Solvers forward messages between the SEDA Chain and external chains. External-to-SEDA chain messages contain newly created data requests. The solver pays the gas cost of the request computation upfront to prevent solvers from being able to spam or DDoS attack the SEDA Chain with non-existent data requests. As a result, the solver receives rewards for bridging the result back to the destination network. SEDA-to-external chain messages relay the SEDA Chain state and data request results. Due to the cryptographic proof supplied with this message, there's no way for the solver to corrupt or alter the data provided to the external chain.

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