Function verify_ed25519 

pub fn verify_ed25519(ltpk: &[u8; 32], msg: &[u8], sig: &[u8; 64]) -> Result<()>

Verify an Ed25519 sig over msg against a 32-byte public key ltpk.

Uses ed25519-dalek’s strict verification (rejecting small-order / non-canonical public keys).

Errors

Returns CryptoError::Signature if ltpk is not a valid Ed25519 public key or if the signature does not verify over msg.