Ethereum: bitcoin-cli fails with auth error

Ethereum: Bitcoin CLI fails with authentication error

As a developer working with the Ethereum blockchain, it is important to understand how to interact with the network using command line tools such as bitcoin-cli. However, I recently encountered an issue where bitcoin-cli would fail with an authentication error. In this article, we will look at the issue and provide steps to resolve it.

Problem:

When running bitcoin-cli without any arguments, the following output is generated:

Usage: bitcoin-cli [options]  [...]
or
bitcoin-  [...]
Bitcoin CLI version 1.2.3
Error: Authentication failure for user 'username': not found.

The error message indicates that bitcoin-cli cannot find an account with the specified username.

Solution:

To resolve this issue, you must specify a valid username and password using the -user and -pass options. Here is the corrected command:

bitcoind -datadir=/Users/varunvb/Downloads -conf=/Users/varunvb/Downloads/bitcoin.conf -daemon -user 'username' -pass 'password'

Explanation:

• The -user option specifies the username to use for authentication.

• The -pass option specifies the user’s password.

• You should replace 'username' and 'password' with the actual credentials of your Ethereum account.

Example use case:

For example, let’s say you want to transfer ETH from one wallet to another. Run the following command:

bitcoind -datadir=/Users/varunvb/Downloads -conf=/Users/varunvb/Downloads/bitcoin.conf -daemon -user 'myusername' -pass 'mypassword'

This will authenticate your Ethereum wallet and allow you to transfer ETH between wallets.

Tips and Variations:

• If you use a different username or password, make sure to update your bitcoin.conf file accordingly.

• You can also specify multiple users by separating them with commas in the -user option. For example:

bitcoind -datadir=/Users/varunvb/Downloads -conf=/Users/varunvb/Downloads/bitcoin.conf -daemon -user 'username1, username2'

By following these steps and tips, you should be able to resolve the authentication error with bitcoin-cli when running it as a daemon.

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