message: fix bug in sk->pk
diff: @@ -23,7 +23,7 @@ export function publicKeyToAddress(publicKey: string) {
  }
  export function getPublicKeyFromPrivate(privateKey: string) {
  - const keyPair = new ECPair(bigi.fromHex(sk))
  + const keyPair = new ECPair(bigi.fromHex(privateKey))
  return keyPair.getPublicKeyBuffer().toString('hex')
  }
  