Paid subscribers get an earlier view of committed transactions, while BAM validators and the Jito DAO share distribution revenue.

Solana traders can pay to see transactions earlier through BAM without gaining the right to change their order within a committed batch. The product turns information timing into a saleable service, even as its execution rules protect the sequence of an already scheduled batch.

BAM, Jito's Block Assembly Marketplace, streams transactions after a validator commits to executing them. That validator is the leader for a slot, its turn to build a block. The preconfirmation messages arrive before transactions are broken into shreds for network distribution. BAM's searcher documentation, updated Nov. 4, makes the distinction explicit: early visibility does not allow a subscriber to reorder or front-run that transaction within its batch.

Helius's current subscription terms and BAM's validator revenue rules show how that earlier view is priced and who earns from selling it.

A BAM preconfirmation appears only after the leader has accepted a scheduled batch and committed to executing it in order. Unscheduled pending transactions are excluded. The stream therefore reveals committed activity earlier than a shred-based feed, rather than opening a window to rearrange that same batch.

BAM says early testing with distribution partners measured a median, or p50, advantage of 5–10 milliseconds over their existing shred streams. That is an early-test result, not a guaranteed lead for every subscriber or transaction. Nor is the commitment finality: a leader can still skip its slot or land on a fork, so a preconfirmation describes what will execute if the block lands.

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