1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
// Copyright 2019-2021 Parity Technologies (UK) Ltd.
// This file is part of Cumulus.

// Cumulus 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.

// Cumulus 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 Cumulus.  If not, see <http://www.gnu.org/licenses/>.

use std::{sync::Arc, time::Duration};

use cfg_primitives::{AccountId, AuraId, Balance, Block, BlockNumber, Hash, Nonce};
use cumulus_client_cli::CollatorOptions;
use cumulus_client_collator::service::CollatorService;
use cumulus_client_consensus_common::ParachainBlockImport as TParachainBlockImport;
use cumulus_client_consensus_proposer::Proposer;
use cumulus_primitives_core::ParaId;
use cumulus_relay_chain_interface::{OverseerHandle, RelayChainInterface};
use fc_db::Backend as FrontierBackend;
use fc_rpc::pending::{AuraConsensusDataProvider, ConsensusDataProvider};
use polkadot_primitives::CollatorPair;
use sc_executor::NativeElseWasmExecutor;
use sc_network_sync::SyncingService;
use sc_service::{Configuration, TFullBackend, TFullClient, TaskManager};
use sc_telemetry::TelemetryHandle;
use sp_api::ConstructRuntimeApi;
use sp_core::U256;
use sp_keystore::KeystorePtr;
use substrate_prometheus_endpoint::Registry;

use crate::rpc::{self};

pub(crate) mod evm;
use evm::EthConfiguration;

type FullClient<RuntimeApi, Executor> =
	TFullClient<Block, RuntimeApi, NativeElseWasmExecutor<Executor>>;

type FullBackend = TFullBackend<Block>;

type ParachainBlockImport<RuntimeApi, Executor> =
	TParachainBlockImport<Block, Arc<FullClient<RuntimeApi, Executor>>, FullBackend>;

pub trait RuntimeApiCollection:
	sp_transaction_pool::runtime_api::TaggedTransactionQueue<Block>
	+ sp_api::ApiExt<Block>
	+ sp_block_builder::BlockBuilder<Block>
	+ substrate_frame_rpc_system::AccountNonceApi<Block, AccountId, Nonce>
	+ pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<Block, Balance>
	+ sp_api::Metadata<Block>
	+ sp_offchain::OffchainWorkerApi<Block>
	+ sp_session::SessionKeys<Block>
	+ fp_rpc::ConvertTransactionRuntimeApi<Block>
	+ fp_rpc::EthereumRuntimeRPCApi<Block>
	+ sp_consensus_aura::AuraApi<Block, AuraId>
	+ runtime_common::apis::AnchorApi<Block, Hash, BlockNumber>
	+ cumulus_primitives_core::CollectCollationInfo<Block>
{
}

impl<Api> RuntimeApiCollection for Api where
	Api: sp_transaction_pool::runtime_api::TaggedTransactionQueue<Block>
		+ sp_api::ApiExt<Block>
		+ sp_block_builder::BlockBuilder<Block>
		+ substrate_frame_rpc_system::AccountNonceApi<Block, AccountId, Nonce>
		+ pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<Block, Balance>
		+ sp_api::Metadata<Block>
		+ sp_offchain::OffchainWorkerApi<Block>
		+ sp_session::SessionKeys<Block>
		+ fp_rpc::ConvertTransactionRuntimeApi<Block>
		+ fp_rpc::EthereumRuntimeRPCApi<Block>
		+ sp_consensus_aura::AuraApi<Block, AuraId>
		+ runtime_common::apis::AnchorApi<Block, Hash, BlockNumber>
		+ cumulus_primitives_core::CollectCollationInfo<Block>
{
}

// Native Altair executor instance.
pub struct AltairRuntimeExecutor;

impl sc_executor::NativeExecutionDispatch for AltairRuntimeExecutor {
	/// Only enable the benchmarking host functions when we actually want to
	/// benchmark.
	#[cfg(feature = "runtime-benchmarks")]
	type ExtendHostFunctions = frame_benchmarking::benchmarking::HostFunctions;
	/// Otherwise we only use the default Substrate host functions.
	#[cfg(not(feature = "runtime-benchmarks"))]
	type ExtendHostFunctions = ();

	fn dispatch(method: &str, data: &[u8]) -> Option<Vec<u8>> {
		altair_runtime::api::dispatch(method, data)
	}

	fn native_version() -> sc_executor::NativeVersion {
		altair_runtime::native_version()
	}
}

// Native Centrifuge executor instance.
pub struct CentrifugeRuntimeExecutor;

impl sc_executor::NativeExecutionDispatch for CentrifugeRuntimeExecutor {
	/// Only enable the benchmarking host functions when we actually want to
	/// benchmark.
	#[cfg(feature = "runtime-benchmarks")]
	type ExtendHostFunctions = frame_benchmarking::benchmarking::HostFunctions;
	/// Otherwise we only use the default Substrate host functions.
	#[cfg(not(feature = "runtime-benchmarks"))]
	type ExtendHostFunctions = ();

	fn dispatch(method: &str, data: &[u8]) -> Option<Vec<u8>> {
		centrifuge_runtime::api::dispatch(method, data)
	}

	fn native_version() -> sc_executor::NativeVersion {
		centrifuge_runtime::native_version()
	}
}

// Native Development executor instance.
pub struct DevelopmentRuntimeExecutor;

impl sc_executor::NativeExecutionDispatch for DevelopmentRuntimeExecutor {
	/// Only enable the benchmarking host functions when we actually want to
	/// benchmark.
	#[cfg(feature = "runtime-benchmarks")]
	type ExtendHostFunctions = frame_benchmarking::benchmarking::HostFunctions;
	/// Otherwise we only use the default Substrate host functions.
	#[cfg(not(feature = "runtime-benchmarks"))]
	type ExtendHostFunctions = ();

	fn dispatch(method: &str, data: &[u8]) -> Option<Vec<u8>> {
		development_runtime::api::dispatch(method, data)
	}

	fn native_version() -> sc_executor::NativeVersion {
		development_runtime::native_version()
	}
}

/// Start a generic parachain node.
pub async fn start_node<RuntimeApi, Executor>(
	parachain_config: Configuration,
	polkadot_config: Configuration,
	eth_config: EthConfiguration,
	collator_options: CollatorOptions,
	id: ParaId,
	hwbench: Option<sc_sysinfo::HwBench>,
	first_evm_block: BlockNumber,
) -> sc_service::error::Result<(TaskManager, Arc<FullClient<RuntimeApi, Executor>>)>
where
	RuntimeApi:
		ConstructRuntimeApi<Block, FullClient<RuntimeApi, Executor>> + Send + Sync + 'static,
	RuntimeApi::RuntimeApi: RuntimeApiCollection,
	Executor: sc_executor::NativeExecutionDispatch + 'static,
{
	let is_authority = parachain_config.role.is_authority();

	evm::start_node_impl::<RuntimeApi, Executor, _, _>(
		parachain_config,
		polkadot_config,
		eth_config,
		collator_options,
		id,
		hwbench,
		first_evm_block,
		// follows Moonbeam's create_full
		move |client,
		      pool,
		      deny_unsafe,
		      subscription_task_executor,
		      network,
		      sync_service,
		      frontier_backend,
		      filter_pool,
		      fee_history_cache,
		      overrides,
		      block_data_cache| {

            let slot_duration = sc_consensus_aura::slot_duration(&*client)?;
            let target_gas_price = eth_config.target_gas_price;
            let pending_create_inherent_data_providers = move |_, ()| async move {
                let current = sp_timestamp::InherentDataProvider::from_system_time();
                let next_slot = current.timestamp().as_millis() + slot_duration.as_millis();
                let timestamp = sp_timestamp::InherentDataProvider::new(next_slot.into());
                let slot =
                    sp_consensus_aura::inherents::InherentDataProvider::from_timestamp_and_slot_duration(
                        *timestamp,
                        slot_duration,
                    );
                let dynamic_fee = fp_dynamic_fee::InherentDataProvider(U256::from(target_gas_price));
                Ok((slot, timestamp, dynamic_fee))
            };
			let pending_consensus_data_provider = Some(Box::new(AuraConsensusDataProvider::new(client.clone())) as Box<dyn ConsensusDataProvider<_>>);

			let module = rpc::create_full(client.clone(), pool.clone(), deny_unsafe)?;
			let eth_deps = rpc::evm::EvmDeps {
				client,
				pool: pool.clone(),
				graph: pool.pool().clone(),
				converter: Some(development_runtime::TransactionConverter),
				is_authority,
				enable_dev_signer: eth_config.enable_dev_signer,
				network,
				sync: sync_service.clone(),
				frontier_backend: match frontier_backend.clone() {
					fc_db::Backend::KeyValue(b) => Arc::new(b),
					#[cfg(feature = "sql")]
					fc_db::Backend::Sql(b) => Arc::new(b),
				},
				overrides,
				block_data_cache,
				filter_pool: Some(filter_pool),
				max_past_logs: eth_config.max_past_logs,
				fee_history_cache,
				fee_history_cache_limit: eth_config.fee_history_limit,
				execute_gas_limit_multiplier: eth_config.execute_gas_limit_multiplier,
				forced_parent_hashes: None,
				pending_create_inherent_data_providers,
				pending_consensus_data_provider
			};
			let module = rpc::evm::create(
				module,
				eth_deps,
				subscription_task_executor,
				Arc::new(Default::default()),
			)?;
			Ok(module)
		},
		build_import_queue::<RuntimeApi, Executor>,
	)
	.await
}

/// Builds a generic import queue. The runtime is specified via the generics.
///
/// NOTE: Almost entirely taken from Polkadot SDK.
#[allow(clippy::type_complexity)]
pub fn build_import_queue<RuntimeApi, Executor>(
	client: Arc<FullClient<RuntimeApi, Executor>>,
	block_import: ParachainBlockImport<RuntimeApi, Executor>,
	config: &Configuration,
	telemetry: Option<TelemetryHandle>,
	task_manager: &TaskManager,
	frontier_backend: FrontierBackend<Block>,
	first_evm_block: BlockNumber,
) -> Result<sc_consensus::DefaultImportQueue<Block>, sc_service::Error>
where
	RuntimeApi:
		ConstructRuntimeApi<Block, FullClient<RuntimeApi, Executor>> + Send + Sync + 'static,
	RuntimeApi::RuntimeApi: RuntimeApiCollection,
	Executor: sc_executor::NativeExecutionDispatch + 'static,
{
	let slot_duration = cumulus_client_consensus_aura::slot_duration(&*client)?;
	let block_import = evm::BlockImport::new(
		block_import,
		first_evm_block,
		client.clone(),
		Arc::new(frontier_backend),
	);

	Ok(
		cumulus_client_consensus_aura::equivocation_import_queue::fully_verifying_import_queue::<
			sp_consensus_aura::sr25519::AuthorityPair,
			_,
			_,
			_,
			_,
		>(
			client,
			block_import,
			move |_, _| async move {
				let timestamp = sp_timestamp::InherentDataProvider::from_system_time();
				Ok(timestamp)
			},
			slot_duration,
			&task_manager.spawn_essential_handle(),
			config.prometheus_registry(),
			telemetry,
		),
	)
}

/// Starts the aura consensus.
///
/// NOTE: Taken from Polkadot SDK because Moonbeam uses their custom Nimbus
/// consensus
#[allow(clippy::too_many_arguments)]
fn start_consensus<RuntimeApi, Executor>(
	client: Arc<FullClient<RuntimeApi, Executor>>,
	block_import: ParachainBlockImport<RuntimeApi, Executor>,
	prometheus_registry: Option<&Registry>,
	telemetry: Option<TelemetryHandle>,
	task_manager: &TaskManager,
	relay_chain_interface: Arc<dyn RelayChainInterface>,
	transaction_pool: Arc<sc_transaction_pool::FullPool<Block, FullClient<RuntimeApi, Executor>>>,
	sync_oracle: Arc<SyncingService<Block>>,
	keystore: KeystorePtr,
	relay_chain_slot_duration: Duration,
	para_id: ParaId,
	collator_key: CollatorPair,
	overseer_handle: OverseerHandle,
	announce_block: Arc<dyn Fn(Hash, Option<Vec<u8>>) + Send + Sync>,
) -> Result<(), sc_service::Error>
where
	RuntimeApi:
		ConstructRuntimeApi<Block, FullClient<RuntimeApi, Executor>> + Send + Sync + 'static,
	RuntimeApi::RuntimeApi: RuntimeApiCollection,
	Executor: sc_executor::NativeExecutionDispatch + 'static,
{
	use cumulus_client_consensus_aura::collators::basic::{
		self as basic_aura, Params as BasicAuraParams,
	};

	// NOTE: because we use Aura here explicitly, we can use
	// `CollatorSybilResistance::Resistant` when starting the network.

	let slot_duration = cumulus_client_consensus_aura::slot_duration(&*client)?;

	let proposer_factory = sc_basic_authorship::ProposerFactory::with_proof_recording(
		task_manager.spawn_handle(),
		client.clone(),
		transaction_pool,
		prometheus_registry,
		telemetry.clone(),
	);

	let proposer = Proposer::new(proposer_factory);

	let collator_service = CollatorService::new(
		client.clone(),
		Arc::new(task_manager.spawn_handle()),
		announce_block,
		client.clone(),
	);

	let params = BasicAuraParams {
		create_inherent_data_providers: move |_, ()| async move { Ok(()) },
		block_import,
		para_client: client,
		relay_client: relay_chain_interface,
		sync_oracle,
		keystore,
		collator_key,
		para_id,
		overseer_handle,
		slot_duration,
		relay_chain_slot_duration,
		proposer,
		collator_service,
		// Very limited proposal time.
		authoring_duration: Duration::from_millis(500),
		collation_request_receiver: None,
	};

	let fut =
		basic_aura::run::<Block, sp_consensus_aura::sr25519::AuthorityPair, _, _, _, _, _, _, _>(
			params,
		);
	task_manager
		.spawn_essential_handle()
		.spawn("aura", None, fut);

	Ok(())
}