multisig-hmac/examples/stored.js

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const MultisigHMAC = require('..')

const multisigHmac = new MultisigHMAC(MultisigHMAC.SHA256_PRIMITIVE)

// generate keys, which need to be stored securely
// and need to be shared securely with each party
const k1 = multisigHmac.keygen(0)
const k2 = multisigHmac.keygen(1)
const k3 = multisigHmac.keygen(2)

// Sign by each client with 2-of-3
const data = Buffer.from('Hello world')

// Notice no mention of nonce here. The data can follow whatever format you
// desire, but should include a nonce
const s1 = multisigHmac.sign(k1, data)
const s3 = multisigHmac.sign(k3, data)

const signature = multisigHmac.combine([s1, s3])

// Verify on the server
const threshold = 2
const keys = [k1, k2, k3]

const verified = multisigHmac.verify(keys, signature, data, threshold)
console.log(verified)