def resolve(self):
winner_chain = self.chain
replace = False
for node in self.__peer_nodes:
url = "http://{}/chain".format(node)
try:
response = requests.get(url)
node_chain = response.json()
node_chain = [JBlock(block["index"], block["previous_hash"],
[Transaction(transaction["sender"], transaction["recipient"], transaction["signature"], transaction["amount"]) for transaction in block["transactions"]],
block["proof"], block["timestamp"]) for block in node_chain]
node_chain_lenght = len(node_chain)
local_chain_lenght = len(self.chain)
if node_chain_lenght > local_chain_lenght and Verification.validate_j_chain(node_chain):
winner_chain = node_chain
replace = True
except requests.exceptions.ConnectionError:
continue
self.resolve_conflicts = False
self.chain = winner_chain
if replace:
self.open_transactions = []
FileHandler.save_j_chain(self)
return replace
def listen_for_input(self):
start = True
quit_j_chain = self.load_or_create_wallet()
while not quit_j_chain:
if start:
self.print_possibilities()
start = False
decision = self.get_user_decision()
if decision == "Q": # quit
quit_j_chain = True
self.print_j_chain_elements()
elif decision == "T": # transaction
if self.wallet.public_key is None:
print(
"You got no wallet, please load (L) or create (W) one."
)
else:
recipient, amount = self.get_transaction_input()
signature = self.wallet.sign_transaction(
self.wallet.public_key, recipient, amount)
self.j_chain.add_transaction(self.wallet.public_key,
recipient, signature, amount)
elif decision == "M": # mine block
if self.wallet.public_key is None:
print(
"You got no wallet, please load (L) or create (W) one."
)
else:
self.j_chain.mine_block()
elif decision == "P": # Participants
print([
participant + ": " +
str(self.j_chain.get_balance(participant))
for participant in self.participants
])
else:
print("This action is not available!")
if not Verification.validate_j_chain(self.j_chain.chain):
break
