Ethereum Error authentication needed password or unlock

+1 vote

I am using azure ethereum consortium network with Geth and MetaMask. and the following error is happening randomly:

0|server | (node:99208) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 53): Error: authentication needed: password or unlock

Sometimes the api call pass through successfully, and sometimes nodejs app logs show this. I unlocked the account multiple times using multiple ways giving me "true" boulean as follows:

personal.unlockAccount(eth.coinbase, "cDxxxxxxxxKaYZ", 300)

geth --exec "personal.unlockAccount(eth.accounts[0], 'cDb xxxxxxxKaYZ', 1000)" attach

Jul 20, 2018 in Blockchain by sabby
• 4,370 points
3,551 views

1 answer to this question.

0 votes
Best answer

First, make sure you have an account.

web3.personal.listAccounts

If you get [] ...

web3.personal.newAccount()

Next run

web3.personal.unlockAccount(web3.personal.listAccounts[0],"<password>", 15000)

this will unlock the first account with this password for 15,000 seconds. 

This should solve your error.

Get your Blockchain certification today to learn more about this technology.

Thanks.

answered Aug 8, 2018 by Omkar
• 69,210 points

selected Aug 8, 2018 by Omkar

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