CCIPLocalSimulatorFork v0.2.2 API Reference

If you use NPM, install the @chainlink/local NPM package:

npm install @chainlink/local@0.2.2

If you use Yarn, install the @chainlink/local NPM package:

yarn add @chainlink/local@0.2.2

If you use Foundry:

forge install smartcontractkit/chainlink-local@cd3bfb8c42716cfb791174314eba2c0d178551b9

and then set remappings to: @chainlink/local/=lib/chainlink-local/ in either remappings.txt or foundry.toml file

Import the CCIPLocalSimulator contract from the @chainlink/local package:

import {CCIPLocalSimulator} from "@chainlink/local@0.2.2/src/ccip/CCIPLocalSimulator.sol";

CCIPLocalSimulatorFork

A JavaScript module that provides utilities for simulating CCIP (Cross-Chain Interoperability Protocol) message routing in a local or forked environment.

CCIPLocalSimulatorFork

Types

Evm2EvmMessage

Represents a cross-chain message in the EVM-to-EVM communication protocol. Contains all necessary information for message routing and token transfers across chains.

Property	Type	Description
sourceChainSelector	`bigint`	The identifier of the source chain
sender	`string`	The address that sent the message
receiver	`string`	The address that will receive the message
sequenceNumber	`bigint`	The sequence number of the message
gasLimit	`bigint`	The gas limit for executing the message
strict	`boolean`	Whether the message requires strict execution
nonce	`bigint`	The nonce of the message
feeToken	`string`	The token used to pay fees
feeTokenAmount	`bigint`	The amount of fee token to be paid
data	`string`	The message payload data
tokenAmounts	`Array<{token: string, amount: bigint}>`	Array of tokens and amounts being transferred
sourceTokenData	`Array<string>`	Array of token-specific data from source chain
messageId	`string`	The unique identifier of the message

Functions

getEvm2EvmMessage

Extracts and parses a CCIP message from a transaction receipt by looking for the CCIPSendRequested event.

function getEvm2EvmMessage(receipt) => Evm2EvmMessage | null

Parameters

Parameter	Type	Description
receipt	`object`	The transaction receipt from the `ccipSend` call

Returns

Type	Description
`Evm2EvmMessage\|null`	The parsed EVM-to-EVM message if found in the receipt logs, or null if no relevant event found

requestLinkFromTheFaucet

Requests LINK tokens from a faucet contract for testing purposes.

async function requestLinkFromTheFaucet(linkAddress, to, amount) => Promise<string>

Parameters

Parameter	Type	Description
linkAddress	`string`	The address of the LINK contract on the current network
to	`string`	The address to send LINK to
amount	`bigint`	The amount of LINK to request

Returns

Type	Description
`Promise<string>`	Promise resolving to the transaction hash of the fund transfer

routeMessage

Routes a cross-chain message on the destination network by finding the appropriate off-ramp and executing the message.

async function routeMessage(routerAddress, evm2EvmMessage) => Promise<void>

Parameters

Parameter	Type	Description
routerAddress	`string`	Address of the destination Router
evm2EvmMessage	`Evm2EvmMessage`	Sent cross-chain message

Returns

Type	Description
`Promise<void>`	Resolves with no value if the message is successfully routed

CCIPLocalSimulatorFork v0.2.2 API Reference

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