Summary

Module feemarket has been calculating the base fee in begin block, imo it is inconvenient because apps won't immediately know the base fee of the current block, and need to maintain extra logic of feemarket like in tx tracing.

Proposed Feature

I would like to suggest to change the base fee calculation to end blocker and use the number in the next block, so apps can query and we don't need to maintains extra code of base fee computation.