From 05ed9d9bc20587ca5a6e7ff1e397932208e481d9 Mon Sep 17 00:00:00 2001
From: librelois <c@elo.tf>
Date: Mon, 27 Nov 2023 16:27:20 +0100
Subject: [PATCH] add rpc api pending_initialize_block

---
 client/rpc/src/eth/pending.rs | 9 ++++++++-
 primitives/rpc/src/lib.rs     | 6 ++++++
 template/runtime/src/lib.rs   | 4 ++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/client/rpc/src/eth/pending.rs b/client/rpc/src/eth/pending.rs
index 822562ded0..24a7886e5e 100644
--- a/client/rpc/src/eth/pending.rs
+++ b/client/rpc/src/eth/pending.rs
@@ -37,6 +37,7 @@ use sp_runtime::{
 use sp_timestamp::TimestampInherentData;
 
 use crate::eth::{Eth, EthConfig};
+use fp_rpc::EthereumRuntimeRPCApi;
 
 const LOG_TARGET: &str = "eth-pending";
 
@@ -60,6 +61,7 @@ where
 	B: BlockT,
 	C: ProvideRuntimeApi<B>,
 	C::Api: BlockBuilderApi<B>,
+	C::Api: EthereumRuntimeRPCApi<B>,
 	C: HeaderBackend<B> + StorageProvider<B, BE> + 'static,
 	BE: Backend<B>,
 	A: ChainApi<Block = B>,
@@ -100,7 +102,12 @@ where
 		);
 
 		// Initialize the pending block header
-		api.initialize_block(best_hash, &pending_header)?;
+		if api
+			.initialize_pending_block(best_hash, &pending_header)
+			.is_err()
+		{
+			api.initialize_block(best_hash, &pending_header)?
+		}
 
 		// Apply inherents to the pending block.
 		let inherents = api.execute_in_transaction(move |api| {
diff --git a/primitives/rpc/src/lib.rs b/primitives/rpc/src/lib.rs
index 5512a5c379..851aa4dece 100644
--- a/primitives/rpc/src/lib.rs
+++ b/primitives/rpc/src/lib.rs
@@ -239,6 +239,12 @@ sp_api::decl_runtime_apis! {
 		fn pending_block(
 			xts: Vec<<Block as BlockT>::Extrinsic>,
 		) -> (Option<ethereum::BlockV2>, Option<Vec<TransactionStatus>>);
+		/// Initialize the pending block.
+		/// The behavior should be the same as the runtime api Core_initialize_block but
+		/// for a "pending" block.
+		/// If your project don't need to have a different behavior to initialize "pending" blocks, 
+		/// you can copy your Core_initialize_block implementation.
+		fn initialize_pending_block(header: &<Block as BlockT>::Header);
 	}
 
 	#[api_version(2)]
diff --git a/template/runtime/src/lib.rs b/template/runtime/src/lib.rs
index 5995ec780a..54339e2764 100644
--- a/template/runtime/src/lib.rs
+++ b/template/runtime/src/lib.rs
@@ -823,6 +823,10 @@ impl_runtime_apis! {
 				pallet_ethereum::CurrentTransactionStatuses::<Runtime>::get()
 			)
 		}
+
+		fn initialize_pending_block(header: &<Block as BlockT>::Header) {
+			Executive::initialize_block(header)
+		}
 	}
 
 	impl fp_rpc::ConvertTransactionRuntimeApi<Block> for Runtime {