ecRecover issue, please help

[xiongzhend]

I am trying to use ecRecover in 1.0.0-beta.50, not working!

I expected to get the recoveredAddress, but get Error

code is here

·
var account_address = '0x3Df7a01f4CE7d6F9870325B219647daFF3f3467c';
var message = '8dfe9be33ccb1c830e048219729e8c01f54c768004d8dc035105629515feb38e';
console.log(message.length);
var messageBuffer = new Buffer(message, 'hex');
console.log('message: ' + message);
web3.eth.personal.sign(message, account_address, '123456').then(result => {
console.log('signature: ' + result);
var pub = web3.eth.personal.ecRecover(message, result).then(recoveredAddress => {
console.log('recoveredAddress: ' + recoveredAddress);
console.log('isMatch: ' + recoveredAddress === account_address);
});
});
·

Error Logs

(node:8572) UnhandledPromiseRejectionWarning: Error: Invalid Arguments length: expected: 3, given: 2......

Versions

• web3.js: 1.0.0-beta.50
• nodejs: 8.14.0
• browser: no
• ethereum node: 1.8.23