Have managed to reproduce the bug exactly, run cargo test -- --nocapture

.gitignore

@@ -8,3 +8,4 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+**/venv

src/protocols/aggsig/test.rs

@@ -25,8 +25,16 @@ mod tests {
     #[test]
     fn test_ed25519_one_party() {
         let message: [u8; 4] = [79, 77, 69, 82];
-        let party1_keys = KeyPair::create();
+        // let party1_keys = KeyPair::create();
+        let priv_str = "48ab347b2846f96b7bcd00bf985c52b83b92415c5c914bc1f3b09e186cf2b14f"; // Private Key
+
+        let mut priv_dec = decode(priv_str).unwrap();
+        priv_dec.reverse();
+        let priv_bn = BigInt::from_bytes(&priv_dec[..]);
+
+        let party1_keys = KeyPair::create_from_private_key(&priv_bn);
         let signature = Signature::sign_single(&message, &party1_keys);
+        println!("TESTTEST\n\n{:?}\n", party1_keys.public_key.bytes_compressed_to_big_int().to_hex());
         assert!(verify(&signature, &message, &party1_keys.public_key).is_ok());
     }
 

src/protocols/aggsig/test_pubkey_gen.py

@@ -0,0 +1,22 @@
+from nacl.encoding import HexEncoder
+from nacl.signing import SigningKey
+
+
+
+def main():
+    # Generate a new random signing key
+    signing_key = SigningKey('48ab347b2846f96b7bcd00bf985c52b83b92415c5c914bc1f3b09e186cf2b14f', encoder=HexEncoder)
+
+    # Sign a message with the signing key
+    signed_hex = signing_key.sign(b"Attack at Dawn", encoder=HexEncoder)
+
+    # Obtain the verify key for a given signing key
+    verify_key = signing_key.verify_key
+
+    # Serialize the verify key to send it to a third party
+    verify_key_hex = verify_key.encode(encoder=HexEncoder)
+    print(verify_key_hex)
+
+
+if __name__ == '__main__':
+    main()