From ec26d46a57452e1387d86717a9b3cde318e997f5 Mon Sep 17 00:00:00 2001
From: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Date: Tue, 9 Jan 2024 13:23:58 +0100
Subject: [PATCH 1/3] Make PrevalidateAttests Send + Sync and remove bounds

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
---
 polkadot/runtime/common/src/claims.rs | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/polkadot/runtime/common/src/claims.rs b/polkadot/runtime/common/src/claims.rs
index d15e04a660f7..cd9413940e05 100644
--- a/polkadot/runtime/common/src/claims.rs
+++ b/polkadot/runtime/common/src/claims.rs
@@ -591,11 +591,9 @@ impl<T: Config> Pallet<T> {
 /// otherwise free to place on chain.
 #[derive(Encode, Decode, Clone, Eq, PartialEq, TypeInfo)]
 #[scale_info(skip_type_params(T))]
-pub struct PrevalidateAttests<T: Config + Send + Sync>(sp_std::marker::PhantomData<T>)
-where
-	<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>;
+pub struct PrevalidateAttests<T>(core::marker::PhantomData<fn(T)>);
 
-impl<T: Config + Send + Sync> Debug for PrevalidateAttests<T>
+impl<T: Config> Debug for PrevalidateAttests<T>
 where
 	<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
 {
@@ -610,7 +608,7 @@ where
 	}
 }
 
-impl<T: Config + Send + Sync> PrevalidateAttests<T>
+impl<T: Config> PrevalidateAttests<T>
 where
 	<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
 {
@@ -620,7 +618,7 @@ where
 	}
 }
 
-impl<T: Config + Send + Sync> SignedExtension for PrevalidateAttests<T>
+impl<T: Config> SignedExtension for PrevalidateAttests<T>
 where
 	<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
 {
@@ -1469,6 +1467,12 @@ mod tests {
 			);
 		});
 	}
+
+	#[test]
+	fn prevalidate_assets_is_send_and_sync() {
+		fn is_send_and_sync<T: Send + Sync>() {}
+		is_send_and_sync::<PrevalidateAttests<Test>>();
+	}
 }
 
 #[cfg(feature = "runtime-benchmarks")]

From 7cb1ed6925078f8fe3fc4506c21af14fb859ea27 Mon Sep 17 00:00:00 2001
From: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Date: Tue, 9 Jan 2024 13:27:17 +0100
Subject: [PATCH 2/3] Add prdoc

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
---
 prdoc/pr_2886.prdoc | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 prdoc/pr_2886.prdoc

diff --git a/prdoc/pr_2886.prdoc b/prdoc/pr_2886.prdoc
new file mode 100644
index 000000000000..9fd97c11e111
--- /dev/null
+++ b/prdoc/pr_2886.prdoc
@@ -0,0 +1,13 @@
+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: Remove bounds from `PrevalidateAttests` struct definition
+
+doc:
+  - audience: Runtime Dev
+    description: |
+      Minimal change to `PrevalidateAssets` to remove some trait bounds on the struct itself while
+      keeping all its capabilities.
+
+crates:
+  - name: polkadot-runtime-common

From cfaf2783e60a0fde0aff2f4cfca2bf3fba8b9a10 Mon Sep 17 00:00:00 2001
From: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Date: Tue, 9 Jan 2024 18:01:07 +0100
Subject: [PATCH 3/3] Update polkadot/runtime/common/src/claims.rs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: Bastian Köcher <git@kchr.de>
---
 polkadot/runtime/common/src/claims.rs | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/polkadot/runtime/common/src/claims.rs b/polkadot/runtime/common/src/claims.rs
index cd9413940e05..4cddab969c08 100644
--- a/polkadot/runtime/common/src/claims.rs
+++ b/polkadot/runtime/common/src/claims.rs
@@ -1467,12 +1467,6 @@ mod tests {
 			);
 		});
 	}
-
-	#[test]
-	fn prevalidate_assets_is_send_and_sync() {
-		fn is_send_and_sync<T: Send + Sync>() {}
-		is_send_and_sync::<PrevalidateAttests<Test>>();
-	}
 }
 
 #[cfg(feature = "runtime-benchmarks")]