> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.

# PairProtocolCustomData

> Legacy protocol-specific custom data for a pair. Superseded by ProtocolData.

### TypeScript shape

```ts theme={null}
interface PairProtocolCustomData {
  uniswapV4HookAddress: string | null;
}
```

<ResponseField name="uniswapV4HookAddress" type="String">
  Address of the UniswapV4 hook contract attached to the pair, if any.
</ResponseField>