> For the complete documentation index, see [llms.txt](https://services.stakeangle.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://services.stakeangle.com/mainnets/source-protocol/state-sync.md).

# State Sync

{% hint style="info" %}
State Sync allows to sync a new node by fetching a snapshot of the network state at a recent height, instead of fetching and replaying all historical blocks.
{% endhint %}

{% hint style="info" %}
Some networks which use `wasm` may not yet support `wasm` folder transfers with State Sync. In this case you may need to download `wasm` folder separately.
{% endhint %}

{% hint style="info" %}
Depending on network, State Sync may need different amount of RAM to successfully fish sync process. It is recommended to have at least 8GB RAM.
{% endhint %}

1. **Stop existing service and reset database.**

```
sudo systemctl stop sourced
sourced tendermint unsafe-reset-all --home $HOME/.source
```

2. **Add peers.**

```
PEERS="ace839c852739d1ea6e3675d30380fe085c1c23a@52.26.226.21:26656,8145d4d13511e7f89dbd257f51ed5d076941f12f@164.92.98.12:26656"
sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$PEERS\"/" $HOME/.source/config/config.toml
```

3. **Fill variables with data for State Sync.**

```
RPC="https://source-rpc.stakeangle.com:443"
RECENT_HEIGHT=$(curl -s $RPC/block | jq -r .result.block.header.height)
TRUST_HEIGHT=$((RECENT_HEIGHT - 1000))
TRUST_HASH=$(curl -s "$RPC/block?height=$TRUST_HEIGHT" | jq -r .result.block_id.hash)

echo $RECENT_HEIGHT $TRUST_HEIGHT $TRUST_HASH
```

4. **Add variable values to config.toml.**

```
sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"$RPC,$RPC\"| ; \
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$TRUST_HEIGHT| ; \
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"|" $HOME/.source/config/config.toml
```

5. **Start service and check journal.**

```
sudo systemctl restart sourced
sudo journalctl -u sourced -f -o cat
```

{% hint style="info" %}
State Sync typically takes up to 10 minutes. 
{% endhint %}