State sync

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Chain ID	Latest Version Tag	Wasm

Note

State Sync allows a new node to join the network by fetching a snapshot of the application state at a recent height instead of fetching and replaying all historical blocks. Since the application state is generally much smaller than the blocks, and restoring it is much faster than replaying blocks, this can reduce the time to sync with the network from days to minutes.

Stop the service and reset the data

sudo systemctl stop _project_name_.service
cp $HOME/._project_name_/data/priv_validator_state.json $HOME/._project_name_/priv_validator_state.json.backup
_project_bin_ tendermint unsafe-reset-all --keep-addr-book --home $HOME/._project_name_

Get and configure the state sync information

STATE_SYNC_RPC=https://_project_name_-testnet.rpc.ksalab.xyz:443
STATE_SYNC_PEER=_state_sync_
LATEST_HEIGHT=$(curl -s $STATE_SYNC_RPC/block | jq -r .result.block.header.height)
SYNC_BLOCK_HEIGHT=$(($LATEST_HEIGHT - 500))
SYNC_BLOCK_HASH=$(curl -s "$STATE_SYNC_RPC/block?height=$SYNC_BLOCK_HEIGHT" | jq -r .result.block_id.hash)

sed -i \
  -e "s|^enable *=.*|enable = true|" \
  -e "s|^rpc_servers *=.*|rpc_servers = \"$STATE_SYNC_RPC,$STATE_SYNC_RPC\"|" \
  -e "s|^trust_height *=.*|trust_height = $SYNC_BLOCK_HEIGHT|" \
  -e "s|^trust_hash *=.*|trust_hash = \"$SYNC_BLOCK_HASH\"|" \
  -e "s|^persistent_peers *=.*|persistent_peers = \"$STATE_SYNC_PEER\"|" \
  $HOME/._project_name_/config/config.toml

mv $HOME/._project_name_/priv_validator_state.json.backup $HOME/._project_name_/data/priv_validator_state.json

Restart the service and check the log

sudo systemctl start _project_name_.service && sudo journalctl -u _project_name_.service -f --no-hostname -o cat