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Solana Set to Launch Alpenglow Upgrade, Cutting Finality to 150ms

BullishHigh impact
SOLUSD$107.49 0.72%

The Solana (SOLUSD) network is set to launch its new consensus protocol, Alpenglow, on Mainnet-beta at around 10:50 PM on October 21. Developed by core developer Anza over 18 months, the upgrade replaces TowerBFT, the consensus system used since the network's genesis.

Alpenglow introduces major technical enhancements to increase network speed and efficiency. By removing Proof of History and moving voting off-chain, the protocol frees up block space for user transactions. Transaction finality will also drop from several seconds to about 150 milliseconds. Solana was trading at $107.50, up 0.73% for the day.

Anza previously completed migration tests on both devnet and testnet, alongside network simulations involving 1,500 nodes. Security testing included a bug bounty program exceeding 25,000 SOL. The upcoming migration on October 21 is expected to complete within a single slot.

Key points

  • Solana will launch its Alpenglow consensus upgrade on Mainnet-beta at around 10:50 PM on October 21.
  • The upgrade replaces TowerBFT, removing Proof of History and moving voting off-chain to free up block space.
  • Transaction finality will drop from several seconds down to approximately 150 milliseconds.
  • Developers tested Alpenglow across devnet, testnet, and 1,500-node simulations, supported by a 25,000 SOL bug bounty.

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Questions and answers

When will Solana launch the Alpenglow upgrade?

The Alpenglow consensus upgrade is scheduled to go live on Solana Mainnet-beta at around 10:50 PM on October 21.

How will Alpenglow affect Solana transaction speed?

Alpenglow will reduce transaction finality from several seconds to about 150 milliseconds and free up block space by moving voting off-chain.

What consensus protocol is Alpenglow replacing?

Alpenglow replaces TowerBFT, the consensus protocol Solana has used since its genesis.