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Rotation of mnemonics

Rotation of mnemonics in tofnd

Starting from axelard v0.17.3 and tofnd v0.10.1, validators can use tofnd -m rotate to generate a new mnemonic and slowly rotate out their old mnemonics for better security practices. New Axelar key rotations will automatically use the most recent mnemonic generated by tofnd -m rotate.

Validators need to keep their old tofnd mnemonics until all keys generated from those mnemonics are considered "old" by the Axelar network. A key becomes old after x subsequent key rotations for that EVM chain. (Currently x=7.)

# Kill vald/tofnd processes
pkill -9 -f "vald"
pkill -f "tofnd"

# Rotate tofnd mnemonic
tofnd -m rotate -d $AXELARD_HOME/.tofnd

# Note: Keep the old mnemonic backups around

# BACKUP the new exported mnemonic and then DELETE the local copy
cp $TOFND_HOME/export ...
rm $TOFND_HOME/export

# Restart vald/tofnd processes as usual

After performing the rotation, monitor your validator to make sure it's still posting heartbeats and there are no unexpected errors in vald/tofnd logs. It's also useful to perform a health check.

Recovery of mnmenonics

As always, you can import a tofnd mnemonic with tofnd -m import -d $AXELARD_HOME/.tofnd. If there are no other mnemonics yet in tofnd storage then the imported mnemonic will be treated as the latest mnemonic, and automatically used for future key ids that are rotated to and any previous key ids it was already a part of. Each subsequent imported mnemonic is considered as "old" and so only used for any past key ids that corresponded to it.