As requests are submitted to Gelato Relay API, a network of Gelato Executors will execute and get the transactions mined as soon as they become executable (hence paying for gas fees). ECDSA signatures enforce the integrity of data whenever necessary, while gas fee refunds can be handled in any of our supported payment types. In this way, users and developers no longer have to become their own central point of failure with regards to their blockchain infrastructure, which may improve on the UX, costs, security and liveness of their Web3 systems.