Module sign 

The signature of a request: HMAC-SHA256, written as lower case hex.

A REST request signs timestamp + api_key + recv_window + payload, where the payload is the query string of a GET or the JSON body of a POST, exactly as sent. The WebSocket login signs GET/realtime plus the expires time.

Functions

rest_payload

The string a REST request signs.

sign

HMAC-SHA256 of payload with secret, as lower case hex.

ws_auth_args

The args of the WebSocket login: the key, the expires time (milliseconds, in the future) and the signature of GET/realtime{expires}.