Onionr/onionr/blockimporter.py

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Python
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'''
Onionr - P2P Microblogging Platform & Social network
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/>.
'''
import core, onionrexceptions, logger
def importBlockFromData(content, coreInst):
retData = False
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dataHash = coreInst._crypto.sha3Hash(content)
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if coreInst._blacklist.inBlacklist(dataHash):
raise onionrexceptions.BlacklistedBlock('%s is a blacklisted block' % (dataHash,))
if not isinstance(coreInst, core.Core):
raise Exception("coreInst must be an Onionr core instance")
try:
content = content.encode()
except AttributeError:
pass
metas = coreInst._utils.getBlockMetadataFromData(content) # returns tuple(metadata, meta), meta is also in metadata
metadata = metas[0]
if coreInst._utils.validateMetadata(metadata, metas[2]): # check if metadata is valid
if coreInst._crypto.verifyPow(content): # check if POW is enough/correct
logger.info('Block passed proof, saving.')
try:
blockHash = coreInst.setData(content)
except onionrexceptions.DiskAllocationReached:
pass
else:
coreInst.addToBlockDB(blockHash, dataSaved=True)
coreInst._utils.processBlockMetadata(blockHash) # caches block metadata values to block database
retData = True
return retData