From e6319538e299a2570634b6d2cbc2be4de8b36981 Mon Sep 17 00:00:00 2001
From: Domas Kalinauskas <domaskal@gmail.com>
Date: Thu, 11 Jan 2024 19:34:06 +0200
Subject: [PATCH] constantine - remove usage of blst in from_bytes_unchecked

---
 constantine/src/types/fr.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/constantine/src/types/fr.rs b/constantine/src/types/fr.rs
index 5880938c..2d429def 100644
--- a/constantine/src/types/fr.rs
+++ b/constantine/src/types/fr.rs
@@ -125,8 +125,11 @@ impl Fr for CtFr {
                 let mut ret = Self::default();
                 let mut scalar = constantine::big255::default();
                 unsafe {
-                    // FIXME: Seems like no 'non-validating' variant exists in constantine
-                    blst::blst_scalar_from_bendian(ptr_transmute_mut(&mut scalar), bytes.as_ptr());
+                    let _ = constantine::ctt_big255_unmarshalBE(
+                        &mut scalar,
+                        bytes.as_ptr(),
+                        BYTES_PER_FIELD_ELEMENT as isize,
+                    );
                     constantine::ctt_bls12_381_fr_from_big255(&mut ret.0, &scalar);
                 }
                 ret