def post_transaction(self, json):
t = Transaction.fromJson(json)
if t is None:
debug('JSON error')
self.no_response(400) # Bad Request
elif not t.is_valid(self.server.blockchain):
debug('invalid blockchain transaction')
self.no_response(400) # Bad Request
else:
self.server.transactions.append(t)
self.no_response(200) # OK
self.broadcast_transaction(t)
def fromJson(json_data):
try:
data = json.loads(json_data)
b = Block(data["previous_hash"], data["miner_address"])
ts = []
for t in data["transactions"]:
ts.append(Transaction.fromJson(t))
b.set_transactions(ts)
b.set_proof(data["proof"])
return b
# JSON ValueError for decode
# KeyError if no accessed key
except (ValueError, KeyError, TypeError):
return None
def get_transactions(self):
"""send GET request to relay/transactions/ and parse it
"""
r = get_request(self.url+'transactions/')
if r is None:
return None
if not r.status_code == 200:
return None
try:
json_ts = r.json()
except ValueError:
return None
ts = []
for json in json_ts:
t = Transaction.fromJson(json)
if not t is None:
ts.append(t)
return ts
