Signal from the source.
Pre-confirmations from the builder making the block. You see a transaction the moment it is selected, before it is ever packed into a shred.
A read from inside the block.
A Harmonic block builder decides what goes into a Harmonic validator's block, one transaction at a time. Those decisions have not yet been confirmed by the network. They are called pre-confirmations, and Preconfs publishes each one as it is made.
Everything else waits for shreds.
Shreds are the packets a block is broken into to cross the network. They only exist after the validator has executed the block. Every shred-based feed starts there. Preconfs starts the moment the Harmonic block builder chooses the contents of the block.
A faster feed does not help here.
Every provider optimizes how fast shreds reach you. None of it moves when the data comes into existence. That is a different layer, and it is the one Preconfs reads.
What you get.
- A gRPC stream
- Transactions as the builder selects them, streamed through the slot, not in a lump at the end.
- Filtered to your flow
- Subscribe to the flow that matters to you and receive only matching traffic.
- Coverage that scales
- The slots Harmonic builds, not every slot on Solana. As more stake runs Harmonic, more of the network is visible this early.
- Not a mempool
- A pre-confirmation is the builder's selection for the block being built. A decision already made, published as it is made, not a waiting room.
Preconfs is distributed through partners. Triton is the first.