When try, try, try again leads to out-of-order execution bugs

By Troy Sargent

Have you ever wondered how a rollup and its base chain—the chain that the rollup commits state checkpoints to—communicate and interact? How can a user with funds only on the base chain interact with contracts on the rollup?

In Arbitrum Nitro, one way to call a method on a contract deployed on the rollup from the base chain is by using retryable transactions (a.k.a. retryable tickets). While this feature enables these interactions, it does not come …

arbitrum base bugs call can contracts funds nitro order state try