mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-11-16 17:27:39 +00:00
101 lines
2.7 KiB
Dart
101 lines
2.7 KiB
Dart
/*
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* This file is part of Stack Wallet.
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*
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* Copyright (c) 2023 Cypher Stack
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* All Rights Reserved.
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* The code is distributed under GPLv3 license, see LICENSE file for details.
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* Generated by Cypher Stack on 2023-05-26
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*
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*/
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import 'dart:async';
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import 'package:decimal/decimal.dart';
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import 'package:flutter/foundation.dart';
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import 'package:isar/isar.dart';
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import '../db/isar/main_db.dart';
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import '../models/isar/models/isar_models.dart';
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import '../networking/http.dart';
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import 'price.dart';
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import '../app_config.dart';
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import '../wallets/crypto_currency/crypto_currency.dart';
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import 'package:tuple/tuple.dart';
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class PriceService extends ChangeNotifier {
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late final String baseTicker;
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Future<Set<String>> get tokenContractAddressesToCheck async =>
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(await MainDB.instance.getEthContracts().addressProperty().findAll())
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.toSet();
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final Duration updateInterval = const Duration(seconds: 60);
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Timer? _timer;
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final Map<CryptoCurrency, Tuple2<Decimal, double>> _cachedPrices = {
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for (final coin in AppConfig.coins) coin: Tuple2(Decimal.zero, 0.0),
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};
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final Map<String, Tuple2<Decimal, double>> _cachedTokenPrices = {};
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final _priceAPI = PriceAPI(HTTP());
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Tuple2<Decimal, double> getPrice(CryptoCurrency coin) => _cachedPrices[coin]!;
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Tuple2<Decimal, double> getTokenPrice(String contractAddress) =>
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_cachedTokenPrices[contractAddress.toLowerCase()] ??
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Tuple2(Decimal.zero, 0);
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PriceService(this.baseTicker);
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Future<void> updatePrice() async {
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final priceMap =
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await _priceAPI.getPricesAnd24hChange(baseCurrency: baseTicker);
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bool shouldNotify = false;
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for (final map in priceMap.entries) {
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if (_cachedPrices[map.key] != map.value) {
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_cachedPrices[map.key] = map.value;
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shouldNotify = true;
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}
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}
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final _tokenContractAddressesToCheck = await tokenContractAddressesToCheck;
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if (_tokenContractAddressesToCheck.isNotEmpty) {
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final tokenPriceMap = await _priceAPI.getPricesAnd24hChangeForEthTokens(
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contractAddresses: _tokenContractAddressesToCheck,
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baseCurrency: baseTicker,
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);
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for (final map in tokenPriceMap.entries) {
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if (_cachedTokenPrices[map.key] != map.value) {
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_cachedTokenPrices[map.key] = map.value;
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shouldNotify = true;
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}
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}
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}
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if (shouldNotify) {
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notifyListeners();
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}
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}
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void cancel() {
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_timer?.cancel();
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_timer = null;
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}
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void start(bool rightAway) {
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if (rightAway) {
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updatePrice();
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}
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_timer?.cancel();
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_timer = Timer.periodic(updateInterval, (_) {
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updatePrice();
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});
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}
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@override
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void dispose() {
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cancel();
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super.dispose();
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}
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}
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