# Solana Geyser Plugin Interface This crate enables a plugin to be added into the Solana Validator runtime to take actions at the time of account updates or block and transaction processing; for example, saving the account state to an external database. The plugin must implement the `GeyserPlugin` trait. Please see the details of the `geyser_plugin_interface.rs` for the interface definition. The plugin should produce a `cdylib` dynamic library, which must expose a `C` function `_create_plugin()` that instantiates the implementation of the interface. The https://github.com/solana-labs/solana-accountsdb-plugin-postgres repository provides an example of how to create a plugin which saves the accounts data into an external PostgreSQL database. More information about Solana is available in the [Solana documentation](https://docs.solana.com/). Still have questions? Ask us on [Stack Exchange](https://sola.na/sse)