(context),
                       ),
-                      // Flexible(
-                      //   child: FittedBox(
-                      //     fit: BoxFit.scaleDown,
-                      //     child:
                       SelectableText(
-                        "ChangeNOW",
+                        trade.exchangeName,
                         style: STextStyles.itemSubtitle12(context),
                       ),
-                      //   ),
-                      // ),
                     ],
                   ),
                 ),
@@ -744,20 +740,31 @@ class _TradeDetailsViewState extends ConsumerState<TradeDetailsView> {
                       const SizedBox(
                         height: 4,
                       ),
-                      GestureDetector(
-                        onTap: () {
-                          final url =
-                              "https://changenow.io/exchange/txs/${trade.tradeId}";
-                          launchUrl(
-                            Uri.parse(url),
-                            mode: LaunchMode.externalApplication,
-                          );
-                        },
-                        child: Text(
-                          "https://changenow.io/exchange/txs/${trade.tradeId}",
-                          style: STextStyles.link2(context),
-                        ),
-                      ),
+                      Builder(builder: (context) {
+                        late final String url;
+                        switch (trade.exchangeName) {
+                          case ChangeNowExchange.exchangeName:
+                            url =
+                                "https://changenow.io/exchange/txs/${trade.tradeId}";
+                            break;
+                          case SimpleSwapExchange.exchangeName:
+                            url =
+                                "https://simpleswap.io/exchange?id=${trade.tradeId}";
+                            break;
+                        }
+                        return GestureDetector(
+                          onTap: () {
+                            launchUrl(
+                              Uri.parse(url),
+                              mode: LaunchMode.externalApplication,
+                            );
+                          },
+                          child: Text(
+                            url,
+                            style: STextStyles.link2(context),
+                          ),
+                        );
+                      }),
                     ],
                   ),
                 ),

lib/pages/home_view/sub_widgets/home_view_button_bar.dart

@@ -24,7 +24,7 @@ class _HomeViewButtonBarState extends ConsumerState<HomeViewButtonBar> {
             context: context,
             barrierDismissible: true,
             builder: (_) => StackDialog(
-              title: "ChangeNOW API Call Failed",
+              title: "Exchange API Call Failed",
               message: message,
             ),
           ),

lib/pages/settings_views/global_settings_view/stack_backup_views/sub_views/stack_restore_progress_view.dart

@@ -389,7 +389,7 @@ class _StackRestoreProgressViewState
                           height: 20,
                           child: _getIconForState(state),
                         ),
-                        title: "ChangeNOW history",
+                        title: "Exchange history",
                         subTitle: state == StackRestoringStatus.failed
                             ? Text(
                                 "Something went wrong",

lib/pages/wallet_view/wallet_view.dart

@@ -235,14 +235,14 @@ class _WalletViewState extends ConsumerState<WalletView> {
       await showDialog<void>(
         context: context,
         builder: (_) => const StackOkDialog(
-          title: "ChangeNOW not available for Epic Cash",
+          title: "Exchange not available for Epic Cash",
         ),
       );
     } else if (coin.name.endsWith("TestNet")) {
       await showDialog<void>(
         context: context,
         builder: (_) => const StackOkDialog(
-          title: "ChangeNOW not available for test net coins",
+          title: "Exchange not available for test net coins",
         ),
       );
     } else {

lib/services/exchange/exchange_data_loading_service.dart

@@ -15,7 +15,7 @@ class ExchangeDataLoadingService {
         loadSimpleswapFloatingRateCurrencies(ref),
       ]);
     } catch (e, s) {
-      Logging.instance.log("ChangeNowLoadingService.loadAll failed: $e\n$s",
+      Logging.instance.log("ExchangeDataLoadingService.loadAll failed: $e\n$s",
           level: LogLevel.Error);
     }
   }

lib/services/exchange/simpleswap/simpleswap_api.dart

@@ -112,14 +112,14 @@ class SimpleSwapAPI {
         payInAmount: json["amount_from"] as String,
         payInAddress: json["address_from"] as String,
         payInNetwork: "",
-        payInExtraId: json["extra_id_payIn"] as String,
-        payInTxid: json["tx_from"] as String,
+        payInExtraId: json["extra_id_from"] as String? ?? "",
+        payInTxid: json["tx_from"] as String? ?? "",
         payOutCurrency: json["currency_to"] as String,
         payOutAmount: json["amount_to"] as String,
         payOutAddress: json["address_to"] as String,
         payOutNetwork: "",
         payOutExtraId: json["extra_id_to"] as String? ?? "",
-        payOutTxid: json["tx_to"] as String,
+        payOutTxid: json["tx_to"] as String? ?? "",
         refundAddress: json["user_refund_address"] as String,
         refundExtraId: json["user_refund_extra_id"] as String,
         status: json["status"] as String,
@@ -360,14 +360,14 @@ class SimpleSwapAPI {
         payInAmount: json["amount_from"] as String,
         payInAddress: json["address_from"] as String,
         payInNetwork: "",
-        payInExtraId: json["extra_id_payIn"] as String,
-        payInTxid: json["tx_from"] as String,
+        payInExtraId: json["extra_id_from"] as String? ?? "",
+        payInTxid: json["tx_from"] as String? ?? "",
         payOutCurrency: json["currency_to"] as String,
         payOutAmount: json["amount_to"] as String,
         payOutAddress: json["address_to"] as String,
         payOutNetwork: "",
         payOutExtraId: json["extra_id_to"] as String? ?? "",
-        payOutTxid: json["tx_to"] as String,
+        payOutTxid: json["tx_to"] as String? ?? "",
         refundAddress: json["user_refund_address"] as String,
         refundExtraId: json["user_refund_extra_id"] as String,
         status: json["status"] as String,