class Node:
def __init__(self):
# self.id = str(uuid4())
self.wallet = Wallet()
self.wallet.create_key()
self.blockchain = Blockchain(self.wallet.public_key)
def get_transaction_value(self):
recipient = input('Your recipient is: ')
amount = float(input('Your transaction amount is: '))
return recipient, amount
def get_user_choice(self):
user_input = input('Yourt choice: ')
return user_input
def print_blockchain_elements(self):
for block in self.blockchain.get_chain():
print('Outputting Block')
print(block)
def listen_for_input(self):
while True:
print('Please choose')
print('1: Add a new transcation value')
print('2: Mine a new block')
print('3: Output the blockchain blocks')
print('4: Check transaction validity')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save wallet')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount = tx_data
signature = self.wallet.sign_transaction(self.wallet.public_key, recipient, amount)
if self.blockchain.add_transaction(recipient, self.wallet.public_key, signature, amount=amount):
print('Added transaction!')
else:
print('Transaction failed!')
print(self.blockchain.get_open_tx())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('No wallet, mining failed!')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_tx(), self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There is invalid transaction')
elif user_choice == '5':
self.wallet.create_key()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == '6':
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == '7':
self.wallet.save_keys()
elif user_choice == 'q':
break
else:
print('Input was invalid')
if not Verification.verify_chain(self.blockchain.get_chain()):
self.print_blockchain_elements()
print('Invalid blockchain!')
break
print('Balacne of {}: {:6.2f}'.format(self.wallet.public_key, self.blockchain.get_balance()))
else:
print('User left!')
print('Done!')
class Node:
def __init__(self):
self.wallet = Wallet()
self.wallet.create_key()
self.blockchain = Blockchain(self.wallet.public_key)
def print_blockchain_element(self):
#Outputs the blockchain list to the console print (blockchain)
#print('Complete blockchain is', blockchain)
for block in self.blockchain.get_chain():
print('Outputting Block')
print(block)
else:
#this will execute whenever the for loop is over either terminated or finished with all iterables
print('-' * 20)
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please choose")
print("1: If you want to add a transaction")
print("2: If you want to add mine a block")
print("3: If you want to show the blockchain")
print("4: Check the validity of the transaction")
print("5: Create Private and Public Key")
print("6: Load existing Public and Private Key")
print("7: Save keys")
print("q: If you want to quit")
user_choice = self.get_user_choice()
if user_choice == '1':
# Takes transaction from user
tx_data = self.blockchain.get_user_transaction()
#unpacking tuple tx_data
#this will unpack the tuple tx_data and store 1st value in recipient and 2nd value in amount.
recipient, amount = tx_data
signature = self.wallet.sign_transaction(
self.wallet.public_key, recipient, amount)
if self.blockchain.add_transaction(
recipient,
self.wallet.public_key,
signature,
amount=amount
): #as we were skiping sender so we have to mention the name of the argument i.,e amount
print('Added transaction!!!')
else:
print('Failed Transaction!!!')
print(self.blockchain.get_open_transaction())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining Failed, check your wallet!!!')
elif user_choice == '3':
self.print_blockchain_element()
elif user_choice == '4':
if Verification.verify_alltransactions(
self.blockchain.get_open_transaction(),
self.blockchain.get_balance):
print("All transactions are valid")
else:
print("Transactions are invalid!!!")
elif user_choice == '5':
self.wallet.create_key()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == '6':
self.wallet.load_key()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == '7':
self.wallet.save_key()
elif user_choice == 'q':
waiting_for_input = False
else:
print(
"Input is invalid, please enter a valid value from the list"
)
if not Verification.verify_chain(self.blockchain.get_chain()):
self.print_blockchain_element()
print("Invalid Blockchain")
break
#String Formatting {:6.2F} 6 reserves 6 places default to the right and .2F says 2 decimal points
print('Balance of {} is {:6.2F}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
#this will execute whenever the while loop is over either terminated or finished with all iterables
print("User left!!!")
print('Done!')
def get_user_choice(self):
return input("Your choice")
