Bindings Parity Matrix

Status

Draft. Authoritative live version: the parity matrix in the confium repo.

Motivation

Confium has bindings in 5 languages (Rust, Python, Ruby, WASM/TypeScript, Go, plus sibling-repo Ruby gem). Each binding has different coverage. The parity matrix documents which features are available where, so consumers know what to expect.

Scope

• Feature-by-feature per-language matrix
• Status: ✅ shipped / 🚧 in progress / ❌ out of scope
• Last-updated timestamp per row

Out of scope

• Performance benchmarks (separate doc)
• API ergonomic comparisons

The matrix (snapshot 2026-08-07)

[cols=“1,1,1,1,1,1,1”]

Feature	Rust	Python	Ruby	WASM	Node	Go
Composite verify (Ed25519)
✅	✅	✅	✅	✅	✅
Composite verify (ECDSA-P256)
✅	✅	✅	✅	❌	❌
Composite sign
✅	❌	❌	❌	❌	❌
Transparency inclusion proof verify
✅	✅	✅	✅	✅	✅
Transparency consistency proof verify
✅	✅	❌	❌	❌	❌
Cert parse
✅	✅	✅	✅	❌	❌
Cert chain verify
✅	✅	✅	✅	❌	❌
CMS SignedData parse
✅	✅	✅	✅	❌	❌
XMLDSig canonicalize
✅	✅	✅	✅	❌	❌
Threshold DKG (CMP20)
✅	❌	❌	❌	❌	❌
Threshold sign (CMP20)
✅	❌	❌	❌	❌	❌

Maintenance

• Update on every binding release.
• Auto-generate from per-language parity.yaml files (pending).
• Status icons: ** ✅ = shipped and tested ** 🚧 = implementation in progress ** ❌ = out of scope (will not ship in current scope)

Security considerations

N/A — this is a documentation spec.

References

• Live matrix: parity matrix
• Confium source: crates/confium-python, crates/confium-wasm, crates/confium-go, sibling repo confium-ruby