If you use `ndk` there are different store options:
LRU -> https://nostr-dev-kit.github.io/ndk/cache/memory.html
SQLite/WASM -> https://nostr-dev-kit.github.io/ndk/cache/sqlite-wasm/INDEX.html]
Local Relay -> https://nostr-dev-kit.github.io/ndk/cache/nostr.html