Cw 598 fixes for electrum based wallets (#1344)

* fix: address book addresses, bch builder, exchange all fee estimation, bch coin control

* feat: new error framework for Electrum messages

* build: cw_bitcoin.dart

* feat: error improvements, localization, fix exchange amount mismatch

* chore: misc comment & print [skip ci]

* feat: refactor & simplify sendAll vs regular tx estimation and creation

- Since there were so many conditions inside a single function to alter its behavior if sendAll or not, it is easier and more readable to have separate sendAll and estimateTx functions that behave separately

* fix: wrong LTC dust

* feat: fee rate confirmation

* fix: wrong createTrade value when isSendAll is enabled

* fix bitcoin cash address parsing [skip ci]

* fix: form no amount validator, address book with multiple entries, exchange all below min error

* fix: improve string, fix sending with dust inputs at the top

* fix: two change outputs when re-estimating

* fix: sendAll with a little dust adds fees

* chore: sanity check [skip ci]

* fix: if the fee is higher than estimated

* Minor enhancement [skip ci]

---------

Co-authored-by: OmarHatem <omarh.ismail1@gmail.com>

lib/src/screens/exchange/exchange_page.dart

@@ -186,7 +186,13 @@ class ExchangePage extends BasePage {
                               StandardCheckbox(
                                 value: exchangeViewModel.isFixedRateMode,
                                 caption: S.of(context).fixed_rate,
-                                onChanged: (value) => exchangeViewModel.isFixedRateMode = value,
+                                onChanged: (value) {
+                                  if (value) {
+                                    exchangeViewModel.enableFixedRateMode();
+                                  } else {
+                                    exchangeViewModel.isFixedRateMode = false;
+                                  }
+                                },
                               ),
                             ],
                           )),
@@ -528,7 +534,7 @@ class ExchangePage extends BasePage {
 
     _receiveAmountFocus.addListener(() {
       if (_receiveAmountFocus.hasFocus) {
-        exchangeViewModel.isFixedRateMode = true;
+        exchangeViewModel.enableFixedRateMode();
       }
       // exchangeViewModel.changeReceiveAmount(amount: receiveAmountController.text);
     });

lib/src/screens/exchange_trade/exchange_trade_page.dart

@@ -262,6 +262,7 @@ class ExchangeTradeState extends State<ExchangeTradeForm> {
                     fee: S.of(popupContext).send_fee,
                     feeValue: widget.exchangeTradeViewModel.sendViewModel
                         .pendingTransaction!.feeFormatted,
+                    feeRate: widget.exchangeTradeViewModel.sendViewModel.pendingTransaction!.feeRate,
                     rightButtonText: S.of(popupContext).send,
                     leftButtonText: S.of(popupContext).cancel,
                     actionRightButton: () async {

lib/src/screens/send/send_page.dart

@@ -426,6 +426,7 @@ class SendPage extends BasePage {
                       fee: isEVMCompatibleChain(sendViewModel.walletType)
                           ? S.of(_dialogContext).send_estimated_fee
                           : S.of(_dialogContext).send_fee,
+                      feeRate: sendViewModel.pendingTransaction!.feeRate,
                       feeValue: sendViewModel.pendingTransaction!.feeFormatted,
                       feeFiatAmount: sendViewModel.pendingTransactionFeeFiatAmountFormatted,
                       outputs: sendViewModel.outputs,

lib/src/screens/send/widgets/confirm_sending_alert.dart

@@ -16,6 +16,7 @@ class ConfirmSendingAlert extends BaseAlertDialog {
       required this.amountValue,
       required this.fiatAmountValue,
       required this.fee,
+      this.feeRate,
       required this.feeValue,
       required this.feeFiatAmount,
       required this.outputs,
@@ -36,6 +37,7 @@ class ConfirmSendingAlert extends BaseAlertDialog {
   final String amountValue;
   final String fiatAmountValue;
   final String fee;
+  final String? feeRate;
   final String feeValue;
   final String feeFiatAmount;
   final List<Output> outputs;
@@ -90,6 +92,7 @@ class ConfirmSendingAlert extends BaseAlertDialog {
       amountValue: amountValue,
       fiatAmountValue: fiatAmountValue,
       fee: fee,
+      feeRate: feeRate,
       feeValue: feeValue,
       feeFiatAmount: feeFiatAmount,
       outputs: outputs);
@@ -103,6 +106,7 @@ class ConfirmSendingAlertContent extends StatefulWidget {
       required this.amountValue,
       required this.fiatAmountValue,
       required this.fee,
+      this.feeRate,
       required this.feeValue,
       required this.feeFiatAmount,
       required this.outputs});
@@ -113,6 +117,7 @@ class ConfirmSendingAlertContent extends StatefulWidget {
   final String amountValue;
   final String fiatAmountValue;
   final String fee;
+  final String? feeRate;
   final String feeValue;
   final String feeFiatAmount;
   final List<Output> outputs;
@@ -125,6 +130,7 @@ class ConfirmSendingAlertContent extends StatefulWidget {
       amountValue: amountValue,
       fiatAmountValue: fiatAmountValue,
       fee: fee,
+      feeRate: feeRate,
       feeValue: feeValue,
       feeFiatAmount: feeFiatAmount,
       outputs: outputs);
@@ -138,6 +144,7 @@ class ConfirmSendingAlertContentState extends State<ConfirmSendingAlertContent>
       required this.amountValue,
       required this.fiatAmountValue,
       required this.fee,
+      this.feeRate,
       required this.feeValue,
       required this.feeFiatAmount,
       required this.outputs})
@@ -153,6 +160,7 @@ class ConfirmSendingAlertContentState extends State<ConfirmSendingAlertContent>
   final String amountValue;
   final String fiatAmountValue;
   final String fee;
+  final String? feeRate;
   final String feeValue;
   final String feeFiatAmount;
   final List<Output> outputs;
@@ -183,7 +191,7 @@ class ConfirmSendingAlertContentState extends State<ConfirmSendingAlertContent>
 
     return Stack(alignment: Alignment.center, clipBehavior: Clip.none, children: [
       Container(
-          height: 200,
+          height: feeRate != null ? 250 : 200,
           child: SingleChildScrollView(
               controller: controller,
               child: Column(
@@ -311,6 +319,36 @@ class ConfirmSendingAlertContentState extends State<ConfirmSendingAlertContent>
                             )
                           ],
                         )),
+                  if (feeRate != null && feeRate!.isNotEmpty)
+                    Padding(
+                        padding: EdgeInsets.only(top: 16),
+                        child: Row(
+                          mainAxisSize: MainAxisSize.max,
+                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                          crossAxisAlignment: CrossAxisAlignment.start,
+                          children: <Widget>[
+                            Text(
+                              S.current.send_estimated_fee,
+                              style: TextStyle(
+                                fontSize: 16,
+                                fontWeight: FontWeight.normal,
+                                fontFamily: 'Lato',
+                                color: Theme.of(context).extension<CakeTextTheme>()!.titleColor,
+                                decoration: TextDecoration.none,
+                              ),
+                            ),
+                            Text(
+                              "$feeRate sat/byte",
+                              style: TextStyle(
+                                fontSize: 18,
+                                fontWeight: FontWeight.w600,
+                                fontFamily: 'Lato',
+                                color: Theme.of(context).extension<CakeTextTheme>()!.titleColor,
+                                decoration: TextDecoration.none,
+                              ),
+                            )
+                          ],
+                        )),
                   Padding(
                     padding: EdgeInsets.only(top: 16),
                     child: Column(

lib/src/screens/unspent_coins/unspent_coins_list_page.dart

@@ -46,9 +46,6 @@ class UnspentCoinsListFormState extends State<UnspentCoinsListForm> {
                 itemBuilder: (_, int index) {
                   return Observer(builder: (_) {
                     final item = unspentCoinsListViewModel.items[index];
-                    final address = unspentCoinsListViewModel.wallet.type == WalletType.bitcoinCash
-                        ? bitcoinCash!.getCashAddrFormat(item.address)
-                        : item.address;
 
                     return GestureDetector(
                         onTap: () => Navigator.of(context).pushNamed(Routes.unspentCoinsDetails,
@@ -56,7 +53,7 @@ class UnspentCoinsListFormState extends State<UnspentCoinsListForm> {
                         child: UnspentCoinsListItem(
                             note: item.note,
                             amount: item.amount,
-                            address: address,
+                            address: item.address,
                             isSending: item.isSending,
                             isFrozen: item.isFrozen,
                             isChange: item.isChange,