mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-11-17 17:57:40 +00:00
367 lines
12 KiB
Dart
367 lines
12 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:decimal/decimal.dart';
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import 'package:http/http.dart' as http;
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import 'package:stackwallet/models/buy/response_objects/crypto.dart';
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import 'package:stackwallet/models/buy/response_objects/fiat.dart';
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import 'package:stackwallet/models/buy/response_objects/order.dart';
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import 'package:stackwallet/models/buy/response_objects/quote.dart';
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import 'package:stackwallet/services/buy/buy_response.dart';
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import 'package:stackwallet/utilities/enums/coin_enum.dart';
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import 'package:stackwallet/utilities/enums/fiat_enum.dart';
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import 'package:stackwallet/utilities/logger.dart';
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import 'package:stackwallet/utilities/prefs.dart';
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import 'package:url_launcher/url_launcher.dart';
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class SimplexAPI {
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static const String authority = "buycrypto.stackwallet.com";
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// static const String authority = "localhost"; // For development purposes
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static const String scheme = authority == "localhost" ? "http" : "https";
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final _prefs = Prefs.instance;
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SimplexAPI._();
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static final SimplexAPI _instance = SimplexAPI._();
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static SimplexAPI get instance => _instance;
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/// set this to override using standard http client. Useful for testing
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http.Client? client;
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Uri _buildUri(String path, Map<String, String>? params) {
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if (scheme == "http") {
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return Uri.http(authority, path, params);
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}
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return Uri.https(authority, path, params);
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}
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Future<BuyResponse<List<Crypto>>> getSupportedCryptos() async {
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try {
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Map<String, String> headers = {
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'Content-Type': 'application/x-www-form-urlencoded',
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};
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Map<String, String> data = {
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'ROUTE': 'supported_cryptos',
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};
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Uri url = _buildUri('api.php', data);
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var res = await http.post(url, headers: headers);
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if (res.statusCode != 200) {
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throw Exception(
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'getAvailableCurrencies exception: statusCode= ${res.statusCode}');
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}
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final jsonArray = jsonDecode(res.body); // TODO handle if invalid json
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return _parseSupportedCryptos(jsonArray);
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} catch (e, s) {
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Logging.instance.log("getAvailableCurrencies exception: $e\n$s",
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level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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BuyResponse<List<Crypto>> _parseSupportedCryptos(dynamic jsonArray) {
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try {
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List<Crypto> cryptos = [];
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List<Fiat> fiats = [];
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for (final crypto in jsonArray as List) {
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// TODO validate jsonArray
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if (isStackCoin("${crypto['ticker_symbol']}")) {
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cryptos.add(Crypto.fromJson({
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'ticker': "${crypto['ticker_symbol']}",
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'name': crypto['name'],
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'network': "${crypto['network']}",
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'contractAddress': "${crypto['contractAddress']}",
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'image': "",
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}));
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}
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}
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return BuyResponse(value: cryptos);
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} catch (e, s) {
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Logging.instance
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.log("_parseSupported exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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Future<BuyResponse<List<Fiat>>> getSupportedFiats() async {
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try {
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Map<String, String> headers = {
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'Content-Type': 'application/x-www-form-urlencoded',
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};
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Map<String, String> data = {
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'ROUTE': 'supported_fiats',
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};
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Uri url = _buildUri('api.php', data);
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var res = await http.post(url, headers: headers);
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if (res.statusCode != 200) {
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throw Exception(
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'getAvailableCurrencies exception: statusCode= ${res.statusCode}');
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}
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final jsonArray = jsonDecode(res.body); // TODO validate json
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return _parseSupportedFiats(jsonArray);
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} catch (e, s) {
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Logging.instance.log("getAvailableCurrencies exception: $e\n$s",
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level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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BuyResponse<List<Fiat>> _parseSupportedFiats(dynamic jsonArray) {
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try {
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List<Crypto> cryptos = [];
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List<Fiat> fiats = [];
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for (final fiat in jsonArray as List) {
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if (isSimplexFiat("${fiat['ticker_symbol']}")) {
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// TODO validate list
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fiats.add(Fiat.fromJson({
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'ticker': "${fiat['ticker_symbol']}",
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'name': fiatFromTickerCaseInsensitive("${fiat['ticker_symbol']}")
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.prettyName,
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'minAmount': "${fiat['min_amount']}",
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'maxAmount': "${fiat['max_amount']}",
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'image': "",
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}));
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} // TODO handle else
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}
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return BuyResponse(value: fiats);
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} catch (e, s) {
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Logging.instance
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.log("_parseSupported exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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Future<BuyResponse<SimplexQuote>> getQuote(SimplexQuote quote) async {
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try {
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await _prefs.init();
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String? userID = _prefs.userID;
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Map<String, String> headers = {
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'Content-Type': 'application/x-www-form-urlencoded',
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};
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Map<String, String> data = {
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'ROUTE': 'quote',
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'CRYPTO_TICKER': quote.crypto.ticker.toUpperCase(),
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'FIAT_TICKER': quote.fiat.ticker.toUpperCase(),
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'REQUESTED_TICKER': quote.buyWithFiat
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? quote.fiat.ticker.toUpperCase()
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: quote.crypto.ticker.toUpperCase(),
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'REQUESTED_AMOUNT': quote.buyWithFiat
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? "${quote.youPayFiatPrice}"
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: "${quote.youReceiveCryptoAmount}",
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};
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if (userID != null) {
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data['USER_ID'] = userID;
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}
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Uri url = _buildUri('api.php', data);
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var res = await http.get(url, headers: headers);
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if (res.statusCode != 200) {
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throw Exception('getQuote exception: statusCode= ${res.statusCode}');
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}
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final jsonArray = jsonDecode(res.body);
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if (jsonArray.containsKey('error') as bool) {
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if (jsonArray['error'] == true || jsonArray['error'] == 'true') {
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// jsonArray['error'] as bool == true?
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throw Exception('getQuote exception: ${jsonArray['error']}');
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}
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}
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jsonArray['quote'] = quote; // Add and pass this on
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return _parseQuote(jsonArray);
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} catch (e, s) {
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Logging.instance.log("getQuote exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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BuyResponse<SimplexQuote> _parseQuote(dynamic jsonArray) {
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try {
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// final Map<String, dynamic> lol =
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// Map<String, dynamic>.from(jsonArray as Map);
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double? cryptoAmount = jsonArray['digital_money']?['amount'] as double?;
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if (cryptoAmount == null) {
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String error = jsonArray['error'] as String;
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return BuyResponse(
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exception: BuyException(
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error,
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BuyExceptionType.cryptoAmountOutOfRange,
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),
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);
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}
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SimplexQuote quote = jsonArray['quote'] as SimplexQuote;
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final SimplexQuote _quote = SimplexQuote(
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crypto: quote.crypto,
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fiat: quote.fiat,
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youPayFiatPrice: quote.buyWithFiat
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? quote.youPayFiatPrice
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: Decimal.parse("${jsonArray['fiat_money']['base_amount']}"),
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youReceiveCryptoAmount:
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Decimal.parse("${jsonArray['digital_money']['amount']}"),
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id: jsonArray['quote_id'] as String,
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receivingAddress: quote.receivingAddress,
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buyWithFiat: quote.buyWithFiat,
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);
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return BuyResponse(value: _quote);
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} catch (e, s) {
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Logging.instance
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.log("_parseQuote exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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Future<BuyResponse<SimplexOrder>> newOrder(SimplexQuote quote) async {
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// Calling Simplex's API manually:
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// curl --request POST \
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// --url https://sandbox.test-simplexcc.com/wallet/merchant/v2/payments/partner/data \
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// --header 'Authorization: ApiKey $apiKey' \
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// --header 'accept: application/json' \
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// --header 'content-type: application/json' \
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// -d '{"account_details": {"app_provider_id": "$publicKey", "app_version_id": "123", "app_end_user_id": "01e7a0b9-8dfc-4988-a28d-84a34e5f0a63", "signup_login": {"timestamp": "1994-11-05T08:15:30-05:00", "ip": "207.66.86.226"}}, "transaction_details": {"payment_details": {"quote_id": "3b58f4b4-ed6f-447c-b96a-ffe97d7b6803", "payment_id": "baaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa", "order_id": "789", "original_http_ref_url": "https://stackwallet.com/simplex", "destination_wallet": {"currency": "BTC", "address": "bc1qjvj9ca8gdsv3g58yrzrk6jycvgnjh9uj35rja2"}}}}'
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try {
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await _prefs.init();
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String? userID = _prefs.userID;
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int? signupEpoch = _prefs.signupEpoch;
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Map<String, String> headers = {
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'Content-Type': 'application/x-www-form-urlencoded',
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};
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Map<String, String> data = {
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'ROUTE': 'order',
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'QUOTE_ID': quote.id,
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'ADDRESS': quote.receivingAddress,
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'CRYPTO_TICKER': quote.crypto.ticker.toUpperCase(),
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};
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if (userID != null) {
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data['USER_ID'] = userID;
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}
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if (signupEpoch != null && signupEpoch != 0) {
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DateTime date = DateTime.fromMillisecondsSinceEpoch(signupEpoch * 1000);
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data['SIGNUP_TIMESTAMP'] =
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date.toIso8601String() + timeZoneFormatter(date.timeZoneOffset);
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}
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Uri url = _buildUri('api.php', data);
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var res = await http.get(url, headers: headers);
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if (res.statusCode != 200) {
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throw Exception('newOrder exception: statusCode= ${res.statusCode}');
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}
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final jsonArray = jsonDecode(res.body); // TODO check if valid json
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if (jsonArray.containsKey('error') as bool) {
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if (jsonArray['error'] == true || jsonArray['error'] == 'true') {
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throw Exception(jsonArray['message']);
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}
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}
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SimplexOrder _order = SimplexOrder(
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quote: quote,
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paymentId: "${jsonArray['paymentId']}",
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orderId: "${jsonArray['orderId']}",
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userId: "${jsonArray['userId']}",
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);
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return BuyResponse(value: _order);
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} catch (e, s) {
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Logging.instance.log("newOrder exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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),
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);
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}
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}
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Future<BuyResponse<bool>> redirect(SimplexOrder order) async {
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try {
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Map<String, String> headers = {
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'Content-Type': 'application/x-www-form-urlencoded',
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};
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Map<String, String> data = {
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'ROUTE': 'redirect',
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'PAYMENT_ID': order.paymentId,
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};
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Uri url = _buildUri('api.php', data);
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bool status = await launchUrl(
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url,
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mode: LaunchMode.externalApplication,
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);
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return BuyResponse(value: status);
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} catch (e, s) {
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Logging.instance.log("newOrder exception: $e\n$s", level: LogLevel.Error);
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return BuyResponse(
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exception: BuyException(
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e.toString(),
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BuyExceptionType.generic,
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));
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}
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}
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bool isSimplexFiat(String ticker) {
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try {
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fiatFromTickerCaseInsensitive(ticker);
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return true;
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} on ArgumentError catch (_) {
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return false;
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}
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}
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// See https://github.com/dart-lang/sdk/issues/43391#issuecomment-1229656422
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String timeZoneFormatter(Duration offset) =>
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"${offset.isNegative ? "-" : "+"}${offset.inHours.abs().toString().padLeft(2, "0")}:${(offset.inMinutes - offset.inHours * 60).abs().toString().padLeft(2, "0")}";
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}
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bool isStackCoin(String? ticker) {
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if (ticker == null) return false;
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try {
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coinFromTickerCaseInsensitive(ticker);
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return true;
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} on ArgumentError catch (_) {
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return false;
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}
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}
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