[AIP-37][Filter duplicate transactions within a block]

[thepomeranian]

AIP Discussion

Motivation

With Quorum Store (see AIP-26), a block proposal may include duplicate transactions due to Quorum Store batches being opaque. (Duplicate transactions are also possible with byzantine proposers within quorum store.) Duplicate transactions cannot affect correctness of execution, i.e., the first version will always succeed and duplicates will be discarded. However, there is concern that duplicate transactions could affect the performance of parallel execution of blocks because they could induce conflicts. We propose filtering the duplicates before blocks are executed in the VM.

Read more about it here: https://github.com/aptos-foundation/AIPs/blob/main/aips/aip-37.md