feeless glutton

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>
paritytech · May 2, 2024 · fe5a894 · fe5a894
1 parent d1270c3
commit fe5a894
Show file tree

Hide file tree

Showing 3 changed files with 47 additions and 0 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/cumulus/parachains/runtimes/glutton/glutton-westend/Cargo.toml b/cumulus/parachains/runtimes/glutton/glutton-westend/Cargo.toml
@@ -39,6 +39,7 @@ sp-std = { path = "../../../../../substrate/primitives/std", default-features =
 sp-storage = { path = "../../../../../substrate/primitives/storage", default-features = false }
 sp-transaction-pool = { path = "../../../../../substrate/primitives/transaction-pool", default-features = false }
 sp-version = { path = "../../../../../substrate/primitives/version", default-features = false }
+pallet-transaction-payment = { path = "../../../../../substrate/frame/transaction-payment", default-features = false }
 
 # Polkadot
 xcm = { package = "staging-xcm", path = "../../../../../polkadot/xcm", default-features = false }

diff --git a/cumulus/parachains/runtimes/glutton/glutton-westend/src/lib.rs b/cumulus/parachains/runtimes/glutton/glutton-westend/src/lib.rs
@@ -48,6 +48,8 @@ pub mod weights;
 pub mod xcm_config;
 
 use cumulus_pallet_parachain_system::RelayNumberMonotonicallyIncreases;
+use frame_support::weights::NoFee;
+use pallet_transaction_payment::OnChargeTransaction;
 use sp_api::impl_runtime_apis;
 pub use sp_consensus_aura::sr25519::AuthorityId as AuraId;
 use sp_core::{crypto::KeyTypeId, OpaqueMetadata};
@@ -246,6 +248,48 @@ impl pallet_sudo::Config for Runtime {
 	type WeightInfo = ();
 }
 
+/// Balance of an account.
+pub type Balance = u128;
+
+pub struct NoCharge;
+
+impl<T> OnChargeTransaction<T> for NoCharge
+where
+	T: pallet_transaction_payment::Config,
+{
+	type Balance = Balance;
+	type LiquidityInfo = ();
+
+	fn correct_and_deposit_fee(
+		_who: &T::AccountId,
+		_dispatch_info: &sp_runtime::traits::DispatchInfoOf<T::RuntimeCall>,
+		_post_info: &sp_runtime::traits::PostDispatchInfoOf<T::RuntimeCall>,
+		_corrected_fee: Self::Balance,
+		_tip: Self::Balance,
+		_already_withdrawn: Self::LiquidityInfo,
+	) -> Result<(), frame_support::pallet_prelude::TransactionValidityError> {
+		Ok(())
+	}
+	fn withdraw_fee(
+		_who: &T::AccountId,
+		_call: &T::RuntimeCall,
+		_dispatch_info: &sp_runtime::traits::DispatchInfoOf<T::RuntimeCall>,
+		_fee: Self::Balance,
+		_tip: Self::Balance,
+	) -> Result<Self::LiquidityInfo, frame_support::pallet_prelude::TransactionValidityError> {
+		Ok(())
+	}
+}
+
+impl pallet_transaction_payment::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type OnChargeTransaction = NoCharge;
+	type WeightToFee = NoFee<Balance>;
+	type LengthToFee = NoFee<Balance>;
+	type FeeMultiplierUpdate = ();
+	type OperationalFeeMultiplier = ConstU8<0>;
+}
+
 construct_runtime! {
 	pub enum Runtime
 	{
@@ -265,6 +309,7 @@ construct_runtime! {
 		Aura: pallet_aura = 30,
 		AuraExt: cumulus_pallet_aura_ext = 31,
 
+		TransactionPayment: pallet_transaction_payment,
 		// Sudo.
 		Sudo: pallet_sudo = 255,
 	}