Xtykutl

I'm trying to make a post request to Bitmex API with JS and PHP.

Here's what I did:

Javascript:

var post_data = {"symbol" : symbol, "side": side, "simpleOrderQty" : qty, "ordType" : ordType};

var path = '/api/v1/order';

var expire = Math.round((new Date()).getTime() / 1000) + 10;

var message = "POST" + path+ expire.toString() + data;

var secret = CryptoJS.HmacSHA256(message, secret).toString(CryptoJS.enc.Hex); // this is the secret that I will use in my php code

//hash from this string: POST/api/v1/order1541770067{"symbol":"XBTUSD","side":"Buy","simpleOrderQty":5,"ordType":"Market"} which looks like their example

However when I use curl PHP if I set the post field to this:

{"symbol":"XBTUSD","side":"Buy","simpleOrderQty":5,"ordType":"Market"} // as a string

it gives me a "symbol" is a required parameter, which I assume if right because that string shouldn't work anyway.

but if I use

http_build_query(json_decode($that_string, true));

It will give signature error instead.

So how should I go with this to make it works?

For reference: https://www.bitmex.com/app/apiKeysUsage