> 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/interfaces/iextensionsmap.md).

# IExtensionsMap

## IExtensionsMap

### eApps

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

Returns the address of the applications extension contract.

### eNavView

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

Returns the address of the navigation view extension contract.

### eOracle

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

Returns the address of the oracle extension contract

### eUpgrade

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

Returns the address of the upgrade extension contract.

### eCrosschain

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

Returns the address of the cross-chain handler extension contract.

### eGmxCallback

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

Returns the address of the GMX v2 callback extension contract.

### wrappedNative

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

Returns the address of the wrapped native token.

*It is used for initializing it in the pool implementation immutable storage without passing it in the constructor.*

### getExtensionBySelector

```solidity
function getExtensionBySelector(bytes4 selector) external view returns (address extension, bool shouldDelegatecall)
```

Returns the map of an extension's selector.

*Stores all extensions selectors and addresses in its bytecode for gas efficiency.*

#### Parameters

| Name     | Type   | Description                         |
| -------- | ------ | ----------------------------------- |
| selector | bytes4 | Selector of the function signature. |

#### Return Values

| Name               | Type    | Description                                        |
| ------------------ | ------- | -------------------------------------------------- |
| extension          | address | Address of the target extensions.                  |
| shouldDelegatecall | bool    | Boolean if should maintain context of call or not. |