working sign and verify messages for nano

cw_bitcoin/lib/electrum_wallet.dart

@@ -1250,7 +1250,7 @@ abstract class ElectrumWalletBase
 
     if (sigDecodedBytes.length != 64 && sigDecodedBytes.length != 65) {
       throw ArgumentException(
-          "litecoin signature must be 64 bytes without recover-id or 65 bytes with recover-id");
+          "signature must be 64 bytes without recover-id or 65 bytes with recover-id");
     }
 
     String messagePrefix = '\x18Bitcoin Signed Message:\n';

cw_core/lib/nano_block_info_response.dart

@@ -0,0 +1,37 @@
+class BlockContentsResponse {
+  String type;
+  String account;
+  String previous;
+  String representative;
+  String balance;
+  String link;
+  String linkAsAccount;
+  String signature;
+  String work;
+
+  BlockContentsResponse({
+    required this.type,
+    required this.account,
+    required this.previous,
+    required this.representative,
+    required this.balance,
+    required this.link,
+    required this.linkAsAccount,
+    required this.signature,
+    required this.work,
+  });
+
+  factory BlockContentsResponse.fromJson(Map<String, dynamic> json) {
+    return BlockContentsResponse(
+      type: json['type'] as String,
+      account: json['account'] as String,
+      previous: json['previous'] as String,
+      representative: json['representative'] as String,
+      balance: json['balance'] as String,
+      link: json['link'] as String,
+      linkAsAccount: json['link_as_account'] as String,
+      signature: json['signature'] as String,
+      work: json['work'] as String,
+    );
+  }
+}

cw_nano/lib/nano_client.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:cw_core/nano_account_info_response.dart';
+import 'package:cw_core/nano_block_info_response.dart';
 import 'package:cw_core/n2_node.dart';
 import 'package:cw_nano/nano_balance.dart';
 import 'package:cw_nano/nano_transaction_model.dart';
@@ -98,6 +99,27 @@ class NanoClient {
     }
   }
 
+  Future<BlockContentsResponse?> getBlockContents(String block) async {
+    try {
+      final response = await http.post(
+        _node!.uri,
+        headers: CAKE_HEADERS,
+        body: jsonEncode(
+          {
+            "action": "block_info",
+            "json_block": "true",
+            "hash": block,
+          },
+        ),
+      );
+      final data = await jsonDecode(response.body);
+      return BlockContentsResponse.fromJson(data["contents"] as Map<String, dynamic>);
+    } catch (e) {
+      print("error while getting block info $e");
+      return null;
+    }
+  }
+
   Future<String> changeRep({
     required String privateKey,
     required String repAddress,
@@ -297,6 +319,35 @@ class NanoClient {
       representative = infoData.representative;
     }
 
+    if (!openBlock) {
+      // get the block info of the frontier block:
+      BlockContentsResponse? frontierContents = await getBlockContents(frontier);
+
+      if (frontierContents == null) {
+        throw Exception("error while getting frontier block info");
+      }
+
+      final String frontierHash = NanoSignatures.computeStateHash(
+        NanoBasedCurrency.NANO,
+        frontierContents.account,
+        frontierContents.previous,
+        frontierContents.representative,
+        BigInt.parse(frontierContents.balance),
+        frontierContents.link,
+      );
+
+      bool valid = await NanoSignatures.verify(
+        frontierHash,
+        frontierContents.signature,
+        destinationAddress,
+      );
+
+      if (!valid) {
+        throw Exception(
+            "Frontier block signature is invalid! Potentially malicious block detected!");
+      }
+    }
+
     // first get the account balance:
     final BigInt currentBalance = (await getBalance(destinationAddress)).currentBalance;
     final BigInt txAmount = BigInt.parse(amountRaw);
@@ -305,7 +356,8 @@ class NanoClient {
     // link = send block hash:
     final String link = blockHash;
     // this "linkAsAccount" is meaningless:
-    final String linkAsAccount = NanoDerivations.publicKeyToAddress(blockHash, currency: NanoBasedCurrency.NANO);
+    final String linkAsAccount =
+        NanoDerivations.publicKeyToAddress(blockHash, currency: NanoBasedCurrency.NANO);
 
     // construct the receive block:
     Map<String, String> receiveBlock = {

cw_nano/lib/nano_wallet.dart

@@ -500,7 +500,7 @@ abstract class NanoWalletBase
 
   @override
   Future<String> signMessage(String message, {String? address = null}) async {
-    return NanoSignatures.sign(message, privateKey!);
+    return NanoSignatures.signMessage(message, privateKey!);
   }
 
   @override
@@ -508,7 +508,6 @@ abstract class NanoWalletBase
     if (address == null) {
       return false;
     }
-    String publicKey = NanoDerivations.addressToPublicKey(address);
-    return NanoSignatures.verify(message, signature, publicKey);
+    return await NanoSignatures.verifyMessage(message, signature, address);
   }
 }

cw_nano/pubspec.lock

@@ -93,10 +93,10 @@ packages:
     dependency: transitive
     description:
       name: build_daemon
-      sha256: "757153e5d9cd88253cb13f28c2fb55a537dc31fefd98137549895b5beb7c6169"
+      sha256: "0343061a33da9c5810b2d6cee51945127d8f4c060b7fbdd9d54917f0a3feaaa1"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.1"
+    version: "4.0.1"
   build_resolvers:
     dependency: transitive
     description:
@@ -109,10 +109,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: b0a8a7b8a76c493e85f1b84bffa0588859a06197863dba8c9036b15581fd9727
+      sha256: "3ac61a79bfb6f6cc11f693591063a7f19a7af628dc52f141743edac5c16e8c22"
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.3"
+    version: "2.4.9"
   build_runner_core:
     dependency: transitive
     description:
@@ -173,10 +173,10 @@ packages:
     dependency: transitive
     description:
       name: collection
-      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.1"
+    version: "1.18.0"
   convert:
     dependency: transitive
     description:
@@ -193,6 +193,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  cryptography:
+    dependency: transitive
+    description:
+      name: cryptography
+      sha256: d146b76d33d94548cf035233fbc2f4338c1242fa119013bead807d033fc4ae05
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
   cw_core:
     dependency: "direct main"
     description:
@@ -244,10 +252,10 @@ packages:
     dependency: transitive
     description:
       name: ffi
-      sha256: ed5337a5660c506388a9f012be0288fb38b49020ce2b45fe1f8b8323fe429f99
+      sha256: "493f37e7df1804778ff3a53bd691d8692ddf69702cf4c1c1096a2e41b4779e21"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.2"
+    version: "2.1.2"
   file:
     dependency: transitive
     description:
@@ -399,6 +407,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.8.1"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "78eb209deea09858f5269f5a5b02be4049535f568c07b275096836f01ea323fa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.0"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: b46c5e37c19120a8a01918cfaf293547f47269f7cb4b0058f21531c2465d6ef0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: a597f72a664dbd293f3bfc51f9ba69816f84dcd403cdac7066cb3f6003f3ab47
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   libcrypto:
     dependency: "direct main"
     description:
@@ -419,26 +451,26 @@ packages:
     dependency: transitive
     description:
       name: matcher
-      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.15"
+    version: "0.12.16+1"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
       url: "https://pub.dev"
     source: hosted
-    version: "0.2.0"
+    version: "0.8.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      sha256: d584fa6707a52763a52446f02cc621b077888fb63b93bbcb1143a7be5a0c0c04
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.11.0"
   mime:
     dependency: transitive
     description:
@@ -475,11 +507,11 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: dd63c20a3d8956bba26732a36e14fda24ccef284
-      resolved-ref: dd63c20a3d8956bba26732a36e14fda24ccef284
+      ref: c01a9c552917008d8fbc6b540db657031625b04f
+      resolved-ref: c01a9c552917008d8fbc6b540db657031625b04f
       url: "https://github.com/perishllc/nanoutil.git"
     source: git
-    version: "1.0.2"
+    version: "1.0.3"
   package_config:
     dependency: transitive
     description:
@@ -492,10 +524,10 @@ packages:
     dependency: transitive
     description:
       name: path
-      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
       url: "https://pub.dev"
     source: hosted
-    version: "1.8.3"
+    version: "1.9.0"
   path_provider:
     dependency: transitive
     description:
@@ -713,26 +745,26 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
       url: "https://pub.dev"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   stream_transform:
     dependency: transitive
     description:
@@ -761,10 +793,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.1"
+    version: "0.6.1"
   timing:
     dependency: transitive
     description:
@@ -789,14 +821,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
-  watcher:
+  vm_service:
     dependency: transitive
     description:
-      name: watcher
-      sha256: "6a7f46926b01ce81bfc339da6a7f20afbe7733eff9846f6d6a5466aa4c6667c0"
+      name: vm_service
+      sha256: b3d56ff4341b8f182b96aceb2fa20e3dcb336b9f867bc0eafc0de10f1048e957
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.2"
+    version: "13.0.0"
+  watcher:
+    dependency: "direct overridden"
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   web_socket_channel:
     dependency: transitive
     description:
@@ -830,5 +870,5 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.0.0 <4.0.0"
+  dart: ">=3.3.0-279.1.beta <4.0.0"
   flutter: ">=3.7.0"

cw_nano/pubspec.yaml

@@ -24,7 +24,7 @@ dependencies:
   nanoutil:
     git:
       url: https://github.com/perishllc/nanoutil.git
-      ref: dd63c20a3d8956bba26732a36e14fda24ccef284
+      ref: c01a9c552917008d8fbc6b540db657031625b04f
   cw_core:
     path: ../cw_core
 

lib/src/screens/dashboard/sign_page.dart

@@ -37,7 +37,7 @@ class SignPage extends BasePage {
   @override
   Widget middle(BuildContext context) => Observer(
       builder: (_) => Text(
-            "Sign / Verify",
+            "T: Sign / Verify",
             style: TextStyle(
               fontSize: 18.0,
               fontWeight: FontWeight.bold,

lib/view_model/dashboard/dashboard_view_model.dart

@@ -380,6 +380,8 @@ abstract class DashboardViewModelBase with Store {
         WalletType.ethereum,
         WalletType.polygon,
         WalletType.solana,
+        WalletType.nano,
+        WalletType.banano,
       ].contains(wallet.type);
 
   bool get showRepWarning {

lib/view_model/wallet_address_list/wallet_address_list_view_model.dart

@@ -6,6 +6,7 @@ import 'package:cake_wallet/ethereum/ethereum.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/haven/haven.dart';
 import 'package:cake_wallet/monero/monero.dart';
+import 'package:cake_wallet/nano/nano.dart';
 import 'package:cake_wallet/polygon/polygon.dart';
 import 'package:cake_wallet/solana/solana.dart';
 import 'package:cake_wallet/store/app_store.dart';
@@ -348,6 +349,14 @@ abstract class WalletAddressListViewModelBase extends WalletChangeListenerViewMo
       addressList.add(WalletAddressListItem(isPrimary: true, name: null, address: primaryAddress));
     }
 
+    if (wallet.type == WalletType.nano) {
+      addressList.add(WalletAddressListItem(
+        isPrimary: true,
+        name: null,
+        address: wallet.walletAddresses.address,
+      ));
+    }
+
     if (searchText.isNotEmpty) {
       return ObservableList.of(addressList.where((item) {
         if (item is WalletAddressListItem) {

pubspec_base.yaml

@@ -26,7 +26,7 @@ dependencies:
   path_provider: ^2.0.11
   mobx: ^2.1.4
   flutter_mobx: ^2.0.6+5
-  flutter_slidable: ^2.0.0
+  flutter_slidable: ^3.0.1
   share_plus: ^4.0.10
   # date_range_picker: ^1.0.6
   #https://api.flutter.dev/flutter/material/showDateRangePicker.html