Alpenglow Proposal Tested, Solana Validators Discuss Trimming Block Finality Time!

Jakarta, Pintu News – The Solana validator community has begun voting on proposal SIMD-0326, otherwise known as the Alpenglow proposal. The proposal aims to replace the existing TowerBFT consensus mechanism with a faster, simpler, and more robust system.

Check out the full information in this article!

Alpenglow Proposal Introduction

The Alpenglow proposal was developed by Solana-focused research team Anza. It proposes the use of direct voting, signature aggregation, and Validator Admission Ticket (VAT) fees to cut bandwidth costs and make participation easier.

With this system, validators will exchange votes outside the chain, rather than inside the chain, with cryptographic proofs indicating consensus. The system is based on Votor, a lightweight voting protocol that can resolve blocks in one or two rounds depending on validator support.

Blocks can be certified in one round with a minimum of 80% approval or in a second round with a 60% threshold. This design reduces network load by eliminating heavy traffic and provides security guarantees not available in TowerBFT.

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Benefits and Resilience Model

Alpenglow adopts a “20+20” resilience model, which allows the network to remain operational even in the presence of 20% hostile validators and another 20% unresponsive ones. The proposal also introduces a flat fee of 1.6 Solana (SOL) per epoch that will be burned to keep pace with inflation, while maintaining economic barriers to participation.

Proponents of this proposal argue that by replacing direct voting transaction fees, validators’ operational costs can be reduced by around 20%. However, critics warn that this could raise entry barriers for smaller operators.

Future improvements include replacing Solana’s Turbine data propagation system with Rotor, a more efficient protocol that will require separate governance approval.

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Debate and Governance Process

Community sentiment is divided between optimism and caution regarding Alpenglow. Proponents emphasize how this proposal can speed up validator operations, reduce finality delays, and facilitate use cases such as high-frequency trading and gaming that require near-instant confirmation.

Testing, implementation, and economic effect risks were the main areas of concern. Some validators suggested a cascading VAT model with Solana-based stakes (SOL) sizes ranging from 0.5 to 5, while others questioned how off-chain voting would manage the Jito auction procedure without historical evidence and transaction expiry.

Voting took place from epoch 833 to 842, with participation requiring a two-thirds majority of Yes over No votes and a quorum threshold of 33%, including abstentions.

Conclusion

The outcome of the vote will determine whether Solana will proceed with one of its most ambitious consensus revisions to date. This decision will not only affect the future of the Solana network but also its potential use in applications that require fast response and high efficiency.

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Reference

• Crypto News. Solana Alpenglow Proposal to Bring Block Finality by 2025. Accessed on August 19, 2025
• Featured Image: DL News