cake_wallet/lib/core/fiat_conversion_service.dart

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import 'package:cake_wallet/entities/crypto_currency.dart';
import 'package:cake_wallet/entities/fiat_currency.dart';
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import 'dart:convert';
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import 'package:flutter/foundation.dart';
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import 'package:http/http.dart';
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import 'package:cake_wallet/entities/currency_formatter.dart';
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const fiatApiAuthority = 'fiat-api.cakewallet.com';
const fiatApiPath = '/v1/rates';
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Future<double> _fetchPrice(Map<String, dynamic> args) async {
final crypto = args['crypto'] as CryptoCurrency;
final fiat = args['fiat'] as FiatCurrency;
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double price = 0.0;
try {
final fiatStringified = fiat.toString();
final uri =
Uri.https(fiatApiAuthority, fiatApiPath,
<String, String> {'convert': fiatStringified});
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final response = await get(uri.toString());
if (response.statusCode != 200) {
return 0.0;
}
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final responseJSON = json.decode(response.body) as Map<String, dynamic>;
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final data = responseJSON['data'] as List<dynamic>;
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for (final item in data) {
if (item['symbol'] == cryptoToString(crypto)) {
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price = item['quote'][fiatStringified]['price'] as double;
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break;
}
}
return price;
} catch (e) {
return price;
}
}
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Future<double> _fetchPriceAsync(
CryptoCurrency crypto, FiatCurrency fiat) async =>
compute(_fetchPrice, {'fiat': fiat, 'crypto': crypto});
class FiatConversionService {
static Future<double> fetchPrice(CryptoCurrency crypto, FiatCurrency fiat) async =>
await _fetchPriceAsync(crypto, fiat);
}