def listen_for_input(self):
waiting_for_input = True
# A while loop for the user input interface
# It's a loop that exits once waiting_for_input becomes False or when break is called
while waiting_for_input:
print("Please choose:")
print("1: Add a new transaction 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 keys")
print("q: Quit")
user_choice = self.get_user_choice()
if "1" == user_choice:
tx_data = self.get_transaction_value()
recipient, amount = tx_data
# Add the transaction amount to the blockchain
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_transactions())
elif "2" == user_choice:
if not self.blockchain.mine_block():
print("Mining failed. Got no wallet?")
elif "3" == user_choice:
self.print_blockchain_elements()
elif "4" == user_choice:
if Verification.verify_transactions(self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transactions")
elif "5" == user_choice:
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif "6" == user_choice:
self.wallet.load_key()
self.blockchain = Blockchain(self.wallet.public_key)
elif "7" == user_choice:
self.wallet.save_keys()
elif "q" == user_choice:
# This will lead to the loop to exist because it's running condition becomes False
waiting_for_input = False
else:
print("Input was invalid, please pick a value from the list!")
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print("Invalid blockchain!")
# Break out of the loop
break
print("Balance of '{}': {:6.2f}".format(self.wallet.public_key, self.blockchain.get_balance()))
else:
print("User left!")
print("Done!")
def listen_for_input(self):
"""Starts the node and waits for user input."""
waiting_for_input = True
# A while loop for the user input interface
# It's a loop that exits once waiting_for_input becomes False or when break is called
while waiting_for_input:
print('Please choose')
print('1: Add a new transaction 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 keys')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount = tx_data
# Add the transaction amount to the blockchain
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_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet?')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == '5':
self.wallet.create_keys()
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':
# This will lead to the loop to exist because it's running condition becomes False
waiting_for_input = False
else:
print('Input was invalid, please pick a value from the list!')
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain!')
# Break out of the loop
break
print('Balance of {}: {:6.2f}'.format(self.wallet.public_key, self.blockchain.get_balance()))
else:
print('User left!')
print('Done!')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose')
print('1: Add a new transaction 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 Keys')
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_last_blockchain_value)
elif user_choice == '2':
if not self.blockchain.mine_block():
print('I left my wallet in El Segundo')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transactions,
self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Input was invalid, please pick a value from the list!')
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain!')
break
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print('User left!')
print('Done!')
def UI(self):
while self.waiting_for_input:
print('Enter Choice')
print('1:Add transaction')
print('2:Mine bLock')
print('3: Create Wallet')
print('4: Check Transaction valididty: ')
print('5:Print bocks')
print('6: Load Wallet')
print('7: Save Keys')
print("q:Quit")
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
receipent, amount = tx_data
signature = self.wallet.sign_transaction(
self.wallet.public_key, receipent, amount)
if self.blockchain.add_transaction(
receipent=receipent,
sender=self.wallet.public_key,
signature=signature,
amount=amount):
print("Successful")
else:
print("Failed")
# print(open_transaction)
elif user_choice == '2':
if not self.blockchain.mine_block():
print("Mining Failed")
elif user_choice == '3':
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transaction(),
self.blockchain.get_balance):
print("Valid Transaction")
else:
print("Invalid transaction")
elif user_choice == '5':
self.print_blockchain()
elif user_choice == '6':
self.wallet.load_keys()
print('Loaded')
elif user_choice == '7':
if self.wallet.private_key is not None and self.wallet.public_key is not None:
self.wallet.save_keys()
print('Saved')
elif user_choice == 'q':
self.waiting_for_input = False
else:
print("Invalid Choice")
if not Verification.verify_chain(self.blockchain.get_chain()):
print("Invalid Blockchain")
break
print('Balance of {} : {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print("User Left")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please choose:")
print("1: Add a new transaction value")
print("2: Min 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 Keys")
print("q: To 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_transactions())
elif (user_choice == "2"):
if not self.blockchain.mine_block():
print("Mining failed. Got no Wallet?")
elif (user_choice == "3"):
self.print_blockchainelements()
elif (user_choice == "4"):
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print("All transactions are valid")
else:
print("A transaction is invalid")
elif (user_choice == "5"):
self.wallet.create_keys()
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"):
waiting_for_input = False
else:
print("Input was invalid, please pick a value from the list")
if Verification.verify_chain(self.blockchain.chain) == False:
print("invalid blockchain")
waiting_for_input = False
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print("User left!")
print("Done")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please Choose")
print("1: Add a new trasaction 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 keys ")
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_transactions(self.wallet.public_key, recipient, amount)
if self.blockchain.add_transaction(recipient, self.wallet.public_key, amount, signature):
print('Added Transaction')
else:
print('Transaction Failed')
print(self.blockchain.get_open_transactions())
elif user_choice == "2":
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet')
elif user_choice == "3":
self.print_blockchain_element()
elif user_choice == "4":
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transactions")
elif user_choice == "5":
self.wallet.create_keys()
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":
if self.wallet.public_key != None and self.wallet.private_key != None:
self.wallet.save_keys()
elif user_choice == "q":
waiting_for_input = False
else:
print("Invalid input. Please select a value from the list")
if not Verification.verify_chain(self.blockchain.get_chain()):
print("Invalid blockchain")
break
print(
f'Balance of {self.wallet.public_key}: {self.blockchain.get_balance():6.2f}')
else:
print("User left")
print('Done')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('\n Please choose')
print('1: Add a new transaction value')
print('2: Mine a new block')
print('3: Output the blockchain blocks')
print('4: Check transactions validity')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save keys')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
recipient, amount = self.get_transaction_value()
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 \n")
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print("Mining has failed. Got no wallet?")
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transactions")
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Input was invalid, please pick a value from the list!')
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain!')
break
print(
f"Balance of {self.wallet.public_key}: {self.blockchain.get_balance()}"
)
print(self.blockchain.get_balance())
else:
print('User left!')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose:')
print('1: Add a new transaction value')
print('2: Mine the current block')
print('3: Ouput the blockchain blocks')
print('4: Verify transactions validitya')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save keys')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
recipient, amount = self.get_transaction_value()
signature = self.wallet.sign_transaction(
self.wallet.public_key, recipient, amount)
if self.blockchain.add_transaction(self.wallet.public_key,
recipient, signature,
amount):
print('Transction succeeded')
else:
print('Transaction failed')
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet?')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('Transactions are valid')
else:
print('There is an invalid transaction')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Input was invalid!!')
if self.blockchain != None and (not Verification.verify_chain(
self.blockchain.chain)):
print('Invalid blockchain')
break
print('Done')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('---Choose your action---')
print('1: Add new transactin value.')
print('2: Mine a new block.')
print('3: Output the blockchain.')
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('New transaction was added!')
else:
print('Transaction failed! Error.')
elif user_choice == '2':
if self.blockchain.mine_block():
print('Successfully mined.')
else:
print('Mining faled. Got no wallet.')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('All transactions is valid.')
else:
print('Transactions validation is faled!')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Invalid input. Try again.')
if not Verification.verify_chain(self.blockchain.chain):
print('ERROR! Chain is not valid!')
break
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
print('Goodbye.')
def listen_for_input(self):
while True:
choice = self.get_menu_input()
if choice == 1:
tx_recipient, tx_amount = self.get_transaction_input()
signature = self.wallet.sign_transactions(
self.wallet.public_key, tx_recipient, tx_amount)
if self.blockchain.add_transaction(
recipient=tx_recipient,
sender=self.wallet.public_key,
signature=signature,
amount=tx_amount):
print('Added Transaction')
else:
print('Transaction Failed!')
print(self.blockchain.get_open_transactions())
elif choice == 2:
if not self.blockchain.mine_block():
print('Mining Failed...Got wallet ?')
elif choice == 3:
self.display_blockchain()
elif choice == 4:
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('All transactions are valid!')
else:
print('Invalid Tx present!')
elif choice == 5:
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif choice == 6:
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif choice == 7:
self.wallet.save_keys()
elif choice == 8:
break
else:
print('Invalid Input!')
if not Verification.verify_chain_integrity(
self.blockchain.get_chain()):
print('Block chain has been compromised .... x x x x ')
break
print(
f'Balance of {self.wallet.public_key} = {self.blockchain.get_balance():.2f}'
)
print('Done :) ')
return 0
def listen_for_input(self):
while True:
print('Please choose')
print('1: Add a new transaction')
print('2: Print blockchain')
print('3: Quit')
print('4: Verify all transaction')
print('5: Mine a new block')
print('6: Create wallet')
print('7: Load wallet')
print('8: Save wallet')
user_choice = self.get_user_choice()
if user_choice == 1:
tx_data = self.get_transaction_value()
tx_recipient, tx_amount = tx_data
signature = self.wallet.sign_transaction(
self.wallet.public_key, tx_recipient, tx_amount)
if self.blockchain.add_transaction(tx_recipient,
self.wallet.public_key,
signature,
amount=tx_amount):
print('Added transaction!')
else:
print('Transaction failed!')
print(self.blockchain.get_open_transactions())
elif user_choice == 2:
self.print_blockchain_elements()
elif user_choice == 4:
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == 3:
break
elif user_choice == 5:
if not self.blockchain.mine_block():
print("Mining failed")
elif user_choice == 6:
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == 7:
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == 8:
self.wallet.save_keys()
else:
print('Invalid choice')
if not Verification.verify_chain(self.blockchain.chain):
print('Invalid blockchain!')
break
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
print("Done!")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
self.print_options()
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount = tx_data
# Add the transaction amount to the blockchain
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_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet with valid keys?')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Option not recognised!')
if not Verification.verify_chain(self.blockchain.get_chain()):
print("***Invalid blockchain!***")
break
print(
f'{self.wallet.public_key}\'s Balance is {self.blockchain.get_balance(self.wallet.public_key):6.2f}'
)
else:
#Loop is done - didn't break
print('User Left!')
print('Done!')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("""
Please choose:
1) Add a new transaction value
2) Mine a new block
3) Output the blockchain blocks
4) Check transaction validity
5) Create wallet
6) Load keys
7) Save keys
q: Quit
""")
user_choice = self.get_user_choice()
if user_choice == '1':
recipient, amount = self.get_transaction_value()
signature = self.wallet.sign_transaction(sender=self.wallet.public_key,
recipient=recipient,
amount=amount)
if self.blockchain.add_transaction(sender=self.wallet.public_key, recipient=recipient, amount=amount, signature=signature):
print('Added transaction')
else:
print('Transaction failed')
# print(open_transactions)
elif user_choice == '2':
if not self.blockchain.mine_block():
print("Mining failed. Got no wallet?")
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print('all transaction are valid')
else:
print('there are invalid transactions')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('invalid input, choose a value from the list')
print("Balance of {}: {:6.2f}".format(self.wallet.public_key, self.blockchain.get_balance()))
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('invalid blockchain!')
break
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please choose: ")
print("1: Add a new transaction value")
print("2: Mine a new block")
print("3: Output the blockchain blocks")
print("4: Check transactions validity")
print("5: Create wallet")
print("6: Load wallet")
print("7: Save keys")
print("q: Quit")
user_choice = self.get_user_choice()
if user_choice == "1":
recipient, amount = self.get_transaction_value()
signature = self.wallet.sign_transaction(
self.wallet.public_key, recipient, amount)
if self.blockchain.add_transaction(recipient=recipient, sender=self.wallet.public_key, signature=signature, amount=amount):
print("Added transaction")
else:
print("Transaction failed")
elif user_choice == "2":
if not self.blockchain.mine_block(self.wallet.public_key):
print("Mining failed. Got not wallet?")
elif user_choice == "3":
self.print_blockchain_elements()
elif user_choice == "4":
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transactions")
elif user_choice == "5":
self.wallet.create_keys()
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_to_file()
elif user_choice == "q":
waiting_for_input = False
else:
print("Input was invalid, please pick a value from the list!")
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print("invalid blockchain")
break
print(
f"Balance of {self.wallet.public_key}: {self.blockchain.get_balance():6.2f}")
else:
print("User left")
print("Done")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose')
print('1: Add a new transaction value')
print('2: Mine block')
print('3: Output the blockchain blocks')
print('4: Check transaction validity')
print('q: quit')
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
# Unpacking the tuple
# Pulls out first el and stores in recipient then pulls second el and stores in amount
recipient, amount = tx_data
# Since sender = owner, we need to put amount = amount to skip the default for sender
if self.blockchain.add_transaction(recipient,
self.id,
amount=amount):
print('Added transaction!')
else:
print('Transaction failed!')
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
self.blockchain.mine_block()
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
# Calling the class directly with static methods
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == 'q':
waiting_for_input = False
else:
print('Invalid input. Please pick from the menu items')
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain!')
break
else:
print('Verfication Occurred')
# Using format method to output nice string
print('Balance of {}:{:6.2f}'.format(
self.id, self.blockchain.get_balance()))
else:
print('User left!')
print('Done!')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose :')
print('1: Add a new transaction value')
print('2: Mine a new block')
print('3: Output the blockchain blocks')
print('4: Check transaction validity')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount = tx_data
if self.blockchain.add_transaction(recipient,
self.id,
amount=amount):
print('Added transaction')
else:
print('Transaction failed!')
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
self.blockchain.mine_block()
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(
self.blockchain.open_transactions,
self.blockchain.get_balance):
print('----- All transactions are valid -----')
else:
print('----- There are invalid transactions -----')
elif user_choice == 'q':
waiting_for_input = False
else:
print('Invalid input')
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain!')
break
print('Balance of {} : {:6.2f}'.format(
self.id, self.blockchain.get_balance()))
print('Done !')
def listen_for_input(self):
wating_for_input = True
while wating_for_input:
print("please choose: ")
print("1: Add new transaction value")
print("2: Mine a new block")
print("3: Print the blockchain")
print("4: check transaction va lidity")
print("5: create wallet")
print("6: load wallet")
print("7: save keys")
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("Transaction added")
else:
print("Adding transation failed")
print(self.blockchain.get_open_transactions())
elif user_choice == "q":
wating_for_input = False
elif user_choice == "2":
if not self.blockchain.mine_block():
print("Mining field, Wallet is inavailable!")
elif user_choice == "3":
self.print_blockchain_elements()
elif user_choice == "4":
if Verification.verify_transactions(self.blockchain.open_transactions, self.blockchain.get_balence):
print('All Transactions are valid')
else:
print("There are invalid transaction")
elif user_choice =="5":
# saving the keys in files
self.wallet.create_keys()
# initializing the blockchian
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice =="6":
self.wallet.load_keys()
elif user_choice =="7":
self.wallet.save_to_file()
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print("invalid blockchain")
break
print(" the balance of {} is : {:6.2f}".format(
self.wallet.public_key, self.blockchain.get_balence()))
else:
print("User left !")
print('Programme terminer !')
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose')
print('1: Add new transaction value')
print('2: Mine new block')
print('3: Output the blockchain blocks')
print('4: Check transaction validity')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save keys')
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=recipient, sender=self.wallet.public_key, signature=signature, amount=amount):
print('Added transaction!')
else:
print('Transaction failed')
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet?')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print('All txs are valid')
else:
print('There are invalid txs')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Input was invalid')
print('Balance of {}: {:6.2f}'.format(self.wallet.public_key, self.blockchain.get_balance()))
if not Verification.verify_chain(self.blockchain.get_chain()):
print('Invalid blockchain')
break
def listen_to_user_input(self):
waiting_for_user_input = True
while waiting_for_user_input:
print("Make a choice")
print("1: Add new transaction value")
print("2: Mine a new block")
print("3: Outputting the blockchain blocks")
print("4: Check transactions validity")
print("5: Create wallet")
print("6: Load wallet")
print("7: Save keys")
print("Q ----> Quit")
user_choice = self.get_user_choice()
if user_choice == "1":
recipient, amount = self.get_transaction_value()
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("Transaction added successfuly!")
else:
print("Transaction failed!")
print(self.blockchain.get_open_transactions())
elif user_choice == "2":
if not self.blockchain.mine_block():
print("Mining failed. Got no wallet?")
elif user_choice == "3":
self.print_blockchain_elements()
elif user_choice == "4":
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transanction")
elif user_choice == "5":
self.wallet.create_keys()
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.lower() == 'q':
break
else:
print("Invalid input, Please enter an option from those displayed on your screen!")
if not Verification.verify_blockchain(self.blockchain.chain):
self.print_blockchain_elements()
print("Invalid blockchain!")
break
print("Balance of {}: {:6.2f}".format(self.wallet.public_key, self.blockchain.get_balance()))
print("Done!")
def mine_block(self):
""" Create a new block and adds open transactions to it. """
if self.public_key == None:
return None
last_block = self.__chain[-1]
hashed_block = hash_block_256(last_block)
node_id, proof = self.proof_of_stake()
copied_transaction = self.__transactions[:]
if not Verification.verify_transactions(copied_transaction,
self.get_balance):
return None
block = Block(len(self.__chain), node_id, proof, copied_transaction,
hashed_block)
return block
def listen_for_input(self):
while True:
user_input = self.get_user_choice()
if user_input == '1':
tx_data = self.get_transaction_value()
#unpacking tuple
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):
print('Transaction Added')
else:
print('Transaction Failed')
#print(open_transactions)
elif user_input == '2':
if not self.blockchain.mine_block():
print('No Wallet. Mining Failed')
elif user_input == '3':
self.display_blockchain()
elif user_input == '4':
if Verification.verify_chain(self.blockchain.chain):
print('\nThe Blockchain is Valid')
else:
print('\nThe Blockchain has been compromised')
break
elif user_input == '5':
if Verification.verify_transactions(
self.blockchain.get_open_transaction,
self.blockchain.get_balances):
print('Valid Transactions')
else:
print('Invalid Transactions')
elif user_input == '6':
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_input == '7':
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_input == '8':
self.wallet.save_keys()
else:
break
print('New Balance for {} : {:10.2f}'.format(
self.wallet.public_key, self.blockchain.get_balances()))
if not Verification.verify_chain(self.blockchain.chain):
print('\nThe Blockchain has been compromised')
break
def listen_for_inputs(self):
waiting_for_input = True
while waiting_for_input:
print('1: transaction')
print('2: mine block')
print('3: history')
print('4: validity')
print('5: create wallet')
print('6: load wallet')
print('7: save wallet')
print('q: exit')
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')
elif user_choice == '2':
if not self.blockchain.mine_block():
print("Mining failed")
elif user_choice == '3':
self.print_blockchain_history()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print('all true')
else:
print("invalid exist")
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print("input invalid")
if not Verification.verify_chain(self.blockchain.get_chain()):
self.print_blockchain_history()
print("invalid blockchain")
break
def listen_for_input(self):
wait_for_input = True
while wait_for_input:
print("Wybierz akcje ")
print('1 Nowa wartość transakcji \n2 Mine nowy blok \n3 Wyświetl bloki blockchaina \n4 Sprawdź ważność transakcji \n5 Stwórz portfel \n6 Wczytaj portfel \n7 Zapisz klucze\nq Aby wyjść')
user_choice = self.get_user_choice()
if user_choice == '1':
recipient, amount = self.get_transaction_val()
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('Dodano transakcje')
else:
print('Niepowodznie w dodawaniu transakcji')
# print(open_transactions)
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Niepowodzenie miningu, sprawdź czy posiadasz portfel')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print("Transakcje są poprawne")
else:
print("Transakcje błędne")
elif user_choice == '5':
self.wallet.create_keys()
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()
self.blockchain = Blockchain(self.wallet.public_key)
elif user_choice == 'q':
wait_for_input = False
else:
print('Niepoprawna cyfra ')
if not Verification.verify_chain(self.blockchain.chain):
print("Blockchain został zmanipulowany!")
break
print("Bilans konta {} : {:6.2f}".format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print("Użytkownik wyszedł")
def listening_for_input(self):
waiting_for_input = True
while waiting_for_input:
choice = self.get_user_choice()
if choice == '1':
if self.wallet.public_key==None:
print('Transaction failed!')
continue
new_recipient, new_amount = self.get_transaction_value()
signature=self.wallet.sign_transaction(self.wallet.public_key,new_recipient,new_amount)
if self.blockchain.add_transaction(new_recipient, self.wallet.public_key, signature, new_amount)!=None:
print('Added transaction!')
else:
print('Transaction failed!')
elif choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet?')
elif choice == '3':
self.print_blockchain_elements()
elif choice == '4':
if Verification.verify_transactions(self.blockchain.get_balance,self.blockchain.get_open_transactions()):
print('All transactions are valid')
else:
print('There are invalid transactions')
print(self.blockchain.get_open_transactions())
elif choice == '5':
self.wallet.create_keys()
self.blockchain=Blockchain(self.wallet.public_key)
elif choice == '6':
self.wallet.load_keys()
self.blockchain=Blockchain(self.wallet.public_key)
elif choice == 'q':
waiting_for_input = False
else:
print('Input was invalid, please pick a value from the list!')
if not Verification.verify_blockchain(self.blockchain.chain):
print('Invalid blockchain!')
break
print(f"Balance of {self.wallet.public_key}: {self.blockchain.get_balance():6.2f}")
else:
print('User left!')
print("Done!")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
user_choice = self.print_menu()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount = tx_data # tuple unpacking
if self.blockchain.add_transaction(recipient,
self.id,
amount=amount):
print('Added transaction!')
else:
print('Transaction failed')
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
self.blockchain.mine_block()
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
print('=== Transactions are all valid: ' + str(
Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance)))
elif user_choice == 'q':
waiting_for_input = False
else:
print('Input was invalid, please pick from the list')
if not Verification.verify_chain(self.blockchain.get_chain()):
print('Invalid blockchain')
waiting_for_input = False
print(f'Balance for {self.id}: {self.blockchain.get_balance()}')
else:
print('User left!')
print('Done!')
def listen_for_input(self):
quit_input = False
while quit_input is False:
print("Select option... ")
print(f'1. Add new transaction: ')
print(f'2. Mine new block')
print(f'3. Output blockchain: ')
print(f'4. Check transaction validity: ')
print(f'5. Create Wallet')
print(f'6. Load Wallet')
print(f'7. Save Keys')
print(f'q. Quit')
user_choice = self.get_user_choice()
if user_choice == "1":
print("*** Adding Transaction Start ***")
tx_data = self.get_transaction_value()
tx_recipient, tx_amount = tx_data
signature = self.wallet.sign_transaction(self.wallet.public_key, tx_recipient, tx_amount)
if self.blockchain.add_transaction(tx_recipient, self.wallet.public_key, signature, amount=tx_amount):
print("Success: add_transaction")
else:
print("Failed: add_transaction")
print(self.blockchain.get_open_transactions())
print("*** Adding Transaction End ***")
elif user_choice == "2":
print("*** Mining Block Start ***")
if not self.blockchain.mine_block(self.wallet.public_key):
print("Mining failed, You have no wallet!")
print("*** Mining Block End ***")
elif user_choice == "3":
print("*** Outputing Blockchain Start ***")
self.print_blockchain_elements()
print("*** Outputing Blockchain End ***")
elif user_choice == "4":
print("*** Verifying Blockchain Start ***")
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print("All transactions verfied")
else:
print("Invalid transactions found")
print("*** Verifying Blockchain End ***")
elif user_choice == "5":
print("*** Creating your wallet ***")
# Store in file for dev purposes
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key, self.port)
print("*** Create wallet completed ***")
elif user_choice == "6":
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key, self.port)
elif user_choice == "7":
print("*** Saving `keys ***")
self.wallet.save_keys()
print("*** Saving Keys Complete ***")
elif user_choice == "q":
quit_input = True
else:
print("Input invalid. Please choose a valid choice")
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print("Invalid Blockchain")
break
print(f'Balance for {self.wallet.public_key}: {self.blockchain.get_balance():6.2f}')
else:
print("User left")
print("Done")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please choose")
print("1. Add a new transaction 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 Keys")
print("q. Exit")
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=recipient,
sender=self.wallet.public_key,
signature=signature,
amount=amount):
print("Added transaction!!")
else:
print("Transaction failed!!")
print(self.blockchain.get_open_transactions())
elif user_choice == "2":
if not self.blockchain.mine_block():
print("Mining failed. Got no wallet?")
elif user_choice == "3":
self.print_blockchain_elements()
elif user_choice == "4":
if Verification.verify_transactions(
self.blockchain.get_open_transactions(),
self.blockchain.get_balance):
print("All transactions are valid")
else:
print("There are invalid transactions")
elif user_choice == "5":
self.wallet.create_keys()
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":
waiting_for_input = False
else:
print("Invalid Choice, please try again")
if not Verification.verify_chain(self.blockchain.chain):
print("Invalid blockchain")
break
print("-" * 30)
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
print("-" * 30)
else:
print("goodbye")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('Please choose')
print('1: Add a new transaction 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 keys')
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.open_transactions)
elif user_choice == '2':
if not self.blockchain.mine_block():
print('Mining failed.')
elif user_choice == '3':
self.print_blockchain_elements()
elif user_choice == '4':
verifier = Verification()
if verifier.verify_transactions(
self.blockchain.open_transactions,
self.blockchain.get_balance):
print('All transactions are valid')
else:
print('There are invalid transactions')
elif user_choice == '5':
self.wallet.create_keys()
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':
waiting_for_input = False
else:
print('Invalid choice')
# Verification.verify_chain() works here despite not instantiating that class because verify_chain is a @staticmethod
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('Invalid blockchain')
break
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print('User left!')
print('Done')
def listen_to_input(self):
while True:
print('Choose:')
print('1: Add value to the blockchain')
print('2 : Mine Block')
print('3: print the blocks')
print('4: Create wallet')
print('5: load Wallet')
print('6: check transaction validity on open transaction')
print('7: save wallet')
print('q: Quit')
choice = self.get_choice()
if 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('transaction added!!')
else:
print('transaction failed!')
print(self.blockchain.get_open_transaction)
elif choice == '2':
if not self.blockchain.mine_block():
print('Mining failed. Got no wallet')
# print(blockchain)
elif choice == '3':
self.print_blocks()
elif choice == '4':
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif choice == '5':
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key)
elif choice == '6':
if Verification.verify_transactions(
self.blockchain.get_open_transaction(),
self.blockchain.get_balance):
print('transactions are valid')
else:
print('transactions are not valid')
elif choice == '7':
self.wallet.save_keys()
elif choice == 'q':
break
else:
print('input was invalid, check from the list')
if not Verification.block_verify(self.blockchain.chain):
print('invalid chain')
break
print('Balance of {} is : {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
else:
print('user left')
print("done")
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print('1: Add new transaction value')
print('2: Mine new block')
print('3: Output blockchain blocks')
print('4: Check transaction validity')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save keys')
print('q: Quit')
user_choice = self.get_user_choice().lower()
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('-' * 20)
print('\n*** Success. Transaction added. ***\n')
print('-' * 20)
else:
print('-' * 20)
print('\n*** Insuficient funds. Transaction failed. ***\n')
print('-' * 20)
print(self.blockchain.get_open_transactions())
elif user_choice == '2':
if not self.blockchain.mine_block():
print('-' * 20)
print('Mining failed! Do you have a wallet?')
print('-' * 20)
elif user_choice == '3':
print('>' * 20)
self.print_blockchain_elements()
print('>' * 20)
elif user_choice == '4':
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balance):
print('-' * 20)
print('All transactions are valid.')
print('-' * 20)
elif user_choice == '5':
# self.wallet = Wallet()
self.wallet.create_keys()
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':
print('-' * 20)
print('Goodbye')
print('-' * 20)
waiting_for_input = False
else:
print('-' * 20)
print(' \n*** Invalid input. Try again. ***\n')
print('-' * 20)
if not Verification.verify_chain(self.blockchain.chain):
self.print_blockchain_elements()
print('^' * 20)
print('\n*** Error. Invalid blockchain. ***\n')
print('^' * 20)
break
print('<' * 20)
print('Balance of {}: {:6.2f}'.format(
self.wallet.public_key, self.blockchain.get_balance()))
print('<' * 20)
def listen_for_input(self):
"""Starts the node and waits for user input."""
waiting_for_input = True
# A while loop for the user input interface
# It's a loop that exits once waiting_for_input becomes False or when break is called
while waiting_for_input:
print("Please enter your choice")
print("1: Add a new transaction value")
print("2: Mine Block")
print("3: Output the blockchain blocks")
print("4: Check transaction validity")
print("5: Create Wallet")
print("6: Load Wallet")
print("7: Save keys")
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)
# Add the transaction amount to the blockchain
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_transactions())
elif user_choice == "2":
if not self.blockchain.mine_block():
print("Mining Failed. Got no Wallet?")
elif user_choice == "3":
self.print_blockchain_blocks()
elif user_choice == "4":
# verifier = Verification()
if Verification.verify_transactions(self.blockchain.get_open_transactions(), self.blockchain.get_balances):
print("All transactions are valid!")
else:
print("There are some transactions failed!")
elif user_choice == "5":
self.wallet.create_keys()
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":
# This will lead to the loop to exist because it's running condition becomes False
waiting_for_input = False
else:
print("Input is invalid, please pick a value from a list.")
# verifier = Verification()
if not Verification.verify_chain(self.blockchain.get_chain()):
self.print_blockchain_blocks()
print("Invalid Blockchain!")
# Break out of the loop
break
print("Balance of {}: {:6.2f}".format(self.wallet.public_key, self.blockchain.get_balances()))
else:
print("User Left!")
print ("Done!")
