def from_json(chain_json):
"""
Deserialize a list of serialized blocks into a Blockchain instance.
The results will containg a chain list of Block instances.
"""
blockchain = Blockchain()
blockchain.chain = list(
map(lambda block_json: Block.from_json(block_json), chain_json))
return blockchain
def message(self, pubnub, message_object):
print(
f'\n-- Channel: {message_object.channel} | Message: {message_object.message}'
)
if message_object.channel == CHANNELS['BLOCK']:
block = Block.from_json(message_object.message)
# [:] -> all the elements in the array, in that case all blocks in chain
potential_chain = self.blockchain.chain[:]
potential_chain.append(block)
try:
self.blockchain.replace_chain(potential_chain)
self.transaction_pool.clear_blockchain_transactions(
self.blockchain)
print('\n -- Successfully replaced the local chain')
except Exception as e:
print(f'\n -- Did not replace chain: {e}')
elif message_object.channel == CHANNELS['TRANSACTION']:
transaction = Transaction.from_json(message_object.message)
self.transaction_pool.set_transaction(transaction)
print('\n -- Set the new transaction in the transaction pool')