Module keys 

Ed25519 keypair bundle with post-quantum commitment

Keys packages together everything a client or server needs to sign messages and be identified on the network:

• the Ed25519 secret half (signature_key) used to sign,
• the Ed25519 public half in two forms (verification_key for verification, and the serialisable verification_key_bytes for wire/storage),
• and the 32-byte pq_commitment_bytes (Falcon + Dilithium commitments — see crate::tools::keys_post_quantum) that future-proofs the identity.

Construction paths:

• Keys::from_rnd — generate a fresh random keypair (optionally skipping the slow PQ commitment derivation for test scenarios).
• Keys::from_seed — deterministic derivation from a 32-byte seed; used internally and by tests that need reproducible keys.
• Keys::from_phrase — Argon2 stretch a user-supplied passphrase into a 32-byte seed, then derive keys from it. Passphrase-recoverable accounts.

Persistence:

• Keys::to_persistence / Keys::from_persistence encrypt the full keypair under a passphrase using ChaCha20Poly1305 for at-rest storage in the key locker.

Structs

Keys