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

# IPeripheryImmutableState

Functions that return immutable state of the router

## Functions

### factory

```solidity theme={null}
  function factory(
  ) external returns (address)
```

#### Return Values:

| Type    | Description                          |
| :------ | :----------------------------------- |
| address | the address of the Ramses V3 factory |

### WETH9

```solidity theme={null}
  function WETH9(
  ) external returns (address)
```

#### Return Values:

| Type    | Description          |
| :------ | :------------------- |
| address | the address of WETH9 |