Bug Report: Missing Event Emission in evmgov Handler

[Hellobloc]

Bug Report: Missing Event Emission in evmgov Handler

Location:

x/evmgov/keeper/keeper.go#L76-L85

Description:

The msgroute handler in cosmos-sdk always reinitializes a new EventManager inside the ctx copy. As a result, any events emitted within the handler are not reflected in the original ctx. This causes the emitted events to be lost at the top-level caller.

Impact:

Events are not properly propagated, leading to inconsistencies between on-chain state and off-chain tracking.

Wallets, exchanges, and other external systems relying on events may fail to detect or track state changes correctly.

Steps to Reproduce:

1. Execute a message that should emit an event in evmgov.
3. Observe that the expected event is missing from the final block events.

Expected Behavior:

Events emitted within the evmgov handler should be included in the top-level context’s EventManager, ensuring they are visible to off-chain consumers.

Suggested Fix:

Reference the implementation in gov and other Cosmos SDK modules. Ensure that the evmgov handler does not replace the original EventManager but instead correctly emits events into it.
https://github.com/cosmos/cosmos-sdk/blob/main/x/gov/abci.go#L189-L196

[Hellobloc]

@Danielkis97 @riemannulus

[riemannulus]

Thank you for the report. I will review it as soon as possible.

[Hellobloc]

Nice work, please communicate with me any questions.

By the way, if you finally confirm the problem, can you release a security announcement. for this. This has been very helpful in our research and is much appreciated.

And if you think this is the wrong issue, can you tell us exactly reason, which will help us to correct our own mistakes. Much thanks