# PeripheryImmutableState

Immutable state used by periphery contracts

### Functions[​](https://docs.uniswap.org/contracts/v3/reference/periphery/base/PeripheryImmutableState#functions) <a href="#functions" id="functions"></a>

#### constructor[​](https://docs.uniswap.org/contracts/v3/reference/periphery/base/PeripheryImmutableState#constructor) <a href="#constructor" id="constructor"></a>

```solidity
  function constructor(
    address _factory, address _WETH9
  ) internal

```