chaintool/chainsyncer
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Lash/add filter

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This commit is contained in:
Louis Holbrook 2021-04-04 13:03:58 +00:00
parent 82e2674555
commit 673d80774a
17 changed files with 641 additions and 130 deletions
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2
MANIFEST.in
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@ -1 +1 @@
include requirements.txt LICENSE.txt include requirements.txt LICENSE.txt sql/**/*

160
chainsyncer/backend.py
View File

@ -7,9 +7,10 @@ from chainlib.chain import ChainSpec
# local imports # local imports
from chainsyncer.db.models.sync import BlockchainSync from chainsyncer.db.models.sync import BlockchainSync
from chainsyncer.db.models.filter import BlockchainSyncFilter
from chainsyncer.db.models.base import SessionBase from chainsyncer.db.models.base import SessionBase
logg = logging.getLogger() logg = logging.getLogger(__name__)
class SyncerBackend: class SyncerBackend:
@ -23,6 +24,7 @@ class SyncerBackend:
def __init__(self, chain_spec, object_id): def __init__(self, chain_spec, object_id):
self.db_session = None self.db_session = None
self.db_object = None self.db_object = None
self.db_object_filter = None
self.chain_spec = chain_spec self.chain_spec = chain_spec
self.object_id = object_id self.object_id = object_id
self.connect() self.connect()
@ -34,16 +36,28 @@ class SyncerBackend:
""" """
if self.db_session == None: if self.db_session == None:
self.db_session = SessionBase.create_session() self.db_session = SessionBase.create_session()
q = self.db_session.query(BlockchainSync) q = self.db_session.query(BlockchainSync)
q = q.filter(BlockchainSync.id==self.object_id) q = q.filter(BlockchainSync.id==self.object_id)
self.db_object = q.first() self.db_object = q.first()
if self.db_object != None:
qtwo = self.db_session.query(BlockchainSyncFilter)
qtwo = qtwo.join(BlockchainSync)
qtwo = qtwo.filter(BlockchainSync.id==self.db_object.id)
self.db_object_filter = qtwo.first()
if self.db_object == None: if self.db_object == None:
raise ValueError('sync entry with id {} not found'.format(self.object_id)) raise ValueError('sync entry with id {} not found'.format(self.object_id))
return self.db_session
def disconnect(self): def disconnect(self):
"""Commits state of sync to backend. """Commits state of sync to backend.
""" """
if self.db_object_filter != None:
self.db_session.add(self.db_object_filter)
self.db_session.add(self.db_object) self.db_session.add(self.db_object)
self.db_session.commit() self.db_session.commit()
self.db_session.close() self.db_session.close()
@ -67,8 +81,9 @@ class SyncerBackend:
""" """
self.connect() self.connect()
pair = self.db_object.cursor() pair = self.db_object.cursor()
(filter_state, count, digest) = self.db_object_filter.cursor()
self.disconnect() self.disconnect()
return pair return (pair, filter_state,)
def set(self, block_height, tx_height): def set(self, block_height, tx_height):
@ -82,8 +97,10 @@ class SyncerBackend:
""" """
self.connect() self.connect()
pair = self.db_object.set(block_height, tx_height) pair = self.db_object.set(block_height, tx_height)
self.db_object_filter.clear()
(filter_state, count, digest)= self.db_object_filter.cursor()
self.disconnect() self.disconnect()
return pair return (pair, filter_state,)
def start(self): def start(self):
@ -94,8 +111,9 @@ class SyncerBackend:
""" """
self.connect() self.connect()
pair = self.db_object.start() pair = self.db_object.start()
(filter_state, count, digest) = self.db_object_filter.start()
self.disconnect() self.disconnect()
return pair return (pair, filter_state,)
def target(self): def target(self):
@ -106,12 +124,13 @@ class SyncerBackend:
""" """
self.connect() self.connect()
target = self.db_object.target() target = self.db_object.target()
(filter_target, count, digest) = self.db_object_filter.target()
self.disconnect() self.disconnect()
return target return (target, filter_target,)
@staticmethod @staticmethod
def first(chain): def first(chain_spec):
"""Returns the model object of the most recent syncer in backend. """Returns the model object of the most recent syncer in backend.
:param chain: Chain spec of chain that syncer is running for. :param chain: Chain spec of chain that syncer is running for.
@ -119,11 +138,16 @@ class SyncerBackend:
:returns: Last syncer object :returns: Last syncer object
:rtype: cic_eth.db.models.BlockchainSync :rtype: cic_eth.db.models.BlockchainSync
""" """
return BlockchainSync.first(chain) #return BlockchainSync.first(str(chain_spec))
object_id = BlockchainSync.first(str(chain_spec))
if object_id == None:
return None
return SyncerBackend(chain_spec, object_id)
@staticmethod @staticmethod
def initial(chain, block_height): def initial(chain_spec, target_block_height, start_block_height=0):
"""Creates a new syncer session and commit its initial state to backend. """Creates a new syncer session and commit its initial state to backend.
:param chain: Chain spec of chain that syncer is running for. :param chain: Chain spec of chain that syncer is running for.
@ -133,24 +157,31 @@ class SyncerBackend:
:returns: New syncer object :returns: New syncer object
:rtype: cic_eth.db.models.BlockchainSync :rtype: cic_eth.db.models.BlockchainSync
""" """
if start_block_height >= target_block_height:
raise ValueError('start block height must be lower than target block height')
object_id = None object_id = None
session = SessionBase.create_session() session = SessionBase.create_session()
o = BlockchainSync(chain, 0, 0, block_height) o = BlockchainSync(str(chain_spec), start_block_height, 0, target_block_height)
session.add(o) session.add(o)
session.commit() session.commit()
object_id = o.id object_id = o.id
of = BlockchainSyncFilter(o)
session.add(of)
session.commit()
session.close() session.close()
return SyncerBackend(chain, object_id) return SyncerBackend(chain_spec, object_id)
@staticmethod @staticmethod
def resume(chain, block_height): def resume(chain_spec, block_height):
"""Retrieves and returns all previously unfinished syncer sessions. """Retrieves and returns all previously unfinished syncer sessions.
:param chain: Chain spec of chain that syncer is running for. :param chain_spec: Chain spec of chain that syncer is running for.
:type chain: cic_registry.chain.ChainSpec :type chain_spec: cic_registry.chain.ChainSpec
:param block_height: Target block height :param block_height: Target block height
:type block_height: number :type block_height: number
:returns: Syncer objects of unfinished syncs :returns: Syncer objects of unfinished syncs
@ -162,18 +193,56 @@ class SyncerBackend:
object_id = None object_id = None
for object_id in BlockchainSync.get_unsynced(session=session): highest_unsynced_block = 0
logg.debug('block syncer resume added previously unsynced sync entry id {}'.format(object_id)) highest_unsynced_tx = 0
syncers.append(SyncerBackend(chain, object_id)) object_id = BlockchainSync.get_last(session=session, live=False)
if object_id != None:
q = session.query(BlockchainSync)
o = q.get(object_id)
(highest_unsynced_block, highest_unsynced_index) = o.cursor()
(block_resume, tx_resume) = BlockchainSync.get_last_live_height(block_height, session=session) object_ids = BlockchainSync.get_unsynced(session=session)
if block_height != block_resume: session.close()
o = BlockchainSync(chain, block_resume, tx_resume, block_height)
session.add(o) for object_id in object_ids:
session.commit() s = SyncerBackend(chain_spec, object_id)
object_id = o.id logg.debug('resume unfinished {}'.format(s))
syncers.append(SyncerBackend(chain, object_id)) syncers.append(s)
logg.debug('block syncer resume added new sync entry from previous run id {}, start{}:{} target {}'.format(object_id, block_resume, tx_resume, block_height))
session = SessionBase.create_session()
last_live_id = BlockchainSync.get_last(session=session)
if last_live_id != None:
q = session.query(BlockchainSync)
o = q.get(last_live_id)
(block_resume, tx_resume) = o.cursor()
session.flush()
#if block_height != block_resume:
if highest_unsynced_block < block_resume:
q = session.query(BlockchainSyncFilter)
q = q.filter(BlockchainSyncFilter.chain_sync_id==last_live_id)
of = q.first()
(flags, count, digest) = of.cursor()
session.flush()
o = BlockchainSync(str(chain_spec), block_resume, tx_resume, block_height)
session.add(o)
session.flush()
object_id = o.id
of = BlockchainSyncFilter(o, count, flags, digest)
session.add(of)
session.commit()
backend = SyncerBackend(chain_spec, object_id)
syncers.append(backend)
logg.debug('last live session resume {}'.format(backend))
session.close() session.close()
@ -193,15 +262,40 @@ class SyncerBackend:
""" """
object_id = None object_id = None
session = SessionBase.create_session() session = SessionBase.create_session()
o = BlockchainSync(str(chain_spec), block_height, 0, None) o = BlockchainSync(str(chain_spec), block_height, 0, None)
session.add(o) session.add(o)
session.commit() session.flush()
object_id = o.id object_id = o.id
of = BlockchainSyncFilter(o)
session.add(of)
session.commit()
session.close() session.close()
return SyncerBackend(chain_spec, object_id) return SyncerBackend(chain_spec, object_id)
def register_filter(self, name):
self.connect()
if self.db_object_filter == None:
self.db_object_filter = BlockchainSyncFilter(self.db_object)
self.db_object_filter.add(name)
self.db_session.add(self.db_object_filter)
self.disconnect()
def complete_filter(self, n):
self.db_object_filter.set(n)
def __str__(self):
return "syncerbackend chain {} start {} target {}".format(self.chain(), self.start(), self.target())
class MemBackend: class MemBackend:
def __init__(self, chain_spec, object_id): def __init__(self, chain_spec, object_id):
@ -209,6 +303,7 @@ class MemBackend:
self.chain_spec = chain_spec self.chain_spec = chain_spec
self.block_height = 0 self.block_height = 0
self.tx_height = 0 self.tx_height = 0
self.flags = 0
self.db_session = None self.db_session = None
@ -227,4 +322,17 @@ class MemBackend:
def get(self): def get(self):
return (self.block_height, self.tx_height) return ((self.block_height, self.tx_height), self.flags)
def register_filter(self, name):
pass
def complete_filter(self, n):
pass
def __str__(self):
return "syncer membackend chain {} cursor".format(self.get())

36
chainsyncer/db/migrations/sqlalchemy.py Normal file
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@ -0,0 +1,36 @@
from alembic import op
import sqlalchemy as sa
def chainsyncer_upgrade(major, minor, patch):
r0_0_1_u()
def chainsyncer_downgrade(major, minor, patch):
r0_0_1_d()
def r0_0_1_u():
op.create_table(
'chain_sync',
sa.Column('id', sa.Integer, primary_key=True),
sa.Column('blockchain', sa.String, nullable=False),
sa.Column('block_start', sa.Integer, nullable=False, default=0),
sa.Column('tx_start', sa.Integer, nullable=False, default=0),
sa.Column('block_cursor', sa.Integer, nullable=False, default=0),
sa.Column('tx_cursor', sa.Integer, nullable=False, default=0),
sa.Column('block_target', sa.Integer, nullable=True),
sa.Column('date_created', sa.DateTime, nullable=False),
sa.Column('date_updated', sa.DateTime),
)
op.create_table(
'chain_sync_filter',
sa.Column('id', sa.Integer, primary_key=True),
sa.Column('chain_sync_id', sa.Integer, sa.ForeignKey('chain_sync.id'), nullable=True),
sa.Column('flags', sa.LargeBinary, nullable=True),
sa.Column('flags_start', sa.LargeBinary, nullable=True),
sa.Column('count', sa.Integer, nullable=False, default=0),
sa.Column('digest', sa.String(64), nullable=False),
)
def r0_0_1_d():
op.drop_table('chain_sync_filter')
op.drop_table('chain_sync')

69
chainsyncer/db/models/base.py
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@ -1,8 +1,18 @@
# stanard imports
import logging
# third-party imports # third-party imports
from sqlalchemy import Column, Integer from sqlalchemy import Column, Integer
from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import create_engine from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import (
StaticPool,
QueuePool,
AssertionPool,
)
logg = logging.getLogger()
Model = declarative_base(name='Model') Model = declarative_base(name='Model')
@ -21,7 +31,11 @@ class SessionBase(Model):
transactional = True transactional = True
"""Whether the database backend supports query transactions. Should be explicitly set by initialization code""" """Whether the database backend supports query transactions. Should be explicitly set by initialization code"""
poolable = True poolable = True
"""Whether the database backend supports query transactions. Should be explicitly set by initialization code""" """Whether the database backend supports connection pools. Should be explicitly set by initialization code"""
procedural = True
"""Whether the database backend supports stored procedures"""
localsessions = {}
"""Contains dictionary of sessions initiated by db model components"""
@staticmethod @staticmethod
@ -40,7 +54,7 @@ class SessionBase(Model):
@staticmethod @staticmethod
def connect(dsn, debug=False): def connect(dsn, pool_size=8, debug=False):
"""Create new database connection engine and connect to database backend. """Create new database connection engine and connect to database backend.
:param dsn: DSN string defining connection. :param dsn: DSN string defining connection.
@ -48,14 +62,28 @@ class SessionBase(Model):
""" """
e = None e = None
if SessionBase.poolable: if SessionBase.poolable:
e = create_engine( poolclass = QueuePool
dsn, if pool_size > 1:
max_overflow=50, e = create_engine(
pool_pre_ping=True, dsn,
pool_size=20, max_overflow=pool_size*3,
pool_recycle=10, pool_pre_ping=True,
echo=debug, pool_size=pool_size,
) pool_recycle=60,
poolclass=poolclass,
echo=debug,
)
else:
if debug:
poolclass = AssertionPool
else:
poolclass = StaticPool
e = create_engine(
dsn,
poolclass=poolclass,
echo=debug,
)
else: else:
e = create_engine( e = create_engine(
dsn, dsn,
@ -71,3 +99,24 @@ class SessionBase(Model):
""" """
SessionBase.engine.dispose() SessionBase.engine.dispose()
SessionBase.engine = None SessionBase.engine = None
@staticmethod
def bind_session(session=None):
localsession = session
if localsession == None:
localsession = SessionBase.create_session()
localsession_key = str(id(localsession))
logg.debug('creating new session {}'.format(localsession_key))
SessionBase.localsessions[localsession_key] = localsession
return localsession
@staticmethod
def release_session(session=None):
session.flush()
session_key = str(id(session))
if SessionBase.localsessions.get(session_key) != None:
logg.debug('destroying session {}'.format(session_key))
session.commit()
session.close()

90
chainsyncer/db/models/filter.py
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@ -1,40 +1,88 @@
# standard imports # standard imports
import logging
import hashlib import hashlib
# third-party imports # external imports
from sqlalchemy import Column, String, Integer, BLOB from sqlalchemy import Column, String, Integer, LargeBinary, ForeignKey
from sqlalchemy.ext.hybrid import hybrid_property, hybrid_method from sqlalchemy.ext.hybrid import hybrid_property, hybrid_method
# local imports # local imports
from .base import SessionBase from .base import SessionBase
from .sync import BlockchainSync
zero_digest = bytes(32).hex()
zero_digest = '{:<064s'.format('0') logg = logging.getLogger(__name__)
class BlockchainSyncFilter(SessionBase): class BlockchainSyncFilter(SessionBase):
__tablename__ = 'chain_sync_filter' __tablename__ = 'chain_sync_filter'
chain_sync_id = Column(Integer, ForeignKey='chain_sync.id') chain_sync_id = Column(Integer, ForeignKey('chain_sync.id'))
flags = Column(BLOB) flags_start = Column(LargeBinary)
digest = Column(String) flags = Column(LargeBinary)
digest = Column(String(64))
count = Column(Integer) count = Column(Integer)
@staticmethod
def set(self, names):
def __init__(self, chain_sync, count=0, flags=None, digest=zero_digest):
def __init__(self, names, chain_sync, digest=None):
if len(names) == 0:
digest = zero_digest
elif digest == None:
h = hashlib.new('sha256')
for n in names:
h.update(n.encode('utf-8') + b'\x00')
z = h.digest()
digest = z.hex()
self.digest = digest self.digest = digest
self.count = len(names) self.count = count
self.flags = bytearray((len(names) -1 ) / 8 + 1)
if flags == None:
flags = bytearray(0)
else: # TODO: handle bytes too
bytecount = int((count - 1) / 8 + 1)
flags = flags.to_bytes(bytecount, 'big')
self.flags_start = flags
self.flags = flags
self.chain_sync_id = chain_sync.id self.chain_sync_id = chain_sync.id
def add(self, name):
h = hashlib.new('sha256')
h.update(bytes.fromhex(self.digest))
h.update(name.encode('utf-8'))
z = h.digest()
old_byte_count = int((self.count - 1) / 8 + 1)
new_byte_count = int((self.count) / 8 + 1)
if old_byte_count != new_byte_count:
self.flags = bytearray(1) + self.flags
self.count += 1
self.digest = z.hex()
def start(self):
return (int.from_bytes(self.flags_start, 'big'), self.count, self.digest)
def cursor(self):
return (int.from_bytes(self.flags, 'big'), self.count, self.digest)
def target(self):
n = 0
for i in range(self.count):
n |= (1 << self.count) - 1
return (n, self.count, self.digest)
def clear(self):
self.flags = bytearray(len(self.flags))
def set(self, n):
if n > self.count:
raise IndexError('bit flag out of range')
b = 1 << (n % 8)
i = int(n / 8)
byte_idx = len(self.flags)-1-i
if (self.flags[byte_idx] & b) > 0:
raise AttributeError('Filter bit already set')
flags = bytearray(self.flags)
flags[byte_idx] |= b
self.flags = flags

73
chainsyncer/db/models/sync.py
View File

@ -41,47 +41,51 @@ class BlockchainSync(SessionBase):
:type chain: str :type chain: str
:param session: Session to use. If not specified, a separate session will be created for this method only. :param session: Session to use. If not specified, a separate session will be created for this method only.
:type session: SqlAlchemy Session :type session: SqlAlchemy Session
:returns: True if sync record found :returns: Database primary key id of sync record
:rtype: bool :rtype: number|None
""" """
local_session = False session = SessionBase.bind_session(session)
if session == None:
session = SessionBase.create_session()
local_session = True
q = session.query(BlockchainSync.id) q = session.query(BlockchainSync.id)
q = q.filter(BlockchainSync.blockchain==chain) q = q.filter(BlockchainSync.blockchain==chain)
o = q.first() o = q.first()
if local_session:
session.close() if o == None:
return o == None SessionBase.release_session(session)
return None
sync_id = o.id
SessionBase.release_session(session)
return sync_id
@staticmethod @staticmethod
def get_last_live_height(current, session=None): def get_last(session=None, live=True):
"""Get the most recent open-ended ("live") syncer record. """Get the most recent open-ended ("live") syncer record.
:param current: Current block number
:type current: number
:param session: Session to use. If not specified, a separate session will be created for this method only. :param session: Session to use. If not specified, a separate session will be created for this method only.
:type session: SqlAlchemy Session :type session: SqlAlchemy Session
:returns: Block and transaction number, respectively :returns: Block and transaction number, respectively
:rtype: tuple :rtype: tuple
""" """
local_session = False session = SessionBase.bind_session(session)
if session == None:
session = SessionBase.create_session() q = session.query(BlockchainSync.id)
local_session = True if live:
q = session.query(BlockchainSync) q = q.filter(BlockchainSync.block_target==None)
q = q.filter(BlockchainSync.block_target==None) else:
q = q.filter(BlockchainSync.block_target!=None)
q = q.order_by(BlockchainSync.date_created.desc()) q = q.order_by(BlockchainSync.date_created.desc())
o = q.first() object_id = q.first()
if local_session:
session.close()
if o == None: SessionBase.release_session(session)
return (0, 0)
return (o.block_cursor, o.tx_cursor) if object_id == None:
return None
return object_id[0]
@staticmethod @staticmethod
@ -122,6 +126,8 @@ class BlockchainSync(SessionBase):
""" """
self.block_cursor = block_height self.block_cursor = block_height
self.tx_cursor = tx_height self.tx_cursor = tx_height
self.date_updated = datetime.datetime.utcnow()
return (self.block_cursor, self.tx_cursor,)
def cursor(self): def cursor(self):
@ -165,4 +171,21 @@ class BlockchainSync(SessionBase):
self.tx_cursor = tx_start self.tx_cursor = tx_start
self.block_target = block_target self.block_target = block_target
self.date_created = datetime.datetime.utcnow() self.date_created = datetime.datetime.utcnow()
self.date_modified = datetime.datetime.utcnow() self.date_updated = datetime.datetime.utcnow()
def __str__(self):
return """object_id: {}
start: {}:{}
cursor: {}:{}
target: {}
""".format(
self.id,
self.block_start,
self.tx_start,
self.block_cursor,
self.tx_cursor,
self.block_target,
)

91
chainsyncer/driver.py
View File

@ -2,27 +2,35 @@
import uuid import uuid
import logging import logging
import time import time
import signal
# external imports # external imports
import sqlalchemy
from chainlib.eth.block import ( from chainlib.eth.block import (
block_by_number, block_by_number,
Block, Block,
) )
from chainlib.eth.tx import receipt
# local imports # local imports
from chainsyncer.filter import SyncFilter from chainsyncer.filter import SyncFilter
from chainsyncer.error import (
SyncDone,
NoBlockForYou,
)
logg = logging.getLogger() logg = logging.getLogger(__name__)
def noop_callback(block_number, tx_index, s=None): def noop_callback(block_number, tx_index, s=None):
logg.debug('({},{}) {}'.format(block_number, tx_index, s)) logg.debug('noop callback ({},{}) {}'.format(block_number, tx_index, s))
class Syncer: class Syncer:
running_global = True running_global = True
yield_delay=0.005 yield_delay=0.005
signal_set = False
def __init__(self, backend, loop_callback=noop_callback, progress_callback=noop_callback): def __init__(self, backend, loop_callback=noop_callback, progress_callback=noop_callback):
self.cursor = None self.cursor = None
@ -31,6 +39,22 @@ class Syncer:
self.filter = SyncFilter(backend) self.filter = SyncFilter(backend)
self.progress_callback = progress_callback self.progress_callback = progress_callback
self.loop_callback = loop_callback self.loop_callback = loop_callback
if not Syncer.signal_set:
signal.signal(signal.SIGINT, Syncer.__sig_terminate)
signal.signal(signal.SIGTERM, Syncer.__sig_terminate)
Syncer.signal_set = True
@staticmethod
def __sig_terminate(sig, frame):
logg.warning('got signal {}'.format(sig))
Syncer.terminate()
@staticmethod
def terminate():
logg.info('termination requested!')
Syncer.running_global = False
def chain(self): def chain(self):
@ -44,6 +68,7 @@ class Syncer:
def add_filter(self, f): def add_filter(self, f):
self.filter.add(f) self.filter.add(f)
self.backend.register_filter(str(f))
class BlockPollSyncer(Syncer): class BlockPollSyncer(Syncer):
@ -53,18 +78,25 @@ class BlockPollSyncer(Syncer):
def loop(self, interval, conn): def loop(self, interval, conn):
g = self.backend.get() (g, flags) = self.backend.get()
last_tx = g[1] last_tx = g[1]
last_block = g[0] last_block = g[0]
self.progress_callback(last_block, last_tx, 'loop started') self.progress_callback(last_block, last_tx, 'loop started')
while self.running and Syncer.running_global: while self.running and Syncer.running_global:
if self.loop_callback != None: if self.loop_callback != None:
self.loop_callback(last_block, last_tx) self.loop_callback(last_block, last_tx)
while True: while True and Syncer.running_global:
try: try:
block = self.get(conn) block = self.get(conn)
except Exception: except SyncDone as e:
logg.info('sync done: {}'.format(e))
return self.backend.get()
except NoBlockForYou as e:
break break
# TODO: To properly handle this, ensure that previous request is rolled back
# except sqlalchemy.exc.OperationalError as e:
# logg.error('database error: {}'.format(e))
# break
last_block = block.number last_block = block.number
self.process(conn, block) self.process(conn, block)
start_tx = 0 start_tx = 0
@ -76,10 +108,6 @@ class BlockPollSyncer(Syncer):
class HeadSyncer(BlockPollSyncer): class HeadSyncer(BlockPollSyncer):
def __init__(self, backend, loop_callback=noop_callback, progress_callback=noop_callback):
super(HeadSyncer, self).__init__(backend, loop_callback, progress_callback)
def process(self, conn, block): def process(self, conn, block):
logg.debug('process block {}'.format(block)) logg.debug('process block {}'.format(block))
i = 0 i = 0
@ -87,21 +115,62 @@ class HeadSyncer(BlockPollSyncer):
while True: while True:
try: try:
tx = block.tx(i) tx = block.tx(i)
rcpt = conn.do(receipt(tx.hash))
tx.apply_receipt(rcpt)
self.progress_callback(block.number, i, 'processing {}'.format(repr(tx))) self.progress_callback(block.number, i, 'processing {}'.format(repr(tx)))
self.backend.set(block.number, i) self.backend.set(block.number, i)
self.filter.apply(conn, block, tx) self.filter.apply(conn, block, tx)
except IndexError as e: except IndexError as e:
logg.debug('index error syncer rcpt get {}'.format(e))
self.backend.set(block.number + 1, 0) self.backend.set(block.number + 1, 0)
break break
i += 1 i += 1
def get(self, conn): def get(self, conn):
(block_number, tx_number) = self.backend.get() (height, flags) = self.backend.get()
block_number = height[0]
block_hash = [] block_hash = []
o = block_by_number(block_number) o = block_by_number(block_number)
r = conn.do(o) r = conn.do(o)
if r == None:
raise NoBlockForYou()
b = Block(r) b = Block(r)
logg.debug('get {}'.format(b))
return b return b
def __str__(self):
return '[headsyncer] {}'.format(str(self.backend))
class HistorySyncer(HeadSyncer):
def __init__(self, backend, loop_callback=noop_callback, progress_callback=noop_callback):
super(HeadSyncer, self).__init__(backend, loop_callback, progress_callback)
self.block_target = None
(block_number, flags) = self.backend.target()
if block_number == None:
raise AttributeError('backend has no future target. Use HeadSyner instead')
self.block_target = block_number
def get(self, conn):
(height, flags) = self.backend.get()
if self.block_target < height[0]:
raise SyncDone(self.block_target)
block_number = height[0]
block_hash = []
o = block_by_number(block_number)
r = conn.do(o)
if r == None:
raise NoBlockForYou()
b = Block(r)
return b
def __str__(self):
return '[historysyncer] {}'.format(str(self.backend))

5
chainsyncer/error.py
View File

@ -1,8 +1,11 @@
class LoopDone(Exception): class SyncDone(Exception):
"""Exception raised when a syncing is complete. """Exception raised when a syncing is complete.
""" """
pass pass
class NoBlockForYou(Exception):
pass
class RequestError(Exception): class RequestError(Exception):
pass pass

12
chainsyncer/filter.py
View File

@ -9,6 +9,7 @@ from .error import BackendError
logg = logging.getLogger(__name__) logg = logging.getLogger(__name__)
class SyncFilter: class SyncFilter:
def __init__(self, backend, safe=True): def __init__(self, backend, safe=True):
@ -20,7 +21,7 @@ class SyncFilter:
def add(self, fltr): def add(self, fltr):
if getattr(fltr, 'filter') == None: if getattr(fltr, 'filter') == None:
raise ValueError('filter object must implement have method filter') raise ValueError('filter object must implement have method filter')
logg.debug('added filter {}'.format(str(fltr))) logg.debug('added filter "{}"'.format(str(fltr)))
self.filters.append(fltr) self.filters.append(fltr)
@ -32,10 +33,15 @@ class SyncFilter:
except sqlalchemy.exc.TimeoutError as e: except sqlalchemy.exc.TimeoutError as e:
self.backend.disconnect() self.backend.disconnect()
raise BackendError('database connection fail: {}'.format(e)) raise BackendError('database connection fail: {}'.format(e))
i = 0
for f in self.filters: for f in self.filters:
i += 1
logg.debug('applying filter {}'.format(str(f))) logg.debug('applying filter {}'.format(str(f)))
f.filter(conn, block, tx, self.backend.db_session) f.filter(conn, block, tx, session)
self.backend.disconnect() self.backend.complete_filter(i)
if session != None:
self.backend.disconnect()
class NoopFilter: class NoopFilter:

6
requirements.txt
View File

@ -1,6 +1,6 @@
psycopg2==2.8.6 psycopg2==2.8.6
SQLAlchemy==1.3.20 SQLAlchemy==1.3.20
confini~=0.3.6b2 confini~=0.3.6rc3
semver==2.13.0 semver==2.13.0
hexathon~=0.0.1a3 hexathon~=0.0.1a7
chainlib~=0.0.1a15 chainlib~=0.0.2a1

8
setup.cfg
View File

@ -1,6 +1,6 @@
[metadata] [metadata]
name = chainsyncer name = chainsyncer
version = 0.0.1a10 version = 0.0.1a21
description = Generic blockchain syncer driver description = Generic blockchain syncer driver
author = Louis Holbrook author = Louis Holbrook
author_email = dev@holbrook.no author_email = dev@holbrook.no
@ -21,13 +21,19 @@ licence_files =
LICENSE.txt LICENSE.txt
[options] [options]
include_package_data = True
python_requires = >= 3.6 python_requires = >= 3.6
packages = packages =
chainsyncer chainsyncer
chainsyncer.db chainsyncer.db
chainsyncer.db.migrations
chainsyncer.db.models chainsyncer.db.models
chainsyncer.runnable chainsyncer.runnable
[options.package_data]
* =
sql/*
#[options.entry_points] #[options.entry_points]
#console_scripts = #console_scripts =
# blocksync-celery = chainsyncer.runnable.tracker:main # blocksync-celery = chainsyncer.runnable.tracker:main

16
sql/postgresql/1.sql
View File

@ -1,4 +1,4 @@
DROP TABLE chain_sync; DROP TABLE IF EXISTS chain_sync CASCADE;
CREATE TABLE IF NOT EXISTS chain_sync ( CREATE TABLE IF NOT EXISTS chain_sync (
id serial primary key not null, id serial primary key not null,
blockchain varchar not null, blockchain varchar not null,
@ -6,21 +6,7 @@ CREATE TABLE IF NOT EXISTS chain_sync (
tx_start int not null default 0, tx_start int not null default 0,
block_cursor int not null default 0, block_cursor int not null default 0,
tx_cursor int not null default 0, tx_cursor int not null default 0,
flags bytea not null,
num_flags int not null,
block_target int default null, block_target int default null,
date_created timestamp not null, date_created timestamp not null,
date_updated timestamp default null date_updated timestamp default null
); );
DROP TABLE chain_sync_filter;
CREATE TABLE IF NOT EXISTS chain_sync_filter (
id serial primary key not null,
chain_sync_id int not null,
flags bytea default null,
count int not null default 0,
digest char(64) not null default '0000000000000000000000000000000000000000000000000000000000000000',
CONSTRAINT fk_chain_sync
FOREIGN KEY(chain_sync_id)
REFERENCES chain_sync(id)
);

12
sql/postgresql/2.sql Normal file
View File

@ -0,0 +1,12 @@
DROP TABLE IF EXISTS chain_sync_filter;
CREATE TABLE IF NOT EXISTS chain_sync_filter (
id serial primary key not null,
chain_sync_id integer not null,
flags bytea default null,
flags_start bytea default null,
count integer not null default 0,
digest char(64) not null,
CONSTRAINT fk_chain_sync
FOREIGN KEY(chain_sync_id)
REFERENCES chain_sync(id)
);

14
sql/sqlite/1.sql
View File

@ -1,13 +1,11 @@
CREATE TABLE IF NOT EXISTS chain_sync ( CREATE TABLE IF NOT EXISTS chain_sync (
id serial primary key not null, id integer primary key autoincrement,
blockchain varchar not null, blockchain varchar not null,
block_start int not null default 0, block_start integer not null default 0,
tx_start int not null default 0, tx_start integer not null default 0,
block_cursor int not null default 0, block_cursor integer not null default 0,
tx_cursor int not null default 0, tx_cursor integer not null default 0,
flags bytea not null, block_target integer default null,
num_flags int not null,
block_target int default null,
date_created timestamp not null, date_created timestamp not null,
date_updated timestamp default null date_updated timestamp default null
); );

9
sql/sqlite/2.sql
View File

@ -1,9 +1,10 @@
CREATE TABLE IF NOT EXISTS chain_sync_filter ( CREATE TABLE IF NOT EXISTS chain_sync_filter (
id serial primary key not null, id integer primary key autoincrement not null,
chain_sync_id int not null, chain_sync_id integer not null,
flags bytea default null, flags bytea default null,
count int not null default 0, flags_start bytea default null,
digest char(64) not null default '0000000000000000000000000000000000000000000000000000000000000000', count integer not null default 0,
digest char(64) not null,
CONSTRAINT fk_chain_sync CONSTRAINT fk_chain_sync
FOREIGN KEY(chain_sync_id) FOREIGN KEY(chain_sync_id)
REFERENCES chain_sync(id) REFERENCES chain_sync(id)

12
tests/base.py
View File

@ -1,13 +1,21 @@
# standard imports
import logging
import unittest import unittest
import tempfile import tempfile
import os import os
#import pysqlite #import pysqlite
# external imports
from chainlib.chain import ChainSpec
# local imports
from chainsyncer.db import dsn_from_config from chainsyncer.db import dsn_from_config
from chainsyncer.db.models.base import SessionBase from chainsyncer.db.models.base import SessionBase
script_dir = os.path.realpath(os.path.dirname(__file__)) script_dir = os.path.realpath(os.path.dirname(__file__))
logging.basicConfig(level=logging.DEBUG)
class TestBase(unittest.TestCase): class TestBase(unittest.TestCase):
@ -23,7 +31,7 @@ class TestBase(unittest.TestCase):
SessionBase.poolable = False SessionBase.poolable = False
SessionBase.transactional = False SessionBase.transactional = False
SessionBase.procedural = False SessionBase.procedural = False
SessionBase.connect(dsn, debug=True) SessionBase.connect(dsn, debug=False)
f = open(os.path.join(script_dir, '..', 'sql', 'sqlite', '1.sql'), 'r') f = open(os.path.join(script_dir, '..', 'sql', 'sqlite', '1.sql'), 'r')
sql = f.read() sql = f.read()
@ -39,6 +47,8 @@ class TestBase(unittest.TestCase):
conn = SessionBase.engine.connect() conn = SessionBase.engine.connect()
conn.execute(sql) conn.execute(sql)
self.chain_spec = ChainSpec('evm', 'foo', 42, 'bar')
def tearDown(self): def tearDown(self):
SessionBase.disconnect() SessionBase.disconnect()
os.unlink(self.db_path) os.unlink(self.db_path)

156
tests/test_database.py Normal file
View File

@ -0,0 +1,156 @@
# standard imports
import unittest
import logging
# external imports
from chainlib.chain import ChainSpec
# local imports
from chainsyncer.db.models.base import SessionBase
from chainsyncer.db.models.filter import BlockchainSyncFilter
from chainsyncer.backend import SyncerBackend
# testutil imports
from tests.base import TestBase
logg = logging.getLogger()
class TestDatabase(TestBase):
def test_backend_live(self):
s = SyncerBackend.live(self.chain_spec, 42)
self.assertEqual(s.object_id, 1)
backend = SyncerBackend.first(self.chain_spec)
#SyncerBackend(self.chain_spec, sync_id)
self.assertEqual(backend.object_id, 1)
bogus_chain_spec = ChainSpec('bogus', 'foo', 13, 'baz')
sync_id = SyncerBackend.first(bogus_chain_spec)
self.assertIsNone(sync_id)
def test_backend_filter(self):
s = SyncerBackend.live(self.chain_spec, 42)
s.connect()
filter_id = s.db_object_filter.id
s.disconnect()
session = SessionBase.create_session()
o = session.query(BlockchainSyncFilter).get(filter_id)
self.assertEqual(len(o.flags), 0)
session.close()
for i in range(9):
s.register_filter(str(i))
s.connect()
filter_id = s.db_object_filter.id
s.disconnect()
session = SessionBase.create_session()
o = session.query(BlockchainSyncFilter).get(filter_id)
self.assertEqual(len(o.flags), 2)
(t, c, d) = o.target()
self.assertEqual(t, (1 << 9) - 1)
for i in range(9):
o.set(i)
(f, c, d) = o.cursor()
self.assertEqual(f, t)
self.assertEqual(c, 9)
self.assertEqual(d, o.digest)
session.close()
def test_backend_retrieve(self):
s = SyncerBackend.live(self.chain_spec, 42)
s.register_filter('foo')
s.register_filter('bar')
s.register_filter('baz')
s.set(42, 13)
s = SyncerBackend.first(self.chain_spec)
self.assertEqual(s.get(), ((42,13), 0))
def test_backend_initial(self):
with self.assertRaises(ValueError):
s = SyncerBackend.initial(self.chain_spec, 42, 42)
with self.assertRaises(ValueError):
s = SyncerBackend.initial(self.chain_spec, 42, 43)
s = SyncerBackend.initial(self.chain_spec, 42, 13)
s.set(43, 13)
s = SyncerBackend.first(self.chain_spec)
self.assertEqual(s.get(), ((43,13), 0))
self.assertEqual(s.start(), ((13,0), 0))
def test_backend_resume(self):
s = SyncerBackend.resume(self.chain_spec, 666)
self.assertEqual(len(s), 0)
s = SyncerBackend.live(self.chain_spec, 42)
original_id = s.object_id
s = SyncerBackend.resume(self.chain_spec, 666)
self.assertEqual(len(s), 1)
resumed_id = s[0].object_id
self.assertEqual(resumed_id, original_id + 1)
self.assertEqual(s[0].get(), ((42, 0), 0))
def test_backend_resume_when_completed(self):
s = SyncerBackend.live(self.chain_spec, 42)
s = SyncerBackend.resume(self.chain_spec, 666)
s[0].set(666, 0)
s = SyncerBackend.resume(self.chain_spec, 666)
self.assertEqual(len(s), 0)
def test_backend_resume_several(self):
s = SyncerBackend.live(self.chain_spec, 42)
s.set(43, 13)
s = SyncerBackend.resume(self.chain_spec, 666)
SyncerBackend.live(self.chain_spec, 666)
s[0].set(123, 2)
s = SyncerBackend.resume(self.chain_spec, 1024)
SyncerBackend.live(self.chain_spec, 1024)
self.assertEqual(len(s), 2)
self.assertEqual(s[0].target(), (666, 0))
self.assertEqual(s[0].get(), ((123, 2), 0))
self.assertEqual(s[1].target(), (1024, 0))
self.assertEqual(s[1].get(), ((666, 0), 0))
def test_backend_resume_filter(self):
s = SyncerBackend.live(self.chain_spec, 42)
s.register_filter('foo')
s.register_filter('bar')
s.register_filter('baz')
s.set(43, 13)
s.complete_filter(0)
s.complete_filter(2)
s = SyncerBackend.resume(self.chain_spec, 666)
(pair, flags) = s[0].get()
self.assertEqual(flags, 5)
if __name__ == '__main__':
unittest.main()