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L2-to-L1 Message Sending

IntermediateMessagingArbSys30 XP

Send a message from L2 to L1 using ArbSys

In this challenge, you'll learn how to send a message from Arbitrum (L2) to Ethereum (L1) using ArbSys.

Create a function called sendL2ToL1Message that:

Connects to the ArbSys precompile on Arbitrum Sepolia

Takes a message string as input

Converts the string to bytes

Sends the message to L1 using the appropriate ArbSys method

Returns the transaction receipt

JavaScript

        // This should send a message to L1 and return the receipt
        await sendL2ToL1Message("Hello from Arbitrum!")

Use the ethers.js library which is already imported for you

The ArbSys precompile is located at: 0x0000000000000000000000000000000000000064

For this exercise, you'll need to use a wallet with funds on Arbitrum Sepolia

The target L1 address can be any valid Ethereum address

Complete all the steps above to solve the challenge!

l2-to-l1-message.ts

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Ready to test your solution?

Complete the exercise and submit to check your results.