Under Alpenglow's Votor mechanism on Solana, validators send BLS-signed vote messages directly off-chain rather than submitting votes as block transactions

From the articleSolana Activates Alpenglow on Mainnet, Swapping Out TowerBFT for a Faster Consensus Engine - UnchainedAlso in Solana Alpenglow Goes Live in 'Most Ambitious' Upgrade Since Ethereum's Merge - Decrypt, Solana's Alpenglow upgrade set to cut finality to 150ms