The keys that are generated from
eth2.0-deposit-cli can be easily loaded into
a Lighthouse validator client (
lighthouse vc). In fact, both of these
programs are designed to work with each other.
This guide will show the user how to import their keys into Lighthouse so they can perform their duties as a validator. The guide assumes the user has already installed Lighthouse.
Whilst following the steps on the website, users are instructed to download the
eth2-deposit-cli script will generate the validator BLS keys
validator_keys directory. We assume that the user's
present-working-directory is the
eth2-deposit-cli repository (this is where
you will be if you just ran the
./deposit.sh script from the Eth2 Launch pad
website). If this is not the case, simply change the
--directory to point to
Now, assuming that the user is in the
eth2-deposit-cli directory and they're
using the default (
validators directory (specify a different one using
--validators-dir flag), they can follow these steps:
Docker users should use the command from the Docker section, all other users can use:
lighthouse --testnet medalla account validator import --directory validator_keys
Note: The user must specify the testnet that they are importing the keys for using the
After which they will be prompted for a password for each keystore discovered:
Keystore found at "validator_keys/keystore-m_12381_3600_0_0_0-1595406747.json": - Public key: 0xa5e8702533f6d66422e042a0bf3471ab9b302ce115633fa6fdc5643f804b6b4f1c33baf95f125ec21969a3b1e0dd9e56 - UUID: 8ea4cf99-8719-43c5-9eda-e97b8a4e074f If you enter a password it will be stored in validator_definitions.yml so that it is not required each time the validator client starts. Enter a password, or press enter to omit a password:
The user can choose whether or not they'd like to store the validator password
validator_definitions.yml file. If the
password is not stored here, the validator client (
application will ask for the password each time it starts. This might be nice
for some users from a security perspective (i.e., if it is a shared computer),
however it means that if the validator client restarts, the user will be liable
to off-line penalties until they can enter the password. If the user trusts the
computer that is running the validator client and they are seeking maximum
validator rewards, we recommend entering a password at this point.
Once the process is done the user will see:
Successfully imported keystore. Successfully updated validator_definitions.yml. Successfully imported 1 validators (0 skipped). WARNING: DO NOT USE THE ORIGINAL KEYSTORES TO VALIDATE WITH ANOTHER CLIENT, OR YOU WILL GET SLASHED..
The import process is complete!
Now the keys are imported the user can start performing their validator duties
lighthouse vc and checking that their validator public key appears
voting_pubkey in one of the following logs:
INFO Enabled validator voting_pubkey: 0xa5e8702533f6d66422e042a0bf3471ab9b302ce115633fa6fdc5643f804b6b4f1c33baf95f125ec21969a3b1e0dd9e56
Once this log appears (and there are no errors) the
lighthouse vc application
will ensure that the validator starts performing its duties and being rewarded
by the protocol. There is no more input required from the user.
import command is a little more complex for Docker users, but the example
in this document can be substituted with:
docker run -it \ -v $HOME/.lighthouse:/root/.lighthouse \ -v $(pwd)/validator_keys:/root/validator_keys \ sigp/lighthouse \ lighthouse --testnet medalla account validator import --directory /root/validator_keys
Here we use two
-v volumes to attach:
~/.lighthouseon the host to
/root/.lighthousein the Docker container.
validator_keysdirectory in the present working directory of the host to the
/root/validator_keysdirectory of the Docker container.