@spidexjs/metamask-sign-recover-pubkey v0.1.6

metamask-sign-recover-pubkey

How to recover pubkey by metamask signature,

Metamask eth_getEncryptionPublicKey function cannot use

ethereum
  .request({
    method: 'eth_getEncryptionPublicKey',
    params: [accounts[0]], // you must have access to the specified account
  })

So we need get pubkey from signature

img_1.png

example

import {getPubkey} from "@spidexjs/metamask-sign-recover-pubkey";

const pubkey = await getPubkey(account.address);
console.log(pubkey);
// AiJbGH7xjbW7PoDClLDb3On9YgiWXQMq2cHIA1v4lfPj

  const {ethereum}: any = window;
 
  // message hex
  let message = arrayify(hashMessage('generate_pubkey'));
  let 0xhex = "0x" + ua2hex(message)
  const sign = await ethereum.request({method: "eth_sign", params: [address, 0xhex]});
  const pk = signatureToPubkey(
    sign,
    Buffer.from(message)
  )

  console.log('pubkey:', pk)
  
  //pubkey : AiJbGH7xjbW7PoDClLDb3On9YgiWXQMq2cHIA1v4lfPj
  return pk;