Run full node

Attention! If you are planning to run a node against the devnet (either a full node or a validator node), be mindful that the devnet might be restarted without prior notice (i.e block height set to 0 and all state removed), and you should be prepared to act accordingly by removing all state and start from zero.

The doc describes the procedure of creating and running the validator node.

Check requirements
Set up node prerequisites
Install cored binary.
Verify that network variables are set up correctly.
Set the moniker variable to reuse it in the following instructions.

export MONIKER="full"

Init the node The command will create a default node configuration

cored init $MONIKER $COREUM_CHAIN_ID_ARGS

Set the common connection config using the doc.
Set the config path variables.

COREUM_APP_CONFIG=$COREUM_HOME/config/app.toml
COREUM_NODE_CONFIG=$COREUM_HOME/config/config.toml

(Optional) Enable REST APIs disabled by default.

crudini --set $COREUM_APP_CONFIG api enable true # enable API
crudini --set $COREUM_APP_CONFIG api swagger true # enable swagger UI for the API

If you face File contains parsing errors issue, check troubleshooting section

(Optional) Enable prometheus monitoring.

crudini --set $COREUM_NODE_CONFIG instrumentation prometheus true

(Optional) If you want your validator to be a state sync server (provide state snapshots for other nodes), you can enable it:

crudini --set $COREUM_APP_CONFIG state-sync snapshot-interval 500
crudini --set $COREUM_APP_CONFIG state-sync snapshot-keep-recent 3

You can read Using State Sync document to get more details.

That configuration is required for the state-sync servers, used as a snapshot provided for the nodes.

Enable state-sync, so your validator can sync by snapshot. With the state-sync you can ignore past network upgrades, but if you want to have a node with full block history, instead of state-sync you should visit this section

You can read Using State Sync document to get more details.

** Get at least two state sync servers and set them from the doc:

export COREUM_STATE_SYNC_SERVERS="{State sync servers}"

** Get the trusted block hash and height

# Get block details from one of the state sync servers
CURRENT_BLOCK_DETAILS=$(curl ${COREUM_STATE_SYNC_SERVERS#*,}/block | jq -r '.result.block.header.height + "\n" + .result.block_id.hash')
CURRENT_BLOCK_HEIGHT=$(echo $CURRENT_BLOCK_DETAILS | head -1 )
TRUSTED_BLOCK_HEIGHT=$(expr $CURRENT_BLOCK_HEIGHT - 500)
TRUSTED_BLOCK_DETAILS=$(curl "${COREUM_STATE_SYNC_SERVERS#*,}/block?height=${TRUSTED_BLOCK_HEIGHT}" | jq -r '.result.block.header.height + "\n" + .result.block_id.hash')
TRUSTED_BLOCK_HASH=$(echo $TRUSTED_BLOCK_DETAILS | tail -n 1 )

If you see Failure writing output to destination error, check if jq is installed. ** Check if you have needed data:

echo "height:$TRUSTED_BLOCK_HEIGHT, hash:$TRUSTED_BLOCK_HASH"
# Output should be similar to "height:1425435, hash:9ADD8B2035F6B79F58B75D6F66A4B9B148787204553344295C7117417AEB856C"

** Enable state sync

# Change statesync settings
crudini --set $COREUM_NODE_CONFIG statesync enable true
crudini --set $COREUM_NODE_CONFIG statesync rpc_servers "\"$COREUM_STATE_SYNC_SERVERS\""
crudini --set $COREUM_NODE_CONFIG statesync trust_height $TRUSTED_BLOCK_HEIGHT
crudini --set $COREUM_NODE_CONFIG statesync trust_hash "\"$TRUSTED_BLOCK_HASH\""

Start the node.
- Start with cosmovisor (recommended)
```
cosmovisor run start $COREUM_CHAIN_ID_ARGS
```
- Start with cored
```
cored start $COREUM_CHAIN_ID_ARGS
```
Attention! Make sure that the node will be automatically started after a node restart. Add it as an OS "service", or schedule the start using the tools you prefer.
(Optional) You can also search logs for height value - it shows the latest fetched block by your node. If it is increasing - all good!
(Optional) You can check sync status of your node by next command:

echo "catching_up: $(echo  $(cored status) | jq -r '.SyncInfo.catching_up')"
# if output is "false", you are ready to start your validator

What is next?

You can run validator node

Become Validator Overview

Run Validator Node