org.knowm.xchange.livecoin.LivecoinDigest Maven / Gradle / Ivy
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A convenient way to buy and sell Bitcoin
package org.knowm.xchange.livecoin;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Map;
import java.util.TreeMap;
import javax.crypto.Mac;
import javax.ws.rs.FormParam;
import javax.ws.rs.QueryParam;
import org.knowm.xchange.service.BaseParamsDigest;
import si.mazi.rescu.Params;
import si.mazi.rescu.RestInvocation;
public class LivecoinDigest extends BaseParamsDigest {
private LivecoinDigest(String secretKeyBase64) throws UnsupportedEncodingException {
super(secretKeyBase64.getBytes(StandardCharsets.UTF_8), HMAC_SHA_256);
}
public static LivecoinDigest createInstance(String secretKeyBase64, String apiKey) {
try {
return secretKeyBase64 == null ? null : new LivecoinDigest(secretKeyBase64);
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException("Should not happen", e);
}
}
private static String buildQueryString(Map args) {
try {
StringBuilder result = new StringBuilder();
for (String hashKey : args.keySet()) {
if (result.length() > 0) result.append('&');
result.append(hashKey).append("=").append(URLEncoder.encode(args.get(hashKey), "UTF-8"));
}
return result.toString();
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException("Should not happen", e);
}
}
@Override
public String digestParams(RestInvocation restInvocation) {
Params params;
if (restInvocation.getHttpMethod().equals("GET"))
params = restInvocation.getParamsMap().get(QueryParam.class);
else params = restInvocation.getParamsMap().get(FormParam.class);
Map sorted = new TreeMap<>(params.asHttpHeaders());
String queryString = buildQueryString(sorted);
Mac mac = getMac();
mac.update(queryString.getBytes(StandardCharsets.UTF_8));
return String.format("%064x", new BigInteger(1, mac.doFinal())).toUpperCase();
}
}
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