Unable to sign a message on geth Console

Question

I have two accounts on my geth node . The geth node is syncing with the Ropsten testnet . I executed the following commands

personal.unlockAccount(eth.accounts[1],'Test');

The result was true

After this I tried to sign data by using the following :-

web3.eth.sign("Hello world", eth.accounts[1]).then(console.log);

But can see an error message "invalid address"

What could be causing this error ? Any help appreciated.

Answer 1

Correct syntax for eth.sign is web3.eth.sign(address, dataToSign, [, callback]), you switched address and data, also make sure to give hex string or use web3.toHex for dataToSign parameter.