From e0b735825d012c1184eb5dfc9e207ac602351622 Mon Sep 17 00:00:00 2001
From: bear <boundless.forest@outlook.com>
Date: Wed, 15 May 2024 13:51:25 +0800
Subject: [PATCH] Simplify trait bound

---
 client/db/src/lib.rs                 | 3 +--
 client/mapping-sync/src/kv/worker.rs | 4 ++--
 template/node/src/rpc/mod.rs         | 2 +-
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/client/db/src/lib.rs b/client/db/src/lib.rs
index 80f052a35a..eea7f396df 100644
--- a/client/db/src/lib.rs
+++ b/client/db/src/lib.rs
@@ -22,7 +22,6 @@ use std::sync::Arc;
 
 // Substrate
 pub use sc_client_db::DatabaseSource;
-use sp_blockchain::HeaderBackend;
 use sp_runtime::traits::Block as BlockT;
 
 pub mod kv;
@@ -30,7 +29,7 @@ pub mod kv;
 pub mod sql;
 
 #[derive(Clone)]
-pub enum Backend<Block: BlockT, C: HeaderBackend<Block>> {
+pub enum Backend<Block: BlockT, C> {
 	KeyValue(Arc<kv::Backend<Block, C>>),
 	#[cfg(feature = "sql")]
 	Sql(Arc<sql::Backend<Block>>),
diff --git a/client/mapping-sync/src/kv/worker.rs b/client/mapping-sync/src/kv/worker.rs
index 666ddf4639..b9695382e1 100644
--- a/client/mapping-sync/src/kv/worker.rs
+++ b/client/mapping-sync/src/kv/worker.rs
@@ -59,9 +59,9 @@ pub struct MappingSyncWorker<Block: BlockT, C, BE> {
 		Arc<crate::EthereumBlockNotificationSinks<crate::EthereumBlockNotification<Block>>>,
 }
 
-impl<Block: BlockT, C: HeaderBackend<Block>, BE> Unpin for MappingSyncWorker<Block, C, BE> {}
+impl<Block: BlockT, C, BE> Unpin for MappingSyncWorker<Block, C, BE> {}
 
-impl<Block: BlockT, C: HeaderBackend<Block>, BE> MappingSyncWorker<Block, C, BE> {
+impl<Block: BlockT, C, BE> MappingSyncWorker<Block, C, BE> {
 	pub fn new(
 		import_notifications: ImportNotifications<Block>,
 		timeout: Duration,
diff --git a/template/node/src/rpc/mod.rs b/template/node/src/rpc/mod.rs
index 5005e297e2..0c8a7300ff 100644
--- a/template/node/src/rpc/mod.rs
+++ b/template/node/src/rpc/mod.rs
@@ -27,7 +27,7 @@ mod eth;
 pub use self::eth::{create_eth, EthDeps};
 
 /// Full client dependencies.
-pub struct FullDeps<C: HeaderBackend<Block>, P, A: ChainApi, CT, CIDP> {
+pub struct FullDeps<C, P, A: ChainApi, CT, CIDP> {
 	/// The client instance to use.
 	pub client: Arc<C>,
 	/// Transaction pool instance.