def load_keys():
if wallet.load_keys():
global blockchain
blockchain = BlockChain(wallet.public_key, port)
response = {'public_key': wallet.public_key, 'private_key': wallet.private_key,
'funds': blockchain.get_balance()}
return jsonify(response), 201
else:
response = {'message': 'Loading keys failed'}
return jsonify(response), 500
def create_keys():
wallet.create_keys()
if wallet.save_keys():
global blockchain
blockchain = BlockChain(wallet.public_key)
response = {
'public_key': wallet.public_key,
'private_key': wallet.private_key,
'funds': blockchain.get_balance(),
}
return jsonify(response), 201
else:
response = {'message': 'Saving the keys failed.'}
return jsonify(response), 500
def load_wallet():
if wallet.load_keys():
global blockchain
blockchain = BlockChain(wallet.public_key, port)
blockchain.load_data()
response = {
"public_key": wallet.public_key,
"private_key": wallet.private_key,
"Balance : ": blockchain.get_balance(wallet.public_key)
}
return jsonify(response), 201
else:
response = {"message": "Loading keys failed."}
return jsonify(response), 500
def create_wallet():
wallet.create_keys()
if wallet.save_keys():
global blockchain
blockchain = BlockChain(wallet.public_key, port)
# By default will load previous blockchain data
# May be set to adjustable on UI
blockchain.load_data()
response = {
"public_key": wallet.public_key,
"private_key": wallet.private_key,
"Balance : ": blockchain.get_balance(wallet.public_key)
}
return jsonify(response), 201
else:
response = {"message": "Saving keys failed."}
return jsonify(response), 500
def load_keys():
"""
This GET function loads the keys of a wallet via the '/wallet' route.
:var blockchain BlockChain: The blockchain of the wallet (or of the node).
:var response dict: Contains a failure message if the keys are not loaded. Contains the public key, private key and the funds of the wallet if the keys are saved successfully.
:returns json: A JSON response of 500 if the keys failed loading, 201 if it succeeds plus the public key, the private key and the funds.
"""
if wallet.load_keys():
# TODO: why using a global variable?
global blockchain # We must define a global variable blockchain because
blockchain = BlockChain(wallet.public_key, port)
response = {
'public_key': wallet.public_key,
'private_key': wallet.private_key,
'funds': blockchain.get_balance()
}
return jsonify(response), 201
else:
response = {'message': 'Loading the keys failed'}
return jsonify(response), 500
def create_keys():
"""
This POST function creates the keys for the wallet via the '/wallet' route.
:var blockchain BlockChain: Blockchain associated with the wallet (or the node).
:var response dict: Contains a failure message if the keys are not saved. Contains the public key, private key and the funds of the wallet if the keys are saved successfully.
:returns json: A JSON response of 500 if there is an error in the key creation, 201 if it succeeds plus the public and private key.
"""
wallet.create_keys()
if wallet.save_keys():
# TODO: why using a global variable?
global blockchain # We must define a global variable blockchain because
blockchain = BlockChain(wallet.public_key, port)
response = {
'public_key': wallet.public_key,
'private_key': wallet.private_key,
'funds': blockchain.get_balance()
}
return jsonify(response), 201
else:
response = {'message': 'Saving the keys failed'}
return jsonify(response), 500
class Node:
def __init__(self):
self.wallet = Wallet()
# By default the node generate a new wallet while the user
# can still generate a new WALLET
self.wallet.create_keys()
self.blockchain = BlockChain(self.wallet.public_key)
#self.blockchain = None
def get_transaction_value(self):
#tx_sender = input("Enter the sender of the transaction:")
tx_sender = self.wallet.public_key
tx_recipient = input("Enter the recipient of the transaction:")
tx_amount = float(input("Enter the amount of the transaction:"))
return tx_sender, tx_recipient, tx_amount
def print_blockchain_elements(self):
for block in self.blockchain.get_chain():
print(block)
else:
print("-" * 30)
def get_user_choice(self):
return int(input("Your choice:"))
def display_balance_all(self):
for person in self.blockchain.participants:
print("Balance of {} : {:6.2f}".format(
person, self.blockchain.get_balance(person)))
def listen_for_input(self):
waiting_for_input = True
while waiting_for_input:
print("Please select your choice: ")
print("1) Add a a new transaction. ")
print("2) Mine a new block")
print("3) Print the blockchain. ")
print("4) Show participants. ")
print("5) Manipulate. ")
print("6) Verify. ")
print("7) Quit. ")
print("8) Load Data.")
print("9) Create Wallet")
print("10) Load Wallet")
print("11) Save Keys")
user_choice = self.get_user_choice()
if user_choice == 1:
tx_sender, tx_recipient, tx_amount = self.get_transaction_value(
)
signature = self.wallet.sign_transaction(
tx_sender, tx_recipient, tx_amount)
if self.blockchain.add_transaction(tx_sender, tx_recipient,
self.wallet.public_key,
signature, tx_amount):
print("Transaction successfully added.")
else:
print("Transaction failed.")
print([
tx.__dict__
for tx in self.blockchain.get_open_transactions()
])
elif user_choice == 2:
if self.blockchain.mine_block():
print(" New Block Mined!")
elif user_choice == 3:
self.print_blockchain_elements()
elif user_choice == 4:
print(self.blockchain.participants)
elif user_choice == 5:
print("NONE")
elif user_choice == 6:
print(Verification.verify_chain(self.blockchain.get_chain()))
elif user_choice == 7:
waiting_for_input = False
elif user_choice == 8:
self.blockchain.load_data()
elif user_choice == 9: # Create Wallet
self.wallet.create_keys()
self.blockchain = BlockChain(self.wallet.public_key)
print(self.wallet.public_key)
elif user_choice == 10: # Load Wallet
self.wallet.load_keys()
self.blockchain = BlockChain(self.wallet.public_key)
print(self.wallet.public_key)
elif user_choice == 11: # Save the keys
if self.wallet.save_keys():
print("Keys SAVED.")
else:
print("Keys NOT saved.")
else:
print("Not a valid input.")
if not Verification.verify_chain(self.blockchain.get_chain()):
print("Invalid blockchain")
self.print_blockchain_elements()
waiting_for_input = False
self.display_balance_all()
else:
print("User left.")
