Sign challenge (WebSocket API)
The subscribe and unsubscribe requests to WebSocket private feeds require a signed challenge
message with the user api_secret.
The challenge is obtained as is shown in Section WebSocket API Public (using the api_key).
Authenticated requests must include both the original challenge message (original_challenge) and the signed (signed_challenge) in JSON format.
Challenge
The challenge is a UUID string.
Example c100b894-1729-464d-ace1-52dbce11db42 |
|---|
The steps to sign the challenge are the same as the steps to generate an authenticated REST request
except for step 1 which now is just the challenge string:
- 1
Hash the challenge with the SHA-256 algorithm
- 2
Base64-decode your api_secret
- 3
Use the result of step 2 to hash the result of step 1 with the HMAC-SHA-512 algorithm
- 4
Base64-encode the result of step 3
The result of the step 4 is the signed challenge which will be included in the subscribe request.
The table below shows the expected output from example inputs:
challenge | c100b894-1729-464d-ace1-52dbce11db42 |
|---|---|
api_secret | 7zxMEF5p/Z8l2p2U7Ghv6x14Af+Fx+92tPgUdVQ748FOIrEoT9bgT+bTRfXc5pz8na+hL/QdrCVG7bh9KpT0eMTm |
signed output | 4JEpF3ix66GA2B+ooK128Ift4XQVtc137N9yeg4Kqsn9PI0Kpzbysl9M1IeCEdjg0zl00wkVqcsnG4bm |