Description

This role configures the lido-withdrawals-automation command-line tool as a cron job.

The tool assists in the generation of pre-signed exit messages that will be used by the LIDO ejector tool whenever the LIDO smart contracts indicate that a particular validator must be withdrawn from the protocol (to serve a request for a sizable liquid staking withdrawal). In particular, the tools performs the following steps:

• Fetches validator data from the KAPI endpoint
• Creates withdrawal messages and signs them using the remote signer or the Keymanager API running on one or more hosts
• Encrypts the signed messages using the specified password
• Saves the encrypted messages to a specified output folder. The ejector must be configured to look for exit messages in the same folder.

Details

The tool runs as a docker container from Dockerfile. Ansible runs the container once and then creates a crontab to run the container periodically. After the lido-withdrawals-automation container finish, the Ejector container is restarted (to pick up the newly created exit messages). The script started by cron is generated from the templates/containers.sh.j2 template.

Configuration

In order for lido-withdrawals-automation to function, the following variables must be specified by users of this role:

• percentage
• kapi_url
• remote_signer_url
• key_manager_urls
• password
• output_folder
• operator_id
• beacon_node_url
• module_id

You must define at least one of the "remote_signer_url" or "key_manager_urls" variables. If the specified configuration is incomplete, the container will exit immediately with the exit code 130.