Function generate_signature

pub fn generate_signature(
    nonce: u64,
    secret: &str,
    endpoint: &str,
    encoded_data: String,
) -> Signature

Generates the signature for an arbitrary request when provided with a nonce, API secret key, the endpoint, and the encoded data being sent.

This is HMAC-SHA512(uri + sha256(nonce + post_data)), but the exact details are given by Kraken's documentation.

Errors can occur due to formatting, url-encoding (or not) of specific data, and other details, but this implementation does not specify that encoded_data is anything but a String.