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delayedInbox-l2msg Tutorial

(Note this can only be done in nitro stack, not in Arbitrum classic.)

delayedInbox-l2msg is a simple sample example that allows you to send a l2 msg without using sequencer way, this can be used when a sequencer censors your tx or when a sequencer is down.

The demo allows you to send an L2 message without having to use the L2 RPC (only using the L1 RPC). This demo has 2 parts; (1) one part will show how to send a normal L2 transaction using the delayed inbox, (2) another will show how to withdraw your funds back without the sequencer.

If the sequencer goes down when running the Withdraw Funds, you need to use our Arbitrum SDK to force include your tx to continue. (example here)

Config Environment Variables

Set the values shown in .env-sample as environmental variables. To copy it into a .env file:

cp .env-sample .env

(you'll still need to edit some variables, i.e., DEVNET_PRIVKEY)

Run Demo

Normal Transaction:

yarn normalTx

Withdraw Funds:

yarn withdrawFunds

Curious to see the output on the Arbitrum chain?

Once the script is successfully executed, you can go to the Arbitrum nitro block explorer, enter your L2 address, and see the corresponding transactions on the Arbitrum chain!