Choose how your blocks get built.
Harmonic is configurable block building for Solana. Set your strategy, capture more upside, and earn the consistent performance that attracts and retains serious stake.
One slot, built your way.
Follow a block from the network's transactions to a slot on Solana, and see where the control, the uptime, and the revenue come from.
Transactions arrive at the Remote TPU.
Retail users and searchers send transactions to a Remote TPU, which aggregates the incoming flow and forwards it onward.
Every connected builder sees the same flow.
The Remote TPU forwards transactions to all connected block builders, so no builder is starved of order flow.
Each validator is bound to one builder.
Your blocks are built by a single bound builder. The binding is sticky: one validator, one live builder.
If the bound builder drops, a peer takes over.
A peer builder fails over seamlessly, and a fallback path keeps transactions flowing to the validator directly.
The built block reaches the network.
The block engine streams the constructed block to your validator, which executes it and broadcasts shreds to the Solana network.
Harmonic's core principle is validator autonomy. You have complete control over how your blocks are built, because Harmonic does not prescribe a path.
Pro-validator
You pick your own scheduling strategy and your own builder. The operator owns the decision, and the trade-offs that come with it.
Pro-network
Giving validators more control over block building creates a more competitive and resilient network.
Pro-retail
Fair inclusion, no artificial latency, and lower sandwich exposure for the people sending transactions.