State Sync (recommended)
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.
How To
If you are starting from scratch, initialize your node:
# Note: if syncing testnet, change the chain-id to `grand-1`
nobled init <moniker> --chain-id noble-1
Otherwise, ensure your node is stopped, then reset state:
nobled comet unsafe-reset-all --keep-addr-book
In your config.toml you will need to set four values:
$HOME/.noble/config/config.toml
[statesync]
enable = true
...
rpc_servers = ""
trust_height = 0
trust_hash = ""
Here is a helpful script to fill out the above values1:
state_sync.sh
#!/bin/bash
NOBLE_RPC="https://rpc.noble.xyz:443"
POLKA_RPC="https://noble-rpc.polkachu.com:443"
# TESTNET
# NOBLE_RPC="https://testnet-rpc.noble.xyz:443"
# POLKA_RPC="https://noble-testnet-rpc.polkachu.com:443"
LATEST_HEIGHT=$(curl -s $NOBLE_RPC/block | jq -r .result.block.header.height); \
BLOCK_HEIGHT=$((LATEST_HEIGHT - 2000)); \
TRUST_HASH=$(curl -s "$NOBLE_RPC/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash)
sed -i.bak -E "
s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"$NOBLE_RPC,$POLKA_RPC\"| ; \
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ; \
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"|" $HOME/.noble/config/config.toml
Ensure script has privileges to execute, then run it:
chmod 700 state_sync.sh
./state_sync.sh
Start your node, it should be begin syncing!
nobled start
⚠️ If you are having trouble, you can try adding peers(Mainnet|Testnet) to
persistent_peers of your config.toml.
More Info
You can read more about state sync in the Cosmos SDK core documentation.