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cleanup lookupblocks

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This commit is contained in:
Kevin 2020-06-30 17:08:32 -05:00
parent e174b4a636
commit 63e676ed6f
1 changed files with 37 additions and 22 deletions
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59
src/communicatorutils/lookupblocks.py
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@ -1,4 +1,4 @@
"""Onionr - Private P2P Communication
"""Onionr - Private P2P Communication.
Lookup new blocks with the communicator using a random connected peer
"""
@ -8,7 +8,7 @@ import logger
import onionrproofs
from onionrutils import stringvalidators, epoch
from communicator import peeraction, onlinepeers
from coredb import blockmetadb
from coredb.blockmetadb import get_block_list
from utils import reconstructhash
from onionrblocks import onionrblacklist
import onionrexceptions
@ -36,20 +36,24 @@ def lookup_blocks_from_communicator(comm_inst):
logger.info('Looking up new blocks')
tryAmount = 2
newBlocks = ''
existingBlocks = blockmetadb.get_block_list() # List of existing saved blocks
triedPeers = [] # list of peers we've tried this time around
maxBacklog = 1560 # Max amount of *new* block hashes to have already in queue, to avoid memory exhaustion
lastLookupTime = 0 # Last time we looked up a particular peer's list
# List of existing saved blocks
existingBlocks = get_block_list()
triedPeers = [] # list of peers we've tried this time around
# Max amount of *new* block hashes to have in queue
maxBacklog = 1560
lastLookupTime = 0 # Last time we looked up a particular peer's list
new_block_count = 0
for i in range(tryAmount):
listLookupCommand = 'getblocklist' # This is defined here to reset it each time
# Defined here to reset it each time, time offset is added later
listLookupCommand = 'getblocklist'
if len(comm_inst.blockQueue) >= maxBacklog:
break
if not comm_inst.isOnline:
break
# check if disk allocation is used
if comm_inst.storage_counter.is_full():
logger.debug('Not looking up new blocks due to maximum amount of allowed disk space used')
logger.debug(
'Not looking up new blocks due to maximum amount of disk used')
break
try:
# select random online peer
@ -65,32 +69,41 @@ def lookup_blocks_from_communicator(comm_inst):
continue
triedPeers.append(peer)
# Get the last time we looked up a peer's stamp to only fetch blocks since then.
# Get the last time we looked up a peer's stamp,
# to only fetch blocks since then.
# Saved in memory only for privacy reasons
try:
lastLookupTime = comm_inst.dbTimestamps[peer]
except KeyError:
lastLookupTime = epoch.get_epoch() - config.get("general.max_block_age", onionrvalues.DEFAULT_EXPIRE)
lastLookupTime = epoch.get_epoch() - \
config.get("general.max_block_age",
onionrvalues.DEFAULT_EXPIRE)
listLookupCommand += '?date=%s' % (lastLookupTime,)
try:
newBlocks = peeraction.peer_action(comm_inst, peer, listLookupCommand) # get list of new block hashes
newBlocks = peeraction.peer_action(
comm_inst,
peer, listLookupCommand) # get list of new block hashes
except Exception as error:
logger.warn('Could not get new blocks from %s.' % peer, error = error)
logger.warn(
f'Could not get new blocks from {peer}.',
error=error)
newBlocks = False
else:
comm_inst.dbTimestamps[peer] = epoch.get_rounded_epoch(roundS=60)
if newBlocks != False:
if newBlocks != False: # noqa
# if request was a success
for i in newBlocks.split('\n'):
if stringvalidators.validate_hash(i):
i = reconstructhash.reconstruct_hash(i)
# if newline seperated string is valid hash
if not i in existingBlocks:
# if block does not exist on disk and is not already in block queue
# if block does not exist on disk + is not already in queue
if i not in existingBlocks:
if i not in comm_inst.blockQueue:
if onionrproofs.hashMeetsDifficulty(i) and not blacklist.inBlacklist(i):
if onionrproofs.hashMeetsDifficulty(i) and \
not blacklist.inBlacklist(i):
if len(comm_inst.blockQueue) <= 1000000:
comm_inst.blockQueue[i] = [peer] # add blocks to download queue
# add blocks to download queue
comm_inst.blockQueue[i] = [peer]
new_block_count += 1
else:
if peer not in comm_inst.blockQueue[i]:
@ -100,7 +113,9 @@ def lookup_blocks_from_communicator(comm_inst):
block_string = ""
if new_block_count > 1:
block_string = "s"
logger.info('Discovered %s new block%s' % (new_block_count, block_string), terminal=True)
comm_inst.download_blocks_timer.count = int(comm_inst.download_blocks_timer.frequency * 0.99)
logger.info(
f'Discovered {new_block_count} new block{block_string}',
terminal=True)
comm_inst.download_blocks_timer.count = \
int(comm_inst.download_blocks_timer.frequency * 0.99)
comm_inst.decrementThreadCount('lookup_blocks_from_communicator')
return