mirror of
https://github.com/Such-Software/hash-wallet.git
synced 2026-10-17 05:41:29 +02:00
jwinterm
ca771f51d5
Server-side forex (ECB daily reference rates) shipped in hash-wallet-prices; the wallet needed no code change. Comment updated so the file stops claiming USD-only.
73 lines
2.4 KiB
Dart
73 lines
2.4 KiB
Dart
import 'package:cw_core/utils/proxy_wrapper.dart';
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import 'package:cw_core/crypto_currency.dart';
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import 'package:hash_wallet/entities/fiat_currency.dart';
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import 'dart:convert';
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// Hash Bags price endpoint. Backed by the Cloudflare Worker in
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// github.com/Such-Software/hash-wallet-prices: Kraken for majors, Nonlogs +
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// volume-weighted CexSwap for WOW, KV-cached every 60s.
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//
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// Non-USD fiats are converted server-side through ECB daily reference rates
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// (since 2026-08-16). An unknown quote currency returns price=0 and the UI
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// shows the existing "price unavailable" fallback.
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//
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// TODO: add a .onion mirror once we deploy a Tor hidden service and update
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// _fiatApiOnionAuthority — Tor users currently fall back to clearnet.
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const _fiatApiClearNetAuthority = 'prices.neroswap.com';
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const _fiatApiOnionAuthority = '';
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const _fiatApiPath = '/v2/rates';
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Future<double> _fetchPrice(String crypto, String fiat, bool torOnly) async {
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final Map<String, String> queryParams = {
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'base': crypto.split(".").first,
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'quote': fiat,
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};
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num price = 0.0;
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try {
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final clearnetUri = Uri.https(_fiatApiClearNetAuthority, _fiatApiPath, queryParams);
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final onionUri = _fiatApiOnionAuthority.isEmpty
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? clearnetUri
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: Uri.http(_fiatApiOnionAuthority, _fiatApiPath, queryParams);
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final response = await ProxyWrapper().get(
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onionUri: onionUri,
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clearnetUri: torOnly ? onionUri : clearnetUri,
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);
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if (response.statusCode != 200) {
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return 0.0;
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}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final results = responseJSON['results'] as Map<String, dynamic>;
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if (results.isNotEmpty) {
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price = results.values.first as num;
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}
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return price.toDouble();
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} catch (e) {
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return price.toDouble();
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}
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}
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/// Override specific [CryptoCurrency] to fix its price to the price of another
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/// e.g. nDEPS should have the same price as DEPS, but only DEPS is tracked
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CryptoCurrency _overrideCryptoCurrency(CryptoCurrency crypto) {
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if (crypto.title == CryptoCurrency.ndeps.title)
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return CryptoCurrency.deps;
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return crypto;
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}
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class FiatConversionService {
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static Future<double> fetchPrice({
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required CryptoCurrency crypto,
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required FiatCurrency fiat,
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required bool torOnly,
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}) async =>
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await _fetchPrice(_overrideCryptoCurrency(crypto).toString(), fiat.toString(), torOnly);
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}
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