Cw 565 sign messages (#1378)

* version bump to 3.13.9, auth working on mac

* bump flutter version in workflow file

* workflow fix

* test fix

* downgrade flutter version

* test fix

* test fix

* update gradle version

* start working on ui for message signing

* updates

* sign working for a few wallet types

* updates & verification for electrum currencies

* nano support

* sign/verify working on eth, bitcoin broken

* update translations

* Implement Verify Message for Monero

* save [skip ci]

* pub key extraction working

* fixes for electrum signing

* verify working for solana!

* electrum still not working :( [skip ci]

* electrum messages working!

* fixes for updated dart version, localization file updates

* remove accidental inclusion

* missed some unimplemented throws

* Update res/values/strings_de.arb

Co-authored-by: Konstantin Ullrich <konstantinullrich12@gmail.com>

* Apply suggestions from code review

Co-authored-by: Konstantin Ullrich <konstantinullrich12@gmail.com>

* review suggestions and updates [skip ci]

* [skip ci] add polygon

* [skip ci] merge mac-auth/update version

* fix litecoin

* bio auth mac fix

* remove comment and change duration from 2 to 0

* cherry pick previous changes

* litecoin fixes, sign form fixes, use new walletAddressPicker

* support accounts

* verify messages working for monero

* working sign and verify messages for nano

* electrum signing working [skip ci]

* additional nano fixes

* update translations

* attempt to decode signatures with base64

* workaround for secure storage bug on mac

* bump version to 3.19.5 (because breez will need this version anyways)

* some code cleanup

* some changess didn't get saved

* just documenting the issue [skip ci]

* undo accidental removal + minor code cleanup

* merge conflicts

* merge fixes [skip ci]

* add tron support

* [wip] fixing

* remove duplicate references to electrum path for maintainability

* fixes

* minor fix

* fixes

* undo debug comment

* update migration for all electrum based wallets

* hotfixes

* copy over the rest of the fixes

* minor code cleanup [skip ci]

* updates

* electrum signing workinggit statusgit statusgit statusgit status!

* copy same fixes for litecoin

* litecoin fixes

* add v to litecoin signatures

* fix dependencies

* fix bitcoin_base version

* merge fix

* dep override

* fix conflicts with main

* trial fix for android build

* fixes

* fix

* dep fix, should build

* fix signing for bitcoin cash

* [skip ci] minor code cleanup

* [skip ci] minor code cleanup 2

* forgot wonero, various other fixes

* more fixes

* fix solana (untested)

---------

Co-authored-by: Konstantin Ullrich <konstantinullrich12@gmail.com>
Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

cw_evm/lib/evm_chain_wallet.dart

@@ -35,6 +35,7 @@ import 'package:mobx/mobx.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:web3dart/crypto.dart';
 import 'package:web3dart/web3dart.dart';
+import 'package:eth_sig_util/eth_sig_util.dart';
 
 import 'evm_chain_transaction_info.dart';
 import 'evm_erc20_balance.dart';
@@ -500,7 +501,7 @@ abstract class EVMChainWalletBase
     }
 
     final methodSignature =
-    transactionInput.length >= 10 ? transactionInput.substring(0, 10) : null;
+        transactionInput.length >= 10 ? transactionInput.substring(0, 10) : null;
 
     return methodSignatureToType[methodSignature];
   }
@@ -692,8 +693,21 @@ abstract class EVMChainWalletBase
   }
 
   @override
-  Future<String> signMessage(String message, {String? address}) async =>
-      bytesToHex(await _evmChainPrivateKey.signPersonalMessage(ascii.encode(message)));
+  Future<String> signMessage(String message, {String? address}) async {
+    return bytesToHex(await _evmChainPrivateKey.signPersonalMessage(ascii.encode(message)));
+  }
+
+  @override
+  Future<bool> verifyMessage(String message, String signature, {String? address}) async {
+    if (address == null) {
+      return false;
+    }
+    final recoveredAddress = EthSigUtil.recoverPersonalSignature(
+      message: ascii.encode(message),
+      signature: signature,
+    );
+    return recoveredAddress.toUpperCase() == address.toUpperCase();
+  }
 
   Web3Client? getWeb3Client() => _client.getWeb3Client();
 

cw_evm/pubspec.yaml

@@ -13,6 +13,8 @@ dependencies:
   flutter:
     sdk: flutter
   web3dart: ^2.7.1
+  eth_sig_util: ^0.0.9
+  erc20: ^1.0.1
   bip39: ^1.0.6
   bip32: ^2.0.0
   hex: ^0.2.0