diff --git a/cw_bitcoin/pubspec.lock b/cw_bitcoin/pubspec.lock
index 12274c1e6..cdb88946e 100644
--- a/cw_bitcoin/pubspec.lock
+++ b/cw_bitcoin/pubspec.lock
@@ -67,11 +67,11 @@ packages:
     source: git
     version: "1.0.1"
   bitcoin_base:
-    dependency: "direct main"
+    dependency: "direct overridden"
     description:
       path: "."
-      ref: cake-update-v4
-      resolved-ref: "574486bfcdbbaf978dcd006b46fc8716f880da29"
+      ref: cake-update-v5
+      resolved-ref: ff2b10eb27b0254ce4518d054332d97d77d9b380
       url: "https://github.com/cake-tech/bitcoin_base"
     source: git
     version: "4.7.0"
diff --git a/cw_haven/lib/haven_wallet.dart b/cw_haven/lib/haven_wallet.dart
index c0ecbca68..317d9dc65 100644
--- a/cw_haven/lib/haven_wallet.dart
+++ b/cw_haven/lib/haven_wallet.dart
@@ -10,10 +10,8 @@ import 'package:cw_haven/haven_transaction_info.dart';
 import 'package:cw_haven/haven_wallet_addresses.dart';
 import 'package:cw_core/monero_wallet_utils.dart';
 import 'package:cw_haven/api/structs/pending_transaction.dart';
-import 'package:flutter/foundation.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cw_haven/api/transaction_history.dart' as haven_transaction_history;
-//import 'package:cw_haven/wallet.dart';
 import 'package:cw_haven/api/wallet.dart' as haven_wallet;
 import 'package:cw_haven/api/transaction_history.dart' as transaction_history;
 import 'package:cw_haven/api/monero_output.dart';
@@ -123,7 +121,8 @@ abstract class HavenWalletBase
           login: node.login,
           password: node.password,
           useSSL: node.useSSL ?? false,
-          isLightWallet: false, // FIXME: hardcoded value
+          isLightWallet: false,
+          // FIXME: hardcoded value
           socksProxyAddress: node.socksProxyAddress);
 
       haven_wallet.setTrustedDaemon(node.trusted);
@@ -419,4 +418,12 @@ abstract class HavenWalletBase
 
   @override
   String get password => _password;
+
+  @override
+  Future<String> signMessage(String message, {String? address = null}) =>
+      throw UnimplementedError();
+
+  @override
+  Future<bool> verifyMessage(String message, String signature, {String? address = null}) =>
+      throw UnimplementedError();
 }