aEF33SRq

1public class BitmexClient {
2    private final OkHttpClient client = new OkHttpClient();
3
4    private String api = "";
5    private String secret = "";
6
7    public void setApi(String api, String secret) {
8        this.api = api;
9        this.secret=secret;
10    }
11
12    //API REQUEST BUILDING
13
14    private Response apicall(String verb, String endpoint, String jsonBody) throws NoSuchAlgorithmException, InvalidKeyException, IOException {
15        String expires = String.valueOf(Instant.now().getEpochSecond()+3600);
16        Request.Builder builder = new Request.Builder()
17                .url("https://www.bitmex.com/api/v1"+endpoint)
18                .addHeader("api-expires", expires)
19                .addHeader("api-key", api)
20                .addHeader("api-signature", encodeHexHmacSignature(secret, verb+"/api/v1"+endpoint+expires));
21                /*if (verb.equals("POST")){
22                    builder.post(RequestBody.create(MediaType.get("text/plain; charset=utf-8t"), encodeHexHmacSignature(secret, jsonBody)));
23                } else if (verb.equalsIgnoreCase("PUT")){
24                    builder.put(RequestBody.create(MediaType.get("text/plain; charset=utf-8"), encodeHexHmacSignature(secret, jsonBody)));
25                }*/
26                Request request = builder.build();
27        return client.newCall(request).execute();
28    }
29
30
31    private String encodeHexHmacSignature(String key, String data) throws NoSuchAlgorithmException,UnsupportedEncodingException, InvalidKeyException {
32        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
33        SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
34        sha256_HMAC.init(secret_key);
35        return Hex.encodeHexString(sha256_HMAC.doFinal(data.getBytes("UTF-8")));
36    }
37
38    //TRADING METHODS
39    public void placeOrder(){
40        String data = "{\"symbol\":\"XBTUSD\",\"orderQty\":20,\"ordType\":\"Market}";
41        try {
42            Response r = apicall("POST", "order", data);
43            System.out.println(r.body().string());
44        } catch (NoSuchAlgorithmException | InvalidKeyException | IOException e) {
45            e.printStackTrace();
46        }
47    }
48}