How to bootstrap any tendermint (cosmos) node using State-Sync

State sync rapidly bootstraps a new node by discovering, fetching, and restoring a state machine snapshot from peers instead of fetching and replaying historical blocks. Requires some peers in the network to take and serve state machine snapshots.

Step by step gude how to bootstrap Cosmic-Horizon darkmatter-1 testnet chain

# set variables
CHAIN_HOME=$HOME/.coho
CHAIN_SERVICE=cohod
CHAIN_BINARY=cohod

# set rpc endpoints and peers
SNAPSHOT_RPC1="http://62.171.147.117:26657"
SNAPSHOT_RPC2="http://62.171.152.201:26657"
PEER1="[email protected]:26656"
PEER2="[email protected]:26656"

# stop the chain service and perform reset
sudo systemctl stop $CHAIN_SERVICE && $CHAIN_BINARY unsafe-reset-all

# set state sync config variables
LATEST_HEIGHT=$(curl -s $SNAPSHOT_RPC1/block | jq -r .result.block.header.height)
BLOCK_HEIGHT=$((LATEST_HEIGHT - 2000))
TRUST_HASH=$(curl -s "$SNAPSHOT_RPC1/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash)

# check
echo $LATEST_HEIGHT $BLOCK_HEIGHT $TRUST_HASH

# set peers
peers="$PEER1,$PEER2"
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $CHAIN_HOME/config/config.toml

# write config to config.toml (onde command)
sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"$SNAPSHOT_RPC1,$SNAPSHOT_RPC2\"| ; \
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ; \
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"| ; \
s|^(seeds[[:space:]]+=[[:space:]]+).*$|\1\"\"|" $CHAIN_HOME/config/config.toml

# start the service
sudo systemctl start $CHAIN_SERVICE

# check a logs
sudo journalctl -u $CHAIN_SERVICE -f