Newer
Older
// 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/>.
//! Polkadot service. Specialized wrapper over substrate service.
use polkadot_primitives::{parachain, Hash, BlockId};
use polkadot_runtime::GenesisConfig;
use polkadot_network::{gossip::{self as network_gossip, Known}, validation::ValidationNetwork};
use service::{error::{Error as ServiceError}, Configuration, ServiceBuilder};
use transaction_pool::txpool::{Pool as TransactionPool};
use babe::{import_queue, start_babe, Config};
use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
use inherents::InherentDataProviders;
pub use service::{AbstractService, Roles, PruningMode, TransactionPoolOptions, Error};
pub use service::{ServiceBuilderExport, ServiceBuilderImport, ServiceBuilderRevert};
pub use service::config::full_version_from_strs;
pub use client::{backend::Backend, runtime_api::{Core as CoreApi, ConstructRuntimeApi}, ExecutionStrategy, CallExecutor};
pub use consensus_common::SelectChain;
pub use polkadot_network::{PolkadotProtocol, NetworkService};
pub use polkadot_primitives::parachain::{CollatorId, ParachainHost};
pub use polkadot_primitives::Block;
pub use polkadot_runtime::RuntimeApi;
pub use primitives::Blake2Hasher;
pub use sr_primitives::traits::ProvideRuntimeApi;
pub use substrate_network::specialization::NetworkSpecialization;
pub use consensus::run_validation_worker;
/// Polkadot-specific configuration.
pub struct CustomConfiguration {
/// Set to `Some` with a collator `CollatorId` and desired parachain
/// if the network protocol should be started in collator mode.
pub collating_for: Option<(CollatorId, parachain::Id)>,
/// Maximal `block_data` size.
pub max_block_data_size: Option<u64>,
}
impl Default for CustomConfiguration {
fn default() -> Self {
Self {
collating_for: None,
/// Chain API type for the transaction pool.
pub type TxChainApi<Backend, Executor> = transaction_pool::ChainApi<
client::Client<Backend, Executor, Block, RuntimeApi>,
/// Starts a `ServiceBuilder` for a full service.
///
/// Use this macro if you don't actually need the full service, but just the builder in order to
/// be able to perform chain operations.
macro_rules! new_full_start {
($config:expr) => {{
let mut import_setup = None;
let inherent_data_providers = inherents::InherentDataProviders::new();
let mut tasks_to_spawn = None;
let builder = service::ServiceBuilder::new_full::<
Block, RuntimeApi, polkadot_executor::Executor
>($config)?
.with_select_chain(|_config, client| {
#[allow(deprecated)]
Ok(client::LongestChain::new(client.backend().clone()))
})?
.with_transaction_pool(|config, client|
Ok(transaction_pool::txpool::Pool::new(config, transaction_pool::ChainApi::new(client)))
)?
.with_import_queue(|_config, client, mut select_chain, transaction_pool| {
let select_chain = select_chain.take()
.ok_or_else(|| service::Error::SelectChainRequired)?;
grandpa::block_import::<_, _, _, RuntimeApi, _, _>(
client.clone(), client.clone(), select_chain
)?;
let justification_import = block_import.clone();
let (import_queue, babe_link, babe_block_import, pruning_task) = babe::import_queue(
babe::Config::get_or_compute(&*client)?,
Some(Box::new(justification_import)),
inherent_data_providers.clone(),
Some(transaction_pool)
import_setup = Some((babe_block_import.clone(), link_half, babe_link));
tasks_to_spawn = Some(vec![Box::new(pruning_task)]);
})?;
(builder, import_setup, inherent_data_providers, tasks_to_spawn)
}}
}
/// Builds a new object suitable for chain operations.
pub fn new_chain_ops(config: Configuration<impl Send + Default + 'static, GenesisConfig>)
-> Result<impl ServiceBuilderExport + ServiceBuilderImport + ServiceBuilderRevert, ServiceError>
{
Ok(new_full_start!(config).0)
}
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
/// Builds a new service for a full client.
pub fn new_full(config: Configuration<CustomConfiguration, GenesisConfig>)
-> Result<impl AbstractService<
Block = Block, RuntimeApi = RuntimeApi, NetworkSpecialization = PolkadotProtocol,
Backend = impl Backend<Block, Blake2Hasher> + 'static,
SelectChain = impl SelectChain<Block>,
CallExecutor = impl CallExecutor<Block, Blake2Hasher> + Clone + Send + Sync + 'static,
>, ServiceError>
{
let (builder, mut import_setup, inherent_data_providers, mut tasks_to_spawn) = new_full_start!(config);
let service = builder
.with_network_protocol(|config| Ok(PolkadotProtocol::new(config.custom.collating_for.clone())))?
.with_finality_proof_provider(|client|
Ok(Arc::new(GrandpaFinalityProofProvider::new(client.clone(), client)) as _)
)?
.build()?;
let (block_import, link_half, babe_link) = import_setup.take()
.expect("Link Half and Block Import are present for Full Services or setup failed before. qed");
// spawn any futures that were created in the previous setup steps
if let Some(tasks) = tasks_to_spawn.take() {
for task in tasks {
service.spawn_task(
task.select(service.on_exit())
.map(|_| ())
.map_err(|_| ())
);
}
}
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
if service.config().custom.collating_for.is_some() {
info!(
"The node cannot start as an authority because it is also configured to run as a collator."
);
return Ok(service);
}
let client = service.client();
let known_oracle = client.clone();
let select_chain = if let Some(select_chain) = service.select_chain() {
select_chain
} else {
info!("The node cannot start as an authority because it can't select chain.");
return Ok(service);
};
let gossip_validator_select_chain = select_chain.clone();
let gossip_validator = network_gossip::register_validator(
service.network(),
move |block_hash: &Hash| {
use client::BlockStatus;
match known_oracle.block_status(&BlockId::hash(*block_hash)) {
Err(_) | Ok(BlockStatus::Unknown) | Ok(BlockStatus::Queued) => None,
Ok(BlockStatus::KnownBad) => Some(Known::Bad),
Ok(BlockStatus::InChainWithState) | Ok(BlockStatus::InChainPruned) => {
match gossip_validator_select_chain.leaves() {
Err(_) => None,
Ok(leaves) => if leaves.contains(block_hash) {
Some(Known::Leaf)
} else {
Some(Known::Old)
},
}
}
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
);
if service.config().roles.is_authority() {
let extrinsic_store = {
use std::path::PathBuf;
let mut path = PathBuf::from(service.config().database_path.clone());
path.push("availability");
av_store::Store::new(::av_store::Config {
cache_size: None,
path,
})?
};
// collator connections and validation network both fulfilled by this
let validation_network = ValidationNetwork::new(
service.network(),
service.on_exit(),
gossip_validator,
service.client(),
polkadot_network::validation::WrappedExecutor(service.spawn_task_handle()),
);
let proposer = consensus::ProposerFactory::new(
client.clone(),
select_chain.clone(),
validation_network.clone(),
validation_network,
service.transaction_pool(),
Arc::new(service.spawn_task_handle()),
service.keystore(),
extrinsic_store,
polkadot_runtime::constants::time::SLOT_DURATION,
service.config().custom.max_block_data_size,
);
let client = service.client();
let select_chain = service.select_chain().ok_or(ServiceError::SelectChainRequired)?;
let babe_config = babe::BabeParams {
config: Config::get_or_compute(&*client)?,
keystore: service.keystore(),
client,
select_chain,
block_import,
env: proposer,
sync_oracle: service.network(),
inherent_data_providers: inherent_data_providers.clone(),
force_authoring: service.config().force_authoring,
time_source: babe_link,
};
let babe = start_babe(babe_config)?;
let select = babe.select(service.on_exit()).then(|_| Ok(()));
service.spawn_essential_task(Box::new(select));
} else {
network_gossip::register_non_authority_validator(service.network());
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
let config = grandpa::Config {
// FIXME substrate#1578 make this available through chainspec
gossip_duration: Duration::from_millis(333),
justification_period: 4096,
name: Some(service.config().name.clone()),
keystore: Some(service.keystore()),
};
match (service.config().roles.is_authority(), service.config().disable_grandpa) {
(false, false) => {
// start the lightweight GRANDPA observer
service.spawn_task(Box::new(grandpa::run_grandpa_observer(
config,
link_half,
service.network(),
service.on_exit(),
)?));
},
(true, false) => {
// start the full GRANDPA voter
let grandpa_config = grandpa::GrandpaParams {
config: config,
link: link_half,
network: service.network(),
inherent_data_providers: inherent_data_providers.clone(),
on_exit: service.on_exit(),
telemetry_on_connect: Some(service.telemetry_on_connect_stream()),
};
service.spawn_essential_task(Box::new(grandpa::run_grandpa_voter(grandpa_config)?));
},
(_, true) => {
grandpa::setup_disabled_grandpa(
service.client(),
&inherent_data_providers,
service.network(),
)?;
},
}
Ok(service)
}
/// Builds a new service for a light client.
pub fn new_light(config: Configuration<CustomConfiguration, GenesisConfig>)
-> Result<impl AbstractService<
Block = Block, RuntimeApi = RuntimeApi, NetworkSpecialization = PolkadotProtocol,
Backend = impl Backend<Block, Blake2Hasher> + 'static,
SelectChain = impl SelectChain<Block>,
CallExecutor = impl CallExecutor<Block, Blake2Hasher> + Clone + Send + Sync + 'static,
>, ServiceError>
{
let inherent_data_providers = InherentDataProviders::new();
ServiceBuilder::new_light::<Block, RuntimeApi, polkadot_executor::Executor>(config)?
.with_select_chain(|_config, client| {
#[allow(deprecated)]
Ok(LongestChain::new(client.backend().clone()))
})?
.with_transaction_pool(|config, client|
Ok(TransactionPool::new(config, transaction_pool::ChainApi::new(client)))
)?
.with_import_queue_and_fprb(|_config, client, _select_chain, transaction_pool| {
#[allow(deprecated)]
let fetch_checker = client.backend().blockchain().fetcher()
.upgrade()
.map(|fetcher| fetcher.checker().clone())
.ok_or_else(|| "Trying to start light import queue without active fetch checker")?;
let block_import = grandpa::light_block_import::<_, _, _, RuntimeApi, _>(
client.clone(), Arc::new(fetch_checker), client.clone()
)?;
let finality_proof_import = block_import.clone();
let finality_proof_request_builder =
finality_proof_import.create_finality_proof_request_builder();
// FIXME: pruning task isn't started since light client doesn't do `AuthoritySetup`.
let (import_queue, ..) = import_queue(
Config::get_or_compute(&*client)?,
block_import,
None,
Some(Box::new(finality_proof_import)),
client.clone(),
client,
inherent_data_providers.clone(),
Some(transaction_pool)
)?;
Ok((import_queue, finality_proof_request_builder))
})?
.with_network_protocol(|config| Ok(PolkadotProtocol::new(config.custom.collating_for.clone())))?
.with_finality_proof_provider(|client|
Ok(Arc::new(GrandpaFinalityProofProvider::new(client.clone(), client)) as _)
)?
.build()