feat(anvil): add PreStateTracer support for debug_traceTransaction #11709
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w1tcher
requested review from
DaniPopes,
mattsse,
grandizzy,
yash-atreya,
zerosnacks,
onbjerg and
0xrusowsky
as code owners
grandizzy
previously requested changes
Sep 18, 2025
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@w1tcher thank you! please rebase and add a test, here are some samples
foundry/crates/anvil/tests/it/traces.rs
Line 161 in 86d5c5b
mattsse
requested changes
Sep 18, 2025
|
@grandizzy I have added test cases. |
mattsse
previously approved these changes
Sep 23, 2025
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this is pretty neat
tysm for this.
while the actually replay+trace impl isnt super nice to read, it's fine imo
still something we can take another look at, but out of scope for this pr.
pending @grandizzy
Comment on lines
+2673
to
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| where | ||
| for<'a> I: Inspector<EthEvmContext<WrapDatabaseRef<&'a CacheDB<Box<&'a StateDb>>>>> | ||
| + Inspector<OpContext<WrapDatabaseRef<&'a CacheDB<Box<&'a StateDb>>>>> | ||
| + 'a, | ||
| for<'a> F: | ||
| FnOnce(ResultAndState<OpHaltReason>, CacheDB<Box<&'a StateDb>>, I, TxEnv, Env) -> T, |
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these are a bit horrific, but not much we can do here :D
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Motivation
This commit introduces support for the PreStateTracer in anvil's
debug_traceTransaction RPC method. With this change, users can now
obtain detailed pre-state information (accounts, storage, and balances)
when tracing transactions, enabling more advanced debugging and state
analysis workflows.
Solution
By storing the state changes generated during transaction execution in the exec_state variable, the PreStateTracer can later retrieve this data and return the relevant information.
PR Checklist