Coreum

Run validator node

  • You should finish full node instruction first, because Validator node is built on top of the full node.

    Keep $COREUM_HOME/config/node_key.json and $COREUM_HOME/config/priv_validator_key.json files in a safe place, since they can be used to recover the validator node!

  • Set the moniker variable to reuse it in the following instructions.

export MONIKER="validator"
  • Set waiting window between validator restart to avoid double signing.

(Check if $COREUM_NODE_CONFIG is set(it should be there, if you haven't exited from the beginning of installation)

crudini --set $COREUM_NODE_CONFIG consensus double_sign_check_height 10

  • Init new account (if you don't have existing), which will be used for validator control, delegation and staking rewards/commission receiving

    cored keys add $MONIKER --keyring-backend os --chain-id=$COREUM_CHAIN_ID

    You will be asked to set the keyring passphrase, set it, and remember/save it, since you will need it to access your private key.

    The output example:

    - name: validator
  type: local
  address: testcorevaloper15fr7w6trtx8nzkjp33tcqj922q6r82tp05gdpe
  pubkey: '{"@type":"/cosmos.crypto.secp256k1.PubKey","key":"AwzsffiidUiFtmNng5pLTH6cj1hv4Ufa+zKZpmRVGfNk"}'
  mnemonic: ""

**Important** write this mnemonic phrase in a safe place.
It is the only way to recover your account if you ever forget your password.

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Attention! Keep the mnemonic phrase in a safe place, since it can be used to recover the key! (Don't be confused with empty mnemonic after pubkey, it is shown in the end of the output)

  • If you have the mnemonic you can import it (skip it if you generated account at the previous step)

    cored keys add $MONIKER --keyring-backend os --recover --chain-id=$COREUM_CHAIN_ID

    You will be asked to "Enter keyring passphrase" and "Enter your bip39 mnemonic".

  • Derive the validator-operator address, which will be used for validator creation.

    cored keys show $MONIKER --bech val --address --keyring-backend os --chain-id=$COREUM_CHAIN_ID
# output example:
# testcorevaloper15fr7w6trtx8nzkjp33tcqj922q6r82tp05gdpe

  • Fund the account.

  • Check that you have enough to create the validator(minimum self delegation is 20k)

    cored q bank balances  $(cored keys show $MONIKER --address --keyring-backend os --chain-id=$COREUM_CHAIN_ID) --denom $COREUM_DENOM --node=$COREUM_NODE --chain-id=$COREUM_CHAIN_ID

  • Wait until node is fully synced(its important). To check sync status run next command:

    echo "catching_up: $(echo  $(cored status) | jq -r '.SyncInfo.catching_up')"

    If the output is catching_up: false, then the node is fully synced.

  • Create validator

    • set up validator configuration

       # COREUM_VALIDATOR_DELEGATION_AMOUNT default is 20k, must be grater or equal COREUM_MIN_DELEGATION_AMOUNT.
 # We suggest setting 30k, in case of slashing you will be able to unjail validator without replenishing your balance.
 # (Otherwise your validator balance will went below 20k and to start it you should transfer tokens first)
 export COREUM_VALIDATOR_DELEGATION_AMOUNT=20000000000 # (Required) 
 export COREUM_VALIDATOR_NAME="" # (Required) update it with the name which is visible on the explorer
 export COREUM_VALIDATOR_WEB_SITE="" # (Optional) update with the site
 export COREUM_VALIDATOR_IDENTITY="" # (Optional) update with identity id, which can generated on the site https://keybase.io/
 export COREUM_VALIDATOR_COMMISSION_RATE="0.10" # (Required) Update with your commission rate
 export COREUM_VALIDATOR_COMMISSION_MAX_RATE="0.20" # (Required) Update with your commission max rate
 export COREUM_VALIDATOR_COMMISSION_MAX_CHANGE_RATE="0.01" # (Required) Update with your commission max change rate
 export COREUM_MIN_DELEGATION_AMOUNT=20000000000 # (Required) default 20k, must be grater or equal min_self_delegation parameter on the current chain

    • create validator

      cored tx staking create-validator \
--amount=$COREUM_VALIDATOR_DELEGATION_AMOUNT$COREUM_DENOM \
--pubkey="$(cored tendermint show-validator --chain-id=$COREUM_CHAIN_ID)" \
--moniker="$COREUM_VALIDATOR_NAME" \
--website="$COREUM_VALIDATOR_WEB_SITE" \
--identity="$COREUM_VALIDATOR_IDENTITY" \
--commission-rate="$COREUM_VALIDATOR_COMMISSION_RATE" \
--commission-max-rate="$COREUM_VALIDATOR_COMMISSION_MAX_RATE" \
--commission-max-change-rate="$COREUM_VALIDATOR_COMMISSION_MAX_CHANGE_RATE" \
--min-self-delegation=$COREUM_MIN_DELEGATION_AMOUNT \
--gas auto \
--chain-id=$COREUM_CHAIN_ID \
--from=$MONIKER \
--keyring-backend os -y -b block $COREUM_CHAIN_ID_ARGS

  • (Optional) Troubleshooting

    • Error:

      Error: rpc error: code = NotFound desc = rpc error: code = NotFound desc = account testcore15fr7w6trtx8nzkjp33tcqj922q6r82tp077avs not found: key not found

      It means that your node is not synced yet, wait for the full sync

    • Error:

      Enter keyring passphrase: Error: invalid character 'o' looking for beginning of value Usage: cored tx staking create-validator [flags]

      One of the reasons could be by using --home tag during full-node creation and skipping that tag in validator commands. Another reason - confusion between devnet and testnet. Check if you use proper variables in your commands.

      So, be consistent in your full node and validator commands.

  • (Optional) You will receive tx hash, final status of which you can check at block explorer.

  • If you have done everything right, you can see your validator at Block Explorer validators section

What is next?

  • If your validator was jailed, you can find instructions how to unjail my validator here
  • If you don't want to expose your validator node to the internet, but still want to interact with the network, you can run sentry node.
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