Example 1: As a query string

queryString: symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

HMAC SHA256 signature:

[linux]$ echo -n “symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559” | openssl dgst -sha256 -hmac “NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j” (stdin)= c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71

Ele precisa adicionar um parâmetro de timestamp, e depois assinar toda a querystring. Eu tentei. var querystr = “asset=abc&amount=100&address=abc&timestamp=abc”; var sig = HMAC ((‘sha256’, ‘hex’, querystr, secretkey);// O segundo parâmetro foi tentado exchange.IO ((“api”, “POST”, “/wapi/v3/withdraw.html”, querystr+“&signature=”+sig); ou exchange.IO(“api”, “POST”, “/wapi/v3/withdraw.html”,querystr); Compreendo. {“msg”:“{“code”:-1105,“msg”:“Parameter ‘payload’ was was empty.”}“,“success”:false}

exchange.IO(“api”, “POST”, “/wapi/v3/withdraw.html?”+querystr+“&signature=”+sig,“”);//ru Eu recebo. {“msg”:“{“code”:-1100,“msg”:“Illegal characters found in parameter ‘signature’; legal range is ‘^[A-Fa-f0-9]{64}$’.”}“,“success”:false}

Se não tiver uma assinatura {“msg”:“{“code”:-1022,“msg”:“Signature for this request is not valid.”}“,“success”:false}