WIP: Sketch out public Rust API for Multiplier

multiplier/src/lib.rs

@@ -1 +1,2 @@
+pub mod public;
 pub mod ffi;

multiplier/src/public.rs

@@ -0,0 +1,50 @@
+use ark_circom::{CircomBuilder, CircomConfig, CircomCircuit};
+use ark_std::rand::thread_rng;
+
+use ark_bn254::Bn254;
+use ark_groth16::generate_random_parameters;
+use ark_groth16::ProvingKey;
+
+
+pub struct Multiplier {
+    circom: CircomCircuit<Bn254>,
+    params: ProvingKey<Bn254>
+}
+
+impl Multiplier {
+    // TODO Break this apart here
+    pub fn new() -> Multiplier {
+        let cfg = CircomConfig::<Bn254>::new(
+            "./resources/circom2_multiplier2.wasm",
+            "./resources/circom2_multiplier2.r1cs",
+        ).unwrap();
+
+        let mut builder = CircomBuilder::new(cfg);
+        builder.push_input("a", 3);
+        builder.push_input("b", 11);
+
+        // create an empty instance for setting it up
+        let circom = builder.setup();
+
+        let mut rng = thread_rng();
+
+        let params = generate_random_parameters::<Bn254, _, _>(circom, &mut rng)
+            .unwrap();
+
+        let circom = builder.build().unwrap();
+
+        let inputs = circom.get_public_inputs().unwrap();
+
+        Multiplier { circom, params }
+    }
+
+    // TODO Return proof
+    pub fn prove() -> bool {
+        false
+    }
+
+    // TODO Return proof
+    pub fn verify() -> bool {
+        false
+    }
+}