J'essaie de me connecter à l'API de négociation Poloniex, documentée ici: https://poloniex.com/support/api/.Connexion à l'API de négociation (Poloniex) avec clé API et secret
Fondamentalement, il décrit tout ce qu'il faut savoir:
All calls to the trading API are sent via HTTP POST to https://poloniex.com/tradingApi and must contain the following headers:
Key - Your API key.
Sign - The query's POST data signed by your key's "secret" according to the HMAC-SHA512 method.
Additionally, all queries must include a "nonce" POST parameter. The nonce parameter is an integer which must always be greater than the previous nonce used.
Mais pour une raison quelconque, j'obtiens l'erreur: commande non valide. J'ai essayé différentes commandes, mais aucune n'a fonctionné.
public static String POLONIEX_SECRET_KEY = "my secret"; //KEY
public static String POLONIEX_API_KEY = "my key"; // TODO API KEY
public static void main(String[] args) {
try {
accessPoloniex();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static final long generateNonce(){
Date d = new Date();
return d.getTime();
}
public static final void accessPoloniex() throws IOException{
String nonce = new BigDecimal(Polo2.generateNonce()).toString();
String connectionString = "https://poloniex.com/tradingApi";
String queryArgs = "command=returnBalances";
String hmac512 = hmac512Digest(queryArgs, POLONIEX_SECRET_KEY);
// Produce the output
ByteArrayOutputStream out = new ByteArrayOutputStream();
Writer writer = new OutputStreamWriter(out, "UTF-8");
writer.append(queryArgs);
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost post = new HttpPost(connectionString);
post.setHeader("Key", POLONIEX_API_KEY);
post.setHeader("Sign", hmac512);
post.setEntity(new ByteArrayEntity(out.toByteArray()));
List<NameValuePair> params = new ArrayList<>();
params.add(new BasicNameValuePair("nonce", nonce));
CloseableHttpResponse response = null;
Scanner in = null;
try
{
post.setEntity(new UrlEncodedFormEntity(params));
response = httpClient.execute(post);
// System.out.println(response.getStatusLine());
HttpEntity entity = response.getEntity();
in = new Scanner(entity.getContent());
while (in.hasNext())
{
System.out.println(in.next());
}
EntityUtils.consume(entity);
} finally
{
in.close();
response.close();
}
}
public static String hmac512Digest(String msg, String keyString) {
Mac shaMac;
try {
shaMac = Mac.getInstance("HmacSHA512");
SecretKeySpec keySpec = new SecretKeySpec(keyString.getBytes(), "HmacSHA512");
shaMac.init(keySpec);
final byte[] macData = shaMac.doFinal(msg.getBytes());
return Hex.encodeHexString(macData); //again with try/catch for InvalidKeyException
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return null;
}
Est-ce que quelqu'un voit un problème dans ce code?