class Node:
"""The node which runs the local blockchain instance.
Attributes:
:id: The id of the node.
:blockchain: The blockchain which is run by this node.
"""
def __init__(self):
# self.id = str(uuid4())
self.wallet = Wallet("node")
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key, "node")
def get_transaction_value(self):
""" Returns the input of the user (a new transaction amount) as a float. """
# Get the user input, transform it from a string to a float and store it in user_input
tx_recipient = input('Enter the recipient of the transaction: ')
tx_amount = float(input('Your transaction amount please: '))
tx_spread = float(input('Your transaction spread please: '))
return tx_recipient, tx_amount, tx_spread
def get_pubkey(self):
""" Returns the pubkey that is supposed to be the private account. """
# Get the user input, transform it from a string to a float and store it in user_input
tx_recipient = input('Enter the Pubkey: ')
spread_amount = float(input('Your transaction spread please: '))
return tx_recipient, spread_amount
def get_tagsaction_value(self):
""" Returns the input of the user (a new tagsaction tag)"""
# Get the user input, transform it from a string to a float and store it in user_input
tag = input('Enter any type of tag: ')
tag_amount = float(input('Your transaction spread please: '))
return tag, tag_amount
def get_messsactions_value(self):
""" Returns the input of the user (a new message)"""
# Get the user input, transform it from a string to a float and store it in user_input
tag = input('Enter any type of tag: ')
message = input('Enter any type of message: ')
spend_amount = float(input('Your transaction amount please: '))
spread_amount = float(input('Your transaction spread please: '))
return tag, message, spend_amount, spread_amount
def get_user_choice(self):
"""Prompts the user for its choice and return it."""
user_input = input('Your choice: ')
return user_input
def print_blockchain_elements(self):
""" Output all blocks of the blockchain. """
# Output the blockchain list to the console
for block in self.blockchain.chain:
print('Outputting Block')
print(block)
else:
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 choose')
print('1: Add a new transaction value')
print('2: Mine a new block')
print('3: Output the blockchain blocks')
print('4: check the transaction validity')
print('5: Create wallet')
print('6: Load wallet')
print('7: Save keys')
print('8: Send messages')
print('9: Create a tag')
print('d: Create a private account')
print('f: メッセージの表示')
print('q: Quit')
user_choice = self.get_user_choice()
if user_choice == '1':
tx_data = self.get_transaction_value()
recipient, amount, spread = tx_data
# Add the transaction amount to the blockchain
signature = self.wallet.sign_transaction(
self.wallet.public_key, recipient, amount, spread)
if self.blockchain.add_transaction(self.wallet.public_key,
recipient, signature,
amount, spread):
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':
self.blockchain.check()
elif user_choice == '5':
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key, "node")
elif user_choice == '6':
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key, "node")
elif user_choice == '7':
self.wallet.save_keys()
elif user_choice == '8':
info = self.get_messsactions_value()
hashtg, message, amount, spread = info
self.blockchain.get_tag_holders(hashtg)
recipient = len(self.blockchain.open_recipients)
signature = self.wallet.sign_messsaction(
self.wallet.public_key, recipient, message, hashtg, amount,
spread)
if self.blockchain.add_messsaction(self.wallet.public_key,
recipient, signature,
message, hashtg, amount,
spread):
print('Added transaction!')
else:
print('Transaction failed!')
elif user_choice == '9':
print(self.blockchain.show_tag())
tag_data = self.get_tagsaction_value()
tag, spread = tag_data
# Add the tagsaction amount to the blockchain
signature = self.wallet.sign_tagsaction(
self.wallet.public_key, tag, spread)
if self.blockchain.add_tagsaction(self.wallet.public_key,
signature, tag, spread):
print('Added transaction!')
else:
print('Transaction failed!')
elif user_choice == 'd':
tag_data = self.get_pubkey()
pubkey, spread = tag_data
signature = self.wallet.sign_account(self.wallet.public_key,
pubkey, spread)
if self.blockchain.add_account(self.wallet.public_key, pubkey,
signature, spread):
print('Added transaction!')
else:
print('Transaction failed!')
elif user_choice == 'f':
print(self.blockchain.recieve_message)
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!')
