> For the complete documentation index, see [llms.txt](https://clanker.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clanker.gitbook.io/documentation/references/core-contracts/v4/clankerhook/clankerhookstaticfee.md).

# ClankerHookStaticFee

The **ClankerHookStaticFee** hook inherits from the **ClankerHook** and is used to set a static fee for both the deployed token and the paired token. The fees are able to be different from each other and have a max of 30%.

The fee unit is in Uniswap BPS, where `1` = 1/100th of a basis point. A fee of 1% is represented by `10_000,` and a fee of 30% by `300_000`. 

The expected `PoolConfig.poolData` is in the form of:

```solidity
struct PoolStaticConfigVars {
    // the fee taken on the deployed token when it's the input token
    uint24 clankerFee; 
    // the fee taken on the paired token when it's the input token
    uint24 pairedFee;
}
```

These fees are not changeable post deployment.


---

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