> For the complete documentation index, see [llms.txt](https://docs.rigoblock.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rigoblock.com/solidity-api-reference/protocol/core/immutable/mixinimmutables.md).

# MixinImmutables

## MixinImmutables

Immutables are not assigned a storage slot, can be safely added to this contract.

### InvalidAuthorityInput

```solidity
error InvalidAuthorityInput()
```

### InvalidExtensionsMapInput

```solidity
error InvalidExtensionsMapInput()
```

### authority

```solidity
address authority
```

Returns the address of the authority contract.

#### Return Values

| Name | Type | Description |
| ---- | ---- | ----------- |

### wrappedNative

```solidity
address wrappedNative
```

Returns the address of the WETH9 contract.

*Used to convert WETH balances to ETH without executing an oracle call.*

#### Return Values

| Name | Type | Description |
| ---- | ---- | ----------- |

### tokenJar

```solidity
address tokenJar
```

Returns the address of the Rigoblock token jar contract.

*Used to transfer protocol fees to the buy-back-and-burn contract.*

#### Return Values

| Name | Type | Description |
| ---- | ---- | ----------- |

### \_implementation

```solidity
address _implementation
```

### \_extensionsMap

```solidity
contract IExtensionsMap _extensionsMap
```

### constructor

```solidity
constructor(address _authority, address extensionsMap, address _tokenJar) internal
```

The ExtensionsMap interface is required to implement the expected methods as sanity check.