Getting started

Import what you need

import { publicKeyFromSeed, deriveIdentityFromSeed, sign } from "@qubic.org/crypto"
import { toSeed } from "@qubic.org/types"

Brand your seed string

const seed = toSeed("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
// seed is now typed as Seed — safe to pass to crypto functions

Derive the public key and identity

const publicKey = publicKeyFromSeed(seed)        // Uint8Array (32 bytes)
const identity  = deriveIdentityFromSeed(seed)   // Identity ("BPFJANADBB...")

console.log("Identity:", identity)
console.log("Public key:", Buffer.from(publicKey).toString("hex"))

Sign a digest

const digest    = new Uint8Array(32) // replace with your actual transaction digest
const signature = await sign(digest, seed) // Uint8Array (64 bytes)

console.log("Signature:", Buffer.from(signature).toString("hex"))

Only sign is async — always await it. publicKeyFromSeed, deriveIdentityFromSeed, verify, and k12 are all synchronous.