Onionr/src/communicatorutils/downloadblocks/shoulddownload.py

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"""Onionr - Private P2P Communication.
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Check if a block should be downloaded
(if we already have it or its blacklisted or not)
"""
from coredb import blockmetadb
from onionrblocks import onionrblacklist
"""
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This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
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def should_download(shared_state, block_hash) -> bool:
"""Return bool for if a (assumed to exist) block should be downloaded."""
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blacklist = onionrblacklist.OnionrBlackList()
should = True
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kv: "DeadSimpleKV" = shared_state.get_by_string("DeadSimpleKV")
if block_hash in blockmetadb.get_block_list():
# Don't download block we have
should = False
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else:
if blacklist.inBlacklist(block_hash):
# Don't download blacklisted block
should = False
if should is False:
# Remove block from communicator queue if it shouldn't be downloaded
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try:
del kv.get('blockQueue')[block_hash]
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except KeyError:
pass
return should