async def post(self):
config = self.config
mongo = self.config.mongo
body = json.loads(self.request.body.decode('utf-8'))
try:
fg = FastGraph.from_dict(0, body.get('txn'), raw=True)
fg.verify()
except:
raise
return 'invalid transaction', 400
res = mongo.db.signed_transactions.find_one({'hash': body.get('hash')})
if res:
return 'no', 400
try:
rid = TU.generate_rid(config, body.get('bulletin_secret'))
my_entry_for_relationship = GU().get_transaction_by_rid(
rid,
config.wif,
rid=True,
my=True,
public_key=config.public_key)
their_entry_for_relationship = GU().get_transaction_by_rid(
rid,
rid=True,
raw=True,
theirs=True,
public_key=config.public_key)
verified = verify_signature(
base64.b64decode(body.get('bulletin_secret')),
my_entry_for_relationship['relationship']
['their_username'].encode(),
bytes.fromhex(their_entry_for_relationship['public_key']))
if not verified:
return 'no', 400
verified = verify_signature(
base64.b64decode(body.get('id')),
body.get('hash').encode('utf-8'),
bytes.fromhex(their_entry_for_relationship['public_key']))
address = str(
P2PKHBitcoinAddress.from_pubkey(
bytes.fromhex(their_entry_for_relationship['public_key'])))
found = False
for x in BU().get_wallet_unspent_transactions(
address, [body.get('input')]):
if body.get('input') == x['id']:
found = True
if not found:
for x in BU().get_wallet_unspent_fastgraph_transactions(
address):
if body.get('input') == x['id']:
found = True
if found:
signature = mongo.db.signed_transactions.find_one({
'input':
body.get('input'),
'txn.public_key':
body['txn']['public_key']
})
if signature:
already_spent = mongo.db.fastgraph_transactions.find_one({
'txn.inputs.id':
body['input'],
'txn.public_key':
body['txn']['public_key']
})
if already_spent:
self.set_status(400)
self.write('already spent!')
self.finish()
return True
else:
signature['txn']['signatures'] = [
signature['signature']
]
fastgraph = FastGraph.from_dict(0, signature['txn'])
try:
fastgraph.verify()
except Exception as e:
raise
return 'did not verify', 400
result = mongo.db.fastgraph_transactions.find_one(
{'txn.hash': fastgraph.hash})
if result:
return 'duplicate transaction found', 400
spent_check = mongo.db.fastgraph_transactions.find_one(
{
'txn.inputs.id': {
'$in': [x.id for x in fastgraph.inputs]
}
})
if spent_check:
return 'already spent input', 400
fastgraph.save()
else:
return 'no transactions with this input found', 400
if verified:
transaction_signature = TU.generate_signature_with_private_key(
config.private_key, body.get('hash'))
signature = {
'signature': transaction_signature,
'hash': body.get('hash'),
'bulletin_secret': body.get('bulletin_secret'),
'input': body.get('input'),
'id': body.get('id'),
'txn': body.get('txn')
}
mongo.db.signed_transactions.insert(signature)
if '_id' in signature:
del signature['_id']
self.render_as_json(signature, indent=4)
else:
return 'no', 400
except Exception as e:
raise
self.render_as_json({'status': 'error', 'msg': e})
def __init__(
self,
block_height,
bulletin_secret='',
username='',
value=0,
fee=0.0,
requester_rid='',
requested_rid='',
public_key='',
dh_public_key='',
private_key='',
dh_private_key='',
to='',
inputs='',
outputs='',
coinbase=False,
chattext=None,
signin=None,
no_relationship=False
):
self.config = get_config()
self.mongo = self.config.mongo
self.app_log = getLogger('tornado.application')
self.block_height = block_height
self.bulletin_secret = bulletin_secret
self.username = username
self.requester_rid = requester_rid
self.requested_rid = requested_rid
self.public_key = public_key
self.dh_public_key = dh_public_key
self.private_key = private_key
self.value = value
self.fee = float(fee)
self.dh_private_key = dh_private_key
self.to = to
self.time = str(int(time.time()))
self.outputs = []
self.no_relationship = no_relationship
for x in outputs:
self.outputs.append(Output.from_dict(x))
self.inputs = []
for x in inputs:
if 'signature' in x and 'public_key' in x and 'address' in x:
self.inputs.append(ExternalInput.from_dict(x))
else:
self.inputs.append(Input.from_dict(x))
self.coinbase = coinbase
self.chattext = chattext
self.signin = signin
self.do_money()
inputs_concat = self.get_input_hashes()
outputs_concat = self.get_output_hashes()
if bulletin_secret:
self.rid = self.generate_rid()
if self.chattext:
self.relationship = json.dumps({
"chatText": self.chattext
})
self.cipher = Crypt(self.config.wif)
self.encrypted_relationship = self.cipher.encrypt(self.relationship)
elif self.signin:
for shared_secret in TU.get_shared_secrets_by_rid(self.rid):
self.relationship = SignIn(self.signin)
self.cipher = Crypt(shared_secret.hex(), shared=True)
self.encrypted_relationship = self.cipher.shared_encrypt(self.relationship.to_json())
break
elif self.no_relationship:
self.encrypted_relationship = ''
else:
if not self.dh_public_key or not self.dh_private_key:
a = os.urandom(32).decode('latin1')
self.dh_public_key = scalarmult_base(a).encode('latin1').hex()
self.dh_private_key = a.encode().hex()
self.relationship = self.generate_relationship()
if not private_key:
raise Exception('missing private key')
self.cipher = Crypt(self.config.wif)
self.encrypted_relationship = self.cipher.encrypt(self.relationship.to_json())
else:
self.rid = ''
self.encrypted_relationship = ''
self.header = (
self.public_key +
self.time +
self.dh_public_key +
self.rid +
self.encrypted_relationship +
"{0:.8f}".format(self.fee) +
self.requester_rid +
self.requested_rid +
inputs_concat +
outputs_concat
)
self.hash = hashlib.sha256(self.header.encode('utf-8')).digest().hex()
if self.private_key:
self.transaction_signature = TU.generate_signature_with_private_key(private_key, self.hash)
else:
self.transaction_signature = ''
self.transaction = self.generate_transaction()