> For the complete documentation index, see [llms.txt](https://docs.twilight.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.twilight.org/validity-gadget/chaintip-attestation.md).

# Chaintip Attestation

Validators first send the Chaintip attestations received from fork scanner via websocket connection to the BTCOracle.&#x20;

```protobuf
message MsgSeenBtcChainTip {
  uint64 height = 1;
  string hash = 2;
  string btcOracleAddress = 3;
```

This message loops till there's 2/3rd attestation available.&#x20;