def message(self, pubnub, message_obj):
print(
f"\n -- Channel: {message_obj.channel} | Message: {message_obj.message}"
)
if (message_obj.channel == CHANNELS["BLOCK"]):
prospective_block = Block.deserialize_from_json(
message_obj.message)
prospective_chain = self.blockchain.chain[:]
prospective_chain.append(prospective_block)
try:
self.blockchain.surrogate_chain(prospective_chain)
# purge recorded Tx from Pool
self.transaction_pool.purge(self.blockchain)
print(f"\n -- Chain surrogation successful.")
except Exception as err:
print(f"\n -- Chain surrogation failed. See: {err}")
elif (message_obj.channel == CHANNELS["TRANSACTION"]):
transaction = Transaction.deserialize_from_json(
message_obj.message)
self.transaction_pool.set_transaction(transaction)
print(
"\n -- New transaction successfully broadcast, added to the transaction pool."
)
def deserialize_from_json(serialized_blockchain_obj):
"""
De-serialize a given list of serialized blocks into a Blockchain instance.
"""
blockchain = Blockchain()
blockchain.chain = list(
map(
lambda serialized_block_obj: Block.deserialize_from_json(
serialized_block_obj), serialized_blockchain_obj))
return blockchain