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cache currencies and revert if needed on switching exchanges where currencies aren't available on both exchanges

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This commit is contained in:
julian 2023-02-06 12:29:00 -06:00
parent f4737c5d95
commit 15207fc7f1
2 changed files with 127 additions and 10 deletions
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136
lib/models/exchange/exchange_form_state.dart
View file

@ -1,9 +1,14 @@
import 'package:decimal/decimal.dart';
import 'package:flutter/foundation.dart';
import 'package:isar/isar.dart';
import 'package:stackwallet/models/exchange/response_objects/estimate.dart';
import 'package:stackwallet/models/isar/exchange_cache/currency.dart';
import 'package:stackwallet/models/isar/exchange_cache/pair.dart';
import 'package:stackwallet/pages/exchange_view/sub_widgets/exchange_rate_sheet.dart';
import 'package:stackwallet/services/exchange/change_now/change_now_exchange.dart';
import 'package:stackwallet/services/exchange/exchange.dart';
import 'package:stackwallet/services/exchange/exchange_data_loading_service.dart';
import 'package:stackwallet/services/exchange/majestic_bank/majestic_bank_exchange.dart';
import 'package:stackwallet/utilities/logger.dart';
class ExchangeFormState extends ChangeNotifier {
@ -119,10 +124,10 @@ class ExchangeFormState extends ChangeNotifier {
if (_minReceiveAmount != null &&
_receiveAmount! < _minReceiveAmount! &&
_receiveAmount! > Decimal.zero) {
return "Minimum amount ${_minReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
return "Min receive amount ${_minReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
} else if (_maxReceiveAmount != null &&
_receiveAmount! > _maxReceiveAmount!) {
return "Maximum amount ${_maxReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
return "Max receive amount ${_maxReceiveAmount!.toString()} ${_receiveCurrency!.ticker.toUpperCase()}";
}
}
} else {
@ -130,9 +135,9 @@ class ExchangeFormState extends ChangeNotifier {
if (_minSendAmount != null &&
_sendAmount! < _minSendAmount! &&
_sendAmount! > Decimal.zero) {
return "Minimum amount ${_minSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
return "Min send amount ${_minSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
} else if (_maxSendAmount != null && _sendAmount! > _maxSendAmount!) {
return "Maximum amount ${_maxSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
return "Max send amount ${_maxSendAmount!.toString()} ${_sendCurrency!.ticker.toUpperCase()}";
}
}
}
@ -151,6 +156,73 @@ class ExchangeFormState extends ChangeNotifier {
}) async {
_exchange = exchange;
if (shouldUpdateData) {
if (_sendCurrency != null) {
_sendCurrency = await ExchangeDataLoadingService
.instance.isar.currencies
.where()
.exchangeNameEqualTo(exchange.name)
.filter()
.tickerEqualTo(_sendCurrency!.ticker)
.and()
.group((q) => exchangeRateType == ExchangeRateType.fixed
? q
.rateTypeEqualTo(SupportedRateType.both)
.or()
.rateTypeEqualTo(SupportedRateType.fixed)
: q
.rateTypeEqualTo(SupportedRateType.both)
.or()
.rateTypeEqualTo(SupportedRateType.estimated))
.findFirst();
}
if (_sendCurrency == null) {
switch (exchange.name) {
case ChangeNowExchange.exchangeName:
_sendCurrency = _cachedSendCN;
break;
case MajesticBankExchange.exchangeName:
_sendCurrency = _cachedSendMB;
break;
}
}
if (_receiveCurrency != null) {
_receiveCurrency = await ExchangeDataLoadingService
.instance.isar.currencies
.where()
.exchangeNameEqualTo(exchange.name)
.filter()
.tickerEqualTo(_receiveCurrency!.ticker)
.and()
.group((q) => exchangeRateType == ExchangeRateType.fixed
? q
.rateTypeEqualTo(SupportedRateType.both)
.or()
.rateTypeEqualTo(SupportedRateType.fixed)
: q
.rateTypeEqualTo(SupportedRateType.both)
.or()
.rateTypeEqualTo(SupportedRateType.estimated))
.findFirst();
}
if (_receiveCurrency == null) {
switch (exchange.name) {
case ChangeNowExchange.exchangeName:
_receiveCurrency = _cachedReceivingCN;
break;
case MajesticBankExchange.exchangeName:
_receiveCurrency = _cachedReceivingMB;
break;
}
}
_updateCachedCurrencies(
exchangeName: exchange.name,
send: _sendCurrency,
receiving: _receiveCurrency,
);
await _updateRangesAndEstimate(
shouldNotifyListeners: false,
);
@ -164,6 +236,11 @@ class ExchangeFormState extends ChangeNotifier {
void setCurrencies(Currency from, Currency to) {
_sendCurrency = from;
_receiveCurrency = to;
_updateCachedCurrencies(
exchangeName: exchange.name,
send: _sendCurrency,
receiving: _receiveCurrency,
);
}
void reset({
@ -247,6 +324,12 @@ class ExchangeFormState extends ChangeNotifier {
_minSendAmount = null;
_maxSendAmount = null;
_updateCachedCurrencies(
exchangeName: exchange.name,
send: _sendCurrency,
receiving: _receiveCurrency,
);
if (_receiveCurrency == null) {
_rate = null;
} else {
@ -271,6 +354,12 @@ class ExchangeFormState extends ChangeNotifier {
_minReceiveAmount = null;
_maxReceiveAmount = null;
_updateCachedCurrencies(
exchangeName: exchange.name,
send: _sendCurrency,
receiving: _receiveCurrency,
);
if (_sendCurrency == null) {
_rate = null;
} else {
@ -302,6 +391,12 @@ class ExchangeFormState extends ChangeNotifier {
_sendCurrency = receiveCurrency;
_receiveCurrency = tmp;
_updateCachedCurrencies(
exchangeName: exchange.name,
send: _sendCurrency,
receiving: _receiveCurrency,
);
await _updateRangesAndEstimate(
shouldNotifyListeners: false,
);
@ -442,6 +537,34 @@ class ExchangeFormState extends ChangeNotifier {
}
//============================================================================
Currency? _cachedReceivingMB;
Currency? _cachedSendMB;
Currency? _cachedReceivingCN;
Currency? _cachedSendCN;
void _updateCachedCurrencies({
required String exchangeName,
required Currency? send,
required Currency? receiving,
}) {
switch (exchangeName) {
case ChangeNowExchange.exchangeName:
_cachedSendCN = send ?? _cachedSendCN;
_cachedReceivingCN = receiving ?? _cachedReceivingCN;
break;
case MajesticBankExchange.exchangeName:
_cachedSendMB = send ?? _cachedSendMB;
_cachedReceivingMB = receiving ?? _cachedReceivingMB;
break;
}
}
void _notify() {
debugPrint("ExFState NOTIFY: ${toString()}");
notifyListeners();
}
@override
String toString() {
return "{"
@ -462,9 +585,4 @@ class ExchangeFormState extends ChangeNotifier {
"\n\t warning: $warning,"
"\n}";
}
void _notify() {
debugPrint("ExFState NOTIFY: ${toString()}");
notifyListeners();
}
}

1
lib/services/exchange/majestic_bank/majestic_bank_exchange.dart
View file

@ -162,7 +162,6 @@ class MajesticBankExchange extends Exchange {
receiveCurrency: to,
);
if (response.value == null) {
print("AAAAAAAAAAAAAAAAAAAA ${response.exception}");
return ExchangeResponse(exception: response.exception);
}