Self-Addressing Identifier

Self-Addressing Identifier (SAI) provides a compact text representation of digests of data. It supports multiple hash algorithms.

Self Addressing Identifier is base64 encoded hash of data, prepended with one or two letter prefix, called derivation code. Derivation code determines which hash algorithm was used to derive the digest.

Usage

To derive Self Addressing Identifier, SelfAddressing enum can be used. It determines hashing algorithm used for Identifier derivation. Here are its possible values:

pub enum SelfAddressing {
    Blake3_256,
    Blake2B256(Vec<u8>),
    Blake2S256(Vec<u8>),
    SHA3_256,
    SHA2_256,
    Blake3_512,
    SHA3_512,
    Blake2B512,
    SHA2_512,
}

verify_bindings function checks if provided data matches digest encoded in Self Addressing Identifier.

Example

let data = "hello there";
let sai = SelfAddressing::Blake3_256.derive(data.as_bytes());

assert_eq!(format!("{}", sai), "E2bCqepXGid_9s1nSEyKk4kljbl3GULx5JjkFvIwJ8sk");
assert!(sai.verify_binding(data.as_bytes()));
assert!(!sai.verify_binding("wrong data".as_bytes()));

wasm

bindings/sai_wasm directory contains a project which allows to compile sai library to wasm.