From 4fb2a559046b98be1e1b67464cd90442bbe76063 Mon Sep 17 00:00:00 2001
From: Nazar Mokrynskyi <nazar@mokrynskyi.com>
Date: Fri, 19 Jan 2024 23:20:18 +0200
Subject: [PATCH] Make `Slot` and `SlotDuration` transparent (#2999)

I have a use case that for safety requires all contained data structures
to be `#[repr(C)]` or `#[repr(transparent)]` and it seemed like
non-invasive change.
---
 substrate/primitives/consensus/slots/src/lib.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/substrate/primitives/consensus/slots/src/lib.rs b/substrate/primitives/consensus/slots/src/lib.rs
index b9a032c1bc..23cb7f7365 100644
--- a/substrate/primitives/consensus/slots/src/lib.rs
+++ b/substrate/primitives/consensus/slots/src/lib.rs
@@ -26,6 +26,7 @@ use sp_timestamp::Timestamp;
 /// Unit type wrapper that represents a slot.
 #[derive(Debug, Encode, MaxEncodedLen, Decode, Eq, Clone, Copy, Default, Ord, Hash, TypeInfo)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[repr(transparent)]
 pub struct Slot(u64);
 
 impl core::ops::Deref for Slot {
@@ -135,6 +136,7 @@ impl From<Slot> for u64 {
 	Eq,
 	TypeInfo,
 )]
+#[repr(transparent)]
 pub struct SlotDuration(u64);
 
 impl SlotDuration {