# AggregatorInterface v0.2.4 API Reference
Source: https://docs.chain.link/chainlink-local/api-reference/v0.2.4/aggregator-interface

> For the complete documentation index, see [llms.txt](/llms.txt).

> **NOTE: Integrate Chainlink Local into your project**
>
> ### npm
>
> If you use [NPM](https://www.npmjs.com/), install the [@chainlink/local NPM
> package](https://www.npmjs.com/package/@chainlink/local):
>
> ```shell
> npm install @chainlink/local@0.2.4
> ```
>
> ### yarn
>
> If you use [Yarn](https://yarnpkg.com/), install the [@chainlink/local NPM
> package](https://www.npmjs.com/package/@chainlink/local):
>
> ```shell
> yarn add @chainlink/local@0.2.4
> ```
>
> ### foundry
>
> If you use [Foundry](https://book.getfoundry.sh/):
>
> ```shell
> forge install smartcontractkit/chainlink-local@v0.2.4
> ```
>
> and then set remappings to: `@chainlink/local/=lib/chainlink-local/` in either `remappings.txt` or `foundry.toml` file
>
> ### RemixIDE
>
> Import the `CCIPLocalSimulator` contract from the `@chainlink/local` package:
>
> ```solidity
> import {CCIPLocalSimulator} from "@chainlink/local@0.2.4/src/ccip/CCIPLocalSimulator.sol";
> ```

## AggregatorInterface

Basic price feed interface.

[AggregatorInterface](https://github.com/smartcontractkit/chainlink-local/blob/v0.2.4/src/data-feeds/interfaces/AggregatorInterface.sol)

## Events

### AnswerUpdated

```solidity
event AnswerUpdated(int256 current, uint256 roundId, uint256 updatedAt)
```

Emitted when the answer is updated.

#### Parameters

| Name      | Type    | Description                                      |
| --------- | ------- | ------------------------------------------------ |
| current   | int256  | - The updated answer.                            |
| roundId   | uint256 | - The round ID for which the answer was updated. |
| updatedAt | uint256 | - The timestamp when the answer was updated.     |

### NewRound

```solidity
event NewRound(uint256 roundId, address startedBy, uint256 startedAt)
```

Emitted when a new round is started.

#### Parameters

| Name      | Type    | Description                                          |
| --------- | ------- | ---------------------------------------------------- |
| roundId   | uint256 | - The round ID of the new round.                     |
| startedBy | address | - The address of the account that started the round. |
| startedAt | uint256 | - The timestamp when the round was started.          |

## Functions

### getAnswer

```solidity
function getAnswer(uint256 roundId) external view returns (int256)
```

Gets the answer for a specific round ID.

#### Parameters

| Name    | Type    | Description                           |
| ------- | ------- | ------------------------------------- |
| roundId | uint256 | - The round ID to get the answer for. |

#### Returns

| Name | Type   | Description                                 |
| ---- | ------ | ------------------------------------------- |
| \[0] | int256 | int256 - The answer for the given round ID. |

### getTimestamp

```solidity
function getTimestamp(uint256 roundId) external view returns (uint256)
```

Gets the timestamp for a specific round ID.

#### Parameters

| Name    | Type    | Description                              |
| ------- | ------- | ---------------------------------------- |
| roundId | uint256 | - The round ID to get the timestamp for. |

#### Returns

| Name | Type    | Description                                     |
| ---- | ------- | ----------------------------------------------- |
| \[0] | uint256 | uint256 - The timestamp for the given round ID. |

### latestAnswer

```solidity
function latestAnswer() external view returns (int256)
```

Gets the latest answer from the aggregator.

#### Returns

| Name | Type   | Description                 |
| ---- | ------ | --------------------------- |
| \[0] | int256 | int256 - The latest answer. |

### latestRound

```solidity
function latestRound() external view returns (uint256)
```

Gets the latest round ID from the aggregator.

#### Returns

| Name | Type    | Description                    |
| ---- | ------- | ------------------------------ |
| \[0] | uint256 | uint256 - The latest round ID. |

### latestTimestamp

```solidity
function latestTimestamp() external view returns (uint256)
```

Gets the timestamp of the latest answer from the aggregator.

#### Returns

| Name | Type    | Description                                   |
| ---- | ------- | --------------------------------------------- |
| \[0] | uint256 | uint256 - The timestamp of the latest answer. |