Make traits public to allow PCC to use formatting traits

common/nymcoconut/src/lib.rs

@@ -48,7 +48,7 @@ pub mod proofs;
 pub mod scheme;
 #[cfg(test)]
 mod tests;
-mod traits;
+pub mod traits;
 mod utils;
 
 pub type Attribute = Scalar;

common/nymcoconut/src/proofs/mod.rs

@@ -29,7 +29,7 @@ use crate::error::{CoconutError, Result};
 use crate::scheme::setup::Parameters;
 use crate::scheme::VerificationKey;
 use crate::utils::{hash_g1, try_deserialize_scalar, try_deserialize_scalar_vec};
-use crate::{elgamal, Attribute, Bytable, ElGamalKeyPair};
+use crate::{elgamal, Attribute, ElGamalKeyPair};
 
 // as per the reference python implementation
 type ChallengeDigest = Sha256;

common/nymcoconut/src/scheme/verification.rs

@@ -73,6 +73,14 @@ impl ThetaCovid {
         bytes
     }
 
+    pub fn to_bytes_tuple(&self) -> ([u8; 96], [u8; 96], Vec<u8>) {
+        let blinded_message_bytes = self.blinded_message.to_affine().to_compressed();
+        let credential_bytes = self.credential.to_bytes();
+        let proof_bytes = self.pi_v.to_bytes();
+
+        (blinded_message_bytes, credential_bytes, proof_bytes)
+    }
+
     pub fn from_bytes(bytes: &[u8]) -> Result<ThetaCovid> {
         if bytes.len() < 192 {
             return Err(