SpacetimeDB Rust Module Development

SpacetimeDB modules are WebAssembly applications that run inside the database. They define tables to store data and reducers to modify data. Clients connect directly to the database and execute application logic inside it.

Tested with: SpacetimeDB 2.0+ APIs

HALLUCINATED APIs — DO NOT USE

These APIs/patterns are incorrect. LLMs frequently hallucinate them.

Both macro forms are valid in 2.0: #[spacetimedb::table(...)] / #[table(...)] and #[spacetimedb::reducer] / #[reducer].

#[derive(Table)]                // Tables use #[table] attribute, not derive
#[derive(Reducer)]              // Reducers use #[reducer] attribute