vibed/quotesdb/.beans/quotesdb-yjpy--add-workers-rs-wasm-entry-point-to-api-binary.md

title	status	type	priority	created_at	updated_at
Add workers-rs WASM entry point to api binary	completed	feature	high	2026-03-10T23:32:07Z	2026-03-10T23:32:07Z

Goal

Enable cargo build --release --bin api --target wasm32-unknown-unknown so the api binary deploys as a Cloudflare Worker (see infra/worker.tf).

Changes Required

1. Cargo.toml

Add axum to [target.'cfg(target_arch = "wasm32")'.dependencies] with tokio disabled:

axum = { version = "0.8", default-features = false, features = ["json"] }

All axum types used in handlers (Router, Path, Query, State, Json, etc.) are available without the tokio feature.

2. src/bin/api/main.rs

• Wrap existing native code (mod handlers;, #[tokio::main] async fn main()) in #[cfg(not(target_arch = "wasm32"))]
• Add #[cfg(target_arch = "wasm32")] mod handlers; (no change to handlers themselves)
• Add #[event(fetch)] workers-rs entry point that:
  1. Gets D1 binding from env: env.d1("DB")
  2. Creates D1Repository::new(db) — see companion ticket for D1 implementation
  3. Calls repo.run_migrations()
  4. Wraps repo in Arc<dyn QuoteRepository + Send + Sync>
  5. Builds Axum router via existing handlers::router(repo)
  6. Converts worker::Request → http::Request<axum::body::Body> (method, uri, headers, body bytes)
  7. Calls router via tower_service::Service::call()
  8. Converts http::Response<axum::body::Body> → worker::Response (status, headers, body bytes)

tower_service is already a transitive dep of axum.

Dependencies

• Companion ticket for D1Repository implementation must be done first (or in parallel). D1Repository must have unsafe impl Send and unsafe impl Sync for the Arc<dyn ... + Send + Sync> wrapper to work.

Validation

cargo build --release --bin api --target wasm32-unknown-unknown
cargo build --release --bin api   # native must still work
cargo fmt && cargo check && cargo clippy && cargo test