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
use ethcore::block_import_error::BlockImportError;
use ethcore::block_status::BlockStatus;
use ethcore::client::ClientReport;
use ethcore::ids::BlockId;
use ethcore::header::Header;
use ethcore::verification::queue::{self, HeaderQueue};
use ethcore::transaction::PendingTransaction;
use ethcore::blockchain_info::BlockChainInfo;
use ethcore::spec::Spec;
use ethcore::service::ClientIoMessage;
use ethcore::encoded;
use io::IoChannel;
use util::hash::{H256, H256FastMap};
use util::{Bytes, Mutex, RwLock};
use provider::Provider;
use request;
use self::header_chain::HeaderChain;
pub use self::service::Service;
mod header_chain;
mod service;
#[derive(Debug, Default, Clone)]
pub struct Config {
pub queue: queue::Config,
}
pub trait LightChainClient: Send + Sync {
fn chain_info(&self) -> BlockChainInfo;
fn queue_header(&self, header: Header) -> Result<H256, BlockImportError>;
fn is_known(&self, hash: &H256) -> bool;
fn clear_queue(&self);
fn flush_queue(&self);
fn queue_info(&self) -> queue::QueueInfo;
fn cht_root(&self, i: usize) -> Option<H256>;
}
pub struct Client {
queue: HeaderQueue,
chain: HeaderChain,
tx_pool: Mutex<H256FastMap<PendingTransaction>>,
report: RwLock<ClientReport>,
import_lock: Mutex<()>,
}
impl Client {
pub fn new(config: Config, spec: &Spec, io_channel: IoChannel<ClientIoMessage>) -> Self {
Client {
queue: HeaderQueue::new(config.queue, spec.engine.clone(), io_channel, true),
chain: HeaderChain::new(&::rlp::encode(&spec.genesis_header())),
tx_pool: Mutex::new(Default::default()),
report: RwLock::new(ClientReport::default()),
import_lock: Mutex::new(()),
}
}
pub fn import_header(&self, header: Header) -> Result<H256, BlockImportError> {
self.queue.import(header).map_err(Into::into)
}
pub fn import_own_transaction(&self, tx: PendingTransaction) {
self.tx_pool.lock().insert(tx.transaction.hash(), tx);
}
pub fn ready_transactions(&self) -> Vec<PendingTransaction> {
let best_num = self.chain.best_block().number;
self.tx_pool.lock()
.values()
.filter(|t| t.min_block.as_ref().map_or(true, |x| x <= &best_num))
.cloned()
.collect()
}
pub fn status(&self, hash: &H256) -> BlockStatus {
match self.queue.status(hash) {
queue::Status::Unknown => self.chain.status(hash),
other => other.into(),
}
}
pub fn chain_info(&self) -> BlockChainInfo {
let best_block = self.chain.best_block();
let first_block = self.chain.first_block();
let genesis_hash = self.chain.genesis_hash();
BlockChainInfo {
total_difficulty: best_block.total_difficulty,
pending_total_difficulty: best_block.total_difficulty + self.queue.total_difficulty(),
genesis_hash: genesis_hash,
best_block_hash: best_block.hash,
best_block_number: best_block.number,
ancient_block_hash: if first_block.is_some() { Some(genesis_hash) } else { None },
ancient_block_number: if first_block.is_some() { Some(0) } else { None },
first_block_hash: first_block.as_ref().map(|first| first.hash),
first_block_number: first_block.as_ref().map(|first| first.number),
}
}
pub fn queue_info(&self) -> queue::QueueInfo {
self.queue.queue_info()
}
pub fn get_header(&self, id: BlockId) -> Option<Bytes> {
self.chain.get_header(id)
}
pub fn flush_queue(&self) {
self.queue.flush()
}
pub fn cht_root(&self, i: usize) -> Option<H256> {
self.chain.cht_root(i)
}
pub fn import_verified(&self) {
const MAX: usize = 256;
let _lock = self.import_lock.lock();
let mut bad = Vec::new();
let mut good = Vec::new();
for verified_header in self.queue.drain(MAX) {
let (num, hash) = (verified_header.number(), verified_header.hash());
match self.chain.insert(::rlp::encode(&verified_header).to_vec()) {
Ok(()) => {
good.push(hash);
self.report.write().blocks_imported += 1;
}
Err(e) => {
debug!(target: "client", "Error importing header {:?}: {}", (num, hash), e);
bad.push(hash);
}
}
}
self.queue.mark_as_bad(&bad);
self.queue.mark_as_good(&good);
}
pub fn report(&self) -> ClientReport {
::std::mem::replace(&mut *self.report.write(), ClientReport::default())
}
pub fn chain_mem_used(&self) -> usize {
use util::HeapSizeOf;
self.chain.heap_size_of_children()
}
}
impl LightChainClient for Client {
fn chain_info(&self) -> BlockChainInfo { Client::chain_info(self) }
fn queue_header(&self, header: Header) -> Result<H256, BlockImportError> {
self.import_header(header)
}
fn is_known(&self, hash: &H256) -> bool {
self.status(hash) == BlockStatus::InChain
}
fn clear_queue(&self) {
self.queue.clear()
}
fn flush_queue(&self) {
Client::flush_queue(self);
}
fn queue_info(&self) -> queue::QueueInfo {
self.queue.queue_info()
}
fn cht_root(&self, i: usize) -> Option<H256> {
Client::cht_root(self, i)
}
}
impl Provider for Client {
fn chain_info(&self) -> BlockChainInfo {
Client::chain_info(self)
}
fn reorg_depth(&self, _a: &H256, _b: &H256) -> Option<u64> {
None
}
fn earliest_state(&self) -> Option<u64> {
None
}
fn block_header(&self, id: BlockId) -> Option<encoded::Header> {
self.chain.get_header(id).map(encoded::Header::new)
}
fn block_body(&self, _id: BlockId) -> Option<encoded::Body> {
None
}
fn block_receipts(&self, _hash: &H256) -> Option<Bytes> {
None
}
fn state_proof(&self, _req: request::StateProof) -> Vec<Bytes> {
Vec::new()
}
fn contract_code(&self, _req: request::ContractCode) -> Bytes {
Vec::new()
}
fn header_proof(&self, _req: request::HeaderProof) -> Option<(encoded::Header, Vec<Bytes>)> {
None
}
fn ready_transactions(&self) -> Vec<PendingTransaction> {
Vec::new()
}
}