refactor(): Miscellaneous improvements from the Veridise audit

Author: Xearty

beacon-light-client/plonky2/crates/circuits/src/deposit_accumulator_balance_aggregator_diva/inner_level.rs

@@ -18,7 +18,7 @@ use plonky2::{
 use plonky2_crypto::biguint::CircuitBuilderBiguint;
 
 use super::first_level::{
-    DivaAccumulatedDataTarget, DepositAccumulatorBalanceAggregatorDivaFirstLevel,
+    DepositAccumulatorBalanceAggregatorDivaFirstLevel, DivaAccumulatedDataTarget,
 };
 
 pub struct DepositAccumulatorBalanceAggregatorDivaInnerLevel;
@@ -38,7 +38,7 @@ impl Circuit for DepositAccumulatorBalanceAggregatorDivaInnerLevel {
     fn define(
         builder: &mut CircuitBuilder<Self::F, D>,
         circuit_data: &Self::Params,
-    ) -> Self::Target where {
+    ) -> Self::Target {
         let proof1 = verify_proof(builder, &circuit_data);
         let proof2 = verify_proof(builder, &circuit_data);
 

beacon-light-client/plonky2/crates/circuits/src/deposits_accumulator_balance_aggregator/first_level.rs

@@ -896,7 +896,7 @@ mod test {
         pw.set_proof_with_pis_target(&targets.bls_verification_proof, &bls_proof);
 
         let s = Instant::now();
-        let proof = circuit.prove(pw).unwrap();
+        let _proof = circuit.prove(pw).unwrap();
         println!("Proof generated in {:?}", s.elapsed());
     }
 }

beacon-light-client/plonky2/crates/circuits/src/utils/circuit/hashing/merkle/sha256.rs

@@ -102,8 +102,7 @@ pub fn assert_merkle_proof_is_valid_const_sha256<
     gindex: u64,
 ) {
     let is_valid = validate_merkle_proof_const_sha256(builder, leaf, root, branch, gindex);
-    let _true = builder._true();
-    builder.connect(is_valid.target, _true.target);
+    builder.assert_true(is_valid);
 }
 
 pub fn hash_tree_root_sha256<F: RichField + Extendable<D>, const D: usize>(

beacon-light-client/solidity/contracts/balance_verifier/BalanceVerifier.sol

@@ -44,7 +44,6 @@ abstract contract BalanceVerifier is Ownable, IBalanceVerifier {
     bytes calldata proof,
     uint256[] memory publicInputs
   ) internal {
-    // Make the call using `address(this).call`
     (bool success, bytes memory returnData) = verifier.call(
       // Encode the call to the `verify` function with the public inputs
       abi.encodeWithSelector(PlonkVerifier.Verify.selector, proof, publicInputs)