Overview
A relayer is an actor that forwards transactions or messages between chains and users, often paying gas. It abstracts network complexity and enables cross-chain operations. Relayers are common in bridges and meta-transactions.
How It Works
A relayer picks up signed messages or transactions and submits them on behalf of users, sometimes covering fees. In cross-chain systems, relayers move messages between chains. They are incentivized by fees.
Why It Matters
Relayers enable gasless and cross-chain experiences, reducing user friction. They are central to bridge architecture and account abstraction. Their trust assumptions affect security.
Related Concepts
Relayers relate to Bridges, Cross-Chain Messaging, and Gasless Transactions. They are part of the Messaging infrastructure.