More revenue. You choose how.
Harmonic is a drop-in client for your Solana validator. It earns more from every block and lets you decide how that block is built, without giving up a single fee or tip.
Why does Harmonic earn more?
A block can be worth more than a default ordering captures. Harmonic helps validators realize more of that value through configurable block-building strategies, efficient infrastructure, and by not taking a cut.
Higher throughput, no rate limits
Every client draws from the same pool of transactions available to the leader. A standard client rate-limits how much it takes in. Harmonic takes it all in and processes far more, so more of that flow makes it into the block.
A purpose-built block engine
Low-level engineering pays off here. The engine packs more of the block, tighter, into every slot, assembling sequenced microbatches at high cadence. It captures the value a block actually holds.
Every fee and tip stays yours
A standard client hands a cut of each block to middlemen. Harmonic keeps it. The value it captures is not shared out to a relay or an operator. It lands with you, in full.
You choose how it's ordered.
That ordering is a choice, and on Harmonic it's yours. The same transactions arrive; the rule you pick decides the block. Scroll to see one set of transactions ordered three different ways.
Order by what they pay.
Highest fees and tips land first. This is FBA, a frequent batch auction.
Or by when they arrived.
Strict arrival order, no priority for fees. This is FIFO, first in, first out.
Or optimize for revenue.
The whole block, ordered for the largest total reward. The exact ordering is proprietary. This is MREV, maximum revenue.
Revenue, never at the network's expense.
More revenue does not mean predatory revenue. Every Harmonic builder runs under the same hard limits: your users' trades pass through untouched, no matter how the block is ordered.
No sandwiching
No strategy inserts transactions around a user's trade to skim the price move.
No censorship
Valid transactions are eligible for inclusion, regardless of content or origin.
No malicious MEV
Harmonic operates by strict red lines.
Four ways to order a block.
Each strategy trades cadence, ordering, and revenue differently. Pick one to see how it sequences a block and what it earns. You set it with one flag in your validator client, and change it any time.
Neutralizes sub-millisecond latency races while still letting fees drive order. The highest-revenue SFDP-compliant option.
Drop it into the setup you already run.
Harmonic ships as Samba, a Firedancer fork, or Salsa, an Agave fork. Pick the one that matches your client, set your strategy flag, and restart. No new infrastructure, no change to how you operate.