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 runtime 1.11.x, spacetimedb crate 1.1.x

HALLUCINATED APIs — DO NOT USE

These APIs DO NOT EXIST. LLMs frequently hallucinate them.

// WRONG — these macros/attributes don't exist
#[spacetimedb::table]           // Use #[table] after importing
#[spacetimedb::reducer]         // Use #[reducer] after importing
#[derive(Table)]                // Tables use #[table] attribute, not derive
#[derive(Reducer)]              // Reducers use #[reducer] attribute