Jito is bringing a major upgrade to the way blocks get built on Solana, Lightspeed has learned exclusively.

Jito — whose validator client accounts for 87% of all Solana stake — will begin routing transactions through a piece of infrastructure it’s calling the block assembly marketplace, or BAM. Jito says BAM will limit toxic MEV, make Solana more suitable for perps exchanges and CLOBs, and let apps share revenue with users.

When a user transacts on Solana, chances are that the transaction will go through the Jito block engine, which is essentially an off-chain blockspace auction. The product is a cash cow: Blockworks Research data estimates Jito Labs made roughly $25 million…

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