> For the complete documentation index, see [llms.txt](https://the-artist-xchange.gitbook.io/the-artist-xchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-artist-xchange.gitbook.io/the-artist-xchange/docs/twrouter.md).

# TWRouter

## Methods

### addExtension

```solidity
function addExtension(string _extensionName) external nonpayable
```

*Adds a new extension to the router.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

### defaultExtensionSet

```solidity
function defaultExtensionSet() external view returns (address)
```

The DefaultExtensionSet that stores default extensions of the router.

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | address | undefined   |

### extensionRegistry

```solidity
function extensionRegistry() external view returns (address)
```

The ExtensionRegistry that stores all latest, vetted extensions available to router.

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | address | undefined   |

### getAllExtensions

```solidity
function getAllExtensions() external view returns (struct IExtension.Extension[] allExtensions)
```

Returns all extensions stored. Override default lugins stored in router are given precedence over default extensions in DefaultExtensionSet.

#### Returns

| Name          | Type                    | Description |
| ------------- | ----------------------- | ----------- |
| allExtensions | IExtension.Extension\[] | undefined   |

### getAllFunctionsOfExtension

```solidity
function getAllFunctionsOfExtension(string _extensionName) external view returns (struct IExtension.ExtensionFunction[])
```

*Returns all functions that belong to the given extension contract.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

#### Returns

| Name | Type                            | Description |
| ---- | ------------------------------- | ----------- |
| \_0  | IExtension.ExtensionFunction\[] | undefined   |

### getExtension

```solidity
function getExtension(string _extensionName) external view returns (struct IExtension.Extension)
```

*Returns the extension metadata and functions for a given extension.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

#### Returns

| Name | Type                 | Description |
| ---- | -------------------- | ----------- |
| \_0  | IExtension.Extension | undefined   |

### getExtensionForFunction

```solidity
function getExtensionForFunction(bytes4 _functionSelector) external view returns (struct IExtension.ExtensionMetadata)
```

*Returns the Extension metadata for a given function.*

#### Parameters

| Name               | Type   | Description |
| ------------------ | ------ | ----------- |
| \_functionSelector | bytes4 | undefined   |

#### Returns

| Name | Type                         | Description |
| ---- | ---------------------------- | ----------- |
| \_0  | IExtension.ExtensionMetadata | undefined   |

### getExtensionImplementation

```solidity
function getExtensionImplementation(string _extensionName) external view returns (address)
```

*Returns the extension's implementation smart contract address.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | address | undefined   |

### getImplementationForFunction

```solidity
function getImplementationForFunction(bytes4 _functionSelector) external view returns (address extensionAddress)
```

*Returns the extension implementation address stored in router, for the given function.*

#### Parameters

| Name               | Type   | Description |
| ------------------ | ------ | ----------- |
| \_functionSelector | bytes4 | undefined   |

#### Returns

| Name             | Type    | Description |
| ---------------- | ------- | ----------- |
| extensionAddress | address | undefined   |

### multicall

```solidity
function multicall(bytes[] data) external nonpayable returns (bytes[] results)
```

Receives and executes a batch of function calls on this contract.

*Receives and executes a batch of function calls on this contract.*

#### Parameters

| Name | Type     | Description                                                          |
| ---- | -------- | -------------------------------------------------------------------- |
| data | bytes\[] | The bytes data that makes up the batch of function calls to execute. |

#### Returns

| Name    | Type     | Description                                                                      |
| ------- | -------- | -------------------------------------------------------------------------------- |
| results | bytes\[] | The bytes data that makes up the result of the batch of function calls executed. |

### removeExtension

```solidity
function removeExtension(string _extensionName) external nonpayable
```

*Removes an existing extension from the router.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

### updateExtension

```solidity
function updateExtension(string _extensionName) external nonpayable
```

*Updates an existing extension in the router, or overrides a default extension.*

#### Parameters

| Name            | Type   | Description |
| --------------- | ------ | ----------- |
| \_extensionName | string | undefined   |

## Events

### ExtensionAdded

```solidity
event ExtensionAdded(address indexed extensionAddress, bytes4 indexed functionSelector, string functionSignature)
```

#### Parameters

| Name                       | Type    | Description |
| -------------------------- | ------- | ----------- |
| extensionAddress `indexed` | address | undefined   |
| functionSelector `indexed` | bytes4  | undefined   |
| functionSignature          | string  | undefined   |

### ExtensionRemoved

```solidity
event ExtensionRemoved(address indexed extensionAddress, bytes4 indexed functionSelector, string functionSignature)
```

#### Parameters

| Name                       | Type    | Description |
| -------------------------- | ------- | ----------- |
| extensionAddress `indexed` | address | undefined   |
| functionSelector `indexed` | bytes4  | undefined   |
| functionSignature          | string  | undefined   |

### ExtensionUpdated

```solidity
event ExtensionUpdated(address indexed oldExtensionAddress, address indexed newExtensionAddress, bytes4 indexed functionSelector, string functionSignature)
```

#### Parameters

| Name                          | Type    | Description |
| ----------------------------- | ------- | ----------- |
| oldExtensionAddress `indexed` | address | undefined   |
| newExtensionAddress `indexed` | address | undefined   |
| functionSelector `indexed`    | bytes4  | undefined   |
| functionSignature             | string  | undefined   |