# IAuth2Step

Interface for the Auth2Step contract

## Functions

### acceptOwnership

Accept ownership transfer

```solidity
function acceptOwnership() external;
```

### transferOwnership

Wrapper function for backward compatibility with legacy code expecting transferOwnership

*This function exists to maintain compatibility with contracts that were built against the previous version of Auth where ownership transfer was named `transferOwnership` The new Auth implementation renamed this to `setOwner` to better reflect the two-step ownership transfer process. This wrapper ensures existing code like BaseVault continues to work without modification Previous version: <https://github.com/transmissions11/solmate/blob/89365b880c4f3c786bdd453d4b8e8fe410344a69/src/auth/Auth.sol> New version: <https://github.com/transmissions11/solmate/blob/eaa7041378f9a6c12f943de08a6c41b31a9870fc/src/auth/Auth.sol>*

```solidity
function transferOwnership(address newOwner) external;
```

**Parameters**

| Name       | Type      | Description                                        |
| ---------- | --------- | -------------------------------------------------- |
| `newOwner` | `address` | Address to start the ownership transfer process to |

## Events

### OwnershipTransferStarted

Emitted when ownership transfer is initiated

```solidity
event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
```

**Parameters**

| Name            | Type      | Description                                    |
| --------------- | --------- | ---------------------------------------------- |
| `previousOwner` | `address` | The current owner initiating the transfer      |
| `newOwner`      | `address` | The new owner who needs to accept the transfer |

## Errors

### Aera\_\_ZeroAddressAuthority

```solidity
error Aera__ZeroAddressAuthority();
```

### Aera\_\_Unauthorized

```solidity
error Aera__Unauthorized();
```


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