chore: replace N_ASSETS with N_CURRENCIES

backend/README.md

@@ -50,7 +50,7 @@ cargo test --release -- --nocapture
 
 ### Generating and updating verifier contract for Backend
 
-The verifier contract in the backend were generated using a predefined set of parameters: `N_ASSETS = 2` and `N_BYTES=14`, as indicated [here](https://github.com/summa-dev/summa-solvency/blob/master/zk_prover/examples/gen_inclusion_verifier.rs#L21-L22).
+The verifier contract in the backend were generated using a predefined set of parameters: `N_CURRENCIES = 2` and `N_BYTES=14`, as indicated [here](https://github.com/summa-dev/summa-solvency/blob/master/zk_prover/examples/gen_inclusion_verifier.rs#L21-L22).
 If you intend to work with different parameters, you'll need to adjust these hard-coded values and then generate new verifier contract.
 
 The process described below assists in both generating the verifier and updating the Summa contract, which integrates the new verifier as constructors.

backend/examples/summa_solvency_flow.rs

@@ -15,7 +15,7 @@ use summa_backend::{
 };
 use summa_solvency::merkle_sum_tree::MerkleSumTree;
 
-const N_ASSETS: usize = 2;
+const N_CURRENCIES: usize = 2;
 const USER_INDEX: usize = 0;
 
 #[tokio::main]
@@ -109,7 +109,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     let leaf_hash = public_inputs[0];
     assert_eq!(
         leaf_hash,
-        leaf_hash_from_inputs::<N_ASSETS>(user_name.clone(), balances.clone())
+        leaf_hash_from_inputs::<N_CURRENCIES>(user_name.clone(), balances.clone())
     );
 
     // Get `mst_root` from contract. the `mst_root` is disptached by CEX with specific time `snapshot_time`.

backend/src/apis/mod.rs

@@ -7,17 +7,20 @@ use num_bigint::BigUint;
 use num_traits::Num;
 use summa_solvency::merkle_sum_tree::Entry;
 
-pub fn leaf_hash_from_inputs<const N_ASSETS: usize>(username: String, balances: Vec<String>) -> U256
+pub fn leaf_hash_from_inputs<const N_CURRENCIES: usize>(
+    username: String,
+    balances: Vec<String>,
+) -> U256
 where
-    [usize; N_ASSETS + 1]: Sized,
+    [usize; N_CURRENCIES + 1]: Sized,
 {
     // Convert balances to BigUint
     let balances: Vec<BigUint> = balances
         .iter()
         .map(|balance| BigUint::from_str_radix(balance, 10).unwrap())
         .collect();
 
-    let entry: Entry<N_ASSETS> = Entry::new(username, balances.try_into().unwrap()).unwrap();
+    let entry: Entry<N_CURRENCIES> = Entry::new(username, balances.try_into().unwrap()).unwrap();
 
     // Convert Fp to U256
     let hash_str = format!("{:?}", entry.compute_leaf().hash);

backend/src/apis/round.rs

@@ -38,35 +38,35 @@ impl MstInclusionProof {
     }
 }
 
-pub struct Snapshot<const LEVELS: usize, const N_ASSETS: usize, const N_BYTES: usize> {
-    pub mst: Box<dyn Tree<N_ASSETS, N_BYTES>>,
+pub struct Snapshot<const LEVELS: usize, const N_CURRENCIES: usize, const N_BYTES: usize> {
+    pub mst: Box<dyn Tree<N_CURRENCIES, N_BYTES>>,
     trusted_setup: SetupArtifacts,
 }
 
-pub struct Round<'a, const LEVELS: usize, const N_ASSETS: usize, const N_BYTES: usize> {
+pub struct Round<'a, const LEVELS: usize, const N_CURRENCIES: usize, const N_BYTES: usize> {
     timestamp: u64,
-    snapshot: Snapshot<LEVELS, N_ASSETS, N_BYTES>,
+    snapshot: Snapshot<LEVELS, N_CURRENCIES, N_BYTES>,
     signer: &'a SummaSigner,
 }
 
-impl<const LEVELS: usize, const N_ASSETS: usize, const N_BYTES: usize>
-    Round<'_, LEVELS, N_ASSETS, N_BYTES>
+impl<const LEVELS: usize, const N_CURRENCIES: usize, const N_BYTES: usize>
+    Round<'_, LEVELS, N_CURRENCIES, N_BYTES>
 where
-    [usize; N_ASSETS + 1]: Sized,
-    [usize; N_ASSETS + 2]: Sized,
+    [usize; N_CURRENCIES + 1]: Sized,
+    [usize; N_CURRENCIES + 2]: Sized,
 {
     pub fn new<'a>(
         signer: &'a SummaSigner,
-        mst: Box<dyn Tree<N_ASSETS, N_BYTES>>,
+        mst: Box<dyn Tree<N_CURRENCIES, N_BYTES>>,
         params_path: &str,
         timestamp: u64,
-    ) -> Result<Round<'a, LEVELS, N_ASSETS, N_BYTES>, Box<dyn Error>>
+    ) -> Result<Round<'a, LEVELS, N_CURRENCIES, N_BYTES>, Box<dyn Error>>
     where
-        [(); N_ASSETS + 2]: Sized,
+        [(); N_CURRENCIES + 2]: Sized,
     {
         Ok(Round {
             timestamp,
-            snapshot: Snapshot::<LEVELS, N_ASSETS, N_BYTES>::new(mst, params_path).unwrap(),
+            snapshot: Snapshot::<LEVELS, N_CURRENCIES, N_BYTES>::new(mst, params_path).unwrap(),
             signer: &signer,
         })
     }
@@ -114,7 +114,7 @@ where
         user_index: usize,
     ) -> Result<MstInclusionProof, &'static str>
     where
-        [(); N_ASSETS + 2]: Sized,
+        [(); N_CURRENCIES + 2]: Sized,
     {
         Ok(self
             .snapshot
@@ -123,17 +123,17 @@ where
     }
 }
 
-impl<const LEVELS: usize, const N_ASSETS: usize, const N_BYTES: usize>
-    Snapshot<LEVELS, N_ASSETS, N_BYTES>
+impl<const LEVELS: usize, const N_CURRENCIES: usize, const N_BYTES: usize>
+    Snapshot<LEVELS, N_CURRENCIES, N_BYTES>
 where
-    [usize; N_ASSETS + 1]: Sized,
-    [usize; N_ASSETS + 2]: Sized,
+    [usize; N_CURRENCIES + 1]: Sized,
+    [usize; N_CURRENCIES + 2]: Sized,
 {
     pub fn new(
-        mst: Box<dyn Tree<N_ASSETS, N_BYTES>>,
+        mst: Box<dyn Tree<N_CURRENCIES, N_BYTES>>,
         params_path: &str,
-    ) -> Result<Snapshot<LEVELS, N_ASSETS, N_BYTES>, Box<dyn std::error::Error>> {
-        let mst_inclusion_circuit = MstInclusionCircuit::<LEVELS, N_ASSETS, N_BYTES>::init_empty();
+    ) -> Result<Snapshot<LEVELS, N_CURRENCIES, N_BYTES>, Box<dyn std::error::Error>> {
+        let mst_inclusion_circuit = MstInclusionCircuit::<LEVELS, N_CURRENCIES, N_BYTES>::init_empty();
 
         // get k from ptau file name
         let parts: Vec<&str> = params_path.split("-").collect();
@@ -154,10 +154,10 @@ where
         user_index: usize,
     ) -> Result<MstInclusionProof, &'static str>
     where
-        [(); N_ASSETS + 2]: Sized,
+        [(); N_CURRENCIES + 2]: Sized,
     {
         let merkle_proof = self.mst.generate_proof(user_index).unwrap();
-        let circuit = MstInclusionCircuit::<LEVELS, N_ASSETS, N_BYTES>::init(merkle_proof);
+        let circuit = MstInclusionCircuit::<LEVELS, N_CURRENCIES, N_BYTES>::init(merkle_proof);
 
         // Currently, default manner of generating a inclusion proof for solidity-verifier.
         let calldata = gen_proof_solidity_calldata(