1#![allow(non_snake_case)]
 2#![allow(clippy::assertions_on_result_states)]
 3
 4extern crate libspartan;
 5extern crate merlin;
 6extern crate rand;
 7
 8use ark_serialize::*;
 9use libspartan::parameters::poseidon_params;
10use libspartan::poseidon_transcript::PoseidonTranscript;
11use libspartan::{Instance, NIZKGens, NIZK};
12
13fn print(msg: &str) {
14  let star = "* ";
15  println!("{:indent$}{}{}", "", star, msg, indent = 2);
16}
17
18pub fn main() {
19  // the list of number of variables (and constraints) in an R1CS instance
20  let inst_sizes = vec![10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
21
22  println!("Profiler:: NIZK");
23  for &s in inst_sizes.iter() {
24    let num_vars = (2_usize).pow(s as u32);
25    let num_cons = num_vars;
26    let num_inputs = 10;
27
28    // produce a synthetic R1CSInstance
29    let (inst, vars, inputs) = Instance::produce_synthetic_r1cs(num_cons, num_vars, num_inputs);
30
31    // produce public generators
32    let gens = NIZKGens::new(num_cons, num_vars, num_inputs);
33
34    let params = poseidon_params();
35    // produce a proof of satisfiability
36    let mut prover_transcript = PoseidonTranscript::new(&params);
37    let proof = NIZK::prove(&inst, vars, &inputs, &gens, &mut prover_transcript);
38
39    let mut proof_encoded = Vec::new();
40    proof.serialize(&mut proof_encoded).unwrap();
41    let msg_proof_len = format!("NIZK::proof_compressed_len {:?}", proof_encoded.len());
42    print(&msg_proof_len);
43
44    // verify the proof of satisfiability
45    let mut verifier_transcript = PoseidonTranscript::new(&params);
46    assert!(proof
47      .verify(&inst, &inputs, &mut verifier_transcript, &gens)
48      .is_ok());
49
50    println!();
51  }
52}