*added assets related pallets:

node/Cargo.toml

@@ -51,6 +51,8 @@ sp-timestamp = { version = "4.0.0-dev", git = "https://github.com/paritytech/sub
 
 # frame dependencies
 frame-system = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+pallet-assets = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+pallet-asset-tx-payment = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-transaction-payment = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-contracts = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-im-online = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }

node/src/benchmarking.rs

@@ -142,6 +142,7 @@ pub fn create_benchmark_extrinsic(
 		frame_system::CheckNonce::<runtime::Runtime>::from(nonce),
 		frame_system::CheckWeight::<runtime::Runtime>::new(),
 		pallet_transaction_payment::ChargeTransactionPayment::<runtime::Runtime>::from(0),
+		pallet_asset_tx_payment::ChargeAssetTxPayment::<runtime::Runtime>::from(10_u128, None),
 	);
 
 	let raw_payload = runtime::SignedPayload::from_raw(
@@ -156,6 +157,7 @@ pub fn create_benchmark_extrinsic(
 			(),
 			(),
 			(),
+			(),
 		),
 	);
 	let signature = raw_payload.using_encoded(|e| sender.sign(e));

node/src/chain_spec.rs

@@ -256,6 +256,7 @@ pub fn testnet_genesis(
 				.collect(),
 			phantom: Default::default(),
 		},
+		assets: Default::default(),
 		transaction_payment: Default::default(),
 	}
 }

node/src/command_helper.rs

@@ -90,6 +90,7 @@ pub fn create_benchmark_extrinsic(
 		frame_system::CheckNonce::<runtime::Runtime>::from(nonce),
 		frame_system::CheckWeight::<runtime::Runtime>::new(),
 		pallet_transaction_payment::ChargeTransactionPayment::<runtime::Runtime>::from(0),
+		pallet_asset_tx_payment::ChargeAssetTxPayment<Runtime>::from(0),
 	);
 
 	let raw_payload = runtime::SignedPayload::from_raw(

runtime/Cargo.toml

@@ -41,6 +41,8 @@ frame-executive = { version = "4.0.0-dev", default-features = false, git = "http
 frame-support = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 frame-system = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 frame-try-runtime = { version = "0.10.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", optional = true , branch = "polkadot-v0.9.28" }
+pallet-assets = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
+pallet-asset-tx-payment = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-aura = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-authority-discovery = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
 pallet-authorship = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.28" }
@@ -97,6 +99,7 @@ std = [
 	"frame-support/std",
 	"frame-system-rpc-runtime-api/std",
 	"frame-system/std",
+	"pallet-assets/std",
 	"pallet-aura/std",
 	"pallet-authority-discovery/std",
 	"pallet-authorship/std",
@@ -160,6 +163,7 @@ try-runtime = [
 	"frame-executive/try-runtime",
 	"frame-try-runtime",
 	"frame-system/try-runtime",
+	"pallet-assets/try-runtime",
 	"pallet-aura/try-runtime",
 	"pallet-balances/try-runtime",
 	"pallet-grandpa/try-runtime",

runtime/src/impls.rs

@@ -0,0 +1,15 @@
+use crate::{AccountId, Assets, Runtime};
+use frame_support::traits::fungibles::{Balanced, CreditOf};
+use pallet_asset_tx_payment::HandleCredit;
+
+/// A `HandleCredit` implementation that naively transfers the fees to the block author.
+/// Will drop and burn the assets in case the transfer fails.
+pub struct CreditToBlockAuthor;
+impl HandleCredit<AccountId, Assets> for CreditToBlockAuthor {
+	fn handle_credit(credit: CreditOf<AccountId, Assets>) {
+		if let Some(author) = pallet_authorship::Pallet::<Runtime>::author() {
+			// Drop the result which will trigger the `OnDrop` of the imbalance in case of error.
+			let _ = Assets::resolve(&author, credit);
+		}
+	}
+}

runtime/src/lib.rs

@@ -38,7 +38,7 @@ use sp_runtime::{
 	create_runtime_str,
 	curve::PiecewiseLinear,
 	generic, impl_opaque_keys,
-	traits::{AccountIdLookup, BlakeTwo256, Block as BlockT, NumberFor, OpaqueKeys},
+	traits::{AccountIdLookup, BlakeTwo256, Block as BlockT, ConvertInto, NumberFor, OpaqueKeys},
 	transaction_validity::{TransactionPriority, TransactionSource, TransactionValidity},
 	ApplyExtrinsicResult, FixedU128, Percent,
 };
@@ -75,6 +75,10 @@ use pallet_transaction_payment::CurrencyAdapter;
 pub use sp_runtime::BuildStorage;
 pub use sp_runtime::{Perbill, Permill};
 
+/// Implementations of some helper traits passed into runtime modules as associated types.
+pub mod impls;
+use impls::CreditToBlockAuthor;
+
 use pallet_election_provider_multi_phase::SolutionAccuracyOf;
 use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
 use pallet_session::historical as pallet_session_historical;
@@ -955,6 +959,42 @@ impl pallet_referenda::Config for Runtime {
 	type Tracks = TracksInfo;
 }
 
+parameter_types! {
+	pub const AssetDeposit: Balance = 100 * DOLLARS;
+	pub const ApprovalDeposit: Balance = 1 * DOLLARS;
+	pub const StringLimit: u32 = 50;
+	pub const MetadataDepositBase: Balance = 10 * DOLLARS;
+	pub const MetadataDepositPerByte: Balance = 1 * DOLLARS;
+}
+
+// TODO - Update settings
+impl pallet_assets::Config for Runtime {
+	type Event = Event;
+	type Balance = u128;
+	type AssetId = u32;
+	type Currency = Balances;
+	type ForceOrigin = EnsureRoot<AccountId>;
+	type AssetDeposit = AssetDeposit;
+	type AssetAccountDeposit = ConstU128<DOLLARS>;
+	type MetadataDepositBase = MetadataDepositBase;
+	type MetadataDepositPerByte = MetadataDepositPerByte;
+	type ApprovalDeposit = ApprovalDeposit;
+	type StringLimit = StringLimit;
+	type Freezer = ();
+	type Extra = ();
+	type WeightInfo = pallet_assets::weights::SubstrateWeight<Runtime>;
+}
+
+// TODO - Update settings
+impl pallet_asset_tx_payment::Config for Runtime {
+	type Event = Event;
+	type Fungibles = Assets;
+	type OnChargeAssetTransaction = pallet_asset_tx_payment::FungiblesAdapter<
+		pallet_assets::BalanceToAssetBalance<Balances, Runtime, ConvertInto>,
+		CreditToBlockAuthor,
+	>;
+}
+
 impl pallet_sudo::Config for Runtime {
 	type Event = Event;
 	type Call = Call;
@@ -1020,6 +1060,8 @@ construct_runtime!(
 		TechnicalMembership: pallet_membership::<Instance1>,
 		Referenda: pallet_referenda,
 		ConvictionVoting: pallet_conviction_voting,
+		Assets: pallet_assets,
+		AssetTxPayment: pallet_asset_tx_payment,
 	}
 );
 
@@ -1039,6 +1081,7 @@ pub type SignedExtra = (
 	frame_system::CheckNonce<Runtime>,
 	frame_system::CheckWeight<Runtime>,
 	pallet_transaction_payment::ChargeTransactionPayment<Runtime>,
+	pallet_asset_tx_payment::ChargeAssetTxPayment<Runtime>,
 );
 /// Unchecked extrinsic type as expected by this runtime.
 pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;