Backup

Part 1: Backing Up the Node

Stop the Node

sudo systemctl stop 0gd.service

Backup the Wallet Private Key (Ethereum)

Export your Ethereum wallet private key:

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

Backup the Validator Key

The validator key is located here:

/root/.0gchain/config/priv_validator_key.json

Copy this file to your local machine. This is your most important key as a validator. Losing it means losing control of your validator.

If you’ve never made a backup before, it’s recommended to back up the entire config folder:

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

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Part 2: Restoring the Node and Wallet

Install a Fresh Node and Sync the Blockchain

Follow the instructions to install a new node and wait until the blockchain is fully synced.

💡 Tip: Refer to the official 0G documentation or installation guide to set up the new node.

Stop the New Node Before Restoration

sudo systemctl stop 0gd

⚠️ Important Warning

Make sure the old VPS node is stopped. Never run two nodes using the same priv_validator_key.json, as this will cause double signing and could result in slashing.

Restore Validator Key

Copy and replace the previously backed up priv_validator_key.json into:

/root/.0gchain/config/

Restore Wallet

From Private Key:

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

From Mnemonic Phrase:

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

Restart the Node

sudo systemctl start 0gd

Validate the Node and Validator Status

Make sure everything is operating correctly by checking your node and validator status:

0gchaind status

Or check validator info:

0gchaind q staking validator $(0gchaind keys show wallet --bech val -a)

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⚠️ Caution

• Always back up critical data before any major actions.
• Store your keys and backups in a secure, preferably offline, location (e.g. hardware wallet, encrypted USB, or offline password manager).
• Never share your private key or mnemonic phrase with anyone. Beware of phishing sites or impersonators.
• Double-check every operation involving your validator to avoid risks like slashing. Ensure the chain ID, gas fees, and validator address are correct.