test(rln): end to end test wip

rln/src/lib.rs

@@ -7,6 +7,9 @@ pub mod public;
 use ark_bn254::{Fr, Parameters};
 use ark_ec::bn::Bn;
 
+pub mod protocol;
+pub mod circuit;
+
 pub type Field = Fr;
 pub type Groth16Proof = ark_groth16::Proof<Bn<Parameters>>;
 pub type EthereumGroth16Proof = ark_circom::ethereum::Proof;
@@ -20,7 +23,8 @@ mod test {
     use super::*;
     use hex_literal::hex;
     use num_bigint::BigInt;
-    use semaphore::{hash::Hash, identity::Identity, poseidon_tree::PoseidonTree, protocol::*};
+    use semaphore::{hash::Hash, identity::Identity, poseidon_tree::PoseidonTree};
+    use crate::protocol::*;
 
     #[test]
     fn test_merkle_proof() {
@@ -36,23 +40,56 @@ mod test {
         tree.set(0, id.commitment().into());
 
         let merkle_proof = tree.proof(0).expect("proof should exist");
-        let root: Hash = tree.root().into();
+        let root: Field = tree.root().into();
+
+        println!("Root: {:#}", root);
+        println!("Merkle proof: {:#?}", merkle_proof);
+    }
+
+    #[ignore]
+    #[test]
+    fn test_end_to_end() {
+        const LEAF: Hash = Hash::from_bytes_be(hex!(
+            "0000000000000000000000000000000000000000000000000000000000000000"
+        ));
+
+        // generate identity
+        let id = Identity::new(b"hello");
+
+        // generate merkle tree
+        let mut tree = PoseidonTree::new(21, LEAF);
+        tree.set(0, id.commitment().into());
+
+        let merkle_proof = tree.proof(0).expect("proof should exist");
+        let root = tree.root().into();
 
         println!("Root: {:#}", root);
         println!("Merkle proof: {:#?}", merkle_proof);
 
-        // TODO Expand this test to cover RLN end to end
+        // change signal and external_nullifier here
+        let signal = b"xxx";
+        let external_nullifier = b"appId";
 
-        // // change signal and external_nullifier here
-        // let signal = b"xxx";
-        // let external_nullifier = b"appId";
+        let external_nullifier_hash = hash_external_nullifier(external_nullifier);
+        let nullifier_hash = generate_nullifier_hash(&id, external_nullifier_hash);
 
-        // let external_nullifier_hash = hash_external_nullifier(external_nullifier);
-        // let nullifier_hash = generate_nullifier_hash(&id, external_nullifier_hash);
+        let proof = generate_proof(&id, &merkle_proof, external_nullifier, signal).unwrap();
 
-        // let proof = generate_proof(&id, &merkle_proof, external_nullifier, signal).unwrap();
+        println!("Proof: {:#?}", proof);
 
-        // let success =
-        //     verify_proof(root, nullifier_hash, signal, external_nullifier, &proof).unwrap();
+        // TODO Make this test pass
+        //
+        // Currently fails at:
+        // thread 'test::test_end_to_end' panicked at 'called `Result::unwrap()`
+        // on an `Err` value: SynthesisError(MalformedVerifyingKey)',
+        // rln/src/lib.rs:62:84
+        //
+        // Not sure why this is MalformedVerifyingKey, though the proof is
+        // likely incorrect with wrong fields in protocol.rs
+        //
+        // Indeed:
+        // if (public_inputs.len() + 1) != pvk.vk.gamma_abc_g1.len() {
+        let success =
+            verify_proof(root, nullifier_hash, signal, external_nullifier, &proof).unwrap();
     }
 }