Florian/wasm napi - #2893
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The 'wasm' backend is now the wasm32-wasip1-threads build of the same
kimchi-napi crate that powers the native backend, loaded via generated
@napi-rs/wasm-runtime loaders. Native and wasm share one TS conversion
layer and one JSOO FFI handoff (globalThis.__o1js_kimchi_ffi).
Removed: worker-spec.js pointer marshalling, worker-helpers.js,
fix-wasm-bindings-node.js, the WebAssembly.Memory Proxy hack, the
wbg_rayon worker bootstrapping, and the wasm-bindgen conversion layer
(conversion-{core,proof,oracles,verifier-index}.ts, srs.ts).
- node-backend.js: thin loader for kimchi_napi.wasi.cjs; sets
RAYON_NUM_THREADS before instantiation; noop thread pool
- web-backend.js: Option A — napi-wasm browser loader on the main
thread (single-threaded rayon until worker-hosted Option B lands,
see PLAN.md/STATE.md)
- crypto/bindings.ts: single napi conversion bundle, cached per module
- types now sourced from the generated kimchi_napi.wasi.d.cts
- build:wasm:* scripts rebuilt around napi build; JSOO postprocessing
no longer rewrites requires
- @napi-rs/wasm-runtime added as a runtime dependency
- deleted bindings.unit-test.ts (its Rust reference fns were
wasm-bindgen-only exports); gate-vector-napi.unit-test now also runs
against the wasm build
Validated: wasm+native builds from one crate produce byte-identical
circuit digests, poseidon output and SRS points; rayon threading works
under Node; tsc clean. Requires a JSOO artifact rebuild in CI —
previously compiled artifacts reference the removed kimchi_wasm.cjs.
See PLAN.md (design + implementation report), STATE.md (current
status + web options), AGENT_LOG.md (migration gotchas).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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