decred: Add send transaction.

cw_decred/lib/api/libdcrwallet.dart

@@ -151,3 +151,54 @@ int calculateEstimatedFeeWithFeeRate(int feeRate, int amount) {
   // the fee we get back. TODO.
   return 123000;
 }
+
+String createSignedTransaction(
+    String walletName, String createSignedTransactionReq) {
+  final cName = walletName.toCString();
+  final cCreateSignedTransactionReq = createSignedTransactionReq.toCString();
+  final res = executePayloadFn(
+    fn: () => dcrwalletApi.createSignedTransaction(
+        cName, cCreateSignedTransactionReq),
+    ptrsToFree: [cName, cCreateSignedTransactionReq],
+  );
+  return res.payload;
+}
+
+String sendRawTransaction(String walletName, String txHex) {
+  final cName = walletName.toCString();
+  final cTxHex = txHex.toCString();
+  final res = executePayloadFn(
+    fn: () => dcrwalletApi.sendRawTransaction(cName, cTxHex),
+    ptrsToFree: [cName, cTxHex],
+  );
+  return res.payload;
+}
+
+String listTransactions(String walletName, String from, String count) {
+  final cName = walletName.toCString();
+  final cFrom = from.toCString();
+  final cCount = count.toCString();
+  final res = executePayloadFn(
+    fn: () => dcrwalletApi.listTransactions(cName, cFrom, cCount),
+    ptrsToFree: [cName, cFrom, cCount],
+  );
+  return res.payload;
+}
+
+String bestBlock(String walletName) {
+  final cName = walletName.toCString();
+  final res = executePayloadFn(
+    fn: () => dcrwalletApi.bestBlock(cName),
+    ptrsToFree: [cName],
+  );
+  return res.payload;
+}
+
+String listUnspents(String walletName) {
+  final cName = walletName.toCString();
+  final res = executePayloadFn(
+    fn: () => dcrwalletApi.listUnspents(cName),
+    ptrsToFree: [cName],
+  );
+  return res.payload;
+}

cw_decred/lib/pending_transaction.dart

@@ -6,12 +6,14 @@ class DecredPendingTransaction with PendingTransaction {
       {required this.txid,
       required this.amount,
       required this.fee,
-      required this.rawHex});
+      required this.rawHex,
+      required this.send});
 
   final int amount;
   final int fee;
   final String txid;
   final String rawHex;
+  final Future<void> Function() send;
 
   @override
   String get id => txid;
@@ -27,6 +29,6 @@ class DecredPendingTransaction with PendingTransaction {
 
   @override
   Future<void> commit() async {
-    // TODO: Submit rawHex using libdcrwallet.
+    return send();
   }
 }

cw_decred/lib/wallet.dart

@@ -1,10 +1,13 @@
+import 'dart:developer';
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:cw_core/transaction_direction.dart';
 import 'package:cw_decred/pending_transaction.dart';
+import 'package:cw_decred/transaction_credentials.dart';
 import 'package:flutter/foundation.dart';
 import 'package:mobx/mobx.dart';
+import 'package:hive/hive.dart';
 
 import 'package:cw_decred/api/libdcrwallet.dart' as libdcrwallet;
 import 'package:cw_decred/transaction_history.dart';
@@ -20,6 +23,7 @@ import 'package:cw_core/pending_transaction.dart';
 import 'package:cw_core/pathForWallet.dart';
 import 'package:cw_core/sync_status.dart';
 import 'package:cw_core/node.dart';
+import 'package:cw_core/unspent_coins_info.dart';
 import 'package:cw_core/unspent_transaction_output.dart';
 
 part 'wallet.g.dart';
@@ -28,21 +32,25 @@ class DecredWallet = DecredWalletBase with _$DecredWallet;
 
 abstract class DecredWalletBase extends WalletBase<DecredBalance,
     DecredTransactionHistory, DecredTransactionInfo> with Store {
-  DecredWalletBase(WalletInfo walletInfo, String password)
+  DecredWalletBase(WalletInfo walletInfo, String password,
+      Box<UnspentCoinsInfo> unspentCoinsInfo)
       : _password = password,
-        syncStatus = NotConnectedSyncStatus(),
-        balance = ObservableMap.of({CryptoCurrency.dcr: DecredBalance.zero()}),
+        this.syncStatus = NotConnectedSyncStatus(),
+        this.unspentCoinsInfo = unspentCoinsInfo,
+        this.balance =
+            ObservableMap.of({CryptoCurrency.dcr: DecredBalance.zero()}),
         super(walletInfo) {
     walletAddresses = DecredWalletAddresses(walletInfo);
     transactionHistory = DecredTransactionHistory();
   }
 
-  // password is currently only used for seed display, but would likely also be
-  // required to sign inputs when creating transactions.
+  final defaultFeeRate = 10000;
   final String _password;
+  final idPrefix = "decred_";
   bool connecting = false;
   String persistantPeer = "";
   Timer? syncTimer;
+  Box<UnspentCoinsInfo> unspentCoinsInfo;
 
   @override
   @observable
@@ -204,12 +212,55 @@ abstract class DecredWalletBase extends WalletBase<DecredBalance,
 
   @override
   Future<PendingTransaction> createTransaction(Object credentials) async {
+    final inputs = [];
+    this.unspentCoinsInfo.values.forEach((unspent) {
+      if (unspent.isSending) {
+        final input = {"txid": unspent.hash, "vout": unspent.vout};
+        inputs.add(input);
+      }
+    });
+    final ignoreInputs = [];
+    this.unspentCoinsInfo.values.forEach((unspent) {
+      if (unspent.isFrozen) {
+        final input = {"txid": unspent.hash, "vout": unspent.vout};
+        ignoreInputs.add(input);
+      }
+    });
+    final creds = credentials as DecredTransactionCredentials;
+    var totalAmt = 0;
+    final outputs = [];
+    for (final out in creds.outputs) {
+      var amt = 0;
+      if (out.cryptoAmount != null) {
+        final coins = double.parse(out.cryptoAmount!);
+        amt = (coins * 1e8).toInt();
+      }
+      totalAmt += amt;
+      final o = {"address": out.address, "amount": amt};
+      outputs.add(o);
+    }
+    ;
+    // TODO: Fix fee rate.
+    final signReq = {
+      "inputs": inputs,
+      "ignoreInputs": ignoreInputs,
+      "outputs": outputs,
+      "feerate": creds.feeRate ?? defaultFeeRate,
+      "password": _password,
+    };
+    final res = libdcrwallet.createSignedTransaction(
+        walletInfo.name, jsonEncode(signReq));
+    final decoded = json.decode(res);
+    final signedHex = decoded["signedhex"];
+    final send = () async {
+      libdcrwallet.sendRawTransaction(walletInfo.name, signedHex);
+    };
     return DecredPendingTransaction(
-        txid:
-            "3cbf3eb9523fd04e96dbaf98cdbd21779222cc8855ece8700494662ae7578e02",
-        amount: 12345678,
-        fee: 1234,
-        rawHex: "baadbeef");
+        txid: decoded["txid"] ?? "",
+        amount: totalAmt,
+        fee: decoded["fee"] ?? 0,
+        rawHex: signedHex,
+        send: send);
   }
 
   int feeRate(TransactionPriority priority) {
@@ -302,14 +353,80 @@ abstract class DecredWalletBase extends WalletBase<DecredBalance,
   }
 
   List<Unspent> unspents() {
-    return [
-      Unspent(
-          "DsT4qJPPaYEuQRimfgvSKxKH3paysn1x3Nt",
-          "3cbf3eb9523fd04e96dbaf98cdbd21779222cc8855ece8700494662ae7578e02",
-          1234567,
-          0,
-          null)
-    ];
+    final res = libdcrwallet.listUnspents(walletInfo.name);
+    final decoded = json.decode(res);
+    var unspents = <Unspent>[];
+    for (final d in decoded) {
+      final spendable = d["spendable"] ?? false;
+      if (!spendable) {
+        continue;
+      }
+      final amountDouble = d["amount"] ?? 0.0;
+      final amount = (amountDouble * 1e8).toInt().abs();
+      final utxo = Unspent(
+          d["address"] ?? "", d["txid"] ?? "", amount, d["vout"] ?? 0, null);
+      utxo.isChange = d["ischange"] ?? false;
+      unspents.add(utxo);
+    }
+    this.updateUnspents(unspents);
+    return unspents;
+  }
+
+  void updateUnspents(List<Unspent> unspentCoins) {
+    if (this.unspentCoinsInfo.isEmpty) {
+      unspentCoins.forEach((coin) => this.addCoinInfo(coin));
+      return;
+    }
+
+    if (unspentCoins.isEmpty) {
+      this.unspentCoinsInfo.clear();
+      return;
+    }
+
+    final walletID = idPrefix + walletInfo.name;
+    if (unspentCoins.isNotEmpty) {
+      unspentCoins.forEach((coin) {
+        final coinInfoList = this.unspentCoinsInfo.values.where((element) =>
+            element.walletId == walletID &&
+            element.hash == coin.hash &&
+            element.vout == coin.vout);
+
+        if (coinInfoList.isEmpty) {
+          this.addCoinInfo(coin);
+        }
+      });
+    }
+
+    final List<dynamic> keys = <dynamic>[];
+    this.unspentCoinsInfo.values.forEach((element) {
+      final existUnspentCoins =
+          unspentCoins.where((coin) => element.hash.contains(coin.hash));
+
+      if (existUnspentCoins.isEmpty) {
+        keys.add(element.key);
+      }
+    });
+
+    if (keys.isNotEmpty) {
+      unspentCoinsInfo.deleteAll(keys);
+    }
+  }
+
+  void addCoinInfo(Unspent coin) {
+    final newInfo = UnspentCoinsInfo(
+      walletId: idPrefix + walletInfo.name,
+      hash: coin.hash,
+      isFrozen: false,
+      isSending: false,
+      noteRaw: "",
+      address: coin.address,
+      value: coin.value,
+      vout: coin.vout,
+      isChange: coin.isChange,
+      keyImage: coin.keyImage,
+    );
+
+    unspentCoinsInfo.add(newInfo);
   }
 
   @override

cw_decred/lib/wallet_service.dart

@@ -9,15 +9,17 @@ import 'package:cw_core/wallet_info.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:hive/hive.dart';
 import 'package:collection/collection.dart';
+import 'package:cw_core/unspent_coins_info.dart';
 
 class DecredWalletService extends WalletService<
     DecredNewWalletCredentials,
     DecredRestoreWalletFromSeedCredentials,
     DecredRestoreWalletFromPubkeyCredentials,
     DecredRestoreWalletFromHardwareCredentials> {
-  DecredWalletService(this.walletInfoSource);
+  DecredWalletService(this.walletInfoSource, this.unspentCoinsInfoSource);
 
   final Box<WalletInfo> walletInfoSource;
+  final Box<UnspentCoinsInfo> unspentCoinsInfoSource;
 
   static void init() async {
     // Use the general path for all dcr wallets as the general log directory.
@@ -41,7 +43,8 @@ class DecredWalletService extends WalletService<
       dataDir: credentials.walletInfo!.dirPath,
       password: credentials.password!,
     );
-    final wallet = DecredWallet(credentials.walletInfo!, credentials.password!);
+    final wallet = DecredWallet(credentials.walletInfo!, credentials.password!,
+        this.unspentCoinsInfoSource);
     await wallet.init();
     return wallet;
   }
@@ -54,7 +57,8 @@ class DecredWalletService extends WalletService<
       name: walletInfo.name,
       dataDir: walletInfo.dirPath,
     );
-    final wallet = DecredWallet(walletInfo, password);
+    final wallet =
+        DecredWallet(walletInfo, password, this.unspentCoinsInfoSource);
     await wallet.init();
     return wallet;
   }
@@ -73,7 +77,8 @@ class DecredWalletService extends WalletService<
       String currentName, String password, String newName) async {
     final currentWalletInfo = walletInfoSource.values.firstWhereOrNull(
         (info) => info.id == WalletBase.idFor(currentName, getType()))!;
-    final currentWallet = DecredWallet(currentWalletInfo, password);
+    final currentWallet =
+        DecredWallet(currentWalletInfo, password, this.unspentCoinsInfoSource);
 
     await currentWallet.renameWalletFiles(newName);
 
@@ -95,9 +100,21 @@ class DecredWalletService extends WalletService<
 
   @override
   Future<DecredWallet> restoreFromKeys(
-          DecredRestoreWalletFromWIFCredentials credentials,
-          {bool? isTestnet}) async =>
-      throw UnimplementedError();
+      DecredRestoreWalletFromPubkeyCredentials credentials,
+      {bool? isTestnet}) async {
+    createWatchOnlyWallet(
+      credentials.walletInfo!.name,
+      credentials.walletInfo!.dirPath,
+      credentials.pubkey,
+      isTestnet == true ? testnet : mainnet,
+    );
+    credentials.walletInfo!.derivationPath =
+        isTestnet == true ? pubkeyRestorePathTestnet : pubkeyRestorePath;
+    final wallet = DecredWallet(credentials.walletInfo!, credentials.password!,
+        this.unspentCoinsInfoSource);
+    await wallet.init();
+    return wallet;
+  }
 
   @override
   Future<DecredWallet> restoreFromHardwareWallet(

lib/core/address_validator.dart

@@ -115,7 +115,7 @@ class AddressValidator extends TextValidator {
       case CryptoCurrency.zec:
         pattern = 't1[0-9a-zA-Z]{33}|t3[0-9a-zA-Z]{33}';
       case CryptoCurrency.dcr:
-        pattern = 'D[ksecS]([0-9a-zA-Z])+';
+        pattern = '(D|T|S)[ksecS]([0-9a-zA-Z])+';
       case CryptoCurrency.rvn:
         pattern = '[Rr]([1-9a-km-zA-HJ-NP-Z]){33}';
       case CryptoCurrency.near:

lib/decred/cw_decred.dart

@@ -19,8 +19,9 @@ class CWDecred extends Decred {
       DecredRestoreWalletFromSeedCredentials(
           name: name, mnemonic: mnemonic, password: password);
 
-  WalletService createDecredWalletService(Box<WalletInfo> walletInfoSource) {
-    return DecredWalletService(walletInfoSource);
+  WalletService createDecredWalletService(Box<WalletInfo> walletInfoSource,
+      Box<UnspentCoinsInfo> unspentCoinSource) {
+    return DecredWalletService(walletInfoSource, unspentCoinSource);
   }
 
   @override

lib/di.dart

@@ -1095,7 +1095,7 @@ Future<void> setup({
       case WalletType.wownero:
         return wownero!.createWowneroWalletService(_walletInfoSource, _unspentCoinsInfoSource);
       case WalletType.decred:
-        return decred!.createDecredWalletService(_walletInfoSource);
+        return decred!.createDecredWalletService(_walletInfoSource, _unspentCoinsInfoSource);
       case WalletType.none:
         throw Exception('Unexpected token: ${param1.toString()} for generating of WalletService');
     }

lib/entities/preferences_key.dart

@@ -47,6 +47,7 @@ class PreferencesKey {
   static const polygonTransactionPriority = 'current_fee_priority_polygon';
   static const bitcoinCashTransactionPriority = 'current_fee_priority_bitcoin_cash';
   static const wowneroTransactionPriority = 'current_fee_priority_wownero';
+  static const decredTransactionPriority = 'current_fee_priority_decred';
   static const customBitcoinFeeRate = 'custom_electrum_fee_rate';
   static const silentPaymentsCardDisplay = 'silentPaymentsCardDisplay';
   static const silentPaymentsAlwaysScan = 'silentPaymentsAlwaysScan';

lib/store/settings_store.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
+import 'package:cake_wallet/decred/decred.dart';
 import 'package:cake_wallet/bitcoin_cash/bitcoin_cash.dart';
 import 'package:cake_wallet/core/secure_storage.dart';
 import 'package:cake_wallet/di.dart';
@@ -131,6 +132,7 @@ abstract class SettingsStoreBase with Store {
       TransactionPriority? initialEthereumTransactionPriority,
       TransactionPriority? initialPolygonTransactionPriority,
       TransactionPriority? initialBitcoinCashTransactionPriority,
+      TransactionPriority? initialDecredTransactionPriority,
       Country? initialCakePayCountry})
       : nodes = ObservableMap<WalletType, Node>.of(nodes),
         powNodes = ObservableMap<WalletType, Node>.of(powNodes),
@@ -214,6 +216,10 @@ abstract class SettingsStoreBase with Store {
       priority[WalletType.bitcoinCash] = initialBitcoinCashTransactionPriority;
     }
 
+    if (initialDecredTransactionPriority != null) {
+      priority[WalletType.decred] = initialDecredTransactionPriority;
+    }
+
     if (initialCakePayCountry != null) {
       selectedCakePayCountry = initialCakePayCountry;
     }
@@ -267,6 +273,9 @@ abstract class SettingsStoreBase with Store {
         case WalletType.polygon:
           key = PreferencesKey.polygonTransactionPriority;
           break;
+        case WalletType.decred:
+          key = PreferencesKey.decredTransactionPriority;
+          break;
         default:
           key = null;
       }
@@ -870,6 +879,7 @@ abstract class SettingsStoreBase with Store {
     TransactionPriority? polygonTransactionPriority;
     TransactionPriority? bitcoinCashTransactionPriority;
     TransactionPriority? wowneroTransactionPriority;
+    TransactionPriority? decredTransactionPriority;
 
     if (sharedPreferences.getInt(PreferencesKey.havenTransactionPriority) != null) {
       havenTransactionPriority = monero?.deserializeMoneroTransactionPriority(
@@ -895,6 +905,10 @@ abstract class SettingsStoreBase with Store {
       wowneroTransactionPriority = wownero?.deserializeWowneroTransactionPriority(
           raw: sharedPreferences.getInt(PreferencesKey.wowneroTransactionPriority)!);
     }
+    if (sharedPreferences.getInt(PreferencesKey.decredTransactionPriority) != null) {
+      decredTransactionPriority = decred?.deserializeDecredTransactionPriority(
+          sharedPreferences.getInt(PreferencesKey.decredTransactionPriority)!);
+    }
 
     moneroTransactionPriority ??= monero?.getDefaultTransactionPriority();
     bitcoinTransactionPriority ??= bitcoin?.getMediumTransactionPriority();
@@ -903,6 +917,7 @@ abstract class SettingsStoreBase with Store {
     ethereumTransactionPriority ??= ethereum?.getDefaultTransactionPriority();
     bitcoinCashTransactionPriority ??= bitcoinCash?.getDefaultTransactionPriority();
     wowneroTransactionPriority ??= wownero?.getDefaultTransactionPriority();
+    decredTransactionPriority ??= decred?.getDecredTransactionPriorityMedium();
     polygonTransactionPriority ??= polygon?.getDefaultTransactionPriority();
 
     final currentBalanceDisplayMode = BalanceDisplayMode.deserialize(
@@ -1265,6 +1280,7 @@ abstract class SettingsStoreBase with Store {
       initialHavenTransactionPriority: havenTransactionPriority,
       initialLitecoinTransactionPriority: litecoinTransactionPriority,
       initialBitcoinCashTransactionPriority: bitcoinCashTransactionPriority,
+      initialDecredTransactionPriority: decredTransactionPriority,
       initialShouldRequireTOTP2FAForAccessingWallet: shouldRequireTOTP2FAForAccessingWallet,
       initialShouldRequireTOTP2FAForSendsToContact: shouldRequireTOTP2FAForSendsToContact,
       initialShouldRequireTOTP2FAForSendsToNonContact: shouldRequireTOTP2FAForSendsToNonContact,

lib/view_model/send/send_view_model.dart

@@ -279,6 +279,7 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
       wallet.type == WalletType.litecoin ||
       wallet.type == WalletType.monero ||
       wallet.type == WalletType.wownero ||
+      wallet.type == WalletType.decred ||
       wallet.type == WalletType.bitcoinCash;
 
   @computed

lib/view_model/unspent_coins/unspent_coins_list_view_model.dart

@@ -1,6 +1,7 @@
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
 import 'package:cake_wallet/monero/monero.dart';
 import 'package:cake_wallet/utils/exception_handler.dart';
+import 'package:cake_wallet/decred/decred.dart';
 import 'package:cake_wallet/view_model/unspent_coins/unspent_coins_item.dart';
 import 'package:cake_wallet/wownero/wownero.dart';
 import 'package:cw_core/unspent_coin_type.dart';
@@ -94,6 +95,8 @@ abstract class UnspentCoinsListViewModelBase with Store {
       return wownero!.formatterWowneroAmountToString(amount: fullBalance);
     if ([WalletType.bitcoin, WalletType.litecoin, WalletType.bitcoinCash].contains(wallet.type))
       return bitcoin!.formatterBitcoinAmountToString(amount: fullBalance);
+    if (wallet.type == WalletType.decred)
+      return decred!.formatterDecredAmountToString(amount: fullBalance);
     return '';
   }
 
@@ -107,7 +110,9 @@ abstract class UnspentCoinsListViewModelBase with Store {
     if ([WalletType.bitcoin, WalletType.litecoin, WalletType.bitcoinCash].contains(wallet.type)) {
       await bitcoin!.updateUnspents(wallet);
     }
-
+    if (wallet.type == WalletType.decred) {
+      decred!.updateUnspents(wallet);
+    }
     _updateUnspentCoinsInfo();
   }
 
@@ -121,6 +126,8 @@ abstract class UnspentCoinsListViewModelBase with Store {
       case WalletType.litecoin:
       case WalletType.bitcoinCash:
         return bitcoin!.getUnspents(wallet, coinTypeToSpendFrom: coinTypeToSpendFrom);
+      case WalletType.decred:
+        return decred!.getUnspents(wallet);
       default:
         return List.empty();
     }

tool/configure.dart

@@ -1416,6 +1416,7 @@ import 'package:cw_core/transaction_priority.dart';
 import 'package:cw_core/output_info.dart';
 import 'package:cw_core/wallet_service.dart';
 import 'package:cw_core/unspent_transaction_output.dart';
+import 'package:cw_core/unspent_coins_info.dart';
 import 'package:cake_wallet/view_model/send/output.dart';
 import 'package:hive/hive.dart';
 """;
@@ -1431,18 +1432,24 @@ import 'package:cw_decred/transaction_credentials.dart';
   const decredContent = """
 
 abstract class Decred {
-  WalletCredentials createDecredNewWalletCredentials({required String name, WalletInfo? walletInfo});
-  WalletCredentials createDecredRestoreWalletFromSeedCredentials({required String name, required String mnemonic, required String password});
-  WalletService createDecredWalletService(Box<WalletInfo> walletInfoSource);
+  WalletCredentials createDecredNewWalletCredentials(
+      {required String name, WalletInfo? walletInfo});
+  WalletCredentials createDecredRestoreWalletFromSeedCredentials(
+      {required String name,
+      required String mnemonic,
+      required String password});
+  WalletService createDecredWalletService(Box<WalletInfo> walletInfoSource,
+      Box<UnspentCoinsInfo> unspentCoinSource);
 
   List<TransactionPriority> getTransactionPriorities();
   TransactionPriority getMediumTransactionPriority();
   TransactionPriority getDecredTransactionPriorityMedium();
   TransactionPriority getDecredTransactionPrioritySlow();
   TransactionPriority deserializeDecredTransactionPriority(int raw);
-  
+
   int getFeeRate(Object wallet, TransactionPriority priority);
-  Object createDecredTransactionCredentials(List<Output> outputs, TransactionPriority priority);
+  Object createDecredTransactionCredentials(
+      List<Output> outputs, TransactionPriority priority);
 
   List<String> getAddresses(Object wallet);
   String getAddress(Object wallet);