Jito’s Block Assembly Marketplace lets Helius subscribers see certain committed transactions before they are distributed through Solana’s shred-based feeds. BAM preconfirmations appear after the slot leader commits to executing a scheduled batch, without allowing subscribers to reorder the transactions within it. Early tests with distributors measured a median advantage of 5 to 10 milliseconds, although this is neither guaranteed nor equivalent to execution finality. Helius charges at least 300 credits per slot that delivers messages, while 35% of revenue goes to BAM validators, 35% to the Jito DAO and 30% to distributors. About 39.1% of network stake was running BAM on November 7, but coverage remains partial because of non-participating validators and reported gaps.
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