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Merge branch 'bitcoin-derivations' of https://github.com/cake-tech/cake_wallet into bip39-less-confusing

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This commit is contained in:
Matthew Fosse 2024-04-29 14:03:55 -07:00
commit 49d6a29065
20 changed files with 154 additions and 77 deletions
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2
cw_bitcoin/lib/bitcoin_transaction_priority.dart
View file

@ -37,7 +37,7 @@ class BitcoinTransactionPriority extends TransactionPriority {
switch (this) {
case BitcoinTransactionPriority.slow:
label = 'Slow ~24hrs'; // '${S.current.transaction_priority_slow} ~24hrs';
label = 'Slow ~24hrs+'; // '${S.current.transaction_priority_slow} ~24hrs';
break;
case BitcoinTransactionPriority.medium:
label = 'Medium'; // S.current.transaction_priority_medium;

5
cw_bitcoin/lib/bitcoin_wallet_service.dart
View file

@ -3,7 +3,6 @@ import 'package:bitcoin_base/bitcoin_base.dart';
import 'package:cw_bitcoin/bitcoin_mnemonic.dart';
import 'package:cw_bitcoin/mnemonic_is_incorrect_exception.dart';
import 'package:cw_bitcoin/bitcoin_wallet_creation_credentials.dart';
import 'package:cw_core/node.dart';
import 'package:cw_core/unspent_coins_info.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:cw_core/wallet_service.dart';
@ -127,8 +126,4 @@ class BitcoinWalletService extends WalletService<BitcoinNewWalletCredentials,
await wallet.init();
return wallet;
}
static Future<dynamic> getInfoFromSeed({required String seed, required Node node}) async {
throw UnimplementedError();
}
}

46
cw_bitcoin/lib/electrum_wallet.dart
View file

@ -206,10 +206,14 @@ abstract class ElectrumWalletBase
List<ECPrivate> privateKeys = [];
int allInputsAmount = 0;
bool spendsUnconfirmedTX = false;
for (int i = 0; i < unspentCoins.length; i++) {
final utx = unspentCoins[i];
if (utx.isSending) {
if (utx.isSending && !utx.isFrozen) {
if (!spendsUnconfirmedTX) spendsUnconfirmedTX = utx.confirmations == 0;
allInputsAmount += utx.value;
final address = addressTypeFromStr(utx.address, network);
@ -267,6 +271,10 @@ abstract class ElectrumWalletBase
// Here, when sending all, the output amount equals to the input value - fee to fully spend every input on the transaction and have no amount left for change
int amount = allInputsAmount - fee;
if (amount <= 0) {
throw BitcoinTransactionWrongBalanceException();
}
// Attempting to send less than the dust limit
if (_isBelowDust(amount)) {
throw BitcoinTransactionNoDustException();
@ -291,6 +299,7 @@ abstract class ElectrumWalletBase
isSendAll: true,
hasChange: false,
memo: memo,
spendsUnconfirmedTX: spendsUnconfirmedTX,
);
}
@ -300,17 +309,25 @@ abstract class ElectrumWalletBase
int feeRate, {
int? inputsCount,
String? memo,
bool? useUnconfirmed,
}) async {
final utxos = <UtxoWithAddress>[];
List<ECPrivate> privateKeys = [];
int allInputsAmount = 0;
bool spendsUnconfirmedTX = false;
int leftAmount = credentialsAmount;
final sendingCoins = unspentCoins.where((utx) => utx.isSending).toList();
final sendingCoins = unspentCoins.where((utx) => utx.isSending && !utx.isFrozen).toList();
final unconfirmedCoins = sendingCoins.where((utx) => utx.confirmations == 0).toList();
for (int i = 0; i < sendingCoins.length; i++) {
final utx = sendingCoins[i];
final isUncormirmed = utx.confirmations == 0;
if (useUnconfirmed != true && isUncormirmed) continue;
if (!spendsUnconfirmedTX) spendsUnconfirmedTX = isUncormirmed;
allInputsAmount += utx.value;
leftAmount = leftAmount - utx.value;
@ -348,11 +365,23 @@ abstract class ElectrumWalletBase
}
final spendingAllCoins = sendingCoins.length == utxos.length;
final spendingAllConfirmedCoins =
!spendsUnconfirmedTX && utxos.length == sendingCoins.length - unconfirmedCoins.length;
// How much is being spent - how much is being sent
int amountLeftForChangeAndFee = allInputsAmount - credentialsAmount;
if (amountLeftForChangeAndFee <= 0) {
if (!spendingAllCoins) {
return estimateTxForAmount(
credentialsAmount,
outputs,
feeRate,
inputsCount: utxos.length + 1,
memo: memo,
useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
);
}
throw BitcoinTransactionWrongBalanceException();
}
@ -406,6 +435,7 @@ abstract class ElectrumWalletBase
feeRate,
inputsCount: utxos.length + 1,
memo: memo,
useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
);
}
@ -452,6 +482,7 @@ abstract class ElectrumWalletBase
feeRate,
inputsCount: utxos.length + 1,
memo: memo,
useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
);
}
}
@ -464,6 +495,7 @@ abstract class ElectrumWalletBase
hasChange: true,
isSendAll: false,
memo: memo,
spendsUnconfirmedTX: spendsUnconfirmedTX,
);
}
@ -534,7 +566,7 @@ abstract class ElectrumWalletBase
network: network,
memo: estimatedTx.memo,
outputOrdering: BitcoinOrdering.none,
enableRBF: true,
enableRBF: !estimatedTx.spendsUnconfirmedTX,
);
} else {
txb = BitcoinTransactionBuilder(
@ -544,7 +576,7 @@ abstract class ElectrumWalletBase
network: network,
memo: estimatedTx.memo,
outputOrdering: BitcoinOrdering.none,
enableRBF: true,
enableRBF: !estimatedTx.spendsUnconfirmedTX,
);
}
@ -727,6 +759,7 @@ abstract class ElectrumWalletBase
final tx = await fetchTransactionInfo(
hash: coin.hash, height: 0, myAddresses: addressesSet);
coin.isChange = tx?.direction == TransactionDirection.outgoing;
coin.confirmations = tx?.confirmations;
updatedUnspentCoins.add(coin);
} catch (_) {}
}))));
@ -751,6 +784,7 @@ abstract class ElectrumWalletBase
coin.isFrozen = coinInfo.isFrozen;
coin.isSending = coinInfo.isSending;
coin.note = coinInfo.note;
coin.bitcoinAddressRecord.balance += coinInfo.value;
} else {
_addCoinInfo(coin);
}
@ -1043,9 +1077,11 @@ abstract class ElectrumWalletBase
return Future.wait(addressesByType.map((addressRecord) async {
final history = await _fetchAddressHistory(addressRecord, addressesSet, currentHeight);
final balance = await electrumClient.getBalance(addressRecord.scriptHash!);
if (history.isNotEmpty) {
addressRecord.txCount = history.length;
addressRecord.balance = balance['confirmed'] as int? ?? 0;
historiesWithDetails.addAll(history);
final matchedAddresses =
@ -1276,6 +1312,7 @@ class EstimatedTxResult {
required this.hasChange,
required this.isSendAll,
this.memo,
required this.spendsUnconfirmedTX,
});
final List<UtxoWithAddress> utxos;
@ -1285,6 +1322,7 @@ class EstimatedTxResult {
final bool hasChange;
final bool isSendAll;
final String? memo;
final bool spendsUnconfirmedTX;
}
BitcoinBaseAddress addressTypeFromStr(String address, BasedUtxoNetwork network) {

4
cw_bitcoin/lib/exceptions.dart
View file

@ -15,7 +15,9 @@ class BitcoinTransactionNoDustOnChangeException extends TransactionNoDustOnChang
BitcoinTransactionNoDustOnChangeException(super.max, super.min);
}
class BitcoinTransactionCommitFailed extends TransactionCommitFailed {}
class BitcoinTransactionCommitFailed extends TransactionCommitFailed {
BitcoinTransactionCommitFailed({super.errorMessage});
}
class BitcoinTransactionCommitFailedDustChange extends TransactionCommitFailedDustChange {}

3
cw_bitcoin/lib/litecoin_wallet_service.dart
View file

@ -11,6 +11,7 @@ import 'package:cw_core/wallet_type.dart';
import 'package:cw_core/wallet_info.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:collection/collection.dart';
import 'package:bip39/bip39.dart' as bip39;
class LitecoinWalletService extends WalletService<
BitcoinNewWalletCredentials,
@ -100,7 +101,7 @@ class LitecoinWalletService extends WalletService<
@override
Future<LitecoinWallet> restoreFromSeed(
BitcoinRestoreWalletFromSeedCredentials credentials, {bool? isTestnet}) async {
if (!validateMnemonic(credentials.mnemonic)) {
if (!validateMnemonic(credentials.mnemonic) && !bip39.validateMnemonic(credentials.mnemonic)) {
throw LitecoinMnemonicIsIncorrectException();
}

2
cw_bitcoin/lib/pending_bitcoin_transaction.dart
View file

@ -73,7 +73,9 @@ class PendingBitcoinTransaction with PendingTransaction {
if (error.contains("bad-txns-vout-negative")) {
throw BitcoinTransactionCommitFailedVoutNegative();
}
throw BitcoinTransactionCommitFailed(errorMessage: error);
}
throw BitcoinTransactionCommitFailed();
}

34
cw_bitcoin/pubspec.lock
View file

@ -21,10 +21,10 @@ packages:
dependency: transitive
description:
name: args
sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
sha256: "7cf60b9f0cc88203c5a190b4cd62a99feea42759a7fa695010eb5de1c0b2252a"
url: "https://pub.dev"
source: hosted
version: "2.4.2"
version: "2.5.0"
asn1lib:
dependency: transitive
description:
@ -80,7 +80,7 @@ packages:
description:
path: "."
ref: cake-update-v2
resolved-ref: "3fd81d238b990bb767fc7a4fdd5053a22a142e2e"
resolved-ref: "01d844a5f5a520a31df5254e34169af4664aa769"
url: "https://github.com/cake-tech/bitcoin_base.git"
source: git
version: "4.2.0"
@ -153,10 +153,10 @@ packages:
dependency: "direct dev"
description:
name: build_runner
sha256: "581bacf68f89ec8792f5e5a0b2c4decd1c948e97ce659dc783688c8a88fbec21"
sha256: "3ac61a79bfb6f6cc11f693591063a7f19a7af628dc52f141743edac5c16e8c22"
url: "https://pub.dev"
source: hosted
version: "2.4.8"
version: "2.4.9"
build_runner_core:
dependency: transitive
description:
@ -177,10 +177,10 @@ packages:
dependency: transitive
description:
name: built_value
sha256: a3ec2e0f967bc47f69f95009bb93db936288d61d5343b9436e378b28a2f830c6
sha256: c7913a9737ee4007efedaffc968c049fd0f3d0e49109e778edc10de9426005cb
url: "https://pub.dev"
source: hosted
version: "8.9.0"
version: "8.9.2"
characters:
dependency: transitive
description:
@ -309,10 +309,10 @@ packages:
dependency: "direct main"
description:
name: flutter_mobx
sha256: "4a5d062ff85ed3759f4aac6410ff0ffae32e324b2e71ca722ae1b37b32e865f4"
sha256: "859fbf452fa9c2519d2700b125dd7fb14c508bbdd7fb65e26ca8ff6c92280e2e"
url: "https://pub.dev"
source: hosted
version: "2.2.0+2"
version: "2.2.1+1"
flutter_test:
dependency: "direct dev"
description: flutter
@ -322,10 +322,10 @@ packages:
dependency: transitive
description:
name: frontend_server_client
sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
url: "https://pub.dev"
source: hosted
version: "3.2.0"
version: "4.0.0"
glob:
dependency: transitive
description:
@ -466,10 +466,10 @@ packages:
dependency: "direct main"
description:
name: mobx
sha256: "74ee54012dc7c1b3276eaa960a600a7418ef5f9997565deb8fca1fd88fb36b78"
sha256: "63920b27b32ad1910adfe767ab1750e4c212e8923232a1f891597b362074ea5e"
url: "https://pub.dev"
source: hosted
version: "2.3.0+1"
version: "2.3.3+2"
mobx_codegen:
dependency: "direct dev"
description:
@ -570,10 +570,10 @@ packages:
dependency: transitive
description:
name: pointycastle
sha256: "43ac87de6e10afabc85c445745a7b799e04de84cebaa4fd7bf55a5e1e9604d29"
sha256: "70fe966348fe08c34bf929582f1d8247d9d9408130723206472b4687227e4333"
url: "https://pub.dev"
source: hosted
version: "3.7.4"
version: "3.8.0"
pool:
dependency: transitive
description:
@ -586,10 +586,10 @@ packages:
dependency: transitive
description:
name: provider
sha256: "9a96a0a19b594dbc5bf0f1f27d2bc67d5f95957359b461cd9feb44ed6ae75096"
sha256: c8a055ee5ce3fd98d6fc872478b03823ffdb448699c6ebdbbc71d59b596fd48c
url: "https://pub.dev"
source: hosted
version: "6.1.1"
version: "6.1.2"
pub_semver:
dependency: transitive
description:

2
cw_bitcoin_cash/lib/src/pending_bitcoin_cash_transaction.dart
View file

@ -62,7 +62,9 @@ class PendingBitcoinCashTransaction with PendingTransaction {
if (error.contains("bad-txns-vout-negative")) {
throw BitcoinTransactionCommitFailedVoutNegative();
}
throw BitcoinTransactionCommitFailed(errorMessage: error);
}
throw BitcoinTransactionCommitFailed();
}

6
cw_core/lib/exceptions.dart
View file

@ -19,7 +19,11 @@ class TransactionNoDustOnChangeException implements Exception {
final String min;
}
class TransactionCommitFailed implements Exception {}
class TransactionCommitFailed implements Exception {
final String? errorMessage;
TransactionCommitFailed({this.errorMessage});
}
class TransactionCommitFailedDustChange implements Exception {}

1
cw_core/lib/unspent_transaction_output.dart
View file

@ -14,6 +14,7 @@ class Unspent {
bool isChange;
bool isSending;
bool isFrozen;
int? confirmations;
String note;
bool get isP2wpkh => address.startsWith('bc') || address.startsWith('ltc');

11
lib/bitcoin/cw_bitcoin.dart
View file

@ -416,13 +416,14 @@ class CWBitcoin extends Bitcoin {
}
@override
int getFeeAmountWithFeeRate(Object wallet, int feeRate, int inputsCount, int outputsCount,
{int? size}) {
int getEstimatedFeeWithFeeRate(Object wallet, int feeRate, int? amount,
{int? outputsCount, int? size}) {
final bitcoinWallet = wallet as ElectrumWallet;
return bitcoinWallet.feeAmountWithFeeRate(
return bitcoinWallet.calculateEstimatedFeeWithFeeRate(
feeRate,
inputsCount,
outputsCount,
amount,
outputsCount: outputsCount,
size: size,
);
}

61
lib/core/wallet_loading_service.dart
View file

@ -1,27 +1,28 @@
import 'package:cake_wallet/core/generate_wallet_password.dart';
import 'package:cake_wallet/core/key_service.dart';
import 'package:cake_wallet/entities/preferences_key.dart';
import 'package:cake_wallet/utils/exception_handler.dart';
import 'package:cw_core/cake_hive.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:cw_core/wallet_info.dart';
import 'package:cw_core/wallet_service.dart';
import 'package:cw_core/wallet_type.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
class WalletLoadingService {
WalletLoadingService(
this.sharedPreferences, this.keyService, this.walletServiceFactory);
WalletLoadingService(this.sharedPreferences, this.keyService, this.walletServiceFactory);
final SharedPreferences sharedPreferences;
final KeyService keyService;
final WalletService Function(WalletType type) walletServiceFactory;
Future<void> renameWallet(
WalletType type, String name, String newName) async {
Future<void> renameWallet(WalletType type, String name, String newName) async {
final walletService = walletServiceFactory.call(type);
final password = await keyService.getWalletPassword(walletName: name);
// Save the current wallet's password to the new wallet name's key
await keyService.saveWalletPassword(
walletName: newName, password: password);
await keyService.saveWalletPassword(walletName: newName, password: password);
// Delete previous wallet name from keyService to keep only new wallet's name
// otherwise keeps duplicate (old and new names)
await keyService.deleteWalletPassword(walletName: name);
@ -38,15 +39,43 @@ class WalletLoadingService {
}
Future<WalletBase> load(WalletType type, String name) async {
final walletService = walletServiceFactory.call(type);
final password = await keyService.getWalletPassword(walletName: name);
final wallet = await walletService.openWallet(name, password);
try {
final walletService = walletServiceFactory.call(type);
final password = await keyService.getWalletPassword(walletName: name);
final wallet = await walletService.openWallet(name, password);
if (type == WalletType.monero) {
await updateMoneroWalletPassword(wallet);
if (type == WalletType.monero) {
await updateMoneroWalletPassword(wallet);
}
return wallet;
} catch (error, stack) {
ExceptionHandler.onError(FlutterErrorDetails(exception: error, stack: stack));
// try opening another wallet that is not corrupted to give user access to the app
final walletInfoSource = await CakeHive.openBox<WalletInfo>(WalletInfo.boxName);
for (var walletInfo in walletInfoSource.values) {
try {
final walletService = walletServiceFactory.call(walletInfo.type);
final password = await keyService.getWalletPassword(walletName: walletInfo.name);
final wallet = await walletService.openWallet(walletInfo.name, password);
if (walletInfo.type == WalletType.monero) {
await updateMoneroWalletPassword(wallet);
}
await sharedPreferences.setString(PreferencesKey.currentWalletName, wallet.name);
await sharedPreferences.setInt(
PreferencesKey.currentWalletType, serializeToInt(wallet.type));
return wallet;
} catch (_) {}
}
// if all user's wallets are corrupted throw exception
throw error;
}
return wallet;
}
Future<void> updateMoneroWalletPassword(WalletBase wallet) async {
@ -61,11 +90,9 @@ class WalletLoadingService {
// Save new generated password with backup key for case where
// wallet will change password, but it will fail to update in secure storage
final bakWalletName = '#__${wallet.name}_bak__#';
await keyService.saveWalletPassword(
walletName: bakWalletName, password: password);
await keyService.saveWalletPassword(walletName: bakWalletName, password: password);
await wallet.changePassword(password);
await keyService.saveWalletPassword(
walletName: wallet.name, password: password);
await keyService.saveWalletPassword(walletName: wallet.name, password: password);
isPasswordUpdated = true;
await sharedPreferences.setBool(key, isPasswordUpdated);
}

18
lib/src/screens/restore/wallet_restore_page.dart
View file

@ -379,20 +379,24 @@ class WalletRestorePage extends BasePage {
dInfo = derivations[derivationWithHistoryIndex];
}
// get the default derivation for this wallet type:
if (dInfo == null) {
walletRestoreViewModel.state = InitialExecutionState();
return;
// we only return 1 derivation if we're pretty sure we know which one to use:
if (derivations.length == 1) {
dInfo = derivations.first;
} else {
// if we have multiple possible derivations, and none have histories
// we just default to the most common one:
dInfo = walletRestoreViewModel.getMostCommonDerivation();
}
}
this.derivationInfo = dInfo;
// get the default derivation for this wallet type:
if (this.derivationInfo == null) {
this.derivationInfo = walletRestoreViewModel.getMostCommonDerivation();
walletRestoreViewModel.state = InitialExecutionState();
return;
}
walletRestoreViewModel.state = InitialExecutionState();
walletRestoreViewModel.create(options: _credentials());
}

2
lib/src/screens/send/send_page.dart
View file

@ -100,7 +100,7 @@ class SendPage extends BasePage {
AppBarStyle get appBarStyle => AppBarStyle.transparent;
double _sendCardHeight(BuildContext context) {
double initialHeight = 450;
double initialHeight = 480;
if (sendViewModel.hasCoinControl) {
initialHeight += 35;
}

4
lib/src/screens/wallet_list/wallet_list_page.dart
View file

@ -343,7 +343,9 @@ class WalletListBodyState extends State<WalletListBody> {
});
}
} catch (e) {
changeProcessText(S.of(context).wallet_list_failed_to_load(wallet.name, e.toString()));
if (this.mounted) {
changeProcessText(S.of(context).wallet_list_failed_to_load(wallet.name, e.toString()));
}
}
},
conditionToDetermineIfToUse2FA:

4
lib/view_model/send/output.dart
View file

@ -126,8 +126,8 @@ abstract class OutputBase with Store {
if (_wallet.type == WalletType.bitcoin) {
if (_settingsStore.priority[_wallet.type] == bitcoin!.getBitcoinTransactionPriorityCustom()) {
fee = bitcoin!.getFeeAmountWithFeeRate(
_settingsStore.customBitcoinFeeRate, formattedCryptoAmount, 1, 1);
fee = bitcoin!.getEstimatedFeeWithFeeRate(_wallet,
_settingsStore.customBitcoinFeeRate,formattedCryptoAmount);
}
return bitcoin!.formatterBitcoinAmountToDouble(amount: fee);

2
lib/view_model/send/send_view_model.dart
View file

@ -562,7 +562,7 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
return S.current.tx_no_dust_exception;
}
if (error is TransactionCommitFailed) {
return S.current.tx_commit_failed;
return "${S.current.tx_commit_failed}${error.errorMessage != null ? "\n\n${error.errorMessage}" : ""}";
}
if (error is TransactionCommitFailedDustChange) {
return S.current.tx_rejected_dust_change;

14
lib/view_model/transaction_details_view_model.dart
View file

@ -390,16 +390,12 @@ abstract class TransactionDetailsViewModelBase with Store {
String setNewFee({double? value, required TransactionPriority priority}) {
newFee = priority == bitcoin!.getBitcoinTransactionPriorityCustom() && value != null
? bitcoin!.getFeeAmountWithFeeRate(
wallet,
value.round(),
transactionInfo.inputAddresses?.length ?? 1,
transactionInfo.outputAddresses?.length ?? 1)
? bitcoin!.getEstimatedFeeWithFeeRate(wallet, value.round(), transactionInfo.amount)
: bitcoin!.getFeeAmountForPriority(
wallet,
priority,
transactionInfo.inputAddresses?.length ?? 1,
transactionInfo.outputAddresses?.length ?? 1);
wallet,
priority,
transactionInfo.inputAddresses?.length ?? 1,
transactionInfo.outputAddresses?.length ?? 1);
return bitcoin!.formatterBitcoinAmountToString(amount: newFee);
}

8
lib/view_model/wallet_creation_vm.dart
View file

@ -99,14 +99,14 @@ abstract class WalletCreationVMBase with Store {
case WalletType.litecoin:
return DerivationInfo(
derivationType: DerivationType.electrum,
derivationPath: "m/0'/0",
derivationPath: "m/0'",
);
default:
return null;
}
}
DerivationInfo? getMostCommonDerivation() {
DerivationInfo? getCommonRestoreDerivation() {
switch (this.type) {
case WalletType.nano:
return DerivationInfo(
@ -115,8 +115,10 @@ abstract class WalletCreationVMBase with Store {
case WalletType.bitcoin:
case WalletType.litecoin:
return DerivationInfo(
derivationType: DerivationType.electrum,
derivationType: DerivationType.bip39,
derivationPath: "m/84'/0'/0'/0",
description: "Standard BIP84 native segwit",
scriptType: "p2wpkh",
);
default:
return null;

2
tool/configure.dart
View file

@ -180,7 +180,7 @@ abstract class Bitcoin {
Future<bool> canReplaceByFee(Object wallet, String transactionHash);
Future<bool> isChangeSufficientForFee(Object wallet, String txId, String newFee);
int getFeeAmountForPriority(Object wallet, TransactionPriority priority, int inputsCount, int outputsCount, {int? size});
int getFeeAmountWithFeeRate(Object wallet, int feeRate, int inputsCount, int outputsCount, {int? size});
int getEstimatedFeeWithFeeRate(Object wallet, int feeRate, int? amount, {int? outputsCount, int? size});
int getMaxCustomFeeRate(Object wallet);
}
""";