org.knowm.xchange.kucoin.KucoinBaseService Maven / Gradle / Ivy

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XChange implementation for the Kucoin Exchange
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package org.knowm.xchange.kucoin;

import com.google.common.base.Strings;
import java.util.Base64;
import org.apache.commons.codec.digest.HmacAlgorithms;
import org.apache.commons.codec.digest.HmacUtils;
import org.knowm.xchange.client.ExchangeRestProxyBuilder;
import org.knowm.xchange.client.ResilienceRegistries;
import org.knowm.xchange.kucoin.service.AccountAPI;
import org.knowm.xchange.kucoin.service.DepositAPI;
import org.knowm.xchange.kucoin.service.FillAPI;
import org.knowm.xchange.kucoin.service.HistOrdersAPI;
import org.knowm.xchange.kucoin.service.HistoryAPI;
import org.knowm.xchange.kucoin.service.KucoinApiException;
import org.knowm.xchange.kucoin.service.KucoinDigest;
import org.knowm.xchange.kucoin.service.LimitOrderAPI;
import org.knowm.xchange.kucoin.service.OrderAPI;
import org.knowm.xchange.kucoin.service.OrderBookAPI;
import org.knowm.xchange.kucoin.service.OrderCancelByClientOrderIdAPI;
import org.knowm.xchange.kucoin.service.SymbolAPI;
import org.knowm.xchange.kucoin.service.TradingFeeAPI;
import org.knowm.xchange.kucoin.service.WebsocketAPI;
import org.knowm.xchange.kucoin.service.WithdrawalAPI;
import org.knowm.xchange.service.BaseResilientExchangeService;
import si.mazi.rescu.SynchronizedValueFactory;

public class KucoinBaseService extends BaseResilientExchangeService {

  private static final String KEY_VERSION_V2 = "2";
  protected final SymbolAPI symbolApi;
  protected final OrderBookAPI orderBookApi;
  protected final HistoryAPI historyApi;
  protected final AccountAPI accountApi;
  protected final WithdrawalAPI withdrawalAPI;
  protected final DepositAPI depositAPI;
  protected final OrderAPI orderApi;
  protected final OrderCancelByClientOrderIdAPI orderCancelByClientOrderIdAPI;
  protected final LimitOrderAPI limitOrderAPI;
  protected final FillAPI fillApi;
  protected final HistOrdersAPI histOrdersApi;
  protected final WebsocketAPI websocketAPI;
  protected final TradingFeeAPI tradingFeeAPI;

  protected KucoinDigest digest;
  protected String apiKey;
  protected String passphrase;
  protected String apiKeyVersion = KEY_VERSION_V2;
  protected String originalPassphrase;
  protected SynchronizedValueFactory nonceFactory;

  protected KucoinBaseService(KucoinExchange exchange, ResilienceRegistries resilienceRegistries) {
    super(exchange, resilienceRegistries);
    this.symbolApi = service(exchange, SymbolAPI.class);
    this.orderBookApi = service(exchange, OrderBookAPI.class);
    this.historyApi = service(exchange, HistoryAPI.class);
    this.accountApi = service(exchange, AccountAPI.class);
    this.withdrawalAPI = service(exchange, WithdrawalAPI.class);
    this.depositAPI = service(exchange, DepositAPI.class);
    this.orderApi = service(exchange, OrderAPI.class);
    this.orderCancelByClientOrderIdAPI = service(exchange, OrderCancelByClientOrderIdAPI.class);
    this.limitOrderAPI = service(exchange, LimitOrderAPI.class);
    this.fillApi = service(exchange, FillAPI.class);
    this.histOrdersApi = service(exchange, HistOrdersAPI.class);
    this.websocketAPI = service(exchange, WebsocketAPI.class);

    String secretKey = exchange.getExchangeSpecification().getSecretKey();
    this.digest = KucoinDigest.createInstance(secretKey);
    this.apiKey = exchange.getExchangeSpecification().getApiKey();
    this.originalPassphrase =
        (String)
            exchange.getExchangeSpecification().getExchangeSpecificParametersItem("passphrase");
    this.passphrase = KEY_VERSION_V2.equals(this.apiKeyVersion) ?
        Base64.getEncoder().encodeToString(new HmacUtils(HmacAlgorithms.HMAC_SHA_256, secretKey)
            .hmac(this.originalPassphrase))
        : this.originalPassphrase;
    this.nonceFactory = exchange.getNonceFactory();

    this.tradingFeeAPI = service(exchange, TradingFeeAPI.class);
  }

  private  T service(KucoinExchange exchange, Class clazz) {
    return ExchangeRestProxyBuilder.forInterface(clazz, exchange.getExchangeSpecification())
        .build();
  }

  protected void checkAuthenticated() {
    if (Strings.isNullOrEmpty(this.apiKey)) {
      throw new KucoinApiException("Missing API key");
    }
    if (this.digest == null) {
      throw new KucoinApiException("Missing secret key");
    }
    if (Strings.isNullOrEmpty(this.passphrase)) {
      throw new KucoinApiException("Missing passphrase");
    }
  }
}