Backup and Restore Validator Node

DISCLAIMER: This guide is for informational purposes only. Use at your own risk. Always verify steps with official documentation and ensure you fully understand each action before proceeding.

Part 1: Backing Up the Node

1. Stop the node:

   sudo systemctl stop 0gd

2. Backup the wallet private key by exporting the Ethereum key:

   0gchaind keys unsafe-export-eth-key "wallet"

   Note: Write down this private key and store it securely.

3. Backup the validator key:

   • File location: /root/.0gchain/config/priv_validator_key.json

   • Copy this file to your local machine.

   • Store it carefully; this is the most crucial key for your validator.

4. If you've never backed up before, backup the entire config folder:

   cp -r /root/.0gchain/config /path/to/backup/location

Part 2: Restoring the Node and Wallet

1. Install a new node and sync the blockchain:

   # Steps to install a new node
   # Wait until the node is fully synced

2. Perform the restoration:

   a. Stop the new node:

   sudo systemctl stop 0gd

   b. WARNING: Ensure you've stopped the node on the old VPS. Never run 2 nodes with the same priv_validator_key.json. This will lead to double signing and potential slashing.

   c. Copy and replace the previously backed up priv_validator_key.json file into the /root/.0gchain/config/ directory of the new node.

   d. Restore the wallet:

   • From Private key:

     0gchaind keys unsafe-import-eth-key "wallet_name" "privatekey"

   • Or from mnemonic phrase:

     0gchaind keys add "wallet" --eth --recover

3. Restart the node:

   sudo systemctl start 0gd

4. Check the node and validator status to ensure everything is functioning normally.

Important Notes:

• Always backup important data before making any significant changes.

• Ensure you store keys and backups in a secure location, preferably offline.

• Never share your private key or mnemonic phrase with anyone.

• Always double-check before performing operations related to your validator to avoid the risk of slashing.