> 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/extensions/eapps.md).

# EApps

## EApps

A universal aggregator for external contracts positions.

*External positions are consolidating into a single view contract. As more apps are connected, can be split into multiple mixing. Future-proof as can route to dedicated extensions, should the size of the contract become too big.*

### UnknownApplication

```solidity
error UnknownApplication(uint256 appType)
```

### constructor

```solidity
constructor(struct EAppsParams params) public
```

The different immutable addresses will result in different deployed addresses on different networks.

#### Parameters

| Name   | Type               | Description                                            |
| ------ | ------------------ | ------------------------------------------------------ |
| params | struct EAppsParams | Chain-specific addresses bundled into a single struct. |

### getAppTokenBalances

```solidity
function getAppTokenBalances(uint256 packedApplications) external returns (struct ExternalApp[])
```

Uses temporary storage to cache token prices, which can be used in MixinPoolValue. Requires delegatecall.

#### Parameters

| Name               | Type    | Description                                               |
| ------------------ | ------- | --------------------------------------------------------- |
| packedApplications | uint256 | The uint encoded bitmap flags of the active applications. |

#### Return Values

| Name | Type                  | Description |
| ---- | --------------------- | ----------- |
| \[0] | struct ExternalApp\[] |             |

### getUniV4TokenIds

```solidity
function getUniV4TokenIds() external view returns (uint256[] tokenIds)
```

Returns the pool's Uniswap V4 active liquidity positions.

#### Return Values

| Name     | Type       | Description                            |
| -------- | ---------- | -------------------------------------- |
| tokenIds | uint256\[] | Array of liquidity position token ids. |