Learn how to rollback the chain version in the case of an unsuccessful chain upgrade.
In order to restore a previous chain version, the following data must be recovered by validators:
- the database that contains the state of the previous chain (in
priv_validator_state.jsonfile of the validator (also in
If validators don't possess their database data, another validator should share a copy of the database. Validators will
be able to download a copy of the data and verify it before starting their node. If validators don't have the backup
priv_validator_state.json file, then those validators will not have double-sign protection on their first block.
Restoring State Procedure
First, stop your node.
Then, copy the contents of your backup data directory back to the
EVMOS_HOME/datadirectory (which, by default, should be
# Assumes backup is stored in "backup" directory
rm -rf ~/.evmosd/data
mv backup/.evmosd/data ~/.evmosd/data
- Next, install the previous version of Evmos.
# from evmos directory
git checkout <prev_version>
## verify version
evmosd version --long
- Finally, start the node.