Preconfirmation

Preconfirmations (preconfs) are commitments from validators or sequencers to include transactions in future blocks. Preconfs provide faster certainty than waiting for block inclusion. Example: Sequencer commits to including your transaction in next block. You know it will be included before block is published. Preconfs enable low-latency applications and better UX. They are being explored for Ethereum L1 and L2s. Understanding preconfs is important for latency-sensitive applications.

How Preconfirmations Work

Mechanics:

Commitment: Validator or sequencer signs commitment to include transaction.

Penalty: If commitment violated, signer is slashed or penalized.

Fast Response: User receives preconf in milliseconds.

Inclusion: Transaction included in committed block.

Preconfs provide fast, credible commitments.

Benefits

Advantages:

Low Latency: Near-instant transaction certainty.

Better UX: Improves user experience for interactive apps.

MEV Mitigation: Can reduce MEV by ordering transactions early.

Predictability: Users know execution price before finality.

Preconfs improve blockchain UX significantly.

Preconf Risks

Challenges:

Slashing Enforcement: Must enforce penalties for violations.

Centralization: Preconf providers can become centralized.

Partial Commitments: Preconfs don't guarantee finality.

Trust: Users must trust preconf providers.

Preconfs add trust assumptions.

Use Cases

Applications:

DeFi Trading: Fast confirmation for time-sensitive trades.

Gaming: Low-latency game actions.

Payments: Instant payment confirmation.

NFT Minting: Guarantee mint inclusion during high demand.

Preconfs suit latency-sensitive apps.

L2 Preconfs

Rollup implementation:

Sequencer Preconfs: Sequencers commit to transaction ordering.

Fast Finality: Instant soft finality before L1 posting.

UX Improvement: Better than waiting for L1 finality.

L2s are natural fit for preconfs.

Career Opportunities

Preconf roles:

Protocol Engineers earn $130,000-$320,000+.

MEV Researchers earn $140,000-$340,000+.

Infrastructure Engineers earn $120,000-$300,000+.

Best Practices

Using preconfs:

Check Penalties: Ensure penalty mechanisms are strong.

Monitor Violations: Track preconf violation rates.

Diversify Providers: Use multiple preconf providers.

The Future of Preconfirmations

Trends:

L1 Preconfs: Ethereum L1 preconf protocols.

L2 Adoption: More rollups offering preconfs.

Standardization: Industry standards for preconfs.

Commit to Fast Inclusion

Preconfirmations provide fast transaction certainty before finality. They improve UX and enable new applications. If you're interested in UX or infrastructure, explore infrastructure careers at sequencer teams.