Definition ∞ A proof serving node is a specialized participant in a blockchain network responsible for generating and providing cryptographic proofs, typically zero-knowledge proofs, to other network participants or light clients. These nodes perform computationally intensive tasks to attest to the validity of transactions or state transitions. They act as a service layer, enabling efficient and trust-minimized verification across the network. Their operation is critical for scalable blockchain architectures.
Context ∞ Proof serving nodes are becoming increasingly important in scaling solutions like ZK-rollups and other verifiable computation protocols. News frequently discusses the economic incentives and operational requirements for running these nodes, as they are central to the security and efficiency of such systems. The decentralization and reliability of proof serving node networks are key considerations for the long-term viability of layer-2 solutions.
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