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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 only enabled at the amsterdam fork.

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 only 5 failures remaining out of over 400 new BAL 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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We are passing most of the hive tests:

Nov 28 16:39:49.343 INF simulation ethereum/eels/consume-rlp finished suites=1 tests=8028 failed=7
7 tests failed
Nov 28 16:44:45.905 INF simulation ethereum/eels/consume-engine finished suites=1 tests=8047 failed=7
7 tests failed

Only 7 failures out of over 8000 in each of the test suites.

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