Estimated fee rates.

lib/view_model/send/send_view_model.dart

@@ -97,7 +97,8 @@ abstract class SendViewModelBase with Store {
       }
     }
 
-    final fee = _wallet.calculateEstimatedFee(_settingsStore.priority[_wallet.type], amount);
+    final fee = _wallet.calculateEstimatedFee(
+        _settingsStore.priority[_wallet.type], amount);
 
     if (_wallet is BitcoinWallet) {
       return bitcoinAmountToDouble(amount: fee);
@@ -298,7 +299,8 @@ abstract class SendViewModelBase with Store {
         final amount = !sendAll ? _amount : null;
         final priority = _settingsStore.priority[_wallet.type];
 
-        return BitcoinTransactionCredentials(address, amount, priority as BitcoinTransactionPriority);
+        return BitcoinTransactionCredentials(
+            address, amount, priority as BitcoinTransactionPriority);
       case WalletType.monero:
         final amount = !sendAll ? _amount : null;
         final priority = _settingsStore.priority[_wallet.type];
@@ -345,4 +347,16 @@ abstract class SendViewModelBase with Store {
 
   void removeTemplate({Template template}) =>
       _sendTemplateStore.remove(template: template);
+
+  String displayFeeRate(dynamic priority) {
+    final _priority = priority as TransactionPriority;
+    final wallet = _wallet;
+
+    if (wallet is BitcoinWallet) {
+      final rate = wallet.feeRate(_priority);
+      return '${priority.toString()} ($rate sat/byte)';
+    }
+
+    return priority.toString();
+  }
 }

lib/view_model/settings/picker_list_item.dart

@@ -6,12 +6,14 @@ class PickerListItem<ItemType> extends SettingsListItem {
       {@required String title,
       @required this.selectedItem,
       @required this.items,
+      this.displayItem,
       void Function(ItemType item) onItemSelected})
       : _onItemSelected = onItemSelected,
         super(title);
 
   final ItemType Function() selectedItem;
   final List<ItemType> items;
+  final String Function(ItemType item) displayItem;
   final void Function(ItemType item) _onItemSelected;
 
   void onItemSelected(dynamic item) {

lib/view_model/settings/settings_view_model.dart

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/bitcoin/bitcoin_transaction_priority.dart';
+import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
 import 'package:cake_wallet/entities/balance.dart';
 import 'package:cake_wallet/entities/transaction_priority.dart';
 import 'package:cake_wallet/themes/theme_base.dart';
@@ -74,6 +75,16 @@ abstract class SettingsViewModelBase with Store {
         PickerListItem(
             title: S.current.settings_fee_priority,
             items: priorityForWalletType(wallet.type),
+            displayItem: (dynamic priority) {
+              final _priority = priority as TransactionPriority;
+
+              if (wallet is BitcoinWallet) {
+                final rate = wallet.feeRate(_priority);
+                return '${priority.toString()} ($rate sat/byte)';
+              }
+
+              return priority.toString();
+            },
             selectedItem: () => transactionPriority,
             onItemSelected: (TransactionPriority priority) =>
                 _settingsStore.priority[wallet.type] = priority),