import SHA256 from "@chainsafe/as-sha256";

let hash: Uint8Array;

// create a new sha256 context
const sha256 = new SHA256();
// with init(), update(data), and final()
hash = sha256.init().update(Buffer.from("Hello world")).final();

// or use a one-pass interface
hash = SHA256.digest(Buffer.from("Hello world"));

// or use a faster one-pass interface for hashing (only) 64 bytes
hash = SHA256.digest64(Buffer.from("abcdefghabcdefghabcdefghabcdefghabcdefghabcdefghabcdefghabcdefgh"));