What is Quorum Store?
Quorum Store is a component of the Aptos blockchain that significantly improves consensus efficiency by introducing an intermediary phase between the mempool and consensus protocols. It is based on the Narwhal mempool protocol and is designed to separate data dissemination from consensus, which helps to remove the leader bottleneck and allows for higher throughput.
How Quorum Store Works
- Intermediary Phase: Instead of broadcasting transactions directly from the mempool to validators, transactions are first sent to Quorum Store.
- Batching: Quorum Store receives transactions from the mempool and orders them into batches based on gas fees.
- Broadcasting and Signing: These batches are then broadcasted to validators. Validators sign the batches and send them to other validators.
- Proof-of-Availability: Once a batch receives signatures from more than two-thirds of validators, Quorum Store creates a Proof-of-Availability, ensuring the batch's uniqueness and availability.
- Consensus: The consensus protocol then creates blocks using these certified batches from Quorum Store, rather than raw transactions from the mempool.
Key Benefits
- Improved Throughput: By decoupling data dissemination from metadata ordering, Quorum Store allows validators to disseminate data asynchronously and in parallel, which increases consensus throughput.
- Reduced Data Duplication: Raw transactions are only disseminated once (from the mempool to Quorum Store), and only batches are disseminated thereafter, reducing network load.
- Leader Bottleneck Removal: The system removes the traditional leader bottleneck in consensus, enabling more scalable and efficient block production23.
In summary: Quorum Store is a protocol upgrade on Aptos that optimizes how transactions are processed and ordered before reaching consensus, resulting in a more scalable and efficient blockchain network
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