l2-block-verification-in-assertion

L2 block verification in assertion

This tutorial shows how to verify whether an L2 block has been processed as part of an RBlock assertion on L1.

It uses the Rollup contract to find the latest confirmed (or created if configured in the script) RBlock/node, find the event that created it, and get the latest processed L2 block hash that's part of the assertion of that RBlock/node.

Then it checks whether the block number passed as argument was created before the latest L2 block hash processed.

See ./exec.js for inline explanations.

Run script:

yarn run exec {l2_block_number}

Configure environment variables

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

cp .env-sample .env

You can also use an .env file at the root of the monorepo.