Improving the Performance of Blockchain Sharding Protocols with Collaborative Transaction Verification

Sharding is a promising approach to scalable blockchains. While sharding eliminates duplicate work between shards, it does not remove intra-shard duplication, i.e., every peer has to verify all transactions in its shard, thus becoming a newly exposed bottleneck. Aiming to improve the performance of individual shards, we propose Collaborative Transaction Verification (CTV), which allows peers to ve...