cake_wallet/lib/reactions/on_current_fiat_api_mode_change.dart

import 'package:cake_wallet/entities/fiat_api_mode.dart';
import 'package:cake_wallet/entities/transaction_description.dart';
import 'package:hive/hive.dart';
import 'package:mobx/mobx.dart';
import 'package:cake_wallet/core/fiat_conversion_service.dart';
import 'package:cake_wallet/store/dashboard/fiat_conversion_store.dart';
import 'package:cake_wallet/store/settings_store.dart';
import 'package:cake_wallet/store/app_store.dart';

import 'fiat_historical_rate_update.dart';

ReactionDisposer? _onCurrentFiatCurrencyChangeDisposer;
ReactionDisposer? _onHistoricalRateUpdateDisposer;

void startCurrentFiatApiModeChangeReaction(AppStore appStore, SettingsStore settingsStore,
    FiatConversionStore fiatConversionStore, Box<TransactionDescription> transactionDescription) {
  _onCurrentFiatCurrencyChangeDisposer?.reaction.dispose();
  _onCurrentFiatCurrencyChangeDisposer =
      reaction((_) => settingsStore.fiatApiMode, (FiatApiMode fiatApiMode) async {
    if (appStore.wallet == null || fiatApiMode == FiatApiMode.disabled) {
      return;
    }

    fiatConversionStore.prices[appStore.wallet!.currency] = await FiatConversionService.fetchPrice(
        crypto: appStore.wallet!.currency,
        fiat: settingsStore.fiatCurrency,
        torOnly: fiatApiMode == FiatApiMode.torOnly);

    if (settingsStore.showHistoricalFiatAmount) {
      await historicalRateUpdate(
          appStore.wallet!, settingsStore, fiatConversionStore, transactionDescription);
    }
  });
}

void startHistoricalRateUpdateReaction(AppStore appStore, SettingsStore settingsStore,
    FiatConversionStore fiatConversionStore, Box<TransactionDescription> transactionDescription) {
  _onHistoricalRateUpdateDisposer?.reaction.dispose();
  _onHistoricalRateUpdateDisposer = reaction((_) => settingsStore.showHistoricalFiatAmount,
      (bool showHistoricalFiatAmount) async {
    if (appStore.wallet == null || settingsStore.fiatApiMode == FiatApiMode.disabled || !showHistoricalFiatAmount) {
      return;
    }

    await historicalRateUpdate(
        appStore.wallet!, settingsStore, fiatConversionStore, transactionDescription);
  });
}