Relayer

A relayer is an entity or service that facilitates the communication and transmission of data between different blockchain networks or layers. In decentralized finance (DeFi) and cross-chain applications, relayers play a crucial role by submitting transactions on behalf of users, especially in systems where users may not have the native tokens required to pay for transaction fees.

For web3 developers, integrating relayer services can enhance user experience by abstracting the complexities of cross-chain interactions and gas fee management. Relayers can also aid in implementing meta-transactions, allowing users to interact with blockchain applications without directly holding cryptocurrency, thereby lowering the barrier to entry for new users. However, developers must ensure the security and reliability of relayer services to maintain trust within their applications.