Std.Crypto.hmacSha256

fn

This is a callable function.

What it does

The keyed digest that proves who a message came from.

A digest says a message was not altered by accident. A keyed digest says it

came from someone holding the key, which is the question a webhook, a

signed cookie, and an API signature all ask. Anyone can compute a digest of

a forged message; only a holder of the key can compute this.

This is where the compiler's own implementation is reached rather than the

one written above in Pudu. The reason is speed: a key derivation runs

thousands of these, and the readable implementation is for reading.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.