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Java implementation for Binance API

There is a newer version: 1.0.6

package com.binance.api.client.impl;

import com.binance.api.client.BinanceApiCallback;
import com.binance.api.client.BinanceApiError;
import com.binance.api.client.exception.BinanceApiException;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

import java.io.IOException;

import static com.binance.api.client.impl.BinanceApiServiceGenerator.getBinanceApiError;

/**
 * An adapter/wrapper which transforms a Callback from Retrofit into a BinanceApiCallback which is exposed to the client.
 */
public class BinanceApiCallbackAdapter implements Callback {

  private final BinanceApiCallback callback;

  public BinanceApiCallbackAdapter(BinanceApiCallback callback) {
    this.callback = callback;
  }

  public void onResponse(Call call, Response response) {
    if (response.isSuccessful()) {
      callback.onResponse(response.body());
    } else {
      if (response.code() == 504) {
        // HTTP 504 return code is used when the API successfully sent the message but not get a response within the timeout period.
        // It is important to NOT treat this as a failure; the execution status is UNKNOWN and could have been a success.
        return;
      }
      try {
        BinanceApiError apiError = getBinanceApiError(response);
        onFailure(call, new BinanceApiException(apiError));
      } catch (IOException e) {
        onFailure(call, new BinanceApiException(e));
      }
    }
  }

  @Override
  public void onFailure(Call call, Throwable throwable) {
    if (throwable instanceof BinanceApiException) {
      callback.onFailure(throwable);
    } else {
      callback.onFailure(new BinanceApiException(throwable));
    }
  }
}