Why is the calculated address incorrect？ about php-ecrecover HOT 1 OPEN

I was facing the same issue, it appeared to be an error in my code. When creating a signing message you you do it like this:

var web3 = new Web3(window.ethereum);
					
const accounts = await web3.eth.getAccounts();
		
const msgtext = "Hello world";
const message = web3.utils.fromUtf8(msgtext);
				
const signature = await web3.eth.personal.sign(message, accounts[0]);

I was using const message = web3.utils.sha3("Hello world"); which is wrong.

Your goal is to have the message visible in metamask window when signing, so no 0xhash there.

In PHP file simple do:

echo personal_ecRecover($message, $signature);

And it works. Took me a while to figure this out so I hope it helps someone with the same problem.

from php-ecrecover.