Module types 

Public data types exchanged across the API boundary.

All four types in this module are thin wrappers around their underlying curve / scalar representation. They exist so that:

• the public API never leaks curve25519_dalek types directly, which would force every caller to take a dependency on the same version of that crate;
• every value has exactly one canonical byte and hex encoding;
• the type system stops you from accidentally passing, say, a KeyImage where a PublicKey is expected — they are both 32-byte Ristretto points, but they mean different things in the protocol.

Everything serialises to a fixed-size byte array (or a Vec<u8> for signatures whose size depends on the ring). The encoding is the curve25519-dalek canonical encoding for points (compressed Ristretto) and the little-endian canonical encoding for scalars.

Structs

KeyImage

The protocol’s “linking tag” — what the host stores to prevent double voting.

Nonce

A verifier-chosen nonce for an ownership proof (Operation D).

OwnershipProof

A proof of ownership of a KeyImage, produced by crate::prove_ownership and checked by crate::verify_ownership.

PublicKey

A voter’s public identity. Safe to publish.

SecretKey

A voter’s secret key.

Signature

A ring signature produced by crate::sign_vote.

VoteProof

The full bundle returned by crate::sign_vote: the proof and the linking tag.