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Copy pathOLD_node.py
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132 lines (111 loc) · 5.12 KB
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'''
I rather doubt that this code will work thsi is the code ehich is generated when we
didn't had ui and we need to maintain the blockchain from the console
now after updating the defination of the wallet we cant run it fromm the console
the whole work which this file did is done by the ui file and new node file
use case = "Average use"
made: 19/5
no_of updated = 88
last_update: 1/6
'''
from uuid import uuid4
from blockchain import Blockchain
from utility.verification import Verification
from wallet import Wallet
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, node_id):
# self.id = str(uuid4())
self.node_id = node_id
self.wallet = Wallet(node_id)
self.wallet.create_keys()
self.blockchain = Blockchain(self.wallet.public_key, node_id)
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: '))
return tx_recipient, tx_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)
#this is the user interface which is made in the initial time of the program
#now after making the userinterface we dont need them to work but now we are
#initializing all of the functions here only
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, self.node_id)
elif user_choice == '6':
self.wallet.load_keys()
self.blockchain = Blockchain(self.wallet.public_key,self.node_id)
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!')
#here we are checking the context of the execuition if we had run this file rhen and
#only then these two lines are going to be execuited
#if the node fie is importes anywhere then this is not going to be executed
if __name__ == '__main__':
node = Node(5000)
node.listen_for_input()