Update LICENSE Bitencourt

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1 mod bloom;
2 mod printer;
3 mod reader;
4 mod peer;
5 mod bgp_client;
6 mod timeout_stream;
7 mod datastore;
8
9 use std::env;
10 use std::collections::HashMap;
11 use std::sync::{Arc, Mutex};
12 use std::sync::atomic::{Ordering, AtomicBool};
13 use std::time::{Duration, Instant};
14 use std::net::{SocketAddr, ToSocketAddrs};
15
16 use bitcoin::blockdata::block::Block;
17 use bitcoin::blockdata::constants::genesis_block;
18 use bitcoin::hash_types::{BlockHash};
19 use bitcoin::network::constants::{Network, ServiceFlags};
20 use bitcoin::network::message::NetworkMessage;
21 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory};
22 //use bitcoin::util::hash::BitcoinHash;
23
24 use printer::{Printer, Stat};
25 use peer::Peer;
26 use datastore::{AddressState, Store, U64Setting, RegexSetting};
27 use timeout_stream::TimeoutStream;
28 use rand::Rng;
29 use bgp_client::BGPClient;
30
31 use tokio::prelude::*;
32 use tokio::timer::Delay;
33
34 static mut REQUEST_BLOCK: Option<Box<Mutex<Arc<(u64, BlockHash, Block)>>>> = None;
35 static mut HIGHEST_HEADER: Option<Box<Mutex<(BlockHash, u64)>>> = None;
36 static mut HEADER_MAP: Option<Box<Mutex<HashMap<BlockHash, u64>>>> = None;
37 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, BlockHash>>>> = None;
38 static mut DATA_STORE: Option<Box> = None;
39 static mut PRINTER: Option<Box> = None;
40 static mut TOR_PROXY: Option = None;
41 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
42 static SCANNING: AtomicBool = AtomicBool::new(false);
43
44
45 use std::alloc::{GlobalAlloc, Layout, System};
46 use std::ptr;
47 use std::sync::atomic::AtomicUsize;
48
49 // We keep track of all memory allocated by Rust code, refusing new allocations if it exceeds
50 // 1.75GB.
51 //
52 // Note that while Rust's std, in general, should panic in response to a null allocation, it
53 // is totally conceivable that some code will instead dereference this null pointer, which
54 // would violate our guarantees that Rust modules should never crash the entire application.
55 //
56 // In the future, as upstream Rust explores a safer allocation API (eg the Alloc API which
57 // returns Results instead of raw pointers, or redefining the GlobalAlloc API to allow
58 // panic!()s inside of alloc calls), we should switch to those, however these APIs are
59 // currently unstable.
60 const TOTAL_MEM_LIMIT_BYTES: usize = (1024 + 756) * 1024 * 1024;
61 static TOTAL_MEM_ALLOCD: AtomicUsize = AtomicUsize::new(0);
62 struct MemoryLimitingAllocator;
63 unsafe impl GlobalAlloc for MemoryLimitingAllocator {
64 unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
65 let len = layout.size();
66 if len > TOTAL_MEM_LIMIT_BYTES {
67 return ptr::null_mut();
68 }
69 if TOTAL_MEM_ALLOCD.fetch_add(len, Ordering::AcqRel) + len > TOTAL_MEM_LIMIT_BYTES {
70 TOTAL_MEM_ALLOCD.fetch_sub(len, Ordering::AcqRel);
71 return ptr::null_mut();
72 }
73 System.alloc(layout)
74 }
75
76 unsafe fn dealloc(&self, ptr: mut u8, layout: Layout) {
77 System.dealloc(ptr, layout);
78 TOTAL_MEM_ALLOCD.fetch_sub(layout.size(), Ordering::AcqRel);
79 }
80 }
81
82 #[global_allocator]
83 static ALLOC: MemoryLimitingAllocator = MemoryLimitingAllocator;
84
85
86 struct PeerState {
87 request: Arc<(u64, BlockHash, Block)>,
88 pong_nonce: u64,
89 node_services: u64,
90 msg: (String, bool),
91 fail_reason: AddressState,
92 recvd_version: bool,
93 recvd_verack: bool,
94 recvd_pong: bool,
95 recvd_addrs: bool,
96 recvd_block: bool,
97 }
98
99 pub fn scan_node(scan_time: Instant, node: SocketAddr, manual: bool) {
100 if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
101 let printer = unsafe { PRINTER.as_ref().unwrap() };
102 let store = unsafe { DATA_STORE.as_ref().unwrap() };
103
104 let mut rng = rand::thread_rng();
105 let peer_state = Arc::new(Mutex::new(PeerState {
106 recvd_version: false,
107 recvd_verack: false,
108 recvd_pong: false,
109 recvd_addrs: false,
110 recvd_block: false,
111 pong_nonce: rng.gen(),
112 node_services: 0,
113 fail_reason: AddressState::Timeout,
114 msg: (String::new(), false),
115 request: Arc::clone(&unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap()),
116 }));
117 let err_peer_state = Arc::clone(&peer_state);
118 let final_peer_state = Arc::clone(&peer_state);
119
120 let peer = Delay::new(scan_time).then(move || {
121 printer.set_stat(Stat::NewConnection);
122 let timeout = store.get_u64(U64Setting::RunTimeout);
123 Peer::new(node.clone(), unsafe { TOR_PROXY.as_ref().unwrap() }, Duration::from_secs(timeout), printer)
124 });
125 tokio::spawn(peer.and_then(move |(mut write, read)| {
126 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout)))
127 .map_err(|| ()).for_each(move |msg| {
128 let mut state_lock = peer_state.lock().unwrap();
129 macro_rules! check_set_flag {
130 ($recvd_flag: ident, $msg: expr) => { {
131 if state_lock.$recvd_flag {
132 state_lock.fail_reason = AddressState::ProtocolViolation;
133 state_lock.msg = (format!("due to dup {}", $msg), true);
134 state_lock.$recvd_flag = false;
135 return future::err(());
136 }
137 state_lock.$recvd_flag = true;
138 } }
139 }
140 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
141 match msg {
142 Some(NetworkMessage::Version(ver)) => {
143 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 10082 {
144 state_lock.fail_reason = AddressState::HighBlockCount;
145 return future::err(());
146 }
147 let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
148 if (ver.start_height as u64) < state_lock.request.0 {
149 state_lock.msg = (format!("({} < {})", ver.start_height, state_lock.request.0), true);
150 state_lock.fail_reason = AddressState::LowBlockCount;
151 return future::err(());
152 }
153 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
154 if (ver.version as u64) < min_version {
155 state_lock.msg = (format!("({} < {})", ver.version, min_version), true);
156 state_lock.fail_reason = AddressState::LowVersion;
157 return future::err(());
158 }
159 if !ver.services.has(ServiceFlags::NETWORK) && !ver.services.has(ServiceFlags::NETWORK_LIMITED) {
160 state_lock.msg = (format!("({}: services {:x})", safe_ua, ver.services), true);
161 state_lock.fail_reason = AddressState::NotFullNode;
162 return future::err(());
163 }
164 if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
165 state_lock.msg = (format!("subver {}", safe_ua), true);
166 state_lock.fail_reason = AddressState::BadVersion;
167 return future::err(());
168 }
169 check_set_flag!(recvd_version, "version");
170 state_lock.node_services = ver.services.as_u64();
171 state_lock.msg = (format!("(subver: {})", safe_ua), false);
172 if let Err() = write.try_send(NetworkMessage::SendAddrV2) {
173 return future::err(());
174 }
175 if let Err() = write.try_send(NetworkMessage::Verack) {
176 return future::err(());
177 }
178 },
179 Some(NetworkMessage::Verack) => {
180 check_set_flag!(recvd_verack, "verack");
181 if let Err() = write.try_send(NetworkMessage::Ping(state_lock.pong_nonce)) {
182 return future::err(());
183 }
184 },
185 Some(NetworkMessage::Ping(v)) => {
186 if let Err() = write.try_send(NetworkMessage::Pong(v)) {
187 return future::err(())
188 }
189 },
190 Some(NetworkMessage::Pong(v)) => {
191 if v != state_lock.pong_nonce {
192 state_lock.fail_reason = AddressState::ProtocolViolation;
193 state_lock.msg = ("due to invalid pong nonce".to_string(), true);
194 return future::err(());
195 }
196 check_set_flag!(recvd_pong, "pong");
197 if let Err() = write.try_send(NetworkMessage::GetAddr) {
198 return future::err(());
199 }
200 },
201 Some(NetworkMessage::Addr(addrs)) => {
202 if addrs.len() > 1000 {
203 state_lock.fail_reason = AddressState::ProtocolViolation;
204 state_lock.msg = (format!("due to oversized addr: {}", addrs.len()), true);
205 state_lock.recvd_addrs = false;
206 return future::err(());
207 }
208 if addrs.len() > 10 {
209 if !state_lock.recvd_addrs {
210 if let Err() = write.try_send(NetworkMessage::GetData(vec![Inventory::WitnessBlock(state_lock.request.1)])) {
211 return future::err(());
212 }
213 }
214 state_lock.recvd_addrs = true;
215 }
216 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
217 },
218 Some(NetworkMessage::AddrV2(addrs)) => {
219 if addrs.len() > 1000 {
220 state_lock.fail_reason = AddressState::ProtocolViolation;
221 state_lock.msg = (format!("due to oversized addr: {}", addrs.len()), true);
222 state_lock.recvd_addrs = false;
223 return future::err(());
224 }
225 if addrs.len() > 10 {
226 if !state_lock.recvd_addrs {
227 if let Err() = write.try_send(NetworkMessage::GetData(vec![Inventory::WitnessBlock(state_lock.request.1)])) {
228 return future::err(());
229 }
230 }
231 state_lock.recvd_addrs = true;
232 }
233 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes_v2(&addrs);
234 },
235 Some(NetworkMessage::Block(block)) => {
236 if block != state_lock.request.2 {
237 state_lock.fail_reason = AddressState::ProtocolViolation;
238 state_lock.msg = ("due to bad block".to_string(), true);
239 return future::err(());
240 }
241 check_set_flag!(recvd_block, "block");
242 return future::err(());
243 },
244 Some(NetworkMessage::Inv(invs)) => {
245 for inv in invs {
246 match inv {
247 Inventory::Transaction() | Inventory::WitnessTransaction() => {
248 state_lock.fail_reason = AddressState::EvilNode;
249 state_lock.msg = ("due to unrequested inv tx".to_string(), true);
250 return future::err(());
251 }
252 _ => {},
253 }
254 }
255 },
256 Some(NetworkMessage::Tx()) => {
257 state_lock.fail_reason = AddressState::EvilNode;
258 state_lock.msg = ("due to unrequested transaction".to_string(), true);
259 return future::err(());
260 },
261 Some(NetworkMessage::Unknown { command, .. }) => {
262 if command.as_ref() == "gnop" {
263 let mut state_lock = err_peer_state.lock().unwrap();
264 state_lock.msg = (format!("(bad msg type {})", command), true);
265 state_lock.fail_reason = AddressState::EvilNode;
266 return future::err(());
267 }
268 },
269 _ => {},
270 }
271 future::ok(())
272 }).then(|| {
273 future::err(())
274 })
275 }).then(move |: Result<(), ()>| {
276 let printer = unsafe { PRINTER.as_ref().unwrap() };
277 let store = unsafe { DATA_STORE.as_ref().unwrap() };
278 printer.set_stat(Stat::ConnectionClosed);
279
280 let mut state_lock = final_peer_state.lock().unwrap();
281 if state_lock.recvd_version && state_lock.recvd_verack && state_lock.recvd_pong &&
282 state_lock.recvd_addrs && state_lock.recvd_block {
283 let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
284 if manual || (old_state != AddressState::Good && state_lock.msg.0 != "") {
285 printer.add_line(format!("Updating {} from {} to Good {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
286 }
287 } else {
288 assert!(state_lock.fail_reason != AddressState::Good);
289 if state_lock.fail_reason == AddressState::TimeoutDuringRequest && state_lock.recvd_version && state_lock.recvd_verack {
290 if !state_lock.recvd_pong {
291 state_lock.fail_reason = AddressState::TimeoutAwaitingPong;
292 } else if !state_lock.recvd_addrs {
293 state_lock.fail_reason = AddressState::TimeoutAwaitingAddr;
294 } else if !state_lock.recvd_block {
295 state_lock.fail_reason = AddressState::TimeoutAwaitingBlock;
296 }
297 }
298 let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
299 if (manual || old_state != state_lock.fail_reason) && state_lock.fail_reason == AddressState::TimeoutDuringRequest {
300 printer.add_line(format!("Updating {} from {} to Timeout During Request (ver: {}, vack: {})",
301 node, old_state.to_str(), state_lock.recvd_version, state_lock.recvd_verack), true);
302 } else if manual || (old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1) {
303 printer.add_line(format!("Updating {} from {} to {} {}", node, old_state.to_str(), state_lock.fail_reason.to_str(), &state_lock.msg.0), state_lock.msg.1);
304 }
305 }
306 future::ok(())
307 }));
308 }
309
310 fn poll_dnsseeds(bgp_client: Arc) {
311 tokio::spawn(future::lazy(|| {
312 let printer = unsafe { PRINTER.as_ref().unwrap() };
313 let store = unsafe { DATA_STORE.as_ref().unwrap() };
314
315 let mut new_addrs = 0;
316 for seed in ["seed.bitcoin.sipa.be", "dnsseed.bitcoin.dashjr.org", "seed.bitcoinstats.com", "seed.bitcoin.jonasschnelli.ch", "seed.btc.petertodd.org", "seed.bitcoin.sprovoost.nl", "dnsseed.emzy.de"].iter() {
317 new_addrs += store.add_fresh_addrs((*seed, 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
318 new_addrs += store.add_fresh_addrs((("x9.".to_string() + seed).as_str(), 8333u16).to_socket_addrs().unwrap_or(Vec::new().into_iter()));
319 }
320 printer.add_line(format!("Added {} new addresses from other DNS seeds", new_addrs), false);
321 Delay::new(Instant::now() + Duration::from_secs(60)).then(|| {
322 let store = unsafe { DATA_STORE.as_ref().unwrap() };
323 let dns_future = store.write_dns(Arc::clone(&bgp_client));
324 store.save_data().join(dns_future).then(|| {
325 if !START_SHUTDOWN.load(Ordering::Relaxed) {
326 poll_dnsseeds(bgp_client);
327 } else {
328 bgp_client.disconnect();
329 }
330 future::ok(())
331 })
332 })
333 }));
334 }
335
336 fn scan_net() {
337 tokio::spawn(future::lazy(|| {
338 let printer = unsafe { PRINTER.as_ref().unwrap() };
339 let store = unsafe { DATA_STORE.as_ref().unwrap() };
340
341 let start_time = Instant::now();
342 let mut scan_nodes = store.get_next_scan_nodes();
343 printer.add_line(format!("Got {} addresses to scan", scan_nodes.len()), false);
344 if !scan_nodes.is_empty() {
345 let per_iter_time = Duration::from_millis(datastore::SECS_PER_SCAN_RESULTS * 1000 / scan_nodes.len() as u64);
346 let mut iter_time = start_time;
347
348 for node in scan_nodes.drain(..) {
349 scan_node(iter_time, node, false);
350 iter_time += per_iter_time;
351 }
352 }
353 Delay::new(start_time + Duration::from_secs(datastore::SECS_PER_SCAN_RESULTS)).then(move || {
354 if !START_SHUTDOWN.load(Ordering::Relaxed) {
355 scan_net();
356 }
357 future::ok(())
358 })
359 }));
360 }
361
362 fn make_trusted_conn(trusted_sockaddr: SocketAddr, bgp_client: Arc) {
363 let printer = unsafe { PRINTER.as_ref().unwrap() };
364 let trusted_peer = Peer::new(trusted_sockaddr.clone(), unsafe { TOR_PROXY.as_ref().unwrap() }, Duration::from_secs(600), printer);
365 let bgp_reload = Arc::clone(&bgp_client);
366 tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
367 printer.add_line("Connected to local peer".to_string(), false);
368 let mut starting_height = 0;
369 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|| { () }).for_each(move |msg| {
370 if START_SHUTDOWN.load(Ordering::Relaxed) {
371 return future::err(());
372 }
373 match msg {
374 Some(NetworkMessage::Version(ver)) => {
375 if let Err() = trusted_write.try_send(NetworkMessage::Verack) {
376 return future::err(())
377 }
378 starting_height = ver.start_height;
379 },
380 Some(NetworkMessage::Verack) => {
381 if let Err() = trusted_write.try_send(NetworkMessage::SendHeaders) {
382 return future::err(());
383 }
384 if let Err() = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
385 version: 70015,
386 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
387 stop_hash: Default::default(),
388 })) {
389 return future::err(());
390 }
391 if let Err() = trusted_write.try_send(NetworkMessage::GetAddr) {
392 return future::err(());
393 }
394 },
395 Some(NetworkMessage::Addr(addrs)) => {
396 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
397 },
398 Some(NetworkMessage::Headers(headers)) => {
399 if headers.is_empty() {
400 return future::ok(());
401 }
402 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
403 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
404
405 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
406 for i in 0..headers.len() {
407 let hash = headers[i].block_hash();
408 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
409 return future::err(());
410 }
411 header_map.insert(headers[i].block_hash(), height + 1 + (i as u64));
412 height_map.insert(height + 1 + (i as u64), headers[i].block_hash());
413 }
414
415 let top_height = height + headers.len() as u64;
416 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
417 = (headers.last().unwrap().block_hash(), top_height);
418 printer.set_stat(printer::Stat::HeaderCount(top_height));
419
420 if top_height >= starting_height as u64 {
421 if let Err() = trusted_write.try_send(NetworkMessage::GetData(vec![
422 Inventory::WitnessBlock(height_map.get(&(top_height - 216)).unwrap().clone())
423 ])) {
424 return future::err(());
425 }
426 }
427 } else {
428 // Wat? Lets start again...
429 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
430 }
431 if let Err() = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
432 version: 70015,
433 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
434 stop_hash: Default::default(),
435 })) {
436 return future::err(())
437 }
438 },
439 Some(NetworkMessage::Block(block)) => {
440 let hash = block.block_hash();
441 let header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
442 let height = *header_map.get(&hash).expect("Got loose block from trusted peer we coulnd't have requested");
443 if height == unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 216 {
444 *unsafe { REQUEST_BLOCK.as_ref().unwrap() }.lock().unwrap() = Arc::new((height, hash, block));
445 if !SCANNING.swap(true, Ordering::SeqCst) {
446 scan_net();
447 poll_dnsseeds(Arc::clone(&bgp_client));
448 }
449 }
450 },
451 Some(NetworkMessage::Ping(v)) => {
452 if let Err() = trusted_write.try_send(NetworkMessage::Pong(v)) {
453 return future::err(())
454 }
455 },
456 _ => {},
457 }
458 future::ok(())
459 }).then(|| {
460 future::err(())
461 })
462 }).then(move |: Result<(), ()>| {
463 if !START_SHUTDOWN.load(Ordering::Relaxed) {
464 printer.add_line("Lost connection from trusted peer".to_string(), true);
465 make_trusted_conn(trusted_sockaddr, bgp_reload);
466 }
467 future::ok(())
468 }));
469 }
470
471 fn main() {
472 if env::args().len() != 6 {
473 println!("USAGE: dnsseed-rust datastore localPeerAddress tor_proxy_addr bgp_peer bgp_peer_asn");
474 return;
475 }
476
477 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
478 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::with_capacity(600000)))) };
479 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).block_hash(), 0);
480 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).block_hash());
481 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).block_hash(), 0)))) };
482 unsafe { REQUEST_BLOCK = Some(Box::new(Mutex::new(Arc::new((0, genesis_block(Network::Bitcoin).block_hash(), genesis_block(Network::Bitcoin)))))) };
483
484 let trt = tokio::runtime::Builder::new()
485 .blocking_threads(2).core_threads(num_cpus::get().max(1) + 1)
486 .build().unwrap();
487
488 let _ = trt.block_on_all(future::lazy(|| {
489 let mut args = env::args();
490 args.next();
491 let path = args.next().unwrap();
492 let trusted_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
493
494 let tor_socks5_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
495 unsafe { TOR_PROXY = Some(tor_socks5_sockaddr); }
496
497 let bgp_sockaddr: SocketAddr = args.next().unwrap().parse().unwrap();
498 let bgp_peerasn: u32 = args.next().unwrap().parse().unwrap();
499
500 Store::new(path).and_then(move |store| {
501 unsafe { DATA_STORE = Some(Box::new(store)) };
502 let store = unsafe { DATA_STORE.as_ref().unwrap() };
503 unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
504
505 let bgp_client = BGPClient::new(bgp_peerasn, bgp_sockaddr, Duration::from_secs(60), unsafe { PRINTER.as_ref().unwrap() });
506 make_trusted_conn(trusted_sockaddr, Arc::clone(&bgp_client));
507
508 reader::read(store, unsafe { PRINTER.as_ref().unwrap() }, bgp_client);
509
510 future::ok(())
511 }).or_else(|| {
512 future::err(())
513 })
514 }));
515
516 tokio::run(future::lazy(|| {
517 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()
518 }));
519 }

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