Solana Alpenglow Upgrade Set for October 21 Mainnet Launch

TLDR Solana’s Alpenglow upgrade goes live on mainnet on October 21, starting with epoch 1064. The upgrade replaces TowerBFT and targets transaction finality of about 150 milliseconds, down from 12.8 seconds. Vote transactions will leave blocks, so headline transaction counts and TPS figures will drop sharply. Validators must pay a new 0.8 SOL per-epoch fee [...]

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