From ed593ae2570669b804db58d67472f34968aafc78 Mon Sep 17 00:00:00 2001
From: Matthias Seitz <matthias.seitz@outlook.de>
Date: Wed, 29 Jan 2025 11:14:45 +0100
Subject: [PATCH] feat: introduce helper alias type (#14058)

---
 crates/primitives-traits/src/header/mod.rs    | 2 +-
 crates/primitives-traits/src/header/sealed.rs | 5 ++++-
 crates/primitives-traits/src/lib.rs           | 2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/crates/primitives-traits/src/header/mod.rs b/crates/primitives-traits/src/header/mod.rs
index abcdf4ee0..7f3a5ab06 100644
--- a/crates/primitives-traits/src/header/mod.rs
+++ b/crates/primitives-traits/src/header/mod.rs
@@ -1,5 +1,5 @@
 mod sealed;
-pub use sealed::{Header, SealedHeader};
+pub use sealed::{Header, SealedHeader, SealedHeaderFor};
 
 mod error;
 pub use error::HeaderError;
diff --git a/crates/primitives-traits/src/header/sealed.rs b/crates/primitives-traits/src/header/sealed.rs
index 0cae46d3b..c852ba26d 100644
--- a/crates/primitives-traits/src/header/sealed.rs
+++ b/crates/primitives-traits/src/header/sealed.rs
@@ -1,4 +1,4 @@
-use crate::{sync::OnceLock, InMemorySize};
+use crate::{sync::OnceLock, InMemorySize, NodePrimitives};
 pub use alloy_consensus::Header;
 use alloy_consensus::Sealed;
 use alloy_eips::{eip1898::BlockWithParent, BlockNumHash};
@@ -8,6 +8,9 @@ use bytes::BufMut;
 use core::mem;
 use derive_more::{AsRef, Deref};
 
+/// Type alias for [`SealedHeader`] generic over the `BlockHeader` type of [`NodePrimitives`].
+pub type SealedHeaderFor<N> = SealedHeader<<N as NodePrimitives>::BlockHeader>;
+
 /// Seals the header with the block hash.
 ///
 /// This type uses lazy sealing to avoid hashing the header until it is needed:
diff --git a/crates/primitives-traits/src/lib.rs b/crates/primitives-traits/src/lib.rs
index 64baae580..dd28fcaa0 100644
--- a/crates/primitives-traits/src/lib.rs
+++ b/crates/primitives-traits/src/lib.rs
@@ -120,7 +120,7 @@ pub mod sync;
 
 /// Common header types
 pub mod header;
-pub use header::{Header, HeaderError, SealedHeader};
+pub use header::{Header, HeaderError, SealedHeader, SealedHeaderFor};
 
 /// Bincode-compatible serde implementations for common abstracted types in Reth.
 ///