4

I am using the following code to sign a message:

web3.currentProvider.sendAsync(
  {
    jsonrpc: '2.0',
    id: 1,
    method: 'personal_sign',
    params: [
      `My account is ${this.accounts[0]}`,
      this.accounts[0],
    ],
  },
  (err, res) => {
     // send res.result to server
  },
);

on the server i do the following:

// Recover the public key
const candidate = web3.eth.accounts.recover(`My account is ${account}`, signature);

// Verify the recovered key and the key making the request are the same
return ethUtil.toChecksumAddress(candidate) === ethUtil.toChecksumAddress(myPublicKey)

This works correctly when using MetaMask, but the recovered address does not match when using Opera on android. From what I can tell both are using v0.20.7 of web3. Anyone have any ideas?

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4
  • does it work if you use web3.personal.sign?
    – haxerl
    Aug 20, 2019 at 9:32
  • Unfortunately I get the error that personal sign is not supported @haxerl
    – pizzarob
    Aug 21, 2019 at 14:53
  • does it work when you change personal_sign to eth_sign or maybe try use send instead of sendAsync? and btw i though they have deprecated sendAsync function which resources did you read?
    – haxerl
    Aug 22, 2019 at 4:47
  • can you provide signed messages for both ? or transactions we can take the message from ?
    – Micky Socaci
    Aug 24, 2019 at 1:51

1 Answer 1

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1

When using MetaMask you have a different public/private key.

Therefore another value gets returned.

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1
  • I don't expect the values to be the same. I expect that web3.eth.accounts.recover gives me the correct address when recovering the signed message. However, when signing a message with Opera the address does not match that of the signing address when using the web3.eth.accounts.recover method
    – pizzarob
    Oct 6, 2019 at 23:38

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