Onionr/onionr/blockimporter.py

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'''
Onionr - Private P2P Communication
Import block data and save it
'''
'''
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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import onionrexceptions, logger
from onionrutils import validatemetadata, blockmetadata
from coredb import blockmetadb
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import onionrblacklist, onionrstorage
import onionrcrypto as crypto
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def importBlockFromData(content):
blacklist = onionrblacklist.OnionrBlackList()
retData = False
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try:
content = content.encode()
except AttributeError:
pass
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dataHash = crypto.hashers.sha3_hash(content)
if blacklist.inBlacklist(dataHash):
raise onionrexceptions.BlacklistedBlock('%s is a blacklisted block' % (dataHash,))
metas = blockmetadata.get_block_metadata_from_data(content) # returns tuple(metadata, meta), meta is also in metadata
metadata = metas[0]
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if validatemetadata.validate_metadata(metadata, metas[2]): # check if metadata is valid
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if crypto.cryptoutils.verify_POW(content): # check if POW is enough/correct
logger.info('Block passed proof, saving.', terminal=True)
try:
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blockHash = onionrstorage.set_data(content)
except onionrexceptions.DiskAllocationReached:
logger.warn('Failed to save block due to full disk allocation')
else:
blockmetadb.add_to_block_DB(blockHash, dataSaved=True)
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blockmetadata.process_block_metadata(blockHash) # caches block metadata values to block database
retData = True
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else:
raise onionrexceptions.InvalidProof
return retData