# State Sync

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

```
sudo systemctl stop gravity-node
gravity tendermint unsafe-reset-all --home $HOME/.gravity --keep-addr-book
```

2. **Add peers.**

```
SEEDS="6770e29a9224810bcde6655b742d52b8a49d51e8@65.19.136.133:26656,63e662f5e048d4902c7c7126291cf1fc17687e3c@95.211.103.175:26656"
PEERS="77367b424f624c4f9f423267dd8d4d559b289b62@167.235.9.250:26656"
sed -i -e "s/^seeds *=.*/seeds = \"$SEEDS\"/; s/^persistent_peers *=.*/persistent_peers = \"$PEERS\"/" $HOME/.gravity/config/config.toml
```

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

```
RPC="https://gravity-rpc.stakeangle.com:443"
RECENT_HEIGHT=$(curl -s $RPC/block | jq -r .result.block.header.height)
TRUST_HEIGHT=$((RECENT_HEIGHT - 2000))
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/.gravity/config/config.toml
```

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

```
sudo systemctl restart gravity-node
sudo journalctl -u gravity-node -f -o cat
```

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