utils publicKeyFromPrivateKey.ts

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  import nacl from 'tweetnacl'
 
export default function publicKeyFromPrivateKey(
  cryptoAccountPrivateKey: string
) {
  const keyPair = nacl.sign.keyPair.fromSeed(
    Buffer.from(cryptoAccountPrivateKey, 'hex').subarray(16)
  )
  // stored in database without DER prefix
  return Buffer.from(keyPair.publicKey).toString('hex')
}