def blockchain():
blocks_dict = {}
files = int_and_sort(os.listdir(blockchain_dir))
for filename in reversed(files[1:]):
block = json.load(open(blockchain_dir + str(filename), 'rb'))
blocks_dict[filename] = block
return render_template('blockchain.html', blocks=blocks_dict)
def edit(num):
block_number = num
files = int_and_sort(os.listdir(blockchain_dir))
last_file = files[-1]
blockchain_filename = blockchain_dir + str(num)
block = json.load(open(blockchain_filename, 'rb'))
if request.method == 'GET':
return render_template('edit.html', block=block, number=num, last_file=last_file)
else:
if block_number == last_file:
nodes_numbers = []
for i in range(1, 7):
nodes_numbers.append(request.form.get(f'node{i}'))
if nodes_numbers.count(None) < 3:
from_who = request.form['from']
to_whom = request.form['to']
amount = request.form['amount']
new_hash = request.form['hash']
change_block(block_number, from_who,
to_whom, amount, new_hash)
return render_template('edit.html', edited='BLOCK IS CHANGED!', number=num, block=block, last_file=last_file)
else:
return render_template('edit.html', deny='YOU CANT CHANGE THIS BLOG WITHOUT ACCESS TO ENOUGH NUMBER OF NODES!', number=num, block=block, last_file=last_file)
else:
from_who = request.form['from']
to_whom = request.form['to']
amount = request.form['amount']
new_hash = request.form['hash']
change_block(block_number, from_who, to_whom, amount, new_hash)
return render_template('edit.html', edited='You have changed the block!', number=num, block=block)
def node(i):
n = i
if n in range(1, len(node_dirs()) + 1):
node = nodes_route + str(n) + '/'
files = int_and_sort(os.listdir(node))
blocks_dict = {}
for filename in reversed(files[1:]):
block = json.load(open(node + str(filename), 'rb'))
blocks_dict[filename] = block
return render_template('node.html', blocks=blocks_dict, number=n)
def check_integrity():
# get hash of the previous block
# again count its hash
# compare results
blocks_dict = {}
results = []
files = int_and_sort(os.listdir(blockchain_dir))
for filename in reversed(files[1:]):
block = json.load(open(blockchain_dir + str(filename), 'rb'))
blocks_dict[filename] = block
file_hash = block['hash']
prev_file = str(filename - 1)
actual_hash = get_hash(prev_file)
if file_hash == actual_hash:
result = 'ok'
else:
result = 'corrupted'
results.append({prev_file: result})
return render_template('integrity.html', results=results)
def edit(num):
files = int_and_sort(os.listdir(blockchain_dir))
last_file = files[-1]
block = json.load(open(filename, 'rb'))
if request.method == 'GET':
return render_template('edit.html',
block=block,
number=num,
last_file=last_file)
else:
from_who = request.form['from']
to_whom = request.form['to']
amount = request.form['amount']
new_hash = request.form['hash']
change_block(filename, from_who, to_whom, amount, new_hash)
return render_template('edit.html',
edited='BLOCK IS CHANGED!',
number=num,
block=block,
last_file=last_file)
def edit(num):
files = int_and_sort(os.listdir(blockchain_dir))
last_file = files[-1]
filename = blockchain_dir + str(num)
