# BDK File Store This is a simple append-only flat file implementation of [`Persist`](`bdk_chain::keychain::persist::Persist`). The main structure is [`KeychainStore`](`crate::KeychainStore`), which can be used with [`bdk`]'s `Wallet` to persist wallet data into a flat file. [`bdk`]: https://docs.rs/bdk/latest [`bdk_chain`]: https://docs.rs/bdk_chain/latest