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It is common practice to have some kind of logging to be able to debug the communication. This will require to introduce a logging interceptor right after the actually used AuthenticationInterceptor. However in order to not close the underlying buffers, it is good to upgrade retrofit2 version (currently 2.9.0), so that response.body().source().peek() function will be introduced in class RealBufferedSource. This function allows to clone the source and that way preserve the source for later use yet be able to log the response body at the same time.

Although I applied the solution, Kucoin/kucoin-java-sdk#41, while socket running gets the exception below. The socket can work for a maximum of 1 day without any errors. Are there any ways to solve this problem or auto reconnect again when the exception occurs?

2021-05-29 03:14:24.151 ERROR 13061 --- [.kucoin.com/...] k.f.c.w.l.KucoinFuturesWebsocketListener : Error on private socket

javax.net.ssl.SSLException: Connection reset
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:127) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:349) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:292) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:287) ~[na:na]
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:144) ~[na:na]
at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1421) ~[na:na]
at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1386) ~[na:na]
at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:973) ~[na:na]
at okio.Okio$2.read(Okio.java:140) ~[okio-1.17.2.jar!/:na]
at okio.AsyncTimeout$2.read(AsyncTimeout.java:237) ~[okio-1.17.2.jar!/:na]
at okio.RealBufferedSource.request(RealBufferedSource.java:72) ~[okio-1.17.2.jar!/:na]
at okio.RealBufferedSource.require(RealBufferedSource.java:65) ~[okio-1.17.2.jar!/:na]
at okio.RealBufferedSource.readByte(RealBufferedSource.java:78) ~[okio-1.17.2.jar!/:na]
at okhttp3.internal.ws.WebSocketReader.readHeader(WebSocketReader.java:117) ~[okhttp-3.14.9.jar!/:na]
at okhttp3.internal.ws.WebSocketReader.processNextFrame(WebSocketReader.java:101) ~[okhttp-3.14.9.jar!/:na]
at okhttp3.internal.ws.RealWebSocket.loopReader(RealWebSocket.java:273) ~[okhttp-3.14.9.jar!/:na]
at okhttp3.internal.ws.RealWebSocket$1.onResponse(RealWebSocket.java:209) ~[okhttp-3.14.9.jar!/:na]
at okhttp3.RealCall$AsyncCall.execute(RealCall.java:174) ~[okhttp-3.14.9.jar!/:na]
at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) ~[okhttp-3.14.9.jar!/:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
Suppressed: java.net.SocketException: Broken pipe (Write failed)
at java.base/java.net.SocketOutputStream.socketWrite0(Native Method) ~[na:na]
at java.base/java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:110) ~[na:na]
at java.base/java.net.SocketOutputStream.write(SocketOutputStream.java:150) ~[na:na]
at java.base/sun.security.ssl.SSLSocketOutputRecord.encodeAlert(SSLSocketOutputRecord.java:81) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:380) ~[na:na]
... 20 common frames omitted
Caused by: java.net.SocketException: Connection reset
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:186) ~[na:na]
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140) ~[na:na]
at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:478) ~[na:na]
at java.base/sun.security.ssl.SSLSocketInputRecord.readFully(SSLSocketInputRecord.java:461) ~[na:na]
at java.base/sun.security.ssl.SSLSocketInputRecord.decodeInputRecord(SSLSocketInputRecord.java:243) ~[na:na]
at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:181) ~[na:na]
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:110) ~[na:na]
... 17 common frames omitted

how to use OCO in Futures api ?

Hi,

I encouter an issue when i call two times with different set of API KEY plug on 2 different account.
After some analyse, I found a not thread safe code in class com.kucoin.sdk.factory.RetrofitFactory.

The same instance will be return when an instance as already been generated.

The fix could be :

public class RetrofitFactory {

    private static final Converter.Factory CONVERTER_FACTORY = JacksonConverterFactory.create(KucoinObjectMapper.INSTANCE);

    public static Retrofit getPublicRetorfit(String baseUrl) {

        return new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(CONVERTER_FACTORY)
                .client(HttpClientFactory.getPublicClient())
                .build();

    }

    public static Retrofit getAuthRetorfit(String baseUrl, String apiKey, String secret, String passPhrase, Integer apiKeyVersion) {

        return new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(CONVERTER_FACTORY)
                .client(HttpClientFactory.getAuthClient(apiKey, secret, passPhrase, apiKeyVersion))
                .build();

    }
}

In request to GET /api/v1/transaction-history you should be able to define parameter "forward", yet this is currently not true in the sdk.

Hot to add new Order with TP and SP in one request by java api in futures ??