lib.rs 16.9 KB
Newer Older
Gav's avatar
Gav committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
// Copyright 2017 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.

17
//! The Polkadot runtime. This can be compiled with `#[no_std]`, ready for Wasm.
Gav's avatar
Gav committed
18
19

#![cfg_attr(not(feature = "std"), no_std)]
20
21
// `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
#![recursion_limit="256"]
Gav Wood's avatar
Gav Wood committed
22

23
24
mod attestations;
mod claims;
25
mod curated_grandpa;
26
mod parachains;
Gavin Wood's avatar
Gavin Wood committed
27
28
mod slot_range;
mod slots;
Gav Wood's avatar
Gav Wood committed
29

30
use rstd::prelude::*;
31
use substrate_primitives::u32_trait::{_1, _2, _3, _4};
32
use primitives::{
33
	AccountId, AccountIndex, Balance, BlockNumber, Hash, Nonce, SessionKey, Signature,
34
	parachain, AuraId
35
};
36
use client::{
37
	block_builder::api::{self as block_builder_api, InherentData, CheckInherentsResult},
38
	runtime_api as client_api, impl_runtime_apis,
39
};
Gav Wood's avatar
Gav Wood committed
40
use sr_primitives::{
41
	ApplyResult, generic, transaction_validity::TransactionValidity, create_runtime_str, key_types,
42
43
	traits::{BlakeTwo256, Block as BlockT, DigestFor, StaticLookup},
	impl_opaque_keys, weights::Weight,
Gav Wood's avatar
Gav Wood committed
44
};
Arkadiy Paronyan's avatar
Arkadiy Paronyan committed
45
use version::RuntimeVersion;
46
use grandpa::{AuthorityId as GrandpaId, fg_primitives::{self, ScheduledChange}};
47
use elections::VoteIndex;
48
49
50
#[cfg(any(feature = "std", test))]
use version::NativeVersion;
use substrate_primitives::OpaqueMetadata;
Gavin Wood's avatar
Gavin Wood committed
51
use srml_support::{
52
	parameter_types, construct_runtime, traits::{SplitTwoWays, Currency}
Gavin Wood's avatar
Gavin Wood committed
53
};
54

Gav Wood's avatar
Gav Wood committed
55
56
#[cfg(feature = "std")]
pub use staking::StakerStatus;
57
58
#[cfg(any(feature = "std", test))]
pub use sr_primitives::BuildStorage;
59
pub use timestamp::Call as TimestampCall;
60
pub use balances::Call as BalancesCall;
61
62
pub use attestations::{Call as AttestationsCall, MORE_ATTESTATIONS_IDENTIFIER};
pub use parachains::{Call as ParachainsCall, NEW_HEADS_IDENTIFIER};
63
pub use sr_primitives::{Permill, Perbill};
64
pub use srml_support::StorageValue;
65

66
67
68
69
70
71
72
73
/// Implementations of some helper traits passed into runtime modules as associated types.
pub mod impls;
use impls::{CurrencyToVoteHandler, WeightMultiplierUpdateHandler, ToAuthor, WeightToFee};

/// Constant values used within the runtime.
pub mod constants;
use constants::{time::*, currency::*};

74
75
76
77
// Make the WASM binary available.
#[cfg(feature = "std")]
include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));

78
/// Runtime version.
Arkadiy Paronyan's avatar
Arkadiy Paronyan committed
79
pub const VERSION: RuntimeVersion = RuntimeVersion {
80
81
	spec_name: create_runtime_str!("polkadot"),
	impl_name: create_runtime_str!("parity-polkadot"),
Gav Wood's avatar
Gav Wood committed
82
	authoring_version: 1,
André Silva's avatar
André Silva committed
83
	spec_version: 1000,
84
	impl_version: 0,
85
	apis: RUNTIME_API_VERSIONS,
Arkadiy Paronyan's avatar
Arkadiy Paronyan committed
86
87
};

88
89
90
91
92
93
94
95
96
/// Native version.
#[cfg(any(feature = "std", test))]
pub fn native_version() -> NativeVersion {
	NativeVersion {
		runtime_version: VERSION,
		can_author_with: Default::default(),
	}
}

97
type NegativeImbalance = <Balances as Currency<AccountId>>::NegativeImbalance;
Gavin Wood's avatar
Gavin Wood committed
98

99
100
parameter_types! {
	pub const BlockHashCount: u64 = 250;
101
102
103
	pub const MaximumBlockWeight: Weight = 1_000_000_000;
	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
104
105
}

106
107
impl system::Trait for Runtime {
	type Origin = Origin;
Gav Wood's avatar
Gav Wood committed
108
	type Index = Nonce;
109
110
111
112
	type BlockNumber = BlockNumber;
	type Hash = Hash;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
Gav Wood's avatar
Gav Wood committed
113
	type Lookup = Indices;
114
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
115
	type WeightMultiplierUpdate = WeightMultiplierUpdateHandler;
Gav's avatar
Gav committed
116
	type Event = Event;
117
	type BlockHashCount = BlockHashCount;
118
119
120
	type MaximumBlockWeight = MaximumBlockWeight;
	type MaximumBlockLength = MaximumBlockLength;
	type AvailableBlockRatio = AvailableBlockRatio;
121
122
}

123
124
impl aura::Trait for Runtime {
	type HandleReport = aura::StakingSlasher<Runtime>;
125
	type AuthorityId = AuraId;
126
127
}

Gav Wood's avatar
Gav Wood committed
128
129
130
131
132
133
134
impl indices::Trait for Runtime {
	type IsDeadAccount = Balances;
	type AccountIndex = AccountIndex;
	type ResolveHint = indices::SimpleResolveHint<Self::AccountId, Self::AccountIndex>;
	type Event = Event;
}

Gavin Wood's avatar
Gavin Wood committed
135
parameter_types! {
136
	pub const ExistentialDeposit: Balance = 10 * CENTS;
Gavin Wood's avatar
Gavin Wood committed
137
138
139
140
141
142
143
144
145
146
147
148
149
150
	pub const TransferFee: Balance = 1 * CENTS;
	pub const CreationFee: Balance = 1 * CENTS;
	pub const TransactionBaseFee: Balance = 1 * CENTS;
	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
}

/// Splits fees 80/20 between treasury and block author.
pub type DealWithFees = SplitTwoWays<
	Balance,
	NegativeImbalance,
	_4, Treasury,   // 4 parts (80%) goes to the treasury.
	_1, ToAuthor,     // 1 part (20%) goes to the block author.
>;

151
impl balances::Trait for Runtime {
Gav's avatar
Gav committed
152
153
	type Balance = Balance;
	type OnFreeBalanceZero = Staking;
Gav Wood's avatar
Gav Wood committed
154
	type OnNewAccount = Indices;
Gav's avatar
Gav committed
155
	type Event = Event;
Gavin Wood's avatar
Gavin Wood committed
156
	type TransactionPayment = DealWithFees;
157
158
	type DustRemoval = ();
	type TransferPayment = ();
Gavin Wood's avatar
Gavin Wood committed
159
160
161
162
163
	type ExistentialDeposit = ExistentialDeposit;
	type TransferFee = TransferFee;
	type CreationFee = CreationFee;
	type TransactionBaseFee = TransactionBaseFee;
	type TransactionByteFee = TransactionByteFee;
164
	type WeightToFee = WeightToFee;
Gav's avatar
Gav committed
165
166
}

167
168
169
170
parameter_types! {
	pub const MinimumPeriod: u64 = SECS_PER_BLOCK / 2;
}

171
impl timestamp::Trait for Runtime {
172
	type Moment = u64;
173
	type OnTimestampSet = Aura;
174
	type MinimumPeriod = MinimumPeriod;
175
176
}

Gavin Wood's avatar
Gavin Wood committed
177
178
179
180
181
182
183
184
185
186
187
188
parameter_types! {
	pub const UncleGenerations: u64 = 0;
}

// TODO: substrate#2986 implement this properly
impl authorship::Trait for Runtime {
	type FindAuthor = ();
	type UncleGenerations = UncleGenerations;
	type FilterUncle = ();
	type EventHandler = ();
}

189
190
191
192
193
194
195
parameter_types! {
	pub const Period: BlockNumber = 10 * MINUTES;
	pub const Offset: BlockNumber = 0;
}

type SessionHandlers = (Grandpa, Aura);
impl_opaque_keys! {
196
197
198
199
	pub struct SessionKeys {
		#[id(key_types::ED25519)]
		pub ed25519: GrandpaId,
	}
200
201
202
203
204
205
206
207
}

// NOTE: `SessionHandler` and `SessionKeys` are co-dependent: One key will be used for each handler.
// The number and order of items in `SessionHandler` *MUST* be the same number and order of keys in
// `SessionKeys`.
// TODO: Introduce some structure to tie these together to make it a bit less of a footgun. This
// should be easy, since OneSessionHandler trait provides the `Key` as an associated type. #2858

208
impl session::Trait for Runtime {
209
210
211
	type OnSessionEnding = Staking;
	type SessionHandler = SessionHandlers;
	type ShouldEndSession = session::PeriodicSessions<Period, Offset>;
Gav's avatar
Gav committed
212
	type Event = Event;
213
	type Keys = SessionKeys;
214
215
216
217
218
219
220
221
	type SelectInitialValidators = Staking;
	type ValidatorId = AccountId;
	type ValidatorIdOf = staking::StashOf<Self>;
}

impl session::historical::Trait for Runtime {
	type FullIdentification = staking::Exposure<AccountId, Balance>;
	type FullIdentificationOf = staking::ExposureOf<Self>;
222
223
}

224
225
226
227
parameter_types! {
	pub const SessionsPerEra: session::SessionIndex = 6;
	pub const BondingDuration: staking::EraIndex = 24 * 28;
}
228

229
230
impl staking::Trait for Runtime {
	type OnRewardMinted = Treasury;
231
	type CurrencyToVote = CurrencyToVoteHandler;
Gav's avatar
Gav committed
232
	type Event = Event;
233
	type Currency = Balances;
234
235
	type Slash = ();
	type Reward = ();
236
237
	type SessionsPerEra = SessionsPerEra;
	type BondingDuration = BondingDuration;
238
	type SessionInterface = Self;
239
	type Time = Timestamp;
240
241
}

242
243
244
parameter_types! {
	pub const LaunchPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
	pub const VotingPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
245
	pub const EmergencyVotingPeriod: BlockNumber = 3 * 24 * 60 * MINUTES;
246
	pub const MinimumDeposit: Balance = 100 * BUCKS;
247
	pub const EnactmentPeriod: BlockNumber = 30 * 24 * 60 * MINUTES;
248
	pub const CooloffPeriod: BlockNumber = 30 * 24 * 60 * MINUTES;
249
250

	pub const AttestationPeriod: BlockNumber = 60 * MINUTES * 3;
251
252
}

253
254
255
impl democracy::Trait for Runtime {
	type Proposal = Call;
	type Event = Event;
256
	type Currency = Balances;
257
258
259
	type EnactmentPeriod = EnactmentPeriod;
	type LaunchPeriod = LaunchPeriod;
	type VotingPeriod = VotingPeriod;
260
	type EmergencyVotingPeriod = EmergencyVotingPeriod;
261
	type MinimumDeposit = MinimumDeposit;
262
263
264
265
266
267
	type ExternalOrigin = collective::EnsureProportionAtLeast<_1, _2, AccountId, CouncilInstance>;
	type ExternalMajorityOrigin = collective::EnsureProportionAtLeast<_2, _3, AccountId, CouncilInstance>;
	type ExternalPushOrigin = collective::EnsureProportionAtLeast<_2, _3, AccountId, TechnicalInstance>;
	type EmergencyOrigin = collective::EnsureProportionAtLeast<_1, _1, AccountId, CouncilInstance>;
	type CancellationOrigin = collective::EnsureProportionAtLeast<_2, _3, AccountId, CouncilInstance>;
	type VetoOrigin = collective::EnsureMember<AccountId, CouncilInstance>;
268
	type CooloffPeriod = CooloffPeriod;
269
}
270

271
272
273
274
275
276
277
type CouncilInstance = collective::Instance1;
impl collective::Trait<CouncilInstance> for Runtime {
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
}

Gavin Wood's avatar
Gavin Wood committed
278
parameter_types! {
279
280
281
	pub const CandidacyBond: Balance = 10 * BUCKS;
	pub const VotingBond: Balance = 1 * BUCKS;
	pub const VotingFee: Balance = 2 * BUCKS;
Gavin Wood's avatar
Gavin Wood committed
282
283
284
	pub const PresentSlashPerVoter: Balance = 1 * CENTS;
	pub const CarryCount: u32 = 6;
	// one additional vote should go by before an inactive voter can be reaped.
285
286
	pub const InactiveGracePeriod: VoteIndex = 1;
	pub const ElectionsVotingPeriod: BlockNumber = 2 * DAYS;
Gavin Wood's avatar
Gavin Wood committed
287
288
289
	pub const DecayRatio: u32 = 0;
}

290
impl elections::Trait for Runtime {
291
	type Event = Event;
292
	type Currency = Balances;
293
294
	type BadPresentation = ();
	type BadReaper = ();
295
296
	type BadVoterIndex = ();
	type LoserCandidate = ();
297
	type ChangeMembers = Council;
Gavin Wood's avatar
Gavin Wood committed
298
299
300
301
302
303
	type CandidacyBond = CandidacyBond;
	type VotingBond = VotingBond;
	type VotingFee = VotingFee;
	type PresentSlashPerVoter = PresentSlashPerVoter;
	type CarryCount = CarryCount;
	type InactiveGracePeriod = InactiveGracePeriod;
304
	type VotingPeriod = ElectionsVotingPeriod;
Gavin Wood's avatar
Gavin Wood committed
305
	type DecayRatio = DecayRatio;
306
307
}

308
309
type TechnicalInstance = collective::Instance2;
impl collective::Trait<TechnicalInstance> for Runtime {
310
311
312
313
314
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
}

Gavin Wood's avatar
Gavin Wood committed
315
316
parameter_types! {
	pub const ProposalBond: Permill = Permill::from_percent(5);
317
	pub const ProposalBondMinimum: Balance = 1 * BUCKS;
Gavin Wood's avatar
Gavin Wood committed
318
319
320
321
	pub const SpendPeriod: BlockNumber = 1 * DAYS;
	pub const Burn: Permill = Permill::from_percent(50);
}

322
impl treasury::Trait for Runtime {
Gavin Wood's avatar
Gavin Wood committed
323
	type Currency = Balances;
324
325
	type ApproveOrigin = collective::EnsureMembers<_4, AccountId, CouncilInstance>;
	type RejectOrigin = collective::EnsureMembers<_2, AccountId, CouncilInstance>;
326
	type Event = Event;
327
328
	type MintedForSpending = ();
	type ProposalRejection = ();
Gavin Wood's avatar
Gavin Wood committed
329
330
331
332
	type ProposalBond = ProposalBond;
	type ProposalBondMinimum = ProposalBondMinimum;
	type SpendPeriod = SpendPeriod;
	type Burn = Burn;
333
}
334

335
336
337
338
impl grandpa::Trait for Runtime {
	type Event = Event;
}

Gavin Wood's avatar
Gavin Wood committed
339
340
341
342
343
344
345
346
347
348
349
parameter_types! {
	pub const WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
	pub const ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
}

impl finality_tracker::Trait for Runtime {
	type OnFinalizationStalled = Grandpa;
	type WindowSize = WindowSize;
	type ReportLatency = ReportLatency;
}

350
351
352
353
354
impl attestations::Trait for Runtime {
	type AttestationPeriod = AttestationPeriod;
	type ValidatorIdentities = parachains::ValidatorIdentities<Runtime>;
}

355
356
357
impl parachains::Trait for Runtime {
	type Origin = Origin;
	type Call = Call;
358
	type ParachainCurrency = Balances;
359
}
360

Gavin Wood's avatar
Gavin Wood committed
361
parameter_types!{
362
	pub const LeasePeriod: BlockNumber = 100_000;
Gavin Wood's avatar
Gavin Wood committed
363
364
365
366
367
368
369
370
371
372
373
	pub const EndingPeriod: BlockNumber = 1000;
}

impl slots::Trait for Runtime {
	type Event = Event;
	type Currency = balances::Module<Self>;
	type Parachains = parachains::Module<Self>;
	type LeasePeriod = LeasePeriod;
	type EndingPeriod = EndingPeriod;
}

374
375
impl curated_grandpa::Trait for Runtime { }

Gav Wood's avatar
Gav Wood committed
376
377
378
379
380
impl sudo::Trait for Runtime {
	type Event = Event;
	type Proposal = Call;
}

381
construct_runtime!(
382
	pub enum Runtime where
383
		Block = Block,
384
		NodeBlock = primitives::Block,
385
		UncheckedExtrinsic = UncheckedExtrinsic
386
	{
Gavin Wood's avatar
Gavin Wood committed
387
		System: system::{Module, Call, Storage, Config, Event},
388
		Aura: aura::{Module, Config<T>, Inherent(Timestamp)},
389
		Timestamp: timestamp::{Module, Call, Storage, Inherent},
Gavin Wood's avatar
Gavin Wood committed
390
		Authorship: authorship::{Module, Call, Storage},
Gav Wood's avatar
Gav Wood committed
391
		Indices: indices,
392
		Balances: balances,
Gavin Wood's avatar
Gavin Wood committed
393
		Staking: staking::{default, OfflineWorker},
394
		Session: session::{Module, Call, Storage, Event, Config<T>},
Gavin Wood's avatar
Gavin Wood committed
395
		Democracy: democracy::{Module, Call, Storage, Config, Event<T>},
396
397
398
		Council: collective::<Instance1>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
		TechnicalCommittee: collective::<Instance2>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
		Elections: elections::{Module, Call, Storage, Event<T>, Config<T>},
Gavin Wood's avatar
Gavin Wood committed
399
400
401
402
		FinalityTracker: finality_tracker::{Module, Call, Inherent},
		Grandpa: grandpa::{Module, Call, Storage, Config, Event},
		CuratedGrandpa: curated_grandpa::{Module, Call, Config<T>, Storage},
		Treasury: treasury::{Module, Call, Storage, Event<T>},
403
		Parachains: parachains::{Module, Call, Storage, Config<T>, Inherent, Origin},
404
		Attestations: attestations::{Module, Call, Storage},
Gavin Wood's avatar
Gavin Wood committed
405
		Slots: slots::{Module, Call, Storage, Event<T>},
Gav Wood's avatar
Gav Wood committed
406
		Sudo: sudo,
Gav's avatar
Gav committed
407
	}
408
409
410
);

/// The address format for describing accounts.
Gav Wood's avatar
Gav Wood committed
411
pub type Address = <Indices as StaticLookup>::Source;
412
/// Block header type as expected by this runtime.
413
pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
414
415
416
417
418
419
/// Block type as expected by this runtime.
pub type Block = generic::Block<Header, UncheckedExtrinsic>;
/// A Block signed with a Justification
pub type SignedBlock = generic::SignedBlock<Block>;
/// BlockId type as expected by this runtime.
pub type BlockId = generic::BlockId<Block>;
420
421
422
423
424
425
426
/// The SignedExtension to the basic transaction logic.
pub type SignedExtra = (
	system::CheckEra<Runtime>,
	system::CheckNonce<Runtime>,
	system::CheckWeight<Runtime>,
	balances::TakeFees<Runtime>
);
427
/// Unchecked extrinsic type as expected by this runtime.
428
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
429
/// Extrinsic type that has already been checked.
Gav Wood's avatar
Gav Wood committed
430
pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Nonce, Call>;
431
/// Executive: handles dispatch to the various modules.
432
pub type Executive = executive::Executive<Runtime, Block, system::ChainContext<Runtime>, Runtime, AllModules>;
433
434

impl_runtime_apis! {
435
	impl client_api::Core<Block> for Runtime {
436
437
438
439
440
441
442
		fn version() -> RuntimeVersion {
			VERSION
		}

		fn execute_block(block: Block) {
			Executive::execute_block(block)
		}
443

444
445
		fn initialize_block(header: &<Block as BlockT>::Header) {
			Executive::initialize_block(header)
446
447
		}
	}
Gav's avatar
Gav committed
448

449
	impl client_api::Metadata<Block> for Runtime {
450
451
452
		fn metadata() -> OpaqueMetadata {
			Runtime::metadata().into()
		}
Gav's avatar
Gav committed
453
454
	}

455
	impl block_builder_api::BlockBuilder<Block> for Runtime {
456
457
458
459
		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult {
			Executive::apply_extrinsic(extrinsic)
		}

460
461
		fn finalize_block() -> <Block as BlockT>::Header {
			Executive::finalize_block()
462
		}
463

464
465
		fn inherent_extrinsics(data: InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
			data.create_extrinsics()
466
		}
467

468
469
		fn check_inherents(block: Block, data: InherentData) -> CheckInherentsResult {
			data.check_extrinsics(&block)
470
		}
471

472
473
474
		fn random_seed() -> <Block as BlockT>::Hash {
			System::random_seed()
		}
475
476
	}

477
	impl client_api::TaggedTransactionQueue<Block> for Runtime {
478
479
480
		fn validate_transaction(tx: <Block as BlockT>::Extrinsic) -> TransactionValidity {
			Executive::validate_transaction(tx)
		}
Gav's avatar
Gav committed
481
	}
482

483
484
485
486
487
488
	impl offchain_primitives::OffchainWorkerApi<Block> for Runtime {
		fn offchain_worker(number: sr_primitives::traits::NumberFor<Block>) {
			Executive::offchain_worker(number)
		}
	}

489
	impl parachain::ParachainHost<Block> for Runtime {
Gav Wood's avatar
Gav Wood committed
490
		fn validators() -> Vec<parachain::ValidatorId> {
491
			Aura::authorities()  // only possible as long as parachain validator crypto === aura crypto
492
493
		}
		fn duty_roster() -> parachain::DutyRoster {
494
			Parachains::calculate_duty_roster().0
495
496
497
498
		}
		fn active_parachains() -> Vec<parachain::Id> {
			Parachains::active_parachains()
		}
499
500
		fn parachain_status(id: parachain::Id) -> Option<parachain::Status> {
			Parachains::parachain_status(&id)
501
502
503
504
		}
		fn parachain_code(id: parachain::Id) -> Option<Vec<u8>> {
			Parachains::parachain_code(&id)
		}
505
506
		fn ingress(to: parachain::Id) -> Option<parachain::StructuredUnroutedIngress> {
			Parachains::ingress(to).map(parachain::StructuredUnroutedIngress)
507
		}
508
	}
509
510

	impl fg_primitives::GrandpaApi<Block> for Runtime {
Gav Wood's avatar
Gav Wood committed
511
		fn grandpa_pending_change(digest: &DigestFor<Block>)
512
513
			-> Option<ScheduledChange<BlockNumber>>
		{
514
			Grandpa::pending_change(digest)
515
516
		}

517
518
519
520
521
522
		fn grandpa_forced_change(_digest: &DigestFor<Block>)
			-> Option<(BlockNumber, ScheduledChange<BlockNumber>)>
		{
			None // disable forced changes.
		}

523
524
525
526
527
		fn grandpa_authorities() -> Vec<(SessionKey, u64)> {
			Grandpa::grandpa_authorities()
		}
	}

528
	impl consensus_aura::AuraApi<Block, AuraId> for Runtime {
529
530
531
		fn slot_duration() -> u64 {
			Aura::slot_duration()
		}
532

533
534
		fn authorities() -> Vec<AuraId> {
			Aura::authorities()
535
536
537
		}
	}

Gav's avatar
Gav committed
538
}