Fixes node connection, and sp, and electrum (#1577)

* refactor: remove bitcoin_flutter, update deps, electrs node improvements

* feat: connecting/disconnecting improvements, fix rescan by date, scanning message

* chore: print

* Update pubspec.yaml

* Update pubspec.yaml

* handle null sockets, retry connection on connect failure

* fix imports

* fix transaction history

* fix RBF

* minor fixes/readability enhancements [skip ci]

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>
Co-authored-by: Matthew Fosse <matt@fosse.co>

lib/bitcoin/cw_bitcoin.dart

@@ -302,16 +302,13 @@ class CWBitcoin extends Bitcoin {
     await electrumClient.connectToUri(node.uri, useSSL: node.useSSL);
 
     late BasedUtxoNetwork network;
-    btc.NetworkType networkType;
     switch (node.type) {
       case WalletType.litecoin:
         network = LitecoinNetwork.mainnet;
-        networkType = litecoinNetwork;
         break;
       case WalletType.bitcoin:
       default:
         network = BitcoinNetwork.mainnet;
-        networkType = btc.bitcoin;
         break;
     }
 
@@ -341,10 +338,8 @@ class CWBitcoin extends Bitcoin {
             balancePath += "/0";
           }
 
-          final hd = btc.HDWallet.fromSeed(
-            seedBytes,
-            network: networkType,
-          ).derivePath(balancePath);
+          final hd = Bip32Slip10Secp256k1.fromSeed(seedBytes).derivePath(balancePath)
+              as Bip32Slip10Secp256k1;
 
           // derive address at index 0:
           String? address;
@@ -515,10 +510,7 @@ class CWBitcoin extends Bitcoin {
   @override
   Future<void> setScanningActive(Object wallet, bool active) async {
     final bitcoinWallet = wallet as ElectrumWallet;
-    bitcoinWallet.setSilentPaymentsScanning(
-      active,
-      active && (await getNodeIsElectrsSPEnabled(wallet)),
-    );
+    bitcoinWallet.setSilentPaymentsScanning(active);
   }
 
   @override
@@ -536,44 +528,10 @@ class CWBitcoin extends Bitcoin {
     bitcoinWallet.rescan(height: height, doSingleScan: doSingleScan);
   }
 
-  Future<bool> getNodeIsElectrs(Object wallet) async {
-    final bitcoinWallet = wallet as ElectrumWallet;
-
-    final version = await bitcoinWallet.electrumClient.version();
-
-    if (version.isEmpty) {
-      return false;
-    }
-
-    final server = version[0];
-
-    if (server.toLowerCase().contains('electrs')) {
-      return true;
-    }
-
-    return false;
-  }
-
   @override
   Future<bool> getNodeIsElectrsSPEnabled(Object wallet) async {
-    if (!(await getNodeIsElectrs(wallet))) {
-      return false;
-    }
-
     final bitcoinWallet = wallet as ElectrumWallet;
-    try {
-      final tweaksResponse = await bitcoinWallet.electrumClient.getTweaks(height: 0);
-
-      if (tweaksResponse != null) {
-        return true;
-      }
-    } on RequestFailedTimeoutException catch (_) {
-      return false;
-    } catch (_) {
-      rethrow;
-    }
-
-    return false;
+    return bitcoinWallet.getNodeSupportsSilentPayments();
   }
 
   @override

lib/core/sync_status_title.dart

@@ -52,5 +52,9 @@ String syncStatusTitle(SyncStatus syncStatus) {
     return S.current.sync_status_syncronizing;
   }
 
+  if (syncStatus is StartingScanSyncStatus) {
+    return S.current.sync_status_starting_scan;
+  }
+
   return '';
 }

lib/src/screens/cake_pay/cards/cake_pay_confirm_purchase_card_page.dart

@@ -34,7 +34,7 @@ class CakePayBuyCardDetailPage extends BasePage {
 
   @override
   Widget? middle(BuildContext context) {
-    return  Text(
+    return Text(
       title,
       textAlign: TextAlign.center,
       maxLines: 2,
@@ -359,7 +359,7 @@ class CakePayBuyCardDetailPage extends BasePage {
     reaction((_) => cakePayPurchaseViewModel.sendViewModel.state, (ExecutionState state) {
       if (state is FailureState) {
         WidgetsBinding.instance.addPostFrameCallback((_) {
-          showStateAlert(context, S.of(context).error, state.error);
+          if (context.mounted) showStateAlert(context, S.of(context).error, state.error);
         });
       }
 
@@ -381,31 +381,35 @@ class CakePayBuyCardDetailPage extends BasePage {
   }
 
   void showStateAlert(BuildContext context, String title, String content) {
-    showPopUp<void>(
-        context: context,
-        builder: (BuildContext context) {
-          return AlertWithOneAction(
-              alertTitle: title,
-              alertContent: content,
-              buttonText: S.of(context).ok,
-              buttonAction: () => Navigator.of(context).pop());
-        });
+    if (context.mounted) {
+      showPopUp<void>(
+          context: context,
+          builder: (BuildContext context) {
+            return AlertWithOneAction(
+                alertTitle: title,
+                alertContent: content,
+                buttonText: S.of(context).ok,
+                buttonAction: () => Navigator.of(context).pop());
+          });
+    }
   }
 
   Future<void> showSentAlert(BuildContext context) async {
+    if (!context.mounted) {
+      return;
+    }
     final order = cakePayPurchaseViewModel.order!.orderId;
     final isCopy = await showPopUp<bool>(
-        context: context,
-        builder: (BuildContext context) {
-          return AlertWithTwoActions(
-              alertTitle: S.of(context).transaction_sent,
-              alertContent:
-              S.of(context).cake_pay_save_order + '\n${order}',
-              leftButtonText: S.of(context).ignor,
-              rightButtonText: S.of(context).copy,
-              actionLeftButton: () => Navigator.of(context).pop(false),
-              actionRightButton: () => Navigator.of(context).pop(true));
-        }) ??
+            context: context,
+            builder: (BuildContext context) {
+              return AlertWithTwoActions(
+                  alertTitle: S.of(context).transaction_sent,
+                  alertContent: S.of(context).cake_pay_save_order + '\n${order}',
+                  leftButtonText: S.of(context).ignor,
+                  rightButtonText: S.of(context).copy,
+                  actionLeftButton: () => Navigator.of(context).pop(false),
+                  actionRightButton: () => Navigator.of(context).pop(true));
+            }) ??
         false;
 
     if (isCopy) {