def receive_tx():
print(request.form)
tx_data = request.json
tx = Transaction.from_json(tx_data)
if tx.verify():
mempool.push_transaction(tx)
return jsonify('received')
else:
raise NotImplementedError("Not sure what to do if tx is not valid")
def from_json(cls, json_data):
try:
decoded = json.loads(json_data)
except Exception as e:
print(e)
try:
decoded_trans = json.loads(decoded['transactions'])
transactions = []
for k in decoded_trans:
transactions += [Transaction.from_json(decoded_trans[k])]
return cls(decoded['index'], decoded['prev_hash'],
None, transactions, decoded['root'],
decoded['timestamp'], decoded['nonce'])
except KeyError as ke:
print(ke)
def read_json(filename): # function that opens and reads a json file
with open(filename, "r") as file:
if file.mode == "r": # checks that file is open in read mode
content = read_open_file(filename, file)
rows = re.findall(
r"""".+": "(\d{4}-\d{2}-\d{2})",\n {4}".+": "(.+ ?.*)",\n {4}".+": "(.+ ?.*)",\n {4}".+": "(.+ ?.*)",\n {4}".+": (\d+.?\d*)""",
content) # regex search that groups data from each column
transactions = []
for json_transaction in rows:
transactions.append(Transaction.from_json(
json_transaction)) # formats data into standard internal
# transaction class format
logging.info(filename + " has been read and closed.")
return transactions
def put_transaction(self, transaction):
# create a Transaction object from the json data, it also validates it
t = Transaction.from_json(transaction)
if not self.miner.t_already_there(t):
self.upcoming_transactions.append(t)
return (True, 'Transaction added')
