State-Sync
State-sync is a module built into the Cosmos SDK to allow validators to rapidly join the network by syncing your node with a snapshot enabled RPC from a trusted block height.
This greatly reduces the time required for a validator or sentry to sync with the network from days to minutes. The limitations of this are that there is not a full transaction history, just the most recent state that the state-sync RPC has stored. An advantage of state-sync is that the database is very small in comparison to a fully synced node, therefore using state-sync to re-sync your node to the network can help keep running costs lower by minimizing storage usage.
By syncing to the network with state-sync, a node can avoid having to go through all the upgrade procedures and can sync with the most recent binary only.
NOTE: For nodes that are intended to serve data for dapps, explorers, or any other RPC requiring full history, state-syncing to the network would not be appropriate.
Lavender.Five Nodes and SecretNFT are operating and maintaining the snapshot RPCs.
The state-sync configuration is as follows:
# snapshot-interval specifies the block interval at which local state sync snapshots are
# taken (0 to disable). Must be a multiple of pruning-keep-every.
snapshot-interval = 2000
# snapshot-keep-recent specifies the number of recent snapshots to keep and serve (0 to keep all).
snapshot-keep-recent = 3
SNAP_RPC="https://rpc.secret.express:443"
Set the state-sync
BLOCK_HEIGHT and fetch the TRUST_HASH from the snapshot RPC. The BLOCK_HEIGHT to sync is determined by finding the latest block that's a multiple of snapshot-interval.BLOCK_HEIGHT=$(curl -s $SNAP_RPC/block | jq -r .result.block.header.height | awk '{print $1 - ($1 % 6000)}'); \
TRUST_HASH=$(curl -s "$SNAP_RPC/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash)
echo $BLOCK_HEIGHT $TRUST_HASH
# output should be similar to:
# 3506000 FCB54D74A4A33F8C1CC18A7240D76D87CB192A89C17837C4DB6C6140612DDFEB74A4A33F8C1CC18A7240D76D87CB192A89C17837C4DB6C6140612DDFEB
sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"https://rpc.cosmos.directory:443/secretnetwork,https://rpc.secret.express:443\"| ; \
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ; \
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"|" $HOME/.secretd/config/config.toml
This will erase your node database. If you are already running validator, be sure you backed up your
config/priv_validator_key.json and config/node_key.json prior to running unsafe-reset-all.It is recommended to copy
data/priv_validator_state.json to a backup and restore it after unsafe-reset-all to avoid potential double signing.sudo systemctl stop secret-node && secretd tendermint unsafe-reset-all --home ~/.secretd/ --keep-addr-book
IAVL fast node must be disabled, otherwise the daemon will attempt to upgrade the database while state sync is occuring.
sed -i.bak -e "s/^iavl-disable-fastnode *=.*/iavl-disable-fastnode = true/" ~/.secretd/config/app.toml
This generally takes several minutes to complete, but has been known to take up to 24 hours. To better help the process along, add seeds.
sudo systemctl restart secret-node && journalctl -fu secret-node
Expected State Sync Output
Last modified 5mo ago