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Merge pull request #2863 from lbryio/async_headers

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fetch headers on demand
This commit is contained in:
Lex Berezhny 2020-03-23 10:41:31 -04:00 • committed by GitHub
commit 1f9fbe34e4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
19 changed files with 944 additions and 128 deletions
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2
lbry/extras/daemon/components.py
View file

@ -143,7 +143,7 @@ class WalletComponent(Component):
progress = min(max(math.ceil(float(download_height) / float(target_height) * 100), 0), 100) progress = min(max(math.ceil(float(download_height) / float(target_height) * 100), 0), 100)
else: else:
progress = 100 progress = 100
best_hash = self.wallet_manager.get_best_blockhash() best_hash = await self.wallet_manager.get_best_blockhash()
result.update({ result.update({
'headers_synchronization_progress': progress, 'headers_synchronization_progress': progress,
'blocks': max(local_height, 0), 'blocks': max(local_height, 0),

6
lbry/extras/daemon/json_response_encoder.py
View file

@ -166,7 +166,7 @@ class JSONResponseEncoder(JSONEncoder):
'amount': dewies_to_lbc(txo.amount), 'amount': dewies_to_lbc(txo.amount),
'address': txo.get_address(self.ledger) if txo.has_address else None, 'address': txo.get_address(self.ledger) if txo.has_address else None,
'confirmations': (best_height+1) - tx_height if tx_height > 0 else tx_height, 'confirmations': (best_height+1) - tx_height if tx_height > 0 else tx_height,
'timestamp': self.ledger.headers[tx_height]['timestamp'] if 0 < tx_height <= best_height else None 'timestamp': self.ledger.headers.estimated_timestamp(tx_height)
} }
if txo.is_spent is not None: if txo.is_spent is not None:
output['is_spent'] = txo.is_spent output['is_spent'] = txo.is_spent
@ -244,7 +244,7 @@ class JSONResponseEncoder(JSONEncoder):
if isinstance(value, int): if isinstance(value, int):
meta[key] = dewies_to_lbc(value) meta[key] = dewies_to_lbc(value)
if 0 < meta.get('creation_height', 0) <= self.ledger.headers.height: if 0 < meta.get('creation_height', 0) <= self.ledger.headers.height:
meta['creation_timestamp'] = self.ledger.headers[meta['creation_height']]['timestamp'] meta['creation_timestamp'] = self.ledger.headers.estimated_timestamp(meta['creation_height'])
return meta return meta
def encode_input(self, txi): def encode_input(self, txi):
@ -306,7 +306,7 @@ class JSONResponseEncoder(JSONEncoder):
'added_on': managed_stream.added_on, 'added_on': managed_stream.added_on,
'height': tx_height, 'height': tx_height,
'confirmations': (best_height + 1) - tx_height if tx_height > 0 else tx_height, 'confirmations': (best_height + 1) - tx_height if tx_height > 0 else tx_height,
'timestamp': self.ledger.headers[tx_height]['timestamp'] if 0 < tx_height <= best_height else None, 'timestamp': self.ledger.headers.estimated_timestamp(tx_height),
'is_fully_reflected': managed_stream.is_fully_reflected 'is_fully_reflected': managed_stream.is_fully_reflected
} }

2
lbry/stream/stream_manager.py
View file

@ -338,7 +338,7 @@ class StreamManager:
'claim_sequence': -1, 'claim_sequence': -1,
'address': txo.get_address(wallet_manager.ledger), 'address': txo.get_address(wallet_manager.ledger),
'valid_at_height': txo.meta.get('activation_height', None), 'valid_at_height': txo.meta.get('activation_height', None),
'timestamp': wallet_manager.ledger.headers[tx_height]['timestamp'], 'timestamp': wallet_manager.ledger.headers.estimated_timestamp(tx_height),
'supports': [] 'supports': []
} }
else: else:

1
lbry/testcase.py
View file

@ -370,6 +370,7 @@ class CommandTestCase(IntegrationTestCase):
) )
self.extra_wallet_node_port += 1 self.extra_wallet_node_port += 1
await wallet_node.start(self.conductor.spv_node, seed=seed) await wallet_node.start(self.conductor.spv_node, seed=seed)
await wallet_node.ledger.on_ready.first
self.extra_wallet_nodes.append(wallet_node) self.extra_wallet_nodes.append(wallet_node)
upload_dir = os.path.join(wallet_node.data_path, 'uploads') upload_dir = os.path.join(wallet_node.data_path, 'uploads')

737
lbry/wallet/checkpoints.py Normal file
View file

@ -0,0 +1,737 @@
HASHES = {
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682000: '0e793523ba0a679dce1e9cf1d1189c5311e27ae8d88c35bce36ddb3c16dc34c4',
683000: '08e07172a6b6c3d70c4379b206ed796ea8d916d314d0b6f02539becbb90077d5',
684000: '0b67663fc37940b4d40ba88b8b7610776e35f070e4995c5ab09ccd4b86dc1143',
685000: '8ae92af68bcc012326889b5ef89b899aa38f65dfd3d9f7dd5b29dba0c5fbebbd',
686000: '5223ea0cffd3c59fa6597208425ab55b3a76366fbd27d22508cd208ebf2a2eec',
687000: 'e160e55af7fd110905364f980543fca62a123c84c81e9fd38a0aeeebc30a501a',
688000: 'fcf3b5e0afae8d665cd6f63dacd2a861aecac20f8b73a682f79cad9523c5c4f3',
689000: '772ffab484f07ad91ed45cf6f569eff7440f4243e16e07698e4b7bd4a109e6e3',
690000: '5b2a4fc69617ccf1787ee40a0f6d7e0af783bcd856c2c8e0ab747a91a7c68d19',
691000: 'e4ba352a759e2425d508a4d5b58595e6ff5eb912d8bfece5a0bc646f61e77084',
692000: 'fca2c5b6a721db85278ab55b5e2e39a445e5b1ee5ba69a17044623a6b945d0b2',
693000: '99f4365eee70f86499ec26c373922d389cbc5e2a198e96af5d5823ad241748a1',
694000: '0e19e76398e65cb01517dcd4ee702c9c04c0fd53cf9468ee539094aa6248e1c8',
695000: '5addd92022007d81ced43595458e2eee2903227063af8e9edd75cccbe559930d',
696000: 'ba25dfe3467cc9999eb8593d955032475b777cefc8006851f692266ebb83d140',
697000: 'e10c1c734038198a99bf970ae89e3a56b2058612e35eac8141d48e147d2d47e0',
698000: '472c4de8e57737ca48c3bdbf3c35c37f24a179f5dfa48af89efda3c3d33c131f',
699000: 'b359f2e61a3ca3cf8b613045617e38b06767ccff72129f13971faf26a4d08234',
700000: 'd0555d53358978ae0abcb09f911c1b3e7b5a282b4ff6d455ca9ad04299666dc5',
701000: '5c763b8b4329809553fb58ab279ebbc6639695c45760f0c181168d41da95e6d7',
702000: '8a6abdca484fbdac5fd6fb279a435377d964d43b62393b0d5b0cd3baaab1d2c3',
703000: '50cf159af75b28c7a95ca990e480ebcd534c4601b03d7c0a979f26f4e33cecd7',
704000: '0daf7f9c7eca5c6d91de9ebadb3ef1287c290700bab0aa9f6a2ac4bf42a8a98c',
705000: 'a359e7584112eadd7fad5d961f1dee180481852d7706701c2211a98a009c128d',
706000: '139ab9432b0c7f62739f818b114d57a59cbf20584230f1198c35f1da62c2ed62',
707000: '43e1f4c83d26d419a35adc4dc5bd85c6253ec0faf7e70196bc5d5fac18c51746',
708000: '1a05dba8d5d2ef4984c79cc939148ad71535043640fd5644141cdbc512623514',
709000: 'fe7a8bd03f742de5227e5d0c8dcfd0b5cc13582703b74b1898c506fc6ffdab04',
710000: '26217b4ecadd39e9a14ffb6cbcaab6ee7bf0954efcbbbec4de9bddb461819084',
711000: '94aee5cc00e862e4952e573908449f4a48b630285f2f2fb20765d01dfcb68ac6',
712000: '21fb256c0f5133634b94f6522cb8d2b0a9b982f1672ba561033be689410e7860',
713000: '8d7d7ee4cb0598fecd85c8004b59074bedc3219f2376966e01a7faa92377cdcf',
714000: '56a033531fc8dbb7ffe07d7365cce20281e522c3ff9fe7a19d0188af351a5799',
715000: '4a6671846cccdc26d6fd1d77db50772315f932c24dc706004e11de68ad1ac387',
716000: '4222447b25305bc063b668c0e010b16f9c0802fff9371e9d096ba2174926f073',
717000: 'c231fcf5238a34cd15ac735d27b3dd0ee025714e48c408a798f0ba74be0aef77',
718000: '0f96aaa30d20fc572d9db26871143a657b706c35a9668d31e3b64280a049787a',
719000: '8557c088c4fc4745674c795d4a58aeb3df0dc91bb5ff93cc6268c4a88c64db5a',
720000: 'd699e06ee7835c9d687853187125f27145ec91daf394fdee37218b8c34fee9f4',
721000: 'c675e891a36425627e20de36f1fbdd5baba7114661f1c45f81f66a3fc55da902',
722000: '0c6fedfb6d6c1a77254904fdd2400dedce7d45bdc2271beb77e2087a0ba30d1a',
723000: 'a442c320886beccb3d7ea13276dbef8e98e1a47686cba2cdbeb6a2d2883af928',
724000: '1592e2d6ac3be7535b44db6cc99080d00b19c6663f52eef3c28eae3dac27ba49',
725000: '45b2a800f17b8571172a2658577dbe95b91ae88e611a91ac0c92609b3600f693',
726000: 'ed6257a6567665747aa354e93ab7d3e6539d6dd41fced8a2f62cf848e2b30ce0',
727000: '4b1a577c6c2358b0344bb1befd9b8e5572b787ec2bdc0bdcd4a150f26b2e2ab7',
728000: '448765fbdf6261c376120ff9401db8a8841fcbed466365f982d3bc53775b93ca',
729000: '99c2acea0af193d2e10498acd1c6d162d2a804a69157af46817b5ece5ea86491',
730000: '94cec967e44f850f512d4240cb8a52ffaf953d0364b0a1dd7604b4a01406e669',
731000: '6e63f5019439bc7e27a17a189baad0da8f5724883af3ca35efa0d4e5aaa75b97',
732000: '53e1b373805f3236c7725415e872d5635b8679894c4fb630c62b6b75b4ec9d9c',
733000: '43e9ab6cf54fde5dcdc4c473af26b256435f4af4254d96fa728f2af9b078d630',
734000: 'a3ef7f9257d591c7dcc0f82346cb162a768ee5fe1228353ec485e69be1bf585f',
}

172
lbry/wallet/header.py
View file

@ -1,16 +1,18 @@
import base64
import os import os
import struct import struct
import asyncio import asyncio
import hashlib
import logging import logging
import zlib
from concurrent.futures.thread import ThreadPoolExecutor
from io import BytesIO from io import BytesIO
from contextlib import asynccontextmanager from typing import Optional, Iterator, Tuple, Callable
from typing import Optional, Iterator, Tuple
from binascii import hexlify, unhexlify from binascii import hexlify, unhexlify
from lbry.crypto.hash import sha512, double_sha256, ripemd160 from lbry.crypto.hash import sha512, double_sha256, ripemd160
from lbry.wallet.util import ArithUint256 from lbry.wallet.util import ArithUint256
from .checkpoints import HASHES
log = logging.getLogger(__name__) log = logging.getLogger(__name__)
@ -32,7 +34,9 @@ class Headers:
max_target = 0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff max_target = 0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
genesis_hash = b'9c89283ba0f3227f6c03b70216b9f665f0118d5e0fa729cedf4fb34d6a34f463' genesis_hash = b'9c89283ba0f3227f6c03b70216b9f665f0118d5e0fa729cedf4fb34d6a34f463'
target_timespan = 150 target_timespan = 150
checkpoint = (600_000, b'100b33ca3d0b86a48f0d6d6f30458a130ecb89d5affefe4afccb134d5a40f4c2') checkpoints = HASHES
first_block_timestamp = 1466646588 # block 1, as 0 is off by a lot
timestamp_average_offset = 160.6855883050695 # calculated at 733447
validate_difficulty: bool = True validate_difficulty: bool = True
@ -41,15 +45,27 @@ class Headers:
self.io = BytesIO() self.io = BytesIO()
self.path = path self.path = path
self._size: Optional[int] = None self._size: Optional[int] = None
self.chunk_getter: Optional[Callable] = None
self.executor = ThreadPoolExecutor(1)
self.known_missing_checkpointed_chunks = set()
self.check_chunk_lock = asyncio.Lock()
async def open(self): async def open(self):
if not self.executor:
self.executor = ThreadPoolExecutor(1)
if self.path != ':memory:': if self.path != ':memory:':
if not os.path.exists(self.path): if not os.path.exists(self.path):
self.io = open(self.path, 'w+b') self.io = open(self.path, 'w+b')
else: else:
self.io = open(self.path, 'r+b') self.io = open(self.path, 'r+b')
self._size = self.io.seek(0, os.SEEK_END) // self.header_size
await self.ensure_checkpointed_size()
await self.get_all_missing_headers()
async def close(self): async def close(self):
if self.executor:
self.executor.shutdown()
self.executor = None
self.io.close() self.io.close()
@staticmethod @staticmethod
@ -97,23 +113,89 @@ class Headers:
return new_target return new_target
def __len__(self) -> int: def __len__(self) -> int:
if self._size is None:
self._size = self.io.seek(0, os.SEEK_END) // self.header_size
return self._size return self._size
def __bool__(self): def __bool__(self):
return True return True
def __getitem__(self, height) -> dict: async def get(self, height) -> dict:
if isinstance(height, slice): if isinstance(height, slice):
raise NotImplementedError("Slicing of header chain has not been implemented yet.") raise NotImplementedError("Slicing of header chain has not been implemented yet.")
try:
return self.deserialize(height, await self.get_raw_header(height))
except struct.error:
raise IndexError(f"failed to get {height}, at {len(self)}")
def estimated_timestamp(self, height):
return self.first_block_timestamp + (height * self.timestamp_average_offset)
async def get_raw_header(self, height) -> bytes:
if self.chunk_getter:
await self.ensure_chunk_at(height)
if not 0 <= height <= self.height: if not 0 <= height <= self.height:
raise IndexError(f"{height} is out of bounds, current height: {self.height}") raise IndexError(f"{height} is out of bounds, current height: {self.height}")
return self.deserialize(height, self.get_raw_header(height)) return await asyncio.get_running_loop().run_in_executor(self.executor, self._read, height)
def get_raw_header(self, height) -> bytes: def _read(self, height, count=1):
self.io.seek(height * self.header_size, os.SEEK_SET) self.io.seek(height * self.header_size, os.SEEK_SET)
return self.io.read(self.header_size) return self.io.read(self.header_size * count)
def chunk_hash(self, start, count):
self.io.seek(start * self.header_size, os.SEEK_SET)
return self.hash_header(self.io.read(count * self.header_size)).decode()
async def ensure_checkpointed_size(self):
max_checkpointed_height = max(self.checkpoints.keys() or [-1])
if self.height < max_checkpointed_height:
self._write(max_checkpointed_height, bytes([0] * self.header_size * 1000))
async def ensure_chunk_at(self, height):
async with self.check_chunk_lock:
if await self.has_header(height):
log.debug("has header %s", height)
return
return await self.fetch_chunk(height)
async def fetch_chunk(self, height):
log.info("on-demand fetching height %s", height)
start = (height // 1000) * 1000
headers = await self.chunk_getter(start) # pylint: disable=not-callable
chunk = (
zlib.decompress(base64.b64decode(headers['base64']), wbits=-15, bufsize=600_000)
)
chunk_hash = self.hash_header(chunk).decode()
if self.checkpoints.get(start) == chunk_hash:
await asyncio.get_running_loop().run_in_executor(self.executor, self._write, start, chunk)
if start in self.known_missing_checkpointed_chunks:
self.known_missing_checkpointed_chunks.remove(start)
return
elif start not in self.checkpoints:
return # todo: fixme
raise Exception(
f"Checkpoint mismatch at height {start}. Expected {self.checkpoints[start]}, but got {chunk_hash} instead."
)
async def has_header(self, height):
normalized_height = (height // 1000) * 1000
if normalized_height in self.checkpoints:
return normalized_height not in self.known_missing_checkpointed_chunks
def _has_header(height):
empty = '56944c5d3f98413ef45cf54545538103cc9f298e0575820ad3591376e2e0f65d'
all_zeroes = '789d737d4f448e554b318c94063bbfa63e9ccda6e208f5648ca76ee68896557b'
return self.chunk_hash(height, 1) not in (empty, all_zeroes)
return await asyncio.get_running_loop().run_in_executor(self.executor, _has_header, height)
async def get_all_missing_headers(self):
# Heavy operation done in one optimized shot
def _io_checkall():
for chunk_height, expected_hash in reversed(list(self.checkpoints.items())):
if chunk_height in self.known_missing_checkpointed_chunks:
continue
if self.chunk_hash(chunk_height, 1000) != expected_hash:
self.known_missing_checkpointed_chunks.add(chunk_height)
return self.known_missing_checkpointed_chunks
return await asyncio.get_running_loop().run_in_executor(self.executor, _io_checkall)
@property @property
def height(self) -> int: def height(self) -> int:
@ -123,9 +205,9 @@ class Headers:
def bytes_size(self): def bytes_size(self):
return len(self) * self.header_size return len(self) * self.header_size
def hash(self, height=None) -> bytes: async def hash(self, height=None) -> bytes:
return self.hash_header( return self.hash_header(
self.get_raw_header(height if height is not None else self.height) await self.get_raw_header(height if height is not None else self.height)
) )
@staticmethod @staticmethod
@ -134,44 +216,18 @@ class Headers:
return b'0' * 64 return b'0' * 64
return hexlify(double_sha256(header)[::-1]) return hexlify(double_sha256(header)[::-1])
@asynccontextmanager
async def checkpointed_connector(self):
buf = BytesIO()
try:
yield buf
finally:
await asyncio.sleep(0)
final_height = len(self) + buf.tell() // self.header_size
verifiable_bytes = (self.checkpoint[0] - len(self)) * self.header_size if self.checkpoint else 0
if verifiable_bytes > 0 and final_height >= self.checkpoint[0]:
buf.seek(0)
self.io.seek(0)
h = hashlib.sha256()
h.update(self.io.read())
h.update(buf.read(verifiable_bytes))
if h.hexdigest().encode() == self.checkpoint[1]:
buf.seek(0)
self._write(len(self), buf.read(verifiable_bytes))
remaining = buf.read()
buf.seek(0)
buf.write(remaining)
buf.truncate()
else:
log.warning("Checkpoint mismatch, connecting headers through slow method.")
if buf.tell() > 0:
await self.connect(len(self), buf.getvalue())
async def connect(self, start: int, headers: bytes) -> int: async def connect(self, start: int, headers: bytes) -> int:
added = 0 added = 0
bail = False bail = False
for height, chunk in self._iterate_chunks(start, headers): for height, chunk in self._iterate_chunks(start, headers):
try: try:
# validate_chunk() is CPU bound and reads previous chunks from file system # validate_chunk() is CPU bound and reads previous chunks from file system
self.validate_chunk(height, chunk) await self.validate_chunk(height, chunk)
except InvalidHeader as e: except InvalidHeader as e:
bail = True bail = True
chunk = chunk[:(height-e.height)*self.header_size] chunk = chunk[:(height-e.height)*self.header_size]
added += self._write(height, chunk) if chunk else 0 if chunk:
added += await asyncio.get_running_loop().run_in_executor(self.executor, self._write, height, chunk)
if bail: if bail:
break break
return added return added
@ -179,20 +235,21 @@ class Headers:
def _write(self, height, verified_chunk): def _write(self, height, verified_chunk):
self.io.seek(height * self.header_size, os.SEEK_SET) self.io.seek(height * self.header_size, os.SEEK_SET)
written = self.io.write(verified_chunk) // self.header_size written = self.io.write(verified_chunk) // self.header_size
self.io.truncate() # self.io.truncate()
# .seek()/.write()/.truncate() might also .flush() when needed # .seek()/.write()/.truncate() might also .flush() when needed
# the goal here is mainly to ensure we're definitely flush()'ing # the goal here is mainly to ensure we're definitely flush()'ing
self.io.flush() self.io.flush()
self._size = self.io.tell() // self.header_size self._size = max(self._size or 0, self.io.tell() // self.header_size)
return written return written
def validate_chunk(self, height, chunk): async def validate_chunk(self, height, chunk):
previous_hash, previous_header, previous_previous_header = None, None, None previous_hash, previous_header, previous_previous_header = None, None, None
if height > 0: if height > 0:
previous_header = self[height-1] raw = await self.get_raw_header(height-1)
previous_hash = self.hash(height-1) previous_header = self.deserialize(height-1, raw)
previous_hash = self.hash_header(raw)
if height > 1: if height > 1:
previous_previous_header = self[height-2] previous_previous_header = await self.get(height-2)
chunk_target = self.get_next_chunk_target(height // 2016 - 1) chunk_target = self.get_next_chunk_target(height // 2016 - 1)
for current_hash, current_header in self._iterate_headers(height, chunk): for current_hash, current_header in self._iterate_headers(height, chunk):
block_target = self.get_next_block_target(chunk_target, previous_previous_header, previous_header) block_target = self.get_next_block_target(chunk_target, previous_previous_header, previous_header)
@ -235,8 +292,9 @@ class Headers:
previous_header_hash = fail = None previous_header_hash = fail = None
batch_size = 36 batch_size = 36
for start_height in range(0, self.height, batch_size): for start_height in range(0, self.height, batch_size):
self.io.seek(self.header_size * start_height) headers = await asyncio.get_running_loop().run_in_executor(
headers = self.io.read(self.header_size*batch_size) self.executor, self._read, start_height, batch_size
)
if len(headers) % self.header_size != 0: if len(headers) % self.header_size != 0:
headers = headers[:(len(headers) // self.header_size) * self.header_size] headers = headers[:(len(headers) // self.header_size) * self.header_size]
for header_hash, header in self._iterate_headers(start_height, headers): for header_hash, header in self._iterate_headers(start_height, headers):
@ -249,11 +307,12 @@ class Headers:
fail = True fail = True
if fail: if fail:
log.warning("Header file corrupted at height %s, truncating it.", height - 1) log.warning("Header file corrupted at height %s, truncating it.", height - 1)
self.io.seek(max(0, (height - 1)) * self.header_size, os.SEEK_SET) def __truncate(at_height):
self.io.truncate() self.io.seek(max(0, (at_height - 1)) * self.header_size, os.SEEK_SET)
self.io.flush() self.io.truncate()
self._size = None self.io.flush()
return self._size = self.io.seek(0, os.SEEK_END) // self.header_size
return await asyncio.get_running_loop().run_in_executor(self.executor, __truncate, height)
previous_header_hash = header_hash previous_header_hash = header_hash
@classmethod @classmethod
@ -276,10 +335,6 @@ class Headers:
header = headers[start:end] header = headers[start:end]
yield self.hash_header(header), self.deserialize(height+idx, header) yield self.hash_header(header), self.deserialize(height+idx, header)
@property
def claim_trie_root(self):
return self[self.height]['claim_trie_root']
@staticmethod @staticmethod
def header_hash_to_pow_hash(header_hash: bytes): def header_hash_to_pow_hash(header_hash: bytes):
header_hash_bytes = unhexlify(header_hash)[::-1] header_hash_bytes = unhexlify(header_hash)[::-1]
@ -295,3 +350,4 @@ class UnvalidatedHeaders(Headers):
validate_difficulty = False validate_difficulty = False
max_target = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff max_target = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
genesis_hash = b'6e3fcf1299d4ec5d79c3a4c91d624a4acf9e2e173d95a1a0504f677669687556' genesis_hash = b'6e3fcf1299d4ec5d79c3a4c91d624a4acf9e2e173d95a1a0504f677669687556'
checkpoints = {}

31
lbry/wallet/ledger.py
View file

@ -1,7 +1,5 @@
import os import os
import zlib
import copy import copy
import base64
import asyncio import asyncio
import logging import logging
from io import StringIO from io import StringIO
@ -318,7 +316,6 @@ class Ledger(metaclass=LedgerRegistry):
await first_connection await first_connection
async with self._header_processing_lock: async with self._header_processing_lock:
await self._update_tasks.add(self.initial_headers_sync()) await self._update_tasks.add(self.initial_headers_sync())
await self._on_ready_controller.stream.first
await asyncio.gather(*(a.maybe_migrate_certificates() for a in self.accounts)) await asyncio.gather(*(a.maybe_migrate_certificates() for a in self.accounts))
await asyncio.gather(*(a.save_max_gap() for a in self.accounts)) await asyncio.gather(*(a.save_max_gap() for a in self.accounts))
if len(self.accounts) > 10: if len(self.accounts) > 10:
@ -330,7 +327,7 @@ class Ledger(metaclass=LedgerRegistry):
async def join_network(self, *_): async def join_network(self, *_):
log.info("Subscribing and updating accounts.") log.info("Subscribing and updating accounts.")
async with self._header_processing_lock: async with self._header_processing_lock:
await self.update_headers() await self._update_tasks.add(self.initial_headers_sync())
await self.subscribe_accounts() await self.subscribe_accounts()
await self._update_tasks.done.wait() await self._update_tasks.done.wait()
self._on_ready_controller.add(True) self._on_ready_controller.add(True)
@ -347,19 +344,15 @@ class Ledger(metaclass=LedgerRegistry):
return max(self.headers.height, self._download_height) return max(self.headers.height, self._download_height)
async def initial_headers_sync(self): async def initial_headers_sync(self):
target = self.network.remote_height + 1 get_chunk = partial(self.network.retriable_call, self.network.get_headers, count=1000, b64=True)
current = len(self.headers) self.headers.chunk_getter = get_chunk
get_chunk = partial(self.network.retriable_call, self.network.get_headers, count=4096, b64=True)
chunks = [asyncio.create_task(get_chunk(height)) for height in range(current, target, 4096)] async def doit():
total = 0 async with self._header_processing_lock:
async with self.headers.checkpointed_connector() as buffer: for height in reversed(sorted(self.headers.known_missing_checkpointed_chunks)):
for chunk in chunks: await self.headers.ensure_chunk_at(height)
headers = await chunk self._update_tasks.add(doit())
total += buffer.write( await self.update_headers()
zlib.decompress(base64.b64decode(headers['base64']), wbits=-15, bufsize=600_000)
)
self._download_height = current + total // self.headers.header_size
log.info("Headers sync: %s / %s", self._download_height, target)
async def update_headers(self, height=None, headers=None, subscription_update=False): async def update_headers(self, height=None, headers=None, subscription_update=False):
rewound = 0 rewound = 0
@ -601,7 +594,7 @@ class Ledger(metaclass=LedgerRegistry):
if 0 < remote_height < len(self.headers): if 0 < remote_height < len(self.headers):
merkle = await self.network.retriable_call(self.network.get_merkle, tx.id, remote_height) merkle = await self.network.retriable_call(self.network.get_merkle, tx.id, remote_height)
merkle_root = self.get_root_of_merkle_tree(merkle['merkle'], merkle['pos'], tx.hash) merkle_root = self.get_root_of_merkle_tree(merkle['merkle'], merkle['pos'], tx.hash)
header = self.headers[remote_height] header = await self.headers.get(remote_height)
tx.position = merkle['pos'] tx.position = merkle['pos']
tx.is_verified = merkle_root == header['merkle_root'] tx.is_verified = merkle_root == header['merkle_root']
@ -899,7 +892,7 @@ class Ledger(metaclass=LedgerRegistry):
headers = self.headers headers = self.headers
history = [] history = []
for tx in txs: # pylint: disable=too-many-nested-blocks for tx in txs: # pylint: disable=too-many-nested-blocks
ts = headers[tx.height]['timestamp'] if tx.height > 0 else None ts = headers.estimated_timestamp(tx.height)
item = { item = {
'txid': tx.id, 'txid': tx.id,
'timestamp': ts, 'timestamp': ts,

4
lbry/wallet/manager.py
View file

@ -248,10 +248,10 @@ class WalletManager:
log.warning("Failed to migrate %s receiving addresses!", log.warning("Failed to migrate %s receiving addresses!",
len(set(receiving_addresses).difference(set(migrated_receiving)))) len(set(receiving_addresses).difference(set(migrated_receiving))))
def get_best_blockhash(self): async def get_best_blockhash(self):
if len(self.ledger.headers) <= 0: if len(self.ledger.headers) <= 0:
return self.ledger.genesis_hash return self.ledger.genesis_hash
return self.ledger.headers.hash(self.ledger.headers.height).decode() return (await self.ledger.headers.hash(self.ledger.headers.height)).decode()
def get_unused_address(self): def get_unused_address(self):
return self.default_account.receiving.get_or_create_usable_address() return self.default_account.receiving.get_or_create_usable_address()

1
lbry/wallet/orchstr8/node.py
View file

@ -77,6 +77,7 @@ class Conductor:
async def start_wallet(self): async def start_wallet(self):
if not self.wallet_started: if not self.wallet_started:
await self.wallet_node.start(self.spv_node) await self.wallet_node.start(self.spv_node)
await self.wallet_node.ledger.on_ready.first
self.wallet_started = True self.wallet_started = True
async def stop_wallet(self): async def stop_wallet(self):

35
scripts/checkpoints.py Normal file
View file

@ -0,0 +1,35 @@
import asyncio
import os
from lbry.extras.cli import ensure_directory_exists
from lbry.conf import Config
from lbry.wallet.header import Headers
import lbry.wallet.checkpoints
async def main():
outpath = lbry.wallet.checkpoints.__file__
ledger_path = os.path.join(Config().wallet_dir, 'lbc_mainnet')
ensure_directory_exists(ledger_path)
headers_path = os.path.join(ledger_path, 'headers')
headers = Headers(headers_path)
await headers.open()
print(f"Working on headers at {outpath}")
print("Verifying integrity, might take a while.")
await headers.repair()
target = ((headers.height - 100) // 1000) * 1000
current_checkpoint_tip = max(lbry.wallet.checkpoints.HASHES.keys())
if target <= current_checkpoint_tip:
print(f"We have nothing to add: Local: {target}, checkpoint: {current_checkpoint_tip}")
return
print(f"Headers file at {headers.height}, checkpointing up to {target}."
f"Current checkpoint at {current_checkpoint_tip}.")
with open(outpath, 'w') as outfile:
print('HASHES = {', file=outfile)
for height in range(0, target, 1000):
print(f" {height}: '{headers.chunk_hash(height, 1000)}',", file=outfile)
print('}', file=outfile)
if __name__ == "__main__":
asyncio.get_event_loop().run_until_complete(main())

6
tests/integration/blockchain/test_blockchain_reorganization.py
View file

@ -8,7 +8,7 @@ class BlockchainReorganizationTests(IntegrationTestCase):
async def assertBlockHash(self, height): async def assertBlockHash(self, height):
self.assertEqual( self.assertEqual(
self.ledger.headers.hash(height).decode(), (await self.ledger.headers.hash(height)).decode(),
await self.blockchain.get_block_hash(height) await self.blockchain.get_block_hash(height)
) )
@ -16,7 +16,7 @@ class BlockchainReorganizationTests(IntegrationTestCase):
# invalidate current block, move forward 2 # invalidate current block, move forward 2
self.assertEqual(self.ledger.headers.height, 200) self.assertEqual(self.ledger.headers.height, 200)
await self.assertBlockHash(200) await self.assertBlockHash(200)
await self.blockchain.invalidate_block(self.ledger.headers.hash(200).decode()) await self.blockchain.invalidate_block((await self.ledger.headers.hash(200)).decode())
await self.blockchain.generate(2) await self.blockchain.generate(2)
await self.ledger.on_header.where(lambda e: e.height == 201) await self.ledger.on_header.where(lambda e: e.height == 201)
self.assertEqual(self.ledger.headers.height, 201) self.assertEqual(self.ledger.headers.height, 201)
@ -24,7 +24,7 @@ class BlockchainReorganizationTests(IntegrationTestCase):
await self.assertBlockHash(201) await self.assertBlockHash(201)
# invalidate current block, move forward 3 # invalidate current block, move forward 3
await self.blockchain.invalidate_block(self.ledger.headers.hash(200).decode()) await self.blockchain.invalidate_block((await self.ledger.headers.hash(200)).decode())
await self.blockchain.generate(3) await self.blockchain.generate(3)
await self.ledger.on_header.where(lambda e: e.height == 202) await self.ledger.on_header.where(lambda e: e.height == 202)
self.assertEqual(self.ledger.headers.height, 202) self.assertEqual(self.ledger.headers.height, 202)

12
tests/integration/blockchain/test_network.py
View file

@ -90,13 +90,11 @@ class ReconnectTests(IntegrationTestCase):
while self.conductor.spv_node.server.session_mgr.notified_height < initial_height + 99: # off by 1 while self.conductor.spv_node.server.session_mgr.notified_height < initial_height + 99: # off by 1
await asyncio.sleep(0.1) await asyncio.sleep(0.1)
self.assertEqual(initial_height, self.ledger.local_height_including_downloaded_height) self.assertEqual(initial_height, self.ledger.local_height_including_downloaded_height)
# locks header processing so we make sure we are the only ones modifying it await self.ledger.headers.open()
async with self.ledger._header_processing_lock: await self.ledger.network.start()
await self.ledger.headers.open() await self.ledger.network.on_connected.first
await self.ledger.network.start() await self.ledger.initial_headers_sync()
await self.ledger.network.on_connected.first self.assertEqual(initial_height + 100, self.ledger.local_height_including_downloaded_height)
await self.ledger.initial_headers_sync()
self.assertEqual(initial_height + 100, self.ledger.local_height_including_downloaded_height)
async def test_connection_drop_still_receives_events_after_reconnected(self): async def test_connection_drop_still_receives_events_after_reconnected(self):
address1 = await self.account.receiving.get_or_create_usable_address() address1 = await self.account.receiving.get_or_create_usable_address()

6
tests/integration/blockchain/test_resolve_command.py
View file

@ -49,11 +49,11 @@ class ResolveCommand(BaseResolveTestCase):
self.assertTrue(claim['is_channel_signature_valid']) self.assertTrue(claim['is_channel_signature_valid'])
self.assertEqual( self.assertEqual(
claim['timestamp'], claim['timestamp'],
self.ledger.headers[claim['height']]['timestamp'] self.ledger.headers.estimated_timestamp(claim['height'])
) )
self.assertEqual( self.assertEqual(
claim['signing_channel']['timestamp'], claim['signing_channel']['timestamp'],
self.ledger.headers[claim['signing_channel']['height']]['timestamp'] self.ledger.headers.estimated_timestamp(claim['signing_channel']['height'])
) )
# resolving claim foo by itself # resolving claim foo by itself
@ -337,7 +337,7 @@ class ResolveAfterReorg(BaseResolveTestCase):
blocks = self.ledger.headers.height - start blocks = self.ledger.headers.height - start
self.blockchain.block_expected = start - 1 self.blockchain.block_expected = start - 1
# go back to start # go back to start
await self.blockchain.invalidate_block(self.ledger.headers.hash(start).decode()) await self.blockchain.invalidate_block((await self.ledger.headers.hash(start)).decode())
# go to previous + 1 # go to previous + 1
await self.generate(blocks + 2) await self.generate(blocks + 2)

1
tests/integration/blockchain/test_sync.py
View file

@ -27,6 +27,7 @@ class SyncTests(IntegrationTestCase):
wallet_node = WalletNode(WalletManager, RegTestLedger, port=self.api_port) wallet_node = WalletNode(WalletManager, RegTestLedger, port=self.api_port)
await wallet_node.start(self.conductor.spv_node, seed) await wallet_node.start(self.conductor.spv_node, seed)
self.started_nodes.append(wallet_node) self.started_nodes.append(wallet_node)
await wallet_node.ledger.on_ready.first
return wallet_node return wallet_node
async def test_nodes_with_same_account_stay_in_sync(self): async def test_nodes_with_same_account_stay_in_sync(self):

4
tests/integration/datanetwork/test_file_commands.py
View file

@ -125,14 +125,14 @@ class FileCommands(CommandTestCase):
file_list = await self.file_list() file_list = await self.file_list()
self.assertEqual( self.assertEqual(
file_list[0]['timestamp'], file_list[0]['timestamp'],
None self.ledger.headers.estimated_timestamp(file_list[0]['height'])
) )
self.assertEqual(file_list[0]['confirmations'], -1) self.assertEqual(file_list[0]['confirmations'], -1)
await self.daemon.jsonrpc_resolve('foo') await self.daemon.jsonrpc_resolve('foo')
file_list = await self.file_list() file_list = await self.file_list()
self.assertEqual( self.assertEqual(
file_list[0]['timestamp'], file_list[0]['timestamp'],
self.ledger.headers[file_list[0]['height']]['timestamp'] self.ledger.headers.estimated_timestamp(file_list[0]['height'])
) )
self.assertEqual(file_list[0]['confirmations'], 1) self.assertEqual(file_list[0]['confirmations'], 1)

2
tests/unit/lbrynet_daemon/test_Daemon.py
View file

@ -92,7 +92,7 @@ class TestCostEst(unittest.TestCase):
@unittest.SkipTest @unittest.SkipTest
class TestJsonRpc(unittest.TestCase): class TestJsonRpc(unittest.TestCase):
def setUp(self): def setUp(self):
def noop(): async def noop():
return None return None
test_utils.reset_time(self) test_utils.reset_time(self)

3
tests/unit/stream/test_stream_manager.py
View file

@ -84,6 +84,9 @@ async def get_mock_wallet(sd_hash, storage, balance=10.0, fee=None):
}) })
class FakeHeaders: class FakeHeaders:
def estimated_timestamp(self, height):
return 1984
def __init__(self, height): def __init__(self, height):
self.height = height self.height = height

45
tests/unit/wallet/test_headers.py
View file

@ -1,12 +1,15 @@
import os import os
import asyncio import asyncio
import tempfile import tempfile
from binascii import hexlify, unhexlify from binascii import unhexlify
from lbry.crypto.hash import sha256
from lbry.wallet.util import ArithUint256 from lbry.wallet.util import ArithUint256
from lbry.testcase import AsyncioTestCase from lbry.testcase import AsyncioTestCase
from lbry.wallet.ledger import Headers from lbry.wallet.ledger import Headers as _Headers
class Headers(_Headers):
checkpoints = {}
def block_bytes(blocks): def block_bytes(blocks):
@ -15,11 +18,12 @@ def block_bytes(blocks):
class TestHeaders(AsyncioTestCase): class TestHeaders(AsyncioTestCase):
def test_deserialize(self): async def test_deserialize(self):
self.maxDiff = None self.maxDiff = None
h = Headers(':memory:') h = Headers(':memory:')
h.io.write(HEADERS) h.io.write(HEADERS)
self.assertEqual(h[0], { await h.open()
self.assertEqual(await h.get(0), {
'bits': 520159231, 'bits': 520159231,
'block_height': 0, 'block_height': 0,
'claim_trie_root': b'0000000000000000000000000000000000000000000000000000000000000001', 'claim_trie_root': b'0000000000000000000000000000000000000000000000000000000000000001',
@ -29,7 +33,7 @@ class TestHeaders(AsyncioTestCase):
'timestamp': 1446058291, 'timestamp': 1446058291,
'version': 1 'version': 1
}) })
self.assertEqual(h[10], { self.assertEqual(await h.get(10), {
'bits': 509349720, 'bits': 509349720,
'block_height': 10, 'block_height': 10,
'merkle_root': b'f4d8fded6a181d4a8a2817a0eb423cc0f414af29490004a620e66c35c498a554', 'merkle_root': b'f4d8fded6a181d4a8a2817a0eb423cc0f414af29490004a620e66c35c498a554',
@ -42,6 +46,7 @@ class TestHeaders(AsyncioTestCase):
async def test_connect_from_genesis(self): async def test_connect_from_genesis(self):
headers = Headers(':memory:') headers = Headers(':memory:')
await headers.open()
self.assertEqual(headers.height, -1) self.assertEqual(headers.height, -1)
await headers.connect(0, HEADERS) await headers.connect(0, HEADERS)
self.assertEqual(headers.height, 19) self.assertEqual(headers.height, 19)
@ -49,6 +54,7 @@ class TestHeaders(AsyncioTestCase):
async def test_connect_from_middle(self): async def test_connect_from_middle(self):
h = Headers(':memory:') h = Headers(':memory:')
h.io.write(HEADERS[:block_bytes(10)]) h.io.write(HEADERS[:block_bytes(10)])
await h.open()
self.assertEqual(h.height, 9) self.assertEqual(h.height, 9)
await h.connect(len(h), HEADERS[block_bytes(10):block_bytes(20)]) await h.connect(len(h), HEADERS[block_bytes(10):block_bytes(20)])
self.assertEqual(h.height, 19) self.assertEqual(h.height, 19)
@ -112,11 +118,11 @@ class TestHeaders(AsyncioTestCase):
await headers.connect(0, HEADERS) await headers.connect(0, HEADERS)
self.assertEqual(19, headers.height) self.assertEqual(19, headers.height)
with self.assertRaises(IndexError): with self.assertRaises(IndexError):
_ = headers[3001] _ = await headers.get(3001)
with self.assertRaises(IndexError): with self.assertRaises(IndexError):
_ = headers[-1] _ = await headers.get(-1)
self.assertIsNotNone(headers[19]) self.assertIsNotNone(await headers.get(19))
self.assertIsNotNone(headers[0]) self.assertIsNotNone(await headers.get(0))
async def test_repair(self): async def test_repair(self):
headers = Headers(':memory:') headers = Headers(':memory:')
@ -138,21 +144,6 @@ class TestHeaders(AsyncioTestCase):
await headers.connect(len(headers), HEADERS[block_bytes(8):]) await headers.connect(len(headers), HEADERS[block_bytes(8):])
self.assertEqual(19, headers.height) self.assertEqual(19, headers.height)
async def test_checkpointed_writer(self):
headers = Headers(':memory:')
getblocks = lambda start, end: HEADERS[block_bytes(start):block_bytes(end)]
headers.checkpoint = 10, hexlify(sha256(getblocks(10, 11)))
async with headers.checkpointed_connector() as buff:
buff.write(getblocks(0, 10))
self.assertEqual(len(headers), 10)
async with headers.checkpointed_connector() as buff:
buff.write(getblocks(10, 19))
self.assertEqual(len(headers), 19)
headers = Headers(':memory:')
async with headers.checkpointed_connector() as buff:
buff.write(getblocks(0, 19))
self.assertEqual(len(headers), 19)
async def test_concurrency(self): async def test_concurrency(self):
BLOCKS = 19 BLOCKS = 19
headers_temporary_file = tempfile.mktemp() headers_temporary_file = tempfile.mktemp()
@ -164,9 +155,9 @@ class TestHeaders(AsyncioTestCase):
await headers.connect(block_index, HEADERS[block_bytes(block_index):block_bytes(block_index + 1)]) await headers.connect(block_index, HEADERS[block_bytes(block_index):block_bytes(block_index + 1)])
async def reader(): async def reader():
for block_index in range(BLOCKS): for block_index in range(BLOCKS):
while len(headers) < block_index: while len(headers) <= block_index:
await asyncio.sleep(0.000001) await asyncio.sleep(0.000001)
assert headers[block_index]['block_height'] == block_index assert (await headers.get(block_index))['block_height'] == block_index
reader_task = asyncio.create_task(reader()) reader_task = asyncio.create_task(reader())
await writer() await writer()
await reader_task await reader_task

2
tests/unit/wallet/test_ledger.py
View file

@ -67,7 +67,7 @@ class LedgerTestCase(AsyncioTestCase):
serialized = self.make_header(**kwargs) serialized = self.make_header(**kwargs)
self.ledger.headers.io.seek(0, os.SEEK_END) self.ledger.headers.io.seek(0, os.SEEK_END)
self.ledger.headers.io.write(serialized) self.ledger.headers.io.write(serialized)
self.ledger.headers._size = None self.ledger.headers._size = self.ledger.headers.io.seek(0, os.SEEK_END) // self.ledger.headers.header_size
class TestSynchronization(LedgerTestCase): class TestSynchronization(LedgerTestCase):