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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::math::Math;
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use libspartan::r1csinstance::{R1CSCommitmentGens, R1CSInstance};
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use libspartan::r1csproof::R1CSGens;
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use libspartan::spartan::{SpartanGens, SpartanProof};
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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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for &s in [12, 16, 20].iter() {
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let num_vars = (s as usize).pow2();
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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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let r1cs_size = inst.size();
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let gens_r1cs_eval = R1CSCommitmentGens::new(&r1cs_size, b"gens_r1cs_eval");
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Timer::print(&format!("number_of_constraints {}", num_cons));
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// create a commitment to R1CSInstance
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let timer_encode = Timer::new("SpartanProof::encode");
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let (comm, decomm) = SpartanProof::encode(&inst, &gens_r1cs_eval);
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timer_encode.stop();
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let gens_r1cs_sat = R1CSGens::new(num_cons, num_vars, b"gens_r1cs_sat");
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let gens = SpartanGens::new(gens_r1cs_sat, gens_r1cs_eval);
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// produce a proof of satisfiability
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let timer_prove = Timer::new("SpartanProof::prove");
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let mut prover_transcript = Transcript::new(b"example");
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let proof = SpartanProof::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!("proof_compressed_len {:?}", proof_encoded.len());
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Timer::print(&msg_proof_len);
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let timer_verify = Timer::new("SpartanProof::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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