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use crate::prover::{Prover, ProverInput, ProverResult};
use anyhow::bail;
use async_trait::async_trait;
use std::collections::HashMap;
use std::fs;
use std::path::Path;
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::Duration;
use std::time::Instant;
use tokio::time::sleep;
pub struct ProverTask {
proof_id: String,
input: ProverInput,
result: Option<ProverResult>,
is_done: bool,
vk_path: String,
}
impl ProverTask {
fn new(proof_id: &str, vk_path: &str, input: &ProverInput) -> ProverTask {
ProverTask {
proof_id: proof_id.to_string(),
input: input.clone(),
result: None,
is_done: false,
vk_path: vk_path.to_string(),
}
}
fn run(&mut self) {
let mut result = ProverResult::default();
let vk_path = self.vk_path.to_owned();
let inputdir = format!("/tmp/{}/input", self.proof_id);
let outputdir = format!("/tmp/{}/output", self.proof_id);
fs::create_dir_all(&inputdir).unwrap();
fs::create_dir_all(&outputdir).unwrap();
let (should_agg, receipt, elf_id) =
crate::local::stark::prove_stark(&self.input, &inputdir, &mut result).unwrap();
if self.input.execute_only {
result.proof_with_public_inputs = vec![];
result.stark_proof = vec![];
result.solidity_verifier = vec![];
} else if !should_agg {
log::info!(
"There is only one segment with segment size {}, will skip the aggregation!",
self.input.seg_size
);
} else if !self.input.precompile {
match crate::local::snark::prove_snark(&vk_path, &inputdir, &outputdir) {
Ok(()) => {
result.stark_proof =
std::fs::read(format!("{}/proof_with_public_inputs.json", inputdir))
.unwrap();
result.proof_with_public_inputs =
std::fs::read(format!("{}/snark_proof_with_public_inputs.json", outputdir))
.unwrap();
//result.solidity_verifier =
// std::fs::read(format!("{}/verifier.sol", outputdir)).unwrap();
result.public_values =
std::fs::read(format!("{}/public_values.json", inputdir)).unwrap();
}
Err(e) => {
log::error!("prove_snark error : {}", e);
}
}
}
if let Some(receipt) = receipt {
result.receipt.clone_from(&receipt);
result.elf_id.clone_from(&elf_id.unwrap());
}
self.result = Some(result);
self.is_done = true;
}
fn is_done(&self) -> bool {
self.is_done
}
}
pub struct LocalProver {
tasks: Arc<Mutex<HashMap<String, Arc<Mutex<ProverTask>>>>>,
vk_path: String,
}
impl LocalProver {
pub fn new(vk_path: &str) -> LocalProver {
LocalProver {
tasks: Arc::new(Mutex::new(HashMap::new())),
vk_path: vk_path.to_string(),
}
}
}
#[async_trait]
impl Prover for LocalProver {
async fn request_proof<'a>(&self, input: &'a ProverInput) -> anyhow::Result<String> {
let proof_id: String = uuid::Uuid::new_v4().to_string();
let task: Arc<Mutex<ProverTask>> =
Arc::new(Mutex::new(ProverTask::new(&proof_id, &self.vk_path, input)));
self.tasks
.lock()
.unwrap()
.insert(proof_id.clone(), task.clone());
thread::spawn(move || {
task.lock().unwrap().run();
});
Ok(proof_id)
}
async fn wait_proof<'a>(
&self,
proof_id: &'a str,
timeout: Option<Duration>,
) -> anyhow::Result<Option<ProverResult>> {
let task = self.tasks.lock().unwrap().get(proof_id).unwrap().clone();
let start_time = Instant::now();
loop {
if let Some(timeout) = timeout {
if start_time.elapsed() > timeout {
return Err(anyhow::anyhow!("Proof generation timed out."));
}
}
if task.lock().unwrap().is_done() {
self.tasks.lock().unwrap().remove(proof_id);
return Ok(task.lock().unwrap().result.clone());
}
log::info!("Waiting the proof result.");
sleep(Duration::from_secs(30)).await;
}
}
async fn setup_and_generate_sol_verifier<'a>(
&self,
vk_path: &'a str,
input: &'a ProverInput,
_timeout: Option<Duration>,
) -> anyhow::Result<()> {
let mut result = ProverResult::default();
let path = Path::new(vk_path);
if path.is_dir() {
fs::remove_dir_all(vk_path).unwrap();
}
fs::create_dir_all(vk_path).unwrap();
let (should_agg, _, _) =
crate::local::stark::prove_stark(input, vk_path, &mut result).unwrap();
if !should_agg {
log::info!("Setup: generating the stark proof false, please check the SEG_SIZE or other parameters.");
bail!("Setup: generating the stark proof false, please check the SEG_SIZE or other parameters!");
}
match crate::local::snark::setup_and_generate_sol_verifier(vk_path) {
Ok(()) => {
log::info!("setup_and_generate_sol_verifier successfully, the verify key and verifier contract are in the {}", vk_path);
Ok(())
}
Err(e) => {
log::error!("setup_and_generate_sol_verifier error : {}", e);
bail!("setup_and_generate_sol_verifier error");
}
}
}
async fn prove<'a>(
&self,
input: &'a ProverInput,
timeout: Option<Duration>,
) -> anyhow::Result<Option<ProverResult>> {
log::info!("Calling request_proof.");
let proof_id = self.request_proof(input).await?;
log::info!("Calling wait_proof, proof_id={}", proof_id);
self.wait_proof(&proof_id, timeout).await
}
}
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