Union Snapshot

Snapshot

Network	union-testnet-8
Block	4,290,223
Pruning	custom 100/0/10
Indexer	null
Frequency	every 6 hours
Timestamp	21/11/2024 05:32 UTC
Age	53 minutes ago
Download	union_latest.tar.lz4 (1.7G)

The snapshot is designed for node opeartors to run an efficient node on Union chain. To make the snapshot as small as possible while still viable as a validator, we use the following setting to save on the disk space. It might be helpful for you to sync with our snapshot periodically because Tendermint chain storage grows over time regardless of the pruning. Since we periodically state-sync our snapshot nodes, you might notice that sometimes the size of our snapshot is surprisingly small.

app.toml

# Prune Type
pruning = "custom"

# Prune Strategy
pruning-keep-recent = "100"
pruning-keep-every = "0"
pruning-interval = "10"

config.toml

indexer = "null"

Install lz4 if needed

sudo apt update
sudo apt install lz4

Stop the service and reset the data

Reset your node. This will erase your node database. If you are already running validator, be sure you backed up your `priv_validator_key.json` prior to running the the command. The command does not wipe the file. However, you should have a backup of it already in a safe location.

WARNING: If you use this snapshot on a validator node during a chain halt, make sure you back up priv_validator_state.json and then replace it after the snapshot is extracted but before you start the node process. This is very important in order to avoid double-sign.

# Stop your node 
sudo systemctl stop uniond

# Back up priv_validator_state.json if needed
cp $HOME/.union/data/priv_validator_state.json $HOME/.union/priv_validator_state.json.backup

# Reset tendermint chain
uniond tendermint unsafe-reset-all --home $HOME/.union --keep-addr-book

Download latest snapshot

# Download the Union snapshot
wget -O union_latest.tar.lz4 https://snapshots.tienthuattoan.com/testnet/union/union_latest.tar.lz4

# Decompress the Union snapshot
lz4 -c -d union_latest.tar.lz4 | tar -x -C $HOME/.union

# Replace with the backed-up priv_validator_state.json
mv $HOME/.union/priv_validator_state.json.backup $HOME/.union/data/priv_validator_state.json

Restart the service and check the log

sudo systemctl restart uniond
sudo journalctl -u uniond -f

Remove downloaded snapshot to free up space

rm union_latest.tar.lz4