def load_data(self):
try:
with open('blockchain-{}.txt'.format(self.node_id),mode='r') as f:
file_content = f.readlines()
blockchain = json.loads(file_content[0][:-1])
updated_blockchain = []
for block in blockchain:
converted_tx = [Transaction(
tx['sender'],tx['recipient'],tx['signature'],tx['amount']) for tx in block['transactions']]
updated_block = Block(block['index'], block['previous_hash'],converted_tx,block['proof'],block['timestamp'])
updated_blockchain.append(updated_block)
self.chain = updated_blockchain
open_transactions = json.loads(file_content[1][:-1])
updated_transactions = []
for tx in open_transactions:
updated_transactions = Transaction(tx['sender'],tx['receipient'],tx['signature'],tx['amount'])
updated_transactions.append(updated_transaction)
self.__open_transactions = updated_transactions
peer_nodes = json.loads(file_content[2])
self.__peer_nodes = set(peer_nodes)
except (IOError,IndexError):
print('Handled Exception.......')
except ValueError:
print("Value error")
except:
print('Thrown Wildcard while loading data')
finally:
print('Cleanup')
def load_data():
global blockchain
global open_transactions
try:
with open('blockchain.txt', mode='r') as f:
file_content = f.readlines()
blockchain = json.loads(file_content[0][:-1])
updated_blockchain = []
for block in blockchain:
converted_tx = [
Transaction(tx['sender'], tx['recipient', tx['amount']])
for tx in block['transactions']
]
updated_block = Block(block['index'], block['previous_hash'],
converted_tx, block['proof'],
block['timestamp'])
updated_blockchain.append(updated_block)
blockchain = updated_blockchain
open_transactions = json.loads(file_content[1])
updated_transactions = []
for tx in open_transactions:
updated_transactions = Transaction(tx['sender'],
tx['recipient'],
tx['amount'])
updated_transactions.append(updated_transactions)
open_transactions = updated_transactions
except (IOError, IndexError):
# Our starting block for the blockchain
genesis_block = Block(0, '', [], 100, 0)
# Initializing our (empty) blockchain list
blockchain = [genesis_block]
# Unhandled transactions
open_transactions = []
