Added workaround trait for compiler bug

Author: ToufeeqP

core/src/da_block.rs

@@ -20,7 +20,7 @@
 #[cfg(feature = "std")]
 use std::fmt;
 
-use crate::traits::{ExtendedBlock, ExtendedHeader};
+use crate::traits::{DaHeaderProvider, ExtendedBlock, ExtendedHeader};
 use codec::{Codec, Decode, Encode};
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
@@ -146,5 +146,24 @@ where
 		>,
 	Extrinsic: Member + Codec + traits::Extrinsic + MaybeSerializeDeserialize,
 {
-	type Header = Header;
+	type DaHeader = Header;
+}
+
+impl<Header, Extrinsic, Extension>
+	DaHeaderProvider<
+		<Header as sp_runtime::traits::Header>::Number,
+		<Header as sp_runtime::traits::Header>::Hash,
+		sp_runtime::Digest,
+		Extension,
+	> for DaBlock<Header, Extrinsic>
+where
+	Header: HeaderT
+		+ ExtendedHeader<
+			<Header as sp_runtime::traits::Header>::Number,
+			<Header as sp_runtime::traits::Header>::Hash,
+			sp_runtime::Digest,
+			Extension,
+		>,
+{
+	type DaHeader = Header;
 }

core/src/traits.rs

@@ -1,6 +1,5 @@
 use codec::{Codec, Decode};
-use sp_arithmetic::traits::AtLeast32BitUnsigned;
-use sp_arithmetic::traits::Saturating;
+use sp_arithmetic::traits::{AtLeast32BitUnsigned, Saturating};
 use sp_core::U256;
 use sp_std::{convert::TryFrom, fmt::Debug, hash::Hash as StdHash};
 
@@ -10,7 +9,9 @@ pub use get_app_id::*;
 pub mod extended_header;
 pub use extended_header::*;
 
+#[cfg(feature = "runtime")]
 pub mod extended_block;
+#[cfg(feature = "runtime")]
 pub use extended_block::*;
 
 /// Header block number trait.

core/src/traits/extended_block.rs

@@ -1,19 +1,32 @@
-#[cfg(feature = "runtime")]
 use crate::traits::ExtendedHeader;
-#[cfg(feature = "runtime")]
 use sp_runtime::{
 	traits::{Block, Header},
 	Digest,
 };
 
-/// Extended block trait that extends Block to include ExtendedHeader in the header
-#[cfg(feature = "runtime")]
-pub trait ExtendedBlock<Extension>: Block {
-	type Header: Header<Hash = Self::Hash>
+/// Extended Block trait that extends substrate primitive Block to include ExtendedHeader in the header
+pub trait ExtendedBlock<Extension>:
+	Block
+	+ DaHeaderProvider<
+		<<Self as Block>::Header as Header>::Number,
+		<<Self as Block>::Header as Header>::Hash,
+		Digest,
+		Extension,
+		DaHeader = <Self as ExtendedBlock<Extension>>::DaHeader,
+	>
+{
+	type DaHeader: Header<Hash = Self::Hash>
 		+ ExtendedHeader<
 			<<Self as Block>::Header as Header>::Number,
 			<<Self as Block>::Header as Header>::Hash,
 			Digest,
 			Extension,
 		>;
 }
+
+// Note: This is a workaround for a compiler bug (https://github.com/rust-lang/rust/issues/96634)
+// and should be removed when the compiler bug is fixed.
+pub trait DaHeaderProvider<Number, Hash, Digest, Extension> {
+	/// DaHeader type.
+	type DaHeader: ExtendedHeader<Number, Hash, Digest, Extension>;
+}