Validator used logs

common/credentials/src/coconut/utils.rs

@@ -43,6 +43,7 @@ use crate::error::Error;
 pub async fn obtain_aggregate_verification_key(
     validators: &[Url],
 ) -> Result<VerificationKey, Error> {
+    println!("Aggregating from {:?}", validators);
     if validators.is_empty() {
         return Err(Error::NoValidatorsAvailable);
     }
@@ -54,6 +55,7 @@ pub async fn obtain_aggregate_verification_key(
     for (id, validator_url) in validators.iter().enumerate() {
         client.change_validator_api(validator_url.clone());
         let response = client.get_coconut_verification_key().await?;
+        println!("Validator {} with id {}", validator_url, id + 1);
         indices.push((id + 1) as u64);
         shares.push(response.key);
     }

common/nymcoconut/src/scheme/verification.rs

@@ -221,10 +221,12 @@ pub fn verify_credential(
     if public_attributes.len() + theta.pi_v.private_attributes_len()
         > verification_key.beta_g2.len()
     {
+        println!("Length check");
         return false;
     }
 
     if !theta.verify_proof(params, verification_key) {
+        println!("Proof check");
         return false;
     }
 
@@ -245,12 +247,18 @@ pub fn verify_credential(
         theta.blinded_message + signed_public_attributes
     };
 
-    check_bilinear_pairing(
+    let ret = check_bilinear_pairing(
         &theta.credential.0.to_affine(),
         &G2Prepared::from(kappa.to_affine()),
         &(theta.credential.1).to_affine(),
         params.prepared_miller_g2(),
-    ) && !bool::from(theta.credential.0.is_identity())
+    );
+    if !ret {
+        println!("Bilinear check");
+    } else {
+        println!("Identity check");
+    }
+    ret && !bool::from(theta.credential.0.is_identity())
 }
 
 // Used in tests only

gateway/src/node/client_handling/websocket/connection_handler/coconut.rs

@@ -5,7 +5,7 @@ use std::time::{Duration, SystemTime};
 
 use log::*;
 
-use coconut_interface::{Credential, VerificationKey};
+use coconut_interface::{Base58, Credential, VerificationKey};
 use validator_client::{
     nymd::{
         cosmwasm_client::logs::find_attribute,
@@ -40,6 +40,7 @@ impl CoconutVerifier {
                 needed: 1,
             });
         }
+        println!("Using VK {}", aggregated_verification_key.to_bs58());
         Ok(CoconutVerifier {
             api_clients,
             nymd_client,