Relayer Nomination
How exclusive relayer nomination works and how to participate.
Relayer nomination grants a single relayer temporary exclusive rights to fulfill a specific deposit. The protocol assigns exclusivity through the exclusiveRelayer and exclusivityDeadline parameters at deposit creation, emitted via the V3FundsDeposited event.
The designated relayer maintains fill rights until the deadline on the destination chain. After expiration, any relayer may complete unfilled deposits.
Why Nomination?
Without nomination, relayers race to fill orders — creating collision risks and escalating gas price pressure. Exclusivity retains the speed gains that Across has unlocked for users while reducing uncertainty and risk for relayers.
Additional benefits include:
- Performance evaluation — the protocol can measure and score relayer reliability
- Order flow preferences — a pathway toward rewarding top-performing relayers
Participation Requirements
- Apply — submit a pull request to the Exclusive Relayer Configuration repository.
- Build a track record — new participants must demonstrate capability through step-in fills (completing deposits abandoned by other nominated relayers) and sub-10 second fill times on open order flow.
- Receive scores — selected relayers receive biweekly performance scores based on three metrics:
| Metric | Description |
|---|---|
| Completion Rate | Percentage of assigned fills successfully executed |
| Fill Speed | Transaction timing benchmarked against non-exclusive baseline |
| Step-in Fills | Ability to complete deposits abandoned by other nominated relayers |
Implementation Status
The system is rolling out incrementally across select Across API routes. Most frontend flow currently has assigned exclusive relayers. Third-party integrators are expected to implement relayer exclusivity during Q1-Q2 2025.