# Chainlink Local v0.2.3 API Reference
Source: https://docs.chain.link/chainlink-local/api-reference/v0.2.3

> 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@0.2.3
> ```
>
> ### 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@0.2.3
> ```
>
> ### foundry
>
> If you use [Foundry](https://book.getfoundry.sh/):
>
> ```shell
> forge install smartcontractkit/chainlink-local@7d8b2f888e1f10c8841ccd9e0f4af0f5baf11dab
> ```
>
> 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@0.2.3/src/ccip/CCIPLocalSimulator.sol";
> ```

## CCIP

These contracts provide Cross-Chain Interoperability Protocol (CCIP) functionality in a local testing environment:

- [CCIPLocalSimulator](/chainlink-local/api-reference/v0.2.3/ccip-local-simulator) - Local CCIP message routing simulator
- [CCIPLocalSimulatorFork](/chainlink-local/api-reference/v0.2.3/ccip-local-simulator-fork) - CCIP simulator for forked networks
- [CCIPLocalSimulatorFork JS](/chainlink-local/api-reference/v0.2.3/ccip-local-simulator-fork-js) - JavaScript utilities for CCIP simulation
- [Register](/chainlink-local/api-reference/v0.2.3/register) - CCIP network configuration registry

## Data Feeds

Contracts for simulating Chainlink Data Feeds:

- [AggregatorInterface](/chainlink-local/api-reference/v0.2.3/aggregator-interface) - Basic price feed interface
- [AggregatorV2V3Interface](/chainlink-local/api-reference/v0.2.3/aggregator-v2-v3-interface) - Combined V2/V3 price feed interface
- [AggregatorV3Interface](/chainlink-local/api-reference/v0.2.3/aggregator-v3-interface) - Extended price feed interface
- [MockOffchainAggregator](/chainlink-local/api-reference/v0.2.3/mock-offchain-aggregator) - Mock implementation of off-chain aggregator
- [MockV3Aggregator](/chainlink-local/api-reference/v0.2.3/mock-v3-aggregator) - Mock implementation of V3 aggregator

## Token Contracts

Standard token implementations for testing:

- [BurnMintERC677Helper](/chainlink-local/api-reference/v0.2.3/burn-mint-erc677-helper) - Helper contract for ERC677 token operations
- [LinkToken](/chainlink-local/api-reference/v0.2.3/link-token) - LINK token implementation
- [WETH9](/chainlink-local/api-reference/v0.2.3/weth9) - Wrapped Ether implementation