refactor: Transaction-Payment module (#3816)

* Initial draft that compiles

* Extract payment stuff from balances

* Extract multiplier update stuff from system

* Some fixes.

* Update len-fee as well

* some review comments.

* Remove todo

* bump

substrate/node/cli/Cargo.toml

@@ -45,6 +45,7 @@ finality_tracker = { package = "srml-finality-tracker", path = "../../srml/final
 contracts = { package = "srml-contracts", path = "../../srml/contracts" }
 system = { package = "srml-system", path = "../../srml/system" }
 balances = { package = "srml-balances", path = "../../srml/balances" }
+transaction-payment = { package = "srml-transaction-payment", path = "../../srml/transaction-payment" }
 support = { package = "srml-support", path = "../../srml/support", default-features = false }
 im_online = { package = "srml-im-online", path = "../../srml/im-online", default-features = false }
 sr-authority-discovery = { package = "srml-authority-discovery", path = "../../srml/authority-discovery", default-features = false }

substrate/node/cli/src/factory_impl.rs

@@ -56,7 +56,7 @@ impl<Number> FactoryState<Number> {
 			system::CheckEra::from(Era::mortal(256, phase)),
 			system::CheckNonce::from(index),
 			system::CheckWeight::new(),
-			balances::TakeFees::from(0),
+			transaction_payment::ChargeTransactionPayment::from(0),
 			Default::default(),
 		)
 	}

substrate/node/cli/src/service.rs

@@ -528,14 +528,14 @@ mod tests {
 				let check_era = system::CheckEra::from(Era::Immortal);
 				let check_nonce = system::CheckNonce::from(index);
 				let check_weight = system::CheckWeight::new();
-				let take_fees = balances::TakeFees::from(0);
+				let payment = transaction_payment::ChargeTransactionPayment::from(0);
 				let extra = (
 					check_version,
 					check_genesis,
 					check_era,
 					check_nonce,
 					check_weight,
-					take_fees,
+					payment,
 					Default::default(),
 				);
 				let raw_payload = SignedPayload::from_raw(