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@bhartnett bhartnett commented Nov 20, 2025

This PR adds BAL tracking into the EVM which enables building block access lists after executing a block.

The BlockAccessListTracker type is added into the BaseVMState type. The tracking is disabled by default and can be enabled with a bool flag. For now I am leaving it disabled and will enable it in a future PR.

I thought about adding the tracker in the LedgerRef type but the bal tracker also needs to collect data in other locations such as when a precompile contract address is called and also when creating and committing call frames for pre and post execution system calls and so I opted to go with this approach. I also looked into using a static bool to switch between tracking enabled and disabled but it turns out that a static bool would require passing the parameter through many layers of code in many places and isn't ideal for maintainability.

I started running the BAL EEST tests against these changes locally and we are correctly building the majority of BALs. There are around 40 failures out of over 400 new test cases.

@bhartnett bhartnett marked this pull request as ready for review November 21, 2025 08:55
@bhartnett bhartnett requested a review from jangko November 21, 2025 09:06
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