2023-05-03 20:03:31 +00:00
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// import 'dart:async';
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//
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// import 'package:decimal/decimal.dart';
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// import 'package:flutter/foundation.dart';
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// import 'package:stackwallet/models/exchange/aggregate_currency.dart';
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// import 'package:stackwallet/models/exchange/response_objects/estimate.dart';
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// import 'package:stackwallet/services/exchange/change_now/change_now_exchange.dart';
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// import 'package:stackwallet/services/exchange/exchange.dart';
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// import 'package:stackwallet/services/exchange/majestic_bank/majestic_bank_exchange.dart';
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// import 'package:stackwallet/services/exchange/trocador/trocador_exchange.dart';
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// import 'package:stackwallet/utilities/enums/exchange_rate_type_enum.dart';
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// import 'package:stackwallet/utilities/logger.dart';
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//
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// class ExchangeFormState extends ChangeNotifier {
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// Exchange? _exchange;
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// Exchange get exchange => _exchange ??= Exchange.defaultExchange;
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//
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// String? _providerName;
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// // default to exchange name that isn't trocador
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// String get providerName => _providerName ??= Exchange.defaultExchange.name;
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//
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// String get combinedExchangeId => "${exchange.name} ($providerName)";
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//
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// ExchangeRateType _exchangeRateType = ExchangeRateType.estimated;
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// ExchangeRateType get exchangeRateType => _exchangeRateType;
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// set exchangeRateType(ExchangeRateType exchangeRateType) {
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// _exchangeRateType = exchangeRateType;
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// //
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// }
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//
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// List<Estimate> _estimates = [];
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// List<Estimate> get estimates => _estimates;
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//
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// bool _reversed = false;
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// bool get reversed => _reversed;
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// set reversed(bool reversed) {
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// _reversed = reversed;
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// //
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// }
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//
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// Decimal? _rate;
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// Decimal? get rate => _rate;
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// // set rate(Decimal? rate) {
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// // _rate = rate;
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// // //
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// // }
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//
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// Decimal? _sendAmount;
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// Decimal? get sendAmount => _sendAmount;
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// // set sendAmount(Decimal? sendAmount) {
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// // _sendAmount = sendAmount;
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// // //
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// // }
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//
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// Decimal? _receiveAmount;
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// Decimal? get receiveAmount => _receiveAmount;
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// set receiveAmount(Decimal? receiveAmount) {
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// _receiveAmount = receiveAmount;
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// //
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// }
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//
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// AggregateCurrency? _sendCurrency;
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// AggregateCurrency? get sendCurrency => _sendCurrency;
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// // set sendCurrency(Currency? sendCurrency) {
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// // _sendCurrency = sendCurrency;
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// // //
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// // }
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//
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// AggregateCurrency? _receiveCurrency;
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// AggregateCurrency? get receiveCurrency => _receiveCurrency;
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// // set receiveCurrency(Currency? receiveCurrency) {
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// // _receiveCurrency = receiveCurrency;
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// // //
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// // }
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//
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// Decimal? _minSendAmount;
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// Decimal? get minSendAmount => _minSendAmount;
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// // set minSendAmount(Decimal? minSendAmount) {
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// // _minSendAmount = minSendAmount;
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// // //
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// // }
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//
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// Decimal? _minReceiveAmount;
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// Decimal? get minReceiveAmount => _minReceiveAmount;
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// // set minReceiveAmount(Decimal? minReceiveAmount) {
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// // _minReceiveAmount = minReceiveAmount;
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// // //
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// // }
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//
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// Decimal? _maxSendAmount;
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// Decimal? get maxSendAmount => _maxSendAmount;
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// // set maxSendAmount(Decimal? maxSendAmount) {
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// // _maxSendAmount = maxSendAmount;
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// // //
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// // }
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//
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// Decimal? _maxReceiveAmount;
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// Decimal? get maxReceiveAmount => _maxReceiveAmount;
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// // set maxReceiveAmount(Decimal? maxReceiveAmount) {
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// // _maxReceiveAmount = maxReceiveAmount;
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// // //
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// // }
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//
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// //============================================================================
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// // computed properties
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// //============================================================================
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//
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// String? get fromTicker => _sendCurrency?.ticker;
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// String? get toTicker => _receiveCurrency?.ticker;
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//
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// String get fromAmountString => _sendAmount?.toStringAsFixed(8) ?? "";
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// String get toAmountString => _receiveAmount?.toStringAsFixed(8) ?? "";
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//
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// bool get canExchange {
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// return sendCurrency != null &&
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// receiveCurrency != null &&
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// sendAmount != null &&
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// sendAmount! >= Decimal.zero &&
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// receiveAmount != null &&
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// rate != null &&
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// rate! >= Decimal.zero &&
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// sendCurrency!.forExchange(exchange.name) != null &&
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// receiveCurrency!.forExchange(exchange.name) != null &&
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// warning.isEmpty;
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// }
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//
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// String get warning {
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// if (reversed) {
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// if (_receiveCurrency != null && _receiveAmount != null) {
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// if (_minReceiveAmount != null &&
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// _receiveAmount! < _minReceiveAmount! &&
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// _receiveAmount! > Decimal.zero) {
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// return "Min receive amount ${_minReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
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// } else if (_maxReceiveAmount != null &&
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// _receiveAmount! > _maxReceiveAmount!) {
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// return "Max receive amount ${_maxReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
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// }
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// }
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// } else {
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// if (_sendCurrency != null && _sendAmount != null) {
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// if (_minSendAmount != null &&
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// _sendAmount! < _minSendAmount! &&
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// _sendAmount! > Decimal.zero) {
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// return "Min send amount ${_minSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
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// } else if (_maxSendAmount != null && _sendAmount! > _maxSendAmount!) {
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// return "Max send amount ${_maxSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
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// }
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// }
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// }
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//
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// return "";
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// }
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//
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// //============================================================================
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// // public state updaters
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// //============================================================================
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//
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// Future<void> updateExchange({
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// required Exchange exchange,
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// required String providerName,
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// required bool shouldUpdateData,
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// required bool shouldNotifyListeners,
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// bool shouldAwait = true,
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// }) async {
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// _exchange = exchange;
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// _providerName = providerName;
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// // if (shouldNotifyListeners) {
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// _notify();
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// // }
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// if (shouldUpdateData) {
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// if (shouldAwait) {
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: shouldNotifyListeners,
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// );
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// } else {
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// unawaited(
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// _updateRangesAndEstimate(
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// shouldNotifyListeners: shouldNotifyListeners,
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// ),
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// );
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// }
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// }
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// }
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//
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// void setCurrencies(AggregateCurrency? from, AggregateCurrency? to) {
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// _sendCurrency = from;
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// _receiveCurrency = to;
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// }
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//
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// void reset({
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// required bool shouldNotifyListeners,
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// }) {
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// _exchange = null;
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// _providerName = null;
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// _reversed = false;
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// _rate = null;
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// _sendAmount = null;
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// _receiveAmount = null;
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// _sendCurrency = null;
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// _receiveCurrency = null;
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// _minSendAmount = null;
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// _minReceiveAmount = null;
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// _maxSendAmount = null;
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// _maxReceiveAmount = null;
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//
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// if (shouldNotifyListeners) {
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// _notify();
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// }
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// }
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//
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// Future<void> setSendAmountAndCalculateReceiveAmount(
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// Decimal? newSendAmount,
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// bool shouldNotifyListeners,
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// ) async {
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// if (newSendAmount == null) {
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// // todo: check if this breaks things and stuff
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// _receiveAmount = null;
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// _sendAmount = null;
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// } else {
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// if (newSendAmount <= Decimal.zero) {
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// _receiveAmount = null;
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// }
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//
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// _sendAmount = newSendAmount;
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// _reversed = false;
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//
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// if (_sendAmount! > Decimal.zero) {
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: false,
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// );
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// }
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// }
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//
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// if (shouldNotifyListeners) {
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// _notify();
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// }
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// }
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//
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// Future<void> setReceivingAmountAndCalculateSendAmount(
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// Decimal? newReceiveAmount,
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// bool shouldNotifyListeners,
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// ) async {
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// if (newReceiveAmount == null) {
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// // todo: check if this breaks things and stuff
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// _receiveAmount = null;
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// _sendAmount = null;
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// } else {
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// if (newReceiveAmount <= Decimal.zero) {
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// _sendAmount = Decimal.zero;
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// }
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//
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// _receiveAmount = newReceiveAmount;
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// _reversed = true;
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//
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: false,
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// );
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// }
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//
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// if (shouldNotifyListeners) {
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// _notify();
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// }
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// }
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//
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// Future<void> updateSendCurrency(
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// AggregateCurrency sendCurrency,
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// bool shouldNotifyListeners,
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// ) async {
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// try {
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// _sendCurrency = sendCurrency;
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// _minSendAmount = null;
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// _maxSendAmount = null;
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//
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// if (_receiveCurrency == null) {
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// _rate = null;
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// } else {
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: false,
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// );
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// }
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// if (shouldNotifyListeners) {
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// _notify();
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// }
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// } catch (e, s) {
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// Logging.instance.log("$e\n$s", level: LogLevel.Error);
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// }
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// }
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//
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// Future<void> updateReceivingCurrency(
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// AggregateCurrency receiveCurrency,
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// bool shouldNotifyListeners,
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// ) async {
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// try {
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// _receiveCurrency = receiveCurrency;
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// _minReceiveAmount = null;
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// _maxReceiveAmount = null;
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//
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// if (_sendCurrency == null) {
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// _rate = null;
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// } else {
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: false,
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// );
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// }
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// if (shouldNotifyListeners) {
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// _notify();
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// }
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// } catch (e, s) {
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// Logging.instance.log("$e\n$s", level: LogLevel.Error);
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// }
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// }
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//
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// Future<void> swap({
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// required bool shouldNotifyListeners,
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// }) async {
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// final Decimal? temp = sendAmount;
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// _sendAmount = receiveAmount;
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// _receiveAmount = temp;
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//
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// _minSendAmount = null;
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// _maxSendAmount = null;
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// _minReceiveAmount = null;
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// _maxReceiveAmount = null;
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//
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// final AggregateCurrency? tmp = sendCurrency;
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// _sendCurrency = receiveCurrency;
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// _receiveCurrency = tmp;
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//
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// await _updateRangesAndEstimate(
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// shouldNotifyListeners: false,
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// );
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//
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// if (shouldNotifyListeners) {
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// _notify();
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|
|
|
|
// }
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// Future<void> refresh() => _updateRangesAndEstimate(
|
|
|
|
|
// shouldNotifyListeners: true,
|
|
|
|
|
// );
|
|
|
|
|
//
|
|
|
|
|
// //============================================================================
|
|
|
|
|
// // private state updaters
|
|
|
|
|
// //============================================================================
|
|
|
|
|
//
|
|
|
|
|
// Future<void> _updateRangesAndEstimate({
|
|
|
|
|
// required bool shouldNotifyListeners,
|
|
|
|
|
// bool shouldAwait = true,
|
|
|
|
|
// }) async {
|
|
|
|
|
// try {
|
|
|
|
|
// switch (exchange.name) {
|
|
|
|
|
// case ChangeNowExchange.exchangeName:
|
|
|
|
|
// if (!_exchangeSupported(
|
|
|
|
|
// exchangeName: exchange.name,
|
|
|
|
|
// sendCurrency: sendCurrency,
|
|
|
|
|
// receiveCurrency: receiveCurrency,
|
|
|
|
|
// exchangeRateType: exchangeRateType,
|
|
|
|
|
// )) {
|
|
|
|
|
// _exchange = MajesticBankExchange.instance;
|
|
|
|
|
// }
|
|
|
|
|
// break;
|
|
|
|
|
// case MajesticBankExchange.exchangeName:
|
|
|
|
|
// if (!_exchangeSupported(
|
|
|
|
|
// exchangeName: exchange.name,
|
|
|
|
|
// sendCurrency: sendCurrency,
|
|
|
|
|
// receiveCurrency: receiveCurrency,
|
|
|
|
|
// exchangeRateType: exchangeRateType,
|
|
|
|
|
// )) {
|
|
|
|
|
// _exchange = ChangeNowExchange.instance;
|
|
|
|
|
// }
|
|
|
|
|
// break;
|
|
|
|
|
// case TrocadorExchange.exchangeName:
|
|
|
|
|
// if (!_exchangeSupported(
|
|
|
|
|
// exchangeName: exchange.name,
|
|
|
|
|
// sendCurrency: sendCurrency,
|
|
|
|
|
// receiveCurrency: receiveCurrency,
|
|
|
|
|
// exchangeRateType: exchangeRateType,
|
|
|
|
|
// )) {
|
|
|
|
|
// _exchange = ChangeNowExchange.instance;
|
|
|
|
|
// }
|
|
|
|
|
// break;
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// if (shouldAwait) {
|
|
|
|
|
// await _updateRanges(shouldNotifyListeners: false);
|
|
|
|
|
// await _updateEstimate(shouldNotifyListeners: false);
|
|
|
|
|
// if (shouldNotifyListeners) {
|
|
|
|
|
// _notify();
|
|
|
|
|
// }
|
|
|
|
|
// } else {
|
|
|
|
|
// unawaited(
|
|
|
|
|
// _updateRanges(shouldNotifyListeners: false).then(
|
|
|
|
|
// (_) => _updateEstimate(shouldNotifyListeners: false).then(
|
|
|
|
|
// (_) {
|
|
|
|
|
// if (shouldNotifyListeners) {
|
|
|
|
|
// _notify();
|
|
|
|
|
// }
|
|
|
|
|
// },
|
|
|
|
|
// ),
|
|
|
|
|
// ),
|
|
|
|
|
// );
|
|
|
|
|
// }
|
|
|
|
|
// } catch (_) {
|
|
|
|
|
// //
|
|
|
|
|
// }
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// Future<void> _updateRanges({
|
|
|
|
|
// required bool shouldNotifyListeners,
|
|
|
|
|
// }) async {
|
|
|
|
|
// // if (exchange?.name == SimpleSwapExchange.exchangeName) {
|
|
|
|
|
// // reversed = false;
|
|
|
|
|
// // }
|
|
|
|
|
// final _send = sendCurrency;
|
|
|
|
|
// final _receive = receiveCurrency;
|
|
|
|
|
// if (_send == null || _receive == null) {
|
|
|
|
|
// Logging.instance.log(
|
|
|
|
|
// "Tried to $runtimeType.updateRanges where ( $_send || $_receive) for: $exchange",
|
|
|
|
|
// level: LogLevel.Info,
|
|
|
|
|
// );
|
|
|
|
|
// return;
|
|
|
|
|
// }
|
|
|
|
|
// final response = await exchange.getRange(
|
|
|
|
|
// _send.ticker,
|
|
|
|
|
// _receive.ticker,
|
|
|
|
|
// exchangeRateType == ExchangeRateType.fixed,
|
|
|
|
|
// );
|
|
|
|
|
//
|
|
|
|
|
// if (response.value == null) {
|
|
|
|
|
// Logging.instance.log(
|
|
|
|
|
// "Tried to $runtimeType.updateRanges for: $exchange where response: $response",
|
|
|
|
|
// level: LogLevel.Info,
|
|
|
|
|
// );
|
|
|
|
|
// return;
|
|
|
|
|
// }
|
|
|
|
|
// final responseReversed = await exchange.getRange(
|
|
|
|
|
// _receive.ticker,
|
|
|
|
|
// _send.ticker,
|
|
|
|
|
// exchangeRateType == ExchangeRateType.fixed,
|
|
|
|
|
// );
|
|
|
|
|
//
|
|
|
|
|
// if (responseReversed.value == null) {
|
|
|
|
|
// Logging.instance.log(
|
|
|
|
|
// "Tried to $runtimeType.updateRanges for: $exchange where response: $responseReversed",
|
|
|
|
|
// level: LogLevel.Info,
|
|
|
|
|
// );
|
|
|
|
|
// return;
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// final range = response.value!;
|
|
|
|
|
// final rangeReversed = responseReversed.value!;
|
|
|
|
|
//
|
|
|
|
|
// _minSendAmount = range.min;
|
|
|
|
|
// _maxSendAmount = range.max;
|
|
|
|
|
// _minReceiveAmount = rangeReversed.min;
|
|
|
|
|
// _maxReceiveAmount = rangeReversed.max;
|
|
|
|
|
//
|
|
|
|
|
// //todo: check if print needed
|
|
|
|
|
// // debugPrint(
|
|
|
|
|
// // "updated range for: $exchange for $_fromTicker-$_toTicker: $range");
|
|
|
|
|
//
|
|
|
|
|
// if (shouldNotifyListeners) {
|
|
|
|
|
// _notify();
|
|
|
|
|
// }
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// Future<void> _updateEstimate({
|
|
|
|
|
// required bool shouldNotifyListeners,
|
|
|
|
|
// }) async {
|
|
|
|
|
// // if (exchange?.name == SimpleSwapExchange.exchangeName) {
|
|
|
|
|
// // reversed = false;
|
|
|
|
|
// // }
|
|
|
|
|
// final amount = reversed ? receiveAmount : sendAmount;
|
|
|
|
|
// if (sendCurrency == null ||
|
|
|
|
|
// receiveCurrency == null ||
|
|
|
|
|
// amount == null ||
|
|
|
|
|
// amount <= Decimal.zero) {
|
|
|
|
|
// Logging.instance.log(
|
|
|
|
|
// "Tried to $runtimeType.updateEstimate for: $exchange where (from: $sendCurrency || to: $receiveCurrency || amount: $amount)",
|
|
|
|
|
// level: LogLevel.Info,
|
|
|
|
|
// );
|
|
|
|
|
// return;
|
|
|
|
|
// }
|
|
|
|
|
// final response = await exchange.getEstimates(
|
|
|
|
|
// sendCurrency!.ticker,
|
|
|
|
|
// receiveCurrency!.ticker,
|
|
|
|
|
// amount,
|
|
|
|
|
// exchangeRateType == ExchangeRateType.fixed,
|
|
|
|
|
// reversed,
|
|
|
|
|
// );
|
|
|
|
|
//
|
|
|
|
|
// if (response.value == null) {
|
|
|
|
|
// Logging.instance.log(
|
|
|
|
|
// "Tried to $runtimeType.updateEstimate for: $exchange where response: $response",
|
|
|
|
|
// level: LogLevel.Info,
|
|
|
|
|
// );
|
|
|
|
|
// return;
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// _estimates = response.value!;
|
|
|
|
|
//
|
|
|
|
|
// if (reversed) {
|
|
|
|
|
// _sendAmount = _estimates
|
|
|
|
|
// .firstWhere((e) => e.exchangeProvider == providerName)
|
|
|
|
|
// .estimatedAmount;
|
|
|
|
|
// } else {
|
|
|
|
|
// _receiveAmount = _estimates
|
|
|
|
|
// .firstWhere((e) => e.exchangeProvider == providerName)
|
|
|
|
|
// .estimatedAmount;
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// _rate =
|
|
|
|
|
// (receiveAmount! / sendAmount!).toDecimal(scaleOnInfinitePrecision: 12);
|
|
|
|
|
//
|
|
|
|
|
// //todo: check if print needed
|
|
|
|
|
// // debugPrint(
|
|
|
|
|
// // "updated estimate for: $exchange for $fromTicker-$toTicker: $estimate");
|
|
|
|
|
//
|
|
|
|
|
// if (shouldNotifyListeners) {
|
|
|
|
|
// _notify();
|
|
|
|
|
// }
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// //============================================================================
|
|
|
|
|
//
|
|
|
|
|
// void _notify() {
|
|
|
|
|
// debugPrint("ExFState NOTIFY: ${toString()}");
|
|
|
|
|
// notifyListeners();
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// bool _exchangeSupported({
|
|
|
|
|
// required String exchangeName,
|
|
|
|
|
// required AggregateCurrency? sendCurrency,
|
|
|
|
|
// required AggregateCurrency? receiveCurrency,
|
|
|
|
|
// required ExchangeRateType exchangeRateType,
|
|
|
|
|
// }) {
|
|
|
|
|
// final send = sendCurrency?.forExchange(exchangeName);
|
|
|
|
|
// if (send == null) return false;
|
|
|
|
|
//
|
|
|
|
|
// final rcv = receiveCurrency?.forExchange(exchangeName);
|
|
|
|
|
// if (rcv == null) return false;
|
|
|
|
|
//
|
|
|
|
|
// if (exchangeRateType == ExchangeRateType.fixed) {
|
|
|
|
|
// return send.supportsFixedRate && rcv.supportsFixedRate;
|
|
|
|
|
// } else {
|
|
|
|
|
// return send.supportsEstimatedRate && rcv.supportsEstimatedRate;
|
|
|
|
|
// }
|
|
|
|
|
// }
|
|
|
|
|
//
|
|
|
|
|
// @override
|
|
|
|
|
// String toString() {
|
|
|
|
|
// return "{"
|
|
|
|
|
// "\n\t exchange: $exchange,"
|
|
|
|
|
// "\n\t exchangeRateType: $exchangeRateType,"
|
|
|
|
|
// "\n\t sendCurrency: $sendCurrency,"
|
|
|
|
|
// "\n\t receiveCurrency: $receiveCurrency,"
|
|
|
|
|
// "\n\t rate: $rate,"
|
|
|
|
|
// "\n\t reversed: $reversed,"
|
|
|
|
|
// "\n\t sendAmount: $sendAmount,"
|
|
|
|
|
// "\n\t receiveAmount: $receiveAmount,"
|
|
|
|
|
// "\n\t estimates: $estimates,"
|
|
|
|
|
// "\n\t minSendAmount: $minSendAmount,"
|
|
|
|
|
// "\n\t maxSendAmount: $maxSendAmount,"
|
|
|
|
|
// "\n\t minReceiveAmount: $minReceiveAmount,"
|
|
|
|
|
// "\n\t maxReceiveAmount: $maxReceiveAmount,"
|
|
|
|
|
// "\n\t canExchange: $canExchange,"
|
|
|
|
|
// "\n\t warning: $warning,"
|
|
|
|
|
// "\n}";
|
|
|
|
|
// }
|
|
|
|
|
// }
|
