> 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/contracts/protocol/core/immutables.md).

# immutables

## MixinImmutables

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

### authority

```solidity
address authority
```

Returns the address of the authority contract.

#### Return Values

### \_implementation

```solidity
address _implementation
```

### constructor

```solidity
constructor(address newAuthority) internal
```