Plugin Geyser

A Solana validator plugin interface (defined in solana-geyser-plugin-interface) that allows external processes to receive a real-time stream of every account update, transaction, slot status change, and block notification directly from the validator's internal processing pipeline via shared-memory callbacks, bypassing the RPC layer entirely. Geyser is the foundation for high-performance indexers, custom databases, and streaming infrastructure like Yellowstone gRPC, because it delivers data at validator speed with zero polling overhead.