Firestore for Rust

Library provides a simple API for Google Firestore based on the official gRPC API:

• Fluent high-level and strongly typed API, the only public API of this library;
• Create or update documents using Rust structures and Serde;
• Support for:
  • Querying/streaming docs/objects;
  • Listing documents/objects (stream_all follows the page tokens for you);
  • Listening changes from Firestore;
  • Transactions;
  • Aggregated queries: count, sum, avg;
  • Streaming batch writes with automatic throttling to stay under the Firestore write rate limits;
  • K-nearest neighbor (KNN) vector search with Euclidean, Cosine and Dot Product measures;
  • Query cursors and partition queries;
  • Collection group queries and listing collection IDs;
  • Server side document transforms: increment, array append/remove, server timestamp;
  • Update/delete preconditions;
  • Consistency selectors to read at a given time or inside a transaction;
  • Explaining queries;
  • Request tags to attribute Firestore usage;
• Full async based on Tokio runtime;
• Macros that help you use your structure fields as Firestore field paths;
• Implements own Serde serializer to Firestore protobuf values;
• Support for multiple database IDs;
• Support for extended datatypes:
  • Firestore timestamp as a FirestoreTimestamp type or with #[serde(with)] attributes (based on jiff);
  • Lat/Lng;
  • References;
  • Explicit nulls;
• Caching support for collections and documents:
  • In-memory cache;
  • Persistent cache;
• Works with the Firestore emulator through FIRESTORE_EMULATOR_HOST, no credentials needed;
• Google client based on gcloud-sdk library that automatically detects GCE environment or application default accounts for local development;