75 lines
2.5 KiB
Python
Executable File
75 lines
2.5 KiB
Python
Executable File
'''
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Onionr - Private P2P Communication
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Import block data and save it
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'''
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from onionrexceptions import BlacklistedBlock
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from onionrexceptions import DiskAllocationReached
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from onionrexceptions import InvalidProof
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from onionrexceptions import InvalidMetadata
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import logger
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from onionrutils import validatemetadata
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from onionrutils import blockmetadata
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from coredb import blockmetadb
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import onionrstorage
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import onionrcrypto as crypto
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from onionrcrypto.hashers import sha3_hash
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from onionrproofs.vdf import verify
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from . 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 import_block_from_data(content):
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blacklist = onionrblacklist.OnionrBlackList()
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ret_data = False
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try:
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content = content.encode()
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except AttributeError:
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pass
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data_hash = crypto.hashers.sha3_hash(content)
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if blacklist.inBlacklist(data_hash):
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raise BlacklistedBlock(f'%s is a blacklisted block {data_hash}')
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# returns tuple(metadata, meta), meta is also in metadata
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metas = blockmetadata.get_block_metadata_from_data(content)
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metadata = metas[0]
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# check if metadata is valid
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if validatemetadata.validate_metadata(metadata, metas[2]):
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# check if POW is enough/correct
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if verify(content, sha3_hash(content)):
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logger.info(f'Imported block passed proof, saving: {data_hash}.',
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terminal=True)
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try:
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blockHash = onionrstorage.set_data(content)
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except DiskAllocationReached:
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logger.warn('Failed to save block due to full disk allocation')
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raise
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else:
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blockmetadb.add_to_block_DB(blockHash, dataSaved=True)
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# caches block metadata values to block database
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blockmetadata.process_block_metadata(blockHash)
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ret_data = blockHash
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else:
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raise InvalidProof
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else:
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raise InvalidMetadata
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return ret_data
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