stack_wallet/lib/services/exchange/simpleswap/simpleswap_exchange.dart

import 'package:decimal/decimal.dart';
import 'package:stackwallet/models/exchange/response_objects/currency.dart';
import 'package:stackwallet/models/exchange/response_objects/pair.dart';
import 'package:stackwallet/models/exchange/response_objects/range.dart';
import 'package:stackwallet/models/exchange/response_objects/trade.dart';
import 'package:stackwallet/services/exchange/exchange.dart';
import 'package:stackwallet/services/exchange/exchange_response.dart';
import 'package:stackwallet/services/exchange/simpleswap/simpleswap_api.dart';

class SimpleSwapExchange extends Exchange {
  @override
  Future<ExchangeResponse<Trade>> createTrade({
    required String from,
    required String to,
    required bool fixedRate,
    required Decimal amount,
    required String addressTo,
    required String addressRefund,
    required String refundExtraId,
  }) async {
    return await SimpleSwapAPI.instance.createNewExchange(
      isFixedRate: fixedRate,
      currencyFrom: from,
      currencyTo: to,
      addressTo: addressTo,
      userRefundAddress: addressRefund,
      userRefundExtraId: refundExtraId,
      amount: amount.toString(),
    );
  }

  @override
  Future<ExchangeResponse<List<Currency>>> getAllCurrencies(
    bool fixedRate,
  ) async {
    final response =
        await SimpleSwapAPI.instance.getAllCurrencies(fixedRate: fixedRate);
    if (response.value != null) {
      final List<Currency> currencies = response.value!
          .map((e) => Currency(
                ticker: e.symbol,
                name: e.name,
                network: e.network,
                image: e.image,
                hasExternalId: e.hasExtraId,
                externalId: e.extraId,
                isFiat: false,
                featured: false,
                isStable: false,
                supportsFixedRate: fixedRate,
              ))
          .toList();
      return ExchangeResponse<List<Currency>>(
        value: currencies,
        exception: response.exception,
      );
    }

    return ExchangeResponse<List<Currency>>(
      value: null,
      exception: response.exception,
    );
  }

  @override
  Future<ExchangeResponse<List<Pair>>> getAllPairs(bool fixedRate) async {
    return await SimpleSwapAPI.instance.getAllPairs(isFixedRate: fixedRate);
  }

  @override
  Future<ExchangeResponse<Decimal>> getEstimate(
    String from,
    String to,
    Decimal amount,
    bool fixedRate,
  ) async {
    final response = await SimpleSwapAPI.instance.getEstimated(
      isFixedRate: fixedRate,
      currencyFrom: from,
      currencyTo: to,
      amount: amount.toString(),
    );

    return ExchangeResponse(
      value: Decimal.tryParse(response.value ?? ""),
      exception: response.exception,
    );
  }

  @override
  Future<ExchangeResponse<Range>> getMinMaxExchangeAmounts(
    String from,
    String to,
    bool fixedRate,
  ) async {
    return await SimpleSwapAPI.instance.getRange(
      isFixedRate: fixedRate,
      currencyFrom: from,
      currencyTo: to,
    );
  }

  @override
  Future<ExchangeResponse<List<Pair>>> getPairsFor(
    String currency,
    bool fixedRate,
  ) async {
    // return await SimpleSwapAPI.instance.ge
    throw UnimplementedError();
  }

  @override
  Future<ExchangeResponse<Trade>> getTrade(String tradeId) async {
    return await SimpleSwapAPI.instance.getExchange(exchangeId: tradeId);
  }

  @override
  Future<ExchangeResponse<List<Trade>>> getTrades() async {
    // TODO: implement getTrades
    throw UnimplementedError();
  }
}