sign

Signature

sign(data: Uint8Array, seed: Seed): Promise<Uint8Array>

Purpose

Signs arbitrary bytes using the private key derived from a seed. Returns a 64-byte SchnorrQ signature. The function is async by design to allow non-breaking addition of native backends in the future — always await it.

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

const seed = toSeed("aaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
const message = new TextEncoder().encode("hello qubic")

const signature: Uint8Array = await sign(message, seed)
// signature.length === 64

Parameters

Returns

Promise<Uint8Array> — 64-byte SchnorrQ signature.

For signing Qubic transactions, use signTransaction from @qubic.org/tx instead — it serializes the transaction header, appends the signature, and returns the complete signed bytes ready for broadcast. sign is for signing arbitrary messages outside the transaction format.