1#![allow(non_snake_case)]
 2#![allow(clippy::assertions_on_result_states)]
 3
 4extern crate flate2;
 5extern crate libspartan;
 6extern crate merlin;
 7extern crate rand;
 8
 9use libspartan::{Instance, NIZKGens, NIZK};
10use merlin::Transcript;
11use ark_serialize::*;
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    // produce a proof of satisfiability
35    let mut prover_transcript = Transcript::new(b"nizk_example");
36    let proof = NIZK::prove(&inst, vars, &inputs, &gens, &mut prover_transcript);
37
38    let mut proof_encoded = Vec::new();
39    proof.serialize(&mut proof_encoded).unwrap();
40    let msg_proof_len = format!("NIZK::proof_compressed_len {:?}", proof_encoded.len());
41    print(&msg_proof_len);
42
43    // verify the proof of satisfiability
44    let mut verifier_transcript = Transcript::new(b"nizk_example");
45    assert!(proof
46      .verify(&inst, &inputs, &mut verifier_transcript, &gens)
47      .is_ok());
48
49    println!();
50  }
51}