Derive Macro Encoding 

#[derive(Encoding)]
{
    // Attributes available to this derive:
    #[spongefish]
}

Derive Encoding for structs.

Fields marked with #[spongefish(skip)] are omitted from the encoding. Any other #[spongefish(..)] form is a compile error.

Security

Skip only values that are recomputable, or genuinely irrelevant to the statement being proven.

A skipped field is not bound by the Fiat-Shamir transformation, and therefore is never part of the inputs to the random oracle, nor of the NARG string.

use spongefish::Encoding;

#[derive(Encoding)]
struct Rgb {
    r: u8,
    g: u8,
    b: u8,
}

let colors = Rgb { r: 1, g: 2, b: 3 };
let data = colors.encode();
assert_eq!(data.as_ref(), [1, 2, 3]);