cake_wallet/lib/view_model/send/send_view_model.dart

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import 'package:intl/intl.dart';
import 'package:mobx/mobx.dart';
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import 'package:cake_wallet/core/template_validator.dart';
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import 'package:cake_wallet/core/address_validator.dart';
import 'package:cake_wallet/core/amount_validator.dart';
import 'package:cake_wallet/core/pending_transaction.dart';
import 'package:cake_wallet/core/validator.dart';
import 'package:cake_wallet/core/wallet_base.dart';
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import 'package:cake_wallet/core/execution_state.dart';
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import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
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import 'package:cake_wallet/bitcoin/bitcoin_transaction_credentials.dart';
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import 'package:cake_wallet/monero/monero_wallet.dart';
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import 'package:cake_wallet/monero/monero_transaction_creation_credentials.dart';
import 'package:cake_wallet/entities/sync_status.dart';
import 'package:cake_wallet/entities/crypto_currency.dart';
import 'package:cake_wallet/entities/fiat_currency.dart';
import 'package:cake_wallet/entities/transaction_priority.dart';
import 'package:cake_wallet/entities/calculate_fiat_amount.dart';
import 'package:cake_wallet/entities/wallet_type.dart';
import 'package:cake_wallet/store/dashboard/fiat_conversion_store.dart';
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import 'package:cake_wallet/store/settings_store.dart';
import 'package:cake_wallet/view_model/send/send_view_model_state.dart';
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import 'package:cake_wallet/generated/i18n.dart';
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part 'send_view_model.g.dart';
class SendViewModel = SendViewModelBase with _$SendViewModel;
abstract class SendViewModelBase with Store {
SendViewModelBase(
this._wallet, this._settingsStore, this._fiatConversationStore)
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: state = InitialExecutionState(),
_cryptoNumberFormat = NumberFormat(),
sendAll = false {
_setCryptoNumMaximumFractionDigits();
}
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@observable
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ExecutionState state;
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@observable
String fiatAmount;
@observable
String cryptoAmount;
@observable
String address;
@observable
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bool sendAll;
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FiatCurrency get fiat => _settingsStore.fiatCurrency;
TransactionPriority get transactionPriority =>
_settingsStore.transactionPriority;
double get estimatedFee =>
_wallet.calculateEstimatedFee(_settingsStore.transactionPriority);
CryptoCurrency get currency => _wallet.currency;
Validator get amountValidator => AmountValidator(type: _wallet.type);
Validator get addressValidator => AddressValidator(type: _wallet.currency);
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Validator get templateValidator => TemplateValidator();
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PendingTransaction pendingTransaction;
@computed
String get balance {
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String balance = '0.0';
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if (_wallet is MoneroWallet) {
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balance = _wallet.balance.formattedUnlockedBalance as String ?? '';
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}
if (_wallet is BitcoinWallet) {
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balance = _wallet.balance.confirmedFormatted as String ?? '';
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}
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return balance;
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}
@computed
bool get isReadyForSend => _wallet.syncStatus is SyncedSyncStatus;
final WalletBase _wallet;
final SettingsStore _settingsStore;
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final FiatConversionStore _fiatConversationStore;
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final NumberFormat _cryptoNumberFormat;
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@action
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void setSendAll() => sendAll = true;
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@action
void reset() {
cryptoAmount = '';
fiatAmount = '';
address = '';
}
@action
Future<void> createTransaction() async {
try {
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state = IsExecutingState();
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pendingTransaction = await _wallet.createTransaction(_credentials());
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state = ExecutedSuccessfullyState();
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} catch (e) {
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state = FailureState(e.toString());
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}
}
@action
Future<void> commitTransaction() async {
try {
state = TransactionCommitting();
await pendingTransaction.commit();
state = TransactionCommitted();
} catch (e) {
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state = FailureState(e.toString());
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}
}
@action
void setCryptoAmount(String amount) {
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if (amount.toUpperCase() != S.current.all) {
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sendAll = false;
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}
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cryptoAmount = amount;
_updateFiatAmount();
}
@action
void setFiatAmount(String amount) {
fiatAmount = amount;
_updateCryptoAmount();
}
@action
void _updateFiatAmount() {
try {
final fiat = calculateFiatAmount(
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price: _fiatConversationStore.price,
cryptoAmount: cryptoAmount.replaceAll(',', '.'));
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if (fiatAmount != fiat) {
fiatAmount = fiat;
}
} catch (_) {
fiatAmount = '';
}
}
@action
void _updateCryptoAmount() {
try {
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final crypto = double.parse(fiatAmount.replaceAll(',', '.')) /
_fiatConversationStore.price;
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final cryptoAmountTmp = _cryptoNumberFormat.format(crypto);
if (cryptoAmount != cryptoAmountTmp) {
cryptoAmount = cryptoAmountTmp;
}
} catch (e) {
cryptoAmount = '';
}
}
Object _credentials() {
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final _amount = cryptoAmount.replaceAll(',', '.');
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switch (_wallet.type) {
case WalletType.bitcoin:
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final amount = !sendAll ? double.parse(_amount) : null;
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return BitcoinTransactionCredentials(
address, amount, _settingsStore.transactionPriority);
case WalletType.monero:
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final amount = !sendAll ? _amount : null;
return MoneroTransactionCreationCredentials(
address: address,
paymentId: '',
priority: _settingsStore.transactionPriority,
amount: amount);
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default:
return null;
}
}
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void _setCryptoNumMaximumFractionDigits() {
var maximumFractionDigits = 0;
switch (_wallet.type) {
case WalletType.monero:
maximumFractionDigits = 12;
break;
case WalletType.bitcoin:
maximumFractionDigits = 8;
break;
default:
break;
}
_cryptoNumberFormat.maximumFractionDigits = maximumFractionDigits;
}
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}