frame/utils: introduce substrate-rpc-client crate for RPC utils (#12212)

* hack together a PoC

* Update utils/frame/rpc-utils/Cargo.toml

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update utils/frame/rpc-utils/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* rpc_utils -> substrate_rpc_client

* try runtime: remove keep connection

* make CI happy

* cargo fmt

* fix ci

* update lock file

* fix

* fix

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: kianenigma <kian@parity.io>

substrate/frame/bags-list/remote-tests/src/migration.rs

@@ -24,14 +24,15 @@ use sp_runtime::{traits::Block as BlockT, DeserializeOwned};
 
 /// Test voter bags migration. `currency_unit` is the number of planks per the the runtimes `UNITS`
 /// (i.e. number of decimal places per DOT, KSM etc)
-pub async fn execute<
-	Runtime: RuntimeT<pallet_bags_list::Instance1>,
-	Block: BlockT + DeserializeOwned,
->(
+pub async fn execute<Runtime, Block>(
 	currency_unit: u64,
 	currency_name: &'static str,
 	ws_url: String,
-) {
+) where
+	Runtime: RuntimeT<pallet_bags_list::Instance1>,
+	Block: BlockT,
+	Block::Header: DeserializeOwned,
+{
 	let mut ext = Builder::<Block>::new()
 		.mode(Mode::Online(OnlineConfig {
 			transport: ws_url.to_string().into(),

substrate/frame/bags-list/remote-tests/src/snapshot.rs

@@ -22,14 +22,12 @@ use remote_externalities::{Builder, Mode, OnlineConfig};
 use sp_runtime::{traits::Block as BlockT, DeserializeOwned};
 
 /// Execute create a snapshot from pallet-staking.
-pub async fn execute<
+pub async fn execute<Runtime, Block>(voter_limit: Option<usize>, currency_unit: u64, ws_url: String)
+where
 	Runtime: crate::RuntimeT<pallet_bags_list::Instance1>,
-	Block: BlockT + DeserializeOwned,
->(
-	voter_limit: Option<usize>,
-	currency_unit: u64,
-	ws_url: String,
-) {
+	Block: BlockT,
+	Block::Header: DeserializeOwned,
+{
 	use frame_support::storage::generator::StorageMap;
 
 	let mut ext = Builder::<Block>::new()

substrate/frame/bags-list/remote-tests/src/try_state.rs

@@ -25,14 +25,15 @@ use remote_externalities::{Builder, Mode, OnlineConfig};
 use sp_runtime::{traits::Block as BlockT, DeserializeOwned};
 
 /// Execute the sanity check of the bags-list.
-pub async fn execute<
-	Runtime: crate::RuntimeT<pallet_bags_list::Instance1>,
-	Block: BlockT + DeserializeOwned,
->(
+pub async fn execute<Runtime, Block>(
 	currency_unit: u64,
 	currency_name: &'static str,
 	ws_url: String,
-) {
+) where
+	Runtime: crate::RuntimeT<pallet_bags_list::Instance1>,
+	Block: BlockT,
+	Block::Header: DeserializeOwned,
+{
 	let mut ext = Builder::<Block>::new()
 		.mode(Mode::Online(OnlineConfig {
 			transport: ws_url.to_string().into(),