Add bin file to compile Circom circuit to spartan circuit

Cargo.toml

@@ -19,6 +19,12 @@ web-sys = { version = "0.3.60", features = ["console"] }
 serde_json = "1.0.89"
 libsecp256k1 = "0.7.1"
 num-bigint = "0.4.3"
+serde = "1.0.151"
+byteorder = "1.4.3"
+ff = "0.12.0"
+pasta_curves = "0.4.0"
+serde-wasm-bindgen = "0.4.5"
+
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
 nova-scotia = { git = "https://github.com/nalinbhardwaj/Nova-Scotia.git" }
@@ -31,3 +37,8 @@ wasm-bindgen-rayon = { version = "1.0"}
 
 [dependencies.getrandom]
 features = ["js"]
+
+
+[[bin]]
+name = "gen_spartan_inst"
+path = "src/bin/gen_spartan_inst.rs"

src/bin/gen_spartan_inst.rs

@@ -0,0 +1,18 @@
+use serde_json::json;
+use spartan_wasm::circuits::utils::load_as_spartan_inst;
+use std::env::current_dir;
+use std::fs::File;
+use std::io::Write;
+
+fn main() {
+    let root = current_dir().unwrap();
+    let circuit_file = root.join("circuits/build/poseidon/poseidon.r1cs");
+    let spartan_inst = load_as_spartan_inst(circuit_file, 0);
+    let spartan_inst_json = json!(spartan_inst);
+
+    let output_file = root.join("browser_benchmark/public/poseidon_circuit.json");
+    File::create(output_file)
+        .unwrap()
+        .write_all(spartan_inst_json.to_string().as_bytes())
+        .unwrap();
+}