fetch proof params only once

Author: hanabi1224

src/tool/subcommands/api_cmd/test_snapshot.rs

@@ -190,9 +190,7 @@ mod tests {
     use ahash::HashSet;
     use anyhow::Context as _;
     use directories::ProjectDirs;
-    use std::sync::LazyLock;
     use std::time::{Duration, Instant};
-    use tokio::sync::Mutex;
     use url::Url;
 
     // To run a single test: cargo test --lib filecoin_multisig_statedecodeparams_1754230255631789 -- --nocapture
@@ -201,8 +199,6 @@ mod tests {
     async fn rpc_regression_test_run(name: &str) {
         // Set proof parameter data dir and make sure the proofs are available
         {
-            static PROOF_PARAMS_LOCK: LazyLock<Mutex<()>> = LazyLock::new(|| Mutex::new(()));
-            let _guard = PROOF_PARAMS_LOCK.lock().await;
             crate::utils::proofs_api::maybe_set_proofs_parameter_cache_dir_env(
                 &Config::default().client.data_dir,
             );

src/utils/proofs_api/paramfetch.rs

@@ -10,7 +10,7 @@
 use std::{
     io::{self, ErrorKind},
     path::{Path, PathBuf},
-    sync::Arc,
+    sync::{Arc, LazyLock},
 };
 
 use crate::{
@@ -23,7 +23,10 @@ use crate::{
 use anyhow::{Context, bail};
 use backon::{ExponentialBuilder, Retryable};
 use futures::{AsyncWriteExt, TryStreamExt, stream::FuturesUnordered};
-use tokio::fs::{self};
+use tokio::{
+    fs::{self},
+    sync::Mutex,
+};
 use tracing::{debug, info, warn};
 
 use super::parameters::{
@@ -61,8 +64,15 @@ pub async fn ensure_proof_params_downloaded() -> anyhow::Result<()> {
     if data_dir.is_empty() {
         anyhow::bail!("Proof parameter data dir is not set");
     }
-    get_params_default(Path::new(&data_dir), SectorSizeOpt::Keys, false).await?;
-    Ok(())
+    static RUN_ONCE: LazyLock<Mutex<bool>> = LazyLock::new(|| Mutex::new(false));
+    let mut run_once = RUN_ONCE.lock().await;
+    if *run_once {
+        Ok(())
+    } else {
+        get_params_default(Path::new(&data_dir), SectorSizeOpt::Keys, false).await?;
+        *run_once = true;
+        Ok(())
+    }
 }
 
 /// Get proofs parameters and all verification keys for a given sector size