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@cyotee/boardgameio-crypto

v0.1.0

Published

Cryptographic primitives for boardgame.io games — mental poker (SRA), Merkle commitments, EC ElGamal, Feldman DKG, DLEQ, ECDSA, Paillier HE, Shamir SSS, snarkjs ZK helpers, the boardgame.io crypto plugin, and setup-flow helpers.

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Links

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Maintainers

cyoteecyotee

Keywords

Readme

@manamesh/boardgameio-crypto

Shared cryptographic primitives for ManaMesh's provably-fair P2P card games.

This is a leaf package — it has no dependencies on @manamesh/frontend or any other in-tree package, so it can be consumed freely without import cycles.

Consumers

  • @manamesh/frontend — War, Go Fish, OnePiece, Threshold Tally, Battleship game modules.
  • @manamesh/poker — mental-poker dealing + the EIP-712 settlement flow.

Entry points

| Import | Contents | |--------|----------| | @manamesh/boardgameio-crypto | Barrel: re-exports everything below | | @manamesh/boardgameio-crypto/mental-poker | SRA commutative encryption, commitment + shuffle proofs | | @manamesh/boardgameio-crypto/keychain | GPG-style public-key registry + admission policies | | @manamesh/boardgameio-crypto/plugin/crypto-plugin | boardgame.io crypto plugin | | @manamesh/boardgameio-crypto/merkle | Merkle-tree commitments (Battleship) | | @manamesh/boardgameio-crypto/ec-elgamal-exp, /feldman-dkg, /dleq | Threshold Tally primitives | | @manamesh/boardgameio-crypto/ecdsa, /secp256k1, /sha256, /stable-json | Signing + hashing helpers | | @manamesh/boardgameio-crypto/paillier | Paillier HE (HE Battleship) | | @manamesh/boardgameio-crypto/shamirs | Shamir secret sharing (ECIES-encrypted) | | @manamesh/boardgameio-crypto/zk, /snarkjs-range | snarkjs ZK helpers |

Agent / integration skill

Read before wiring crypto into a game:
.grok/skills/boardgameio-crypto/SKILL.md (also under .opencode/skills/boardgameio-crypto/).

Hard rules summarized there:

  1. Never put private keys in shared G or multiplayer move args — submit ciphertexts / peels only.
  2. Admit public keys via keychain (MENTAL_POKER_KEYCHAIN_POLICY for multi-party SRA).
  3. Bind encrypt sk → published pk on the client (prepareEncryptionLayer / requirePrivateKeyMatchesPublished).
  4. Keep game phases / INVALID_MOVE in the game package; crypto stays pure.

Test

yarn workspace @manamesh/boardgameio-crypto test

Note on type-checking

This code was authored under @manamesh/frontend, which ships via esbuild and never runs tsc. As a result the sources carry pre-existing latent strict-mode type issues (e.g. stable-json.ts strict-null, a BufferSource lib-version mismatch, a Groth16 duplicate re-export in the barrel) that were never enforced. No standalone typecheck script is wired here yet, to match that origin convention; cleaning up the latent type debt is tracked separately. Runtime correctness is covered by the Vitest suite.