From aea2d00b1e4fbc9ab6f1db9cd59be0baa1d443cb Mon Sep 17 00:00:00 2001
From: rnburn <ryan.burn@gmail.com>
Date: Mon, 21 Oct 2024 10:27:29 -0700
Subject: [PATCH] add write method

---
 src/compute/fixed_msm.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/compute/fixed_msm.rs b/src/compute/fixed_msm.rs
index f2fa5c1..bec1a27 100644
--- a/src/compute/fixed_msm.rs
+++ b/src/compute/fixed_msm.rs
@@ -66,6 +66,20 @@ impl<T: CurveId> MsmHandle<T> {
         }
     }
 
+    /// Serialize the handle to a file.
+    ///
+    /// This function can be used together with new_from_file to reduce
+    /// the cost of creating a handle.
+    pub fn write(&self, filename: &str) {
+        let filename = CString::new(filename).expect("filename cannot have null bytes");
+        unsafe {
+            blitzar_sys::sxt_multiexp_handle_write_to_file(
+                self.handle,
+                filename.as_ptr(),
+            );
+        }
+    }
+
     /// Compute an MSM using pre-specified generators.
     ///
     /// Suppose g_1, ..., g_n are pre-specified generators and