WIP firo exchange addresses

lib/models/coinlib/exp2pkh_address.dart

@@ -0,0 +1,87 @@
+import 'dart:typed_data';
+
+import 'package:coinlib_flutter/coinlib_flutter.dart' as coinlib;
+
+const OP_EXCHANGEADDR = 0xe0;
+
+class EXP2PKHAddress implements coinlib.Address {
+  /// The 160bit public key or redeemScript hash for the base58 address
+  final Uint8List _hash;
+
+  /// The network and address type version of the address
+  final Uint8List version;
+
+  String? _encodedCache;
+
+  EXP2PKHAddress._(Uint8List hash, this.version) : _hash = hash {
+    if (version.length != 3) {
+      throw ArgumentError(
+        "version bytes length must be 3",
+      );
+    }
+  }
+
+  factory EXP2PKHAddress.fromString(String encoded, Uint8List versionBytes) {
+    if (versionBytes.length != 3) {
+      throw ArgumentError(
+        "version bytes length must be 3",
+      );
+    }
+
+    final data = coinlib.base58Decode(encoded);
+    if (data.length != 23) throw coinlib.InvalidAddress();
+
+    final version = data.sublist(0, 3);
+
+    for (int i = 0; i < 3; i++) {
+      if (version[i] != versionBytes[i]) {
+        throw Exception("EX address version bytes do not match");
+      }
+    }
+
+    final payload = data.sublist(3);
+
+    final addr = EXP2PKHAddress._(payload, version);
+
+    addr._encodedCache = encoded;
+    return addr;
+  }
+
+  @override
+  String toString() => _encodedCache.toString();
+
+  @override
+  coinlib.Program get program => EXP2PKH.fromHash(_hash);
+}
+
+class EXP2PKH implements coinlib.Program {
+  static const template =
+      "OP_EXCHANGEADDR OP_DUP OP_HASH160 <20-bytes> OP_EQUALVERIFY OP_CHECKSIG";
+
+  @override
+  final coinlib.Script script;
+
+  EXP2PKH.fromScript(this.script);
+
+  factory EXP2PKH.fromHash(Uint8List pkHash) {
+    final List<coinlib.ScriptOp> ops = [
+      coinlib.ScriptOpCode(OP_EXCHANGEADDR),
+    ];
+    final parts = template.split(" ").sublist(1);
+    for (final name in parts) {
+      if (name.startsWith("OP_")) {
+        ops.add(
+          coinlib.ScriptOpCode(
+            coinlib.scriptOpNameToCode[name.substring(3)]!,
+          ),
+        );
+      } else if (name == "<20-bytes>") {
+        ops.add(coinlib.ScriptPushData(pkHash));
+      } else {
+        throw Exception("Something went wrong in this hacked code");
+      }
+    }
+
+    return EXP2PKH.fromScript(coinlib.Script(ops));
+  }
+}

lib/pages/send_view/send_view.dart

@@ -56,6 +56,7 @@ import '../../widgets/animated_text.dart';
 import '../../widgets/background.dart';
 import '../../widgets/custom_buttons/app_bar_icon_button.dart';
 import '../../widgets/custom_buttons/blue_text_button.dart';
+import '../../widgets/dialogs/firo_exchange_address_dialog.dart';
 import '../../widgets/fee_slider.dart';
 import '../../widgets/icon_widgets/addressbook_icon.dart';
 import '../../widgets/icon_widgets/clipboard_icon.dart';
@@ -394,6 +395,14 @@ class _SendViewState extends ConsumerState<SendView> {
           address: address ?? "",
           isTestNet: wallet.cryptoCurrency.network.isTestNet,
         );
+
+        ref.read(pIsExchangeAddress.state).state =
+            (coin as Firo).isExchangeAddress(_address ?? "");
+
+        if (ref.read(publicPrivateBalanceStateProvider) == FiroType.spark &&
+            ref.read(pIsExchangeAddress)) {
+          showFiroExchangeAddressWarning(context);
+        }
       }
 
       ref.read(pValidSendToAddress.notifier).state =
@@ -875,7 +884,10 @@ class _SendViewState extends ConsumerState<SendView> {
   @override
   void initState() {
     coin = widget.coin;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
       ref.refresh(feeSheetSessionCacheProvider);
+      ref.refresh(pIsExchangeAddress);
+    });
     _currentFee = 0.toAmountAsRaw(fractionDigits: coin.fractionDigits);
 
     _calculateFeesFuture =
@@ -1003,6 +1015,8 @@ class _SendViewState extends ConsumerState<SendView> {
             : true);
 
     if (isFiro) {
+      final isExchangeAddress = ref.watch(pIsExchangeAddress);
+
       ref.listen(publicPrivateBalanceStateProvider, (previous, next) {
         selectedUTXOs = {};
 
@@ -1019,6 +1033,12 @@ class _SendViewState extends ConsumerState<SendView> {
             );
           });
         }
+
+        if (previous != next && next == FiroType.spark && isExchangeAddress) {
+          WidgetsBinding.instance.addPostFrameCallback(
+            (_) => showFiroExchangeAddressWarning(context),
+          );
+        }
       });
     }
 

lib/pages_desktop_specific/my_stack_view/wallet_view/sub_widgets/desktop_send.dart

@@ -60,6 +60,7 @@ import '../../../../widgets/desktop/desktop_dialog_close_button.dart';
 import '../../../../widgets/desktop/desktop_fee_dialog.dart';
 import '../../../../widgets/desktop/primary_button.dart';
 import '../../../../widgets/desktop/secondary_button.dart';
+import '../../../../widgets/dialogs/firo_exchange_address_dialog.dart';
 import '../../../../widgets/fee_slider.dart';
 import '../../../../widgets/icon_widgets/addressbook_icon.dart';
 import '../../../../widgets/icon_widgets/clipboard_icon.dart';
@@ -706,6 +707,9 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
           address: address ?? "",
           isTestNet: wallet.cryptoCurrency.network.isTestNet,
         );
+
+        ref.read(pIsExchangeAddress.state).state =
+            (coin as Firo).isExchangeAddress(_address ?? "");
       }
 
       ref.read(pValidSendToAddress.notifier).state =
@@ -842,6 +846,7 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
   void initState() {
     WidgetsBinding.instance.addPostFrameCallback((_) {
       ref.refresh(feeSheetSessionCacheProvider);
+      ref.refresh(pIsExchangeAddress);
       ref.read(pValidSendToAddress.state).state = false;
       ref.read(pValidSparkSendToAddress.state).state = false;
     });
@@ -944,15 +949,22 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
       });
     }
 
+    final firoType = ref.watch(publicPrivateBalanceStateProvider);
+    if (coin is Firo && firoType == FiroType.spark) {
+      if (ref.watch(pIsExchangeAddress)) {
+        WidgetsBinding.instance.addPostFrameCallback(
+          (_) => showFiroExchangeAddressWarning(context),
+        );
+      }
+    }
+
     final showCoinControl = ref.watch(
           prefsChangeNotifierProvider.select(
             (value) => value.enableCoinControl,
           ),
         ) &&
         ref.watch(pWallets).getWallet(walletId) is CoinControlInterface &&
-        (coin is Firo
-            ? ref.watch(publicPrivateBalanceStateProvider) == FiroType.public
-            : true);
+        (coin is Firo ? firoType == FiroType.public : true);
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
@@ -978,7 +990,7 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
           DropdownButtonHideUnderline(
             child: DropdownButton2(
               isExpanded: true,
-              value: ref.watch(publicPrivateBalanceStateProvider.state).state,
+              value: firoType,
               items: [
                 DropdownMenuItem(
                   value: FiroType.spark,
@@ -1464,8 +1476,7 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
               if (_address == null || _address!.isEmpty) {
                 error = null;
               } else if (coin is Firo) {
-                if (ref.watch(publicPrivateBalanceStateProvider) ==
-                    FiroType.lelantus) {
+                if (firoType == FiroType.lelantus) {
                   if (_data != null && _data!.contactLabel == _address) {
                     error = SparkInterface.validateSparkAddress(
                       address: _data!.address,
@@ -1526,15 +1537,13 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
           ),
         if (isStellar ||
             (ref.watch(pValidSparkSendToAddress) &&
-                ref.watch(publicPrivateBalanceStateProvider) !=
-                    FiroType.lelantus))
+                firoType != FiroType.lelantus))
           const SizedBox(
             height: 10,
           ),
         if (isStellar ||
             (ref.watch(pValidSparkSendToAddress) &&
-                ref.watch(publicPrivateBalanceStateProvider) !=
-                    FiroType.lelantus))
+                firoType != FiroType.lelantus))
           ClipRRect(
             borderRadius: BorderRadius.circular(
               Constants.size.circularBorderRadius,

lib/providers/ui/preview_tx_button_state_provider.dart

@@ -9,27 +9,37 @@
  */
 
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import '../wallet/public_private_balance_state_provider.dart';
+
 import '../../utilities/amount/amount.dart';
 import '../../wallets/crypto_currency/crypto_currency.dart';
+import '../wallet/public_private_balance_state_provider.dart';
 
 final pSendAmount = StateProvider.autoDispose<Amount?>((_) => null);
 final pValidSendToAddress = StateProvider.autoDispose<bool>((_) => false);
 final pValidSparkSendToAddress = StateProvider.autoDispose<bool>((_) => false);
 
+final pIsExchangeAddress = StateProvider<bool>((_) => false);
+
 final pPreviewTxButtonEnabled =
     Provider.autoDispose.family<bool, CryptoCurrency>((ref, coin) {
   final amount = ref.watch(pSendAmount) ?? Amount.zero;
 
   if (coin is Firo) {
-    if (ref.watch(publicPrivateBalanceStateProvider) == FiroType.lelantus) {
+    final firoType = ref.watch(publicPrivateBalanceStateProvider);
+    switch (firoType) {
+      case FiroType.lelantus:
         return ref.watch(pValidSendToAddress) &&
             !ref.watch(pValidSparkSendToAddress) &&
             amount > Amount.zero;
-    } else {
+
+      case FiroType.spark:
         return (ref.watch(pValidSendToAddress) ||
                 ref.watch(pValidSparkSendToAddress)) &&
+            !ref.watch(pIsExchangeAddress) &&
             amount > Amount.zero;
+
+      case FiroType.public:
+        return ref.watch(pValidSendToAddress) && amount > Amount.zero;
     }
   } else {
     return ref.watch(pValidSendToAddress) && amount > Amount.zero;

lib/wallets/crypto_currency/coins/firo.dart

@@ -1,5 +1,8 @@
+import 'dart:typed_data';
+
 import 'package:coinlib_flutter/coinlib_flutter.dart' as coinlib;
 
+import '../../../models/coinlib/exp2pkh_address.dart';
 import '../../../models/isar/models/blockchain_data/address.dart';
 import '../../../models/node_model.dart';
 import '../../../utilities/amount/amount.dart';
@@ -77,6 +80,21 @@ class Firo extends Bip39HDCurrency with ElectrumXCurrencyInterface {
         fractionDigits: fractionDigits,
       );
 
+  Uint8List get exAddressVersion {
+    switch (network) {
+      case CryptoCurrencyNetwork.main:
+        // https://github.com/firoorg/firo/blob/master/src/chainparams.cpp#L357
+        return Uint8List.fromList([0x01, 0xb9, 0xbb]);
+
+      case CryptoCurrencyNetwork.test:
+        // https://github.com/firoorg/firo/blob/master/src/chainparams.cpp#L669
+        return Uint8List.fromList([0x01, 0xb9, 0xb1]);
+
+      default:
+        throw Exception("Unsupported network: $network");
+    }
+  }
+
   @override
   coinlib.Network get networkParams {
     switch (network) {
@@ -169,7 +187,11 @@ class Firo extends Bip39HDCurrency with ElectrumXCurrencyInterface {
       coinlib.Address.fromString(address, networkParams);
       return true;
     } catch (_) {
-      return validateSparkAddress(address);
+      if (validateSparkAddress(address)) {
+        return true;
+      } else {
+        return isExchangeAddress(address);
+      }
     }
   }
 
@@ -180,6 +202,18 @@ class Firo extends Bip39HDCurrency with ElectrumXCurrencyInterface {
     );
   }
 
+  bool isExchangeAddress(String address) {
+    try {
+      EXP2PKHAddress.fromString(
+        address,
+        exAddressVersion,
+      );
+      return true;
+    } catch (_) {
+      return false;
+    }
+  }
+
   @override
   NodeModel get defaultNode {
     switch (network) {

lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart

@@ -8,6 +8,7 @@ import 'package:isar/isar.dart';
 import '../../../electrumx_rpc/cached_electrumx_client.dart';
 import '../../../electrumx_rpc/client_manager.dart';
 import '../../../electrumx_rpc/electrumx_client.dart';
+import '../../../models/coinlib/exp2pkh_address.dart';
 import '../../../models/isar/models/blockchain_data/v2/input_v2.dart';
 import '../../../models/isar/models/blockchain_data/v2/output_v2.dart';
 import '../../../models/isar/models/blockchain_data/v2/transaction_v2.dart';
@@ -24,6 +25,7 @@ import '../../crypto_currency/coins/firo.dart';
 import '../../crypto_currency/interfaces/electrumx_currency_interface.dart';
 import '../../models/tx_data.dart';
 import '../impl/bitcoin_wallet.dart';
+import '../impl/firo_wallet.dart';
 import '../impl/peercoin_wallet.dart';
 import '../intermediate/bip39_hd_wallet.dart';
 import 'cpfp_interface.dart';
@@ -725,11 +727,23 @@ mixin ElectrumXInterface<T extends ElectrumXCurrencyInterface>
 
     // Add transaction output
     for (var i = 0; i < txData.recipients!.length; i++) {
-      final address = coinlib.Address.fromString(
+      late final coinlib.Address address;
+
+      try {
+        address = coinlib.Address.fromString(
           normalizeAddress(txData.recipients![i].address),
           cryptoCurrency.networkParams,
         );
-
+      } catch (_) {
+        if (this is FiroWallet) {
+          address = EXP2PKHAddress.fromString(
+            normalizeAddress(txData.recipients![i].address),
+            (cryptoCurrency as Firo).exAddressVersion,
+          );
+        } else {
+          rethrow;
+        }
+      }
       final output = coinlib.Output.fromAddress(
         txData.recipients![i].amount.raw,
         address,

lib/wallets/wallet/wallet_mixin_interfaces/spark_interface.dart

@@ -716,13 +716,13 @@ mixin SparkInterface<T extends ElectrumXCurrencyInterface>
       return result;
     } catch (e) {
       Logging.instance.log(
-        "refreshSparkMempoolData() failed: $e",
+        "_refreshSparkCoinsMempoolCheck() failed: $e",
         level: LogLevel.Error,
       );
       return [];
     } finally {
       Logging.instance.log(
-        "$walletId ${info.name} refreshSparkCoinsMempoolCheck() run "
+        "$walletId ${info.name} _refreshSparkCoinsMempoolCheck() run "
         "duration: ${DateTime.now().difference(start)}",
         level: LogLevel.Debug,
       );

lib/widgets/dialogs/firo_exchange_address_dialog.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+
+import '../../utilities/util.dart';
+import '../stack_dialog.dart';
+
+class FiroExchangeAddressDialog extends StatelessWidget {
+  const FiroExchangeAddressDialog({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return StackOkDialog(
+      title: "Firo exchange address detected",
+      message: "Sending to an exchange address from a Spark balance is not"
+          " allowed. Please send from your transparent balance.",
+      desktopPopRootNavigator: Util.isDesktop,
+      maxWidth: Util.isDesktop ? 500 : null,
+    );
+  }
+}
+
+Future<void> showFiroExchangeAddressWarning(BuildContext context) async {
+  return await showDialog<void>(
+    context: context,
+    builder: (_) => const FiroExchangeAddressDialog(),
+  );
+}

pubspec.lock

@@ -1807,8 +1807,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: f1d02f7ad489df3119a540a7f31485db6d837843
-      resolved-ref: f1d02f7ad489df3119a540a7f31485db6d837843
+      ref: "647cadc3c82c276dc07915b02d24538fd610f220"
+      resolved-ref: "647cadc3c82c276dc07915b02d24538fd610f220"
       url: "https://github.com/cypherstack/tor.git"
     source: git
     version: "0.0.1"