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#![allow(non_snake_case)]
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extern crate flate2;
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extern crate libspartan;
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extern crate merlin;
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extern crate rand;
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use flate2::{write::ZlibEncoder, Compression};
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use libspartan::r1csinstance::R1CSInstance;
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use libspartan::spartan::{SNARKGens, SNARK};
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use libspartan::timer::Timer;
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use merlin::Transcript;
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pub fn main() {
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// the list of number of variables (and constraints) in an R1CS instance
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let inst_sizes = vec![10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
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println!("Profiler:: SNARK");
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for &s in inst_sizes.iter() {
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let num_vars = (2 as usize).pow(s as u32);
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let num_cons = num_vars;
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let num_inputs = 10;
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let (inst, vars, input) = R1CSInstance::produce_synthetic_r1cs(num_cons, num_vars, num_inputs);
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Timer::print(&format!("number_of_constraints {}", num_cons));
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// produce public generators
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let gens = SNARKGens::new(&inst.size());
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// create a commitment to R1CSInstance
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let timer_encode = Timer::new("SNARK::encode");
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let (comm, decomm) = SNARK::encode(&inst, &gens);
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timer_encode.stop();
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// produce a proof of satisfiability
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let timer_prove = Timer::new("SNARK::prove");
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let mut prover_transcript = Transcript::new(b"example");
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let proof = SNARK::prove(&inst, &decomm, vars, &input, &gens, &mut prover_transcript);
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timer_prove.stop();
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let mut encoder = ZlibEncoder::new(Vec::new(), Compression::default());
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bincode::serialize_into(&mut encoder, &proof).unwrap();
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let proof_encoded = encoder.finish().unwrap();
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let msg_proof_len = format!("SNARK::proof_compressed_len {:?}", proof_encoded.len());
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Timer::print(&msg_proof_len);
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// verify the proof of satisfiability
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let timer_verify = Timer::new("SNARK::verify");
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let mut verifier_transcript = Transcript::new(b"example");
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assert!(proof
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.verify(&comm, &input, &mut verifier_transcript, &gens)
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.is_ok());
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timer_verify.stop();
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println!();
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}
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}
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