Integrate fee RPC (#508)

* Update cargo files

* First round of build fixes

* update lock file

* Fix builds again

* Revert cargo file

* remove elections genesis

* Fix chain spec

* Remove imports

* Update runtime/src/lib.rs

Co-Authored-By: Gavin Wood <gavin@parity.io>

polkadot/rpc/Cargo.toml

@@ -12,4 +12,6 @@ sr-primitives = { git = "https://github.com/paritytech/substrate", branch = "pol
 substrate-rpc = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master" }
 transaction_pool = { package = "substrate-transaction-pool", git = "https://github.com/paritytech/substrate", branch = "polkadot-master"  }
 srml-system-rpc = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master"  }
+srml-transaction-payment-rpc = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master" }
+polkadot-runtime = { path = "../runtime" }
 

polkadot/rpc/src/lib.rs

@@ -20,9 +20,10 @@
 
 use std::sync::Arc;
 
-use polkadot_primitives::{Block, AccountId, Nonce};
+use polkadot_primitives::{Block, AccountId, Nonce, Balance};
 use sr_primitives::traits::ProvideRuntimeApi;
 use transaction_pool::txpool::{ChainApi, Pool};
+use polkadot_runtime::UncheckedExtrinsic;
 
 /// A type representing all RPC extensions.
 pub type RpcExtension = jsonrpc_core::IoHandler<substrate_rpc::Metadata>;
@@ -33,13 +34,18 @@ pub fn create<C, P>(client: Arc<C>, pool: Arc<Pool<P>>) -> RpcExtension where
 	C: client::blockchain::HeaderBackend<Block>,
 	C: Send + Sync + 'static,
 	C::Api: srml_system_rpc::AccountNonceApi<Block, AccountId, Nonce>,
+	C::Api: srml_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, Balance, UncheckedExtrinsic>,
 	P: ChainApi + Sync + Send + 'static,
 {
 	use srml_system_rpc::{System, SystemApi};
+	use srml_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApi};
 
 	let mut io = jsonrpc_core::IoHandler::default();
 	io.extend_with(
 		SystemApi::to_delegate(System::new(client.clone(), pool))
 	);
+	io.extend_with(
+		TransactionPaymentApi::to_delegate(TransactionPayment::new(client))
+	);
 	io
 }

polkadot/runtime/Cargo.toml

@@ -33,6 +33,7 @@ authorship = { package = "srml-authorship", git = "https://github.com/paritytech
 babe = { package = "srml-babe", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
 balances = { package = "srml-balances", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
 transaction-payment = { package = "srml-transaction-payment", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
+srml-transaction-payment-rpc-runtime-api = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
 collective = { package = "srml-collective", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
 democracy = { package = "srml-democracy", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
 elections-phragmen = { package = "srml-elections-phragmen", git = "https://github.com/paritytech/substrate", default-features = false, branch = "polkadot-master" }
@@ -92,6 +93,7 @@ std = [
 	"authorship/std",
 	"balances/std",
 	"transaction-payment/std",
+	"srml-transaction-payment-rpc-runtime-api/std",
 	"collective/std",
 	"elections-phragmen/std",
 	"democracy/std",

polkadot/runtime/src/lib.rs

@@ -58,6 +58,7 @@ use srml_support::{
 };
 use im_online::sr25519::AuthorityId as ImOnlineId;
 use system::offchain::TransactionSubmitter;
+use srml_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
 
 #[cfg(feature = "std")]
 pub use staking::StakerStatus;
@@ -379,6 +380,9 @@ impl collective::Trait<CouncilCollective> for Runtime {
 parameter_types! {
 	pub const CandidacyBond: Balance = 100 * DOLLARS;
 	pub const VotingBond: Balance = 5 * DOLLARS;
+	pub const TermDuration: BlockNumber = 10 * MINUTES;
+	pub const DesiredMembers: u32 = 13;
+	pub const DesiredRunnersUp: u32 = 7;
 }
 
 impl elections_phragmen::Trait for Runtime {
@@ -388,6 +392,9 @@ impl elections_phragmen::Trait for Runtime {
 	type CurrencyToVote = CurrencyToVoteHandler;
 	type CandidacyBond = CandidacyBond;
 	type VotingBond = VotingBond;
+	type TermDuration = TermDuration;
+	type DesiredMembers = DesiredMembers;
+	type DesiredRunnersUp = DesiredRunnersUp;
 	type LoserCandidate = Treasury;
 	type BadReport = Treasury;
 	type KickedMember = Treasury;
@@ -576,7 +583,7 @@ construct_runtime!(
 		Democracy: democracy::{Module, Call, Storage, Config, Event<T>},
 		Council: collective::<Instance1>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
 		TechnicalCommittee: collective::<Instance2>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
-		ElectionsPhragmen: elections_phragmen::{Module, Call, Storage, Event<T>, Config<T>},
+		ElectionsPhragmen: elections_phragmen::{Module, Call, Storage, Event<T>},
 		TechnicalMembership: membership::<Instance1>::{Module, Call, Storage, Event<T>, Config<T>},
 		Treasury: treasury::{Module, Call, Storage, Event<T>},
 
@@ -742,4 +749,14 @@ impl_runtime_apis! {
 			System::account_nonce(account)
 		}
 	}
+
+	impl srml_transaction_payment_rpc_runtime_api::TransactionPaymentApi<
+		Block,
+		Balance,
+		UncheckedExtrinsic,
+	> for Runtime {
+		fn query_info(uxt: UncheckedExtrinsic, len: u32) -> RuntimeDispatchInfo<Balance> {
+			TransactionPayment::query_info(uxt, len)
+		}
+	}
 }

polkadot/service/src/chain_spec.rs

@@ -19,12 +19,11 @@
 use primitives::{Pair, Public, crypto::UncheckedInto, sr25519};
 use polkadot_primitives::{AccountId, AccountPublic, parachain::ValidatorId};
 use polkadot_runtime::{
-	GenesisConfig, CouncilConfig, ElectionsPhragmenConfig, DemocracyConfig, SystemConfig,
-	SessionConfig, StakingConfig, BalancesConfig, SessionKeys, TechnicalCommitteeConfig,
-	SudoConfig, IndicesConfig, StakerStatus, WASM_BINARY,
-	ClaimsConfig, ParachainsConfig, RegistrarConfig
+	GenesisConfig, CouncilConfig, DemocracyConfig, SystemConfig, SessionConfig, StakingConfig,
+	BalancesConfig, SessionKeys, TechnicalCommitteeConfig, SudoConfig, IndicesConfig, StakerStatus,
+	WASM_BINARY, ClaimsConfig, ParachainsConfig, RegistrarConfig
 };
-use polkadot_runtime::constants::{currency::DOTS, time::*};
+use polkadot_runtime::constants::currency::DOTS;
 use sr_primitives::{traits::IdentifyAccount, Perbill};
 use telemetry::TelemetryEndpoints;
 use hex_literal::hex;
@@ -138,12 +137,6 @@ fn staging_testnet_config_genesis() -> GenesisConfig {
 			members: vec![],
 			phantom: Default::default(),
 		}),
-		elections_phragmen: Some(ElectionsPhragmenConfig {
-			members: vec![],
-			term_duration: 49 * DAYS,
-			desired_members: 7,
-			desired_runners_up: 3,
-		}),
 		membership_Instance1: Some(Default::default()),
 		babe: Some(Default::default()),
 		grandpa: Some(Default::default()),
@@ -239,8 +232,6 @@ pub fn testnet_genesis(
 	const ENDOWMENT: u128 = 1_000_000 * DOTS;
 	const STASH: u128 = 100 * DOTS;
 
-	let desired_members = (endowed_accounts.len() / 2 - initial_authorities.len()) as u32;
-
 	GenesisConfig {
 		system: Some(SystemConfig {
 			code: WASM_BINARY.to_vec(),
@@ -280,17 +271,6 @@ pub fn testnet_genesis(
 			members: vec![],
 			phantom: Default::default(),
 		}),
-		elections_phragmen: Some(ElectionsPhragmenConfig {
-			members: endowed_accounts.iter()
-				.filter(|&endowed| initial_authorities.iter()
-					.find(|&(_, controller, _, _, _, _)| controller == endowed)
-					.is_none()
-				).cloned()
-				.collect(),
-			term_duration: 1 * DAYS,
-			desired_runners_up: desired_members / 2,
-			desired_members,
-		}),
 		membership_Instance1: Some(Default::default()),
 		babe: Some(Default::default()),
 		grandpa: Some(Default::default()),