| 1 | import 'dart:async'; |
| 2 | import 'package:cake_wallet/exchange/provider/jupiter_exchange_provider.dart'; |
| 3 | import 'package:cake_wallet/exchange/provider/near_Intents_exchange_provider.dart'; |
| 4 | import 'package:cake_wallet/exchange/provider/simpleswap_exchange_provider.dart'; |
| 5 | import 'package:cake_wallet/exchange/provider/swapsxyz_exchange_provider.dart'; |
| 6 | import 'package:cake_wallet/exchange/trade.dart'; |
| 7 | import 'package:cake_wallet/exchange/trade_state.dart'; |
| 8 | import 'package:cake_wallet/store/dashboard/trades_store.dart'; |
| 9 | import 'package:cake_wallet/entities/exchange_api_mode.dart'; |
| 10 | import 'package:cake_wallet/exchange/exchange_provider_description.dart'; |
| 11 | import 'package:cake_wallet/exchange/provider/chainflip_exchange_provider.dart'; |
| 12 | import 'package:cake_wallet/exchange/provider/changenow_exchange_provider.dart'; |
| 13 | import 'package:cake_wallet/exchange/provider/exchange_provider.dart'; |
| 14 | import 'package:cake_wallet/exchange/provider/exolix_exchange_provider.dart'; |
| 15 | import 'package:cake_wallet/exchange/provider/letsexchange_exchange_provider.dart'; |
| 16 | import 'package:cake_wallet/exchange/provider/swaptrade_exchange_provider.dart'; |
| 17 | import 'package:cake_wallet/exchange/provider/sideshift_exchange_provider.dart'; |
| 18 | import 'package:cake_wallet/exchange/provider/stealth_ex_exchange_provider.dart'; |
| 19 | import 'package:cake_wallet/exchange/provider/thorchain_exchange.provider.dart'; |
| 20 | import 'package:cake_wallet/exchange/provider/trocador_exchange_provider.dart'; |
| 21 | import 'package:cake_wallet/exchange/provider/xoswap_exchange_provider.dart'; |
| 22 | import 'package:cw_core/utils/print_verbose.dart'; |
| 23 | import 'package:cake_wallet/store/app_store.dart'; |
| 24 | import 'package:shared_preferences/shared_preferences.dart'; |
| 25 | |
| 26 | class TradeMonitor { |
| 27 | static const int _tradeCheckIntervalMinutes = 5; |
| 28 | static const int _maxTradeAgeHours = 24; |
| 29 | |
| 30 | TradeMonitor({ |
| 31 | required this.tradesStore, |
| 32 | required this.appStore, |
| 33 | required this.preferences, |
| 34 | }); |
| 35 | |
| 36 | final TradesStore tradesStore; |
| 37 | final AppStore appStore; |
| 38 | final Map<String, Timer> _tradeTimers = {}; |
| 39 | final SharedPreferences preferences; |
| 40 | |
| 41 | ExchangeProvider? _getProviderByDescription(ExchangeProviderDescription description) { |
| 42 | switch (description) { |
| 43 | case ExchangeProviderDescription.changeNow: |
| 44 | return ChangeNowExchangeProvider(settingsStore: appStore.settingsStore); |
| 45 | case ExchangeProviderDescription.sideShift: |
| 46 | return SideShiftExchangeProvider(); |
| 47 | case ExchangeProviderDescription.simpleSwap: |
| 48 | return SimpleSwapExchangeProvider(); |
| 49 | case ExchangeProviderDescription.trocador: |
| 50 | return TrocadorExchangeProvider(); |
| 51 | case ExchangeProviderDescription.exolix: |
| 52 | return ExolixExchangeProvider(); |
| 53 | case ExchangeProviderDescription.thorChain: |
| 54 | return ThorChainExchangeProvider(); |
| 55 | case ExchangeProviderDescription.swapTrade: |
| 56 | return SwapTradeExchangeProvider(); |
| 57 | case ExchangeProviderDescription.letsExchange: |
| 58 | return LetsExchangeExchangeProvider(); |
| 59 | case ExchangeProviderDescription.stealthEx: |
| 60 | return StealthExExchangeProvider(); |
| 61 | case ExchangeProviderDescription.chainflip: |
| 62 | return ChainflipExchangeProvider(); |
| 63 | case ExchangeProviderDescription.xoSwap: |
| 64 | return XOSwapExchangeProvider(); |
| 65 | case ExchangeProviderDescription.swapsXyz: |
| 66 | return SwapsXyzExchangeProvider(); |
| 67 | case ExchangeProviderDescription.jupiter: |
| 68 | return JupiterExchangeProvider(); |
| 69 | case ExchangeProviderDescription.nearIntents: |
| 70 | return NearIntentsExchangeProvider(); |
| 71 | } |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | void monitorActiveTrades(String walletId) { |
| 76 | // Checks if the trade monitoring is permitted |
| 77 | // i.e the user has not disabled the exchange api mode or the status updates |
| 78 | final isTradeMonitoringPermitted = _isTradeMonitoringPermitted(); |
| 79 | if (!isTradeMonitoringPermitted) { |
| 80 | return; |
| 81 | } |
| 82 | |
| 83 | final trades = tradesStore.trades; |
| 84 | final tradesToCancel = <String>[]; |
| 85 | |
| 86 | for (final item in trades) { |
| 87 | final trade = item.trade; |
| 88 | |
| 89 | final provider = _getProviderByDescription(trade.provider); |
| 90 | |
| 91 | // Multiple checks to see if to skip the trade, if yes, we cancel the timer if it exists |
| 92 | if (_shouldSkipTrade(trade, walletId, provider)) { |
| 93 | tradesToCancel.add(trade.id); |
| 94 | continue; |
| 95 | } |
| 96 | |
| 97 | if (_tradeTimers.containsKey(trade.id)) { |
| 98 | continue; |
| 99 | } else { |
| 100 | _startTradeMonitoring(trade, provider!); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | // After going through the list of available trades, we cancel the timers in the tradesToCancel list |
| 105 | _cancelMultipleTradeTimers(tradesToCancel); |
| 106 | } |
| 107 | |
| 108 | bool _isTradeMonitoringPermitted() { |
| 109 | final disableAutomaticExchangeStatusUpdates = |
| 110 | appStore.settingsStore.disableAutomaticExchangeStatusUpdates; |
| 111 | if (disableAutomaticExchangeStatusUpdates) { |
| 112 | printV('Automatic exchange status updates are disabled'); |
| 113 | return false; |
| 114 | } |
| 115 | |
| 116 | final exchangeApiMode = appStore.settingsStore.exchangeStatus; |
| 117 | if (exchangeApiMode == ExchangeApiMode.disabled) { |
| 118 | printV('Exchange API mode is disabled'); |
| 119 | return false; |
| 120 | } |
| 121 | |
| 122 | return true; |
| 123 | } |
| 124 | |
| 125 | bool _shouldSkipTrade(Trade trade, String walletId, ExchangeProvider? provider) { |
| 126 | if (trade.walletId != walletId) { |
| 127 | return true; |
| 128 | } |
| 129 | |
| 130 | final createdAt = trade.createdAt; |
| 131 | if (createdAt == null) { |
| 132 | printV('Skipping trade ${trade.id} because it has no createdAt'); |
| 133 | return true; |
| 134 | } |
| 135 | |
| 136 | if (DateTime.now().difference(createdAt).inHours > _maxTradeAgeHours) { |
| 137 | printV('Skipping trade ${trade.id} because it\'s older than ${_maxTradeAgeHours} hours'); |
| 138 | return true; |
| 139 | } |
| 140 | |
| 141 | if (_isFinalState(trade.state)) { |
| 142 | return true; |
| 143 | } |
| 144 | |
| 145 | if (provider == null) { |
| 146 | printV('Skipping trade ${trade.id} because the provider is not supported'); |
| 147 | return true; |
| 148 | } |
| 149 | |
| 150 | if (appStore.settingsStore.exchangeStatus == ExchangeApiMode.torOnly && |
| 151 | !provider.supportsOnionAddress) { |
| 152 | printV('Skipping ${provider.description}, no TOR support'); |
| 153 | return true; |
| 154 | } |
| 155 | |
| 156 | return false; |
| 157 | } |
| 158 | |
| 159 | void _startTradeMonitoring(Trade trade, ExchangeProvider provider) { |
| 160 | final timer = Timer.periodic( |
| 161 | Duration(minutes: _tradeCheckIntervalMinutes), |
| 162 | (_) => _checkTradeStatus(trade, provider), |
| 163 | ); |
| 164 | |
| 165 | _checkTradeStatus(trade, provider); |
| 166 | |
| 167 | _tradeTimers[trade.id] = timer; |
| 168 | } |
| 169 | |
| 170 | Future<void> _checkTradeStatus(Trade trade, ExchangeProvider provider) async { |
| 171 | final lastUpdatedAtFromPrefs = preferences.getString('trade_${trade.id}_updated_at'); |
| 172 | |
| 173 | if (lastUpdatedAtFromPrefs != null) { |
| 174 | final lastUpdatedAtDateTime = DateTime.parse(lastUpdatedAtFromPrefs); |
| 175 | final timeSinceLastUpdate = DateTime.now().difference(lastUpdatedAtDateTime).inMinutes; |
| 176 | |
| 177 | if (timeSinceLastUpdate < _tradeCheckIntervalMinutes) { |
| 178 | printV( |
| 179 | 'Skipping trade ${trade.id} status update check because it was updated less than ${_tradeCheckIntervalMinutes} minutes ago ($timeSinceLastUpdate minutes ago)', |
| 180 | ); |
| 181 | return; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | try { |
| 186 | final updated = await provider.findTradeById(id: trade.id); |
| 187 | trade.mergeFindTradeByIdResult(updated); |
| 188 | printV('Trade ${trade.id} updated: ${trade.state}'); |
| 189 | await trade.save(); |
| 190 | |
| 191 | await preferences.setString('trade_${trade.id}_updated_at', DateTime.now().toIso8601String()); |
| 192 | printV('Trade ${trade.id} updated at: ${DateTime.now().toIso8601String()}'); |
| 193 | |
| 194 | // If the updated trade is in a final state, we cancel the timer |
| 195 | if (_isFinalState(updated.state)) { |
| 196 | printV('Trade ${trade.id} is in final state'); |
| 197 | _cancelSingleTradeTimer(trade.id); |
| 198 | } |
| 199 | } catch (e) { |
| 200 | printV('Error fetching status for ${trade.id}: $e'); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | bool _isFinalState(TradeState state) { |
| 205 | return { |
| 206 | TradeState.completed.raw, |
| 207 | TradeState.success.raw, |
| 208 | TradeState.confirmed.raw, |
| 209 | TradeState.settled.raw, |
| 210 | TradeState.finished.raw, |
| 211 | TradeState.expired.raw, |
| 212 | TradeState.failed.raw, |
| 213 | TradeState.notFound.raw, |
| 214 | }.contains(state.raw); |
| 215 | } |
| 216 | |
| 217 | void _cancelSingleTradeTimer(String tradeId) { |
| 218 | if (_tradeTimers.containsKey(tradeId)) { |
| 219 | _tradeTimers[tradeId]?.cancel(); |
| 220 | _tradeTimers.remove(tradeId); |
| 221 | printV('Trade timer for ${tradeId} cancelled'); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | void _cancelMultipleTradeTimers(List<String> tradeIds) { |
| 226 | for (final tradeId in tradeIds) { |
| 227 | _cancelSingleTradeTimer(tradeId); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /// This is called when the app is brought back to foreground. |
| 232 | void resumeTradeMonitoring() { |
| 233 | if (appStore.wallet != null) { |
| 234 | monitorActiveTrades(appStore.wallet!.id); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /// There's no need to run the trade checks when the app is in background. |
| 239 | /// We only want to update the trade status when the app is in foreground. |
| 240 | /// This helps to reduce the battery usage, network usage and enhance overall privacy. |
| 241 | /// |
| 242 | /// This is called when the app is sent to background or when the app is closed. |
| 243 | void stopTradeMonitoring() { |
| 244 | printV('Stopping trade monitoring'); |
| 245 | _cancelMultipleTradeTimers(_tradeTimers.keys.toList()); |
| 246 | } |
| 247 | } |