bfx-auth-rest-v2.java

bfx-auth-rest-v2.java

​
import java.util.Date;
​
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
​
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
​
public final class Program {
    static final String baseUrl = "https://api.bitfinex.com";
    static final String apiKey = "";
    static final String apiSecret = "";
​
    public static void main(String[] args) throws Exception {
        OkHttpClient client = new OkHttpClient();
​
        String nonce = Long.toString((new Date().getTime()) * 1000l);
        String apiPath = "v2/auth/r/info/user";
        String body = "{}";
        String signatureRaw = String.format("/api/%s%s%s", apiPath, nonce, body);
        String signature = computeSignature(signatureRaw, apiSecret);
​
        RequestBody reqBody = RequestBody.create(MediaType.parse("application/json"), "{}");
​
        Request req = new Request.Builder().url(baseUrl + "/" + apiPath)
                .addHeader("bfx-nonce", nonce)
                .addHeader("bfx-apikey", apiKey)
                .addHeader("bfx-signature", signature)
                .post(reqBody).build();
​
        Response res = client.newCall(req).execute();
        String result = res.body().string();
        System.out.println(result);
    }
​
    private static String computeSignature(String input, String secret) throws Exception {
        SecretKeySpec signingKey = new SecretKeySpec(secret.getBytes(), "HmacSHA384");
        final Mac mac = Mac.getInstance("HmacSHA384");
        mac.init(signingKey);
​
        byte[] digest = mac.doFinal(input.getBytes());
        StringBuffer sb = new StringBuffer();
        for (byte b : digest) {
            String hex = Integer.toHexString(0xff & b);
            if (hex.length() == 1)
                sb.append('0');
            sb.append(hex);
        }
        return sb.toString();
    }