change hardcoded file to tempdir

Cargo.lock

@@ -6536,6 +6536,7 @@ dependencies = [
  "reqwest 0.12.4",
  "serde",
  "tap",
+ "tempfile",
  "thiserror 2.0.12",
  "tokio",
  "tokio-stream",

sdk/rust/nym-sdk/Cargo.toml

@@ -58,6 +58,7 @@ tap = { workspace = true }
 thiserror = { workspace = true }
 url = { workspace = true }
 toml = { workspace = true }
+tempfile = { workspace = true }
 
 # tcpproxy dependencies
 clap = { workspace = true, features = ["derive"] }

sdk/rust/nym-sdk/examples/surb_reply.rs

@@ -3,13 +3,14 @@ use nym_sdk::mixnet::{
     StoragePaths,
 };
 use std::path::PathBuf;
+use tempfile::TempDir;
 
 #[tokio::main]
 async fn main() {
     nym_bin_common::logging::setup_logging();
 
     // Specify some config options
-    let config_dir = PathBuf::from("/tmp/surb-example");
+    let config_dir: PathBuf = TempDir::new().unwrap().path().to_path_buf();
     let storage_paths = StoragePaths::new_from_dir(&config_dir).unwrap();
 
     // Create the client with a storage backend, and enable it by giving it some paths. If keys