package org.knowm.xchange.poloniex.service; import java.math.BigInteger; import javax.crypto.Mac; import org.knowm.xchange.service.BaseParamsDigest; import si.mazi.rescu.RestInvocation; public class PoloniexDigest extends BaseParamsDigest { /** * Constructor * * @param secretKeyBase64 * @throws IllegalArgumentException if key is invalid (cannot be base-64-decoded or the decoded key is invalid). */ private PoloniexDigest(String secretKeyBase64) { super(secretKeyBase64, HMAC_SHA_512); } public static PoloniexDigest createInstance(String secretKeyBase64) { return secretKeyBase64 == null ? null : new PoloniexDigest(secretKeyBase64); } @Override public String digestParams(RestInvocation restInvocation) { String postBody = restInvocation.getRequestBody(); Mac mac = getMac(); mac.update(postBody.getBytes()); return String.format("%0128x", new BigInteger(1, mac.doFinal())); } }