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