I am working on a python django project where users send bitcoins to external addresses. this is how the payment module looks like. I have tried many suggestions posted here with little help.
Below is my code. I would appreciate any third eye who could help me troubleshot this error.
import decimal as Decimal
import bitcoinrpc
class Withdrawal(models.Model):
amount = models.OneToOneField("Amount", null=True)
payment = models.OneToOneField(Payment, null=True, blank=True)
to = models.CharField(max_length=35, null=True, blank=True)
account = models.ForeignKey(Account)
complete = models.BooleanField(default=False)
txid = models.CharField(max_length=64, blank=True, null=True)
def __str__(self):
return u"{} from {} to {}".format(self.amount, self.account, self.to)
def alert(self):
"""Sends email to all staff users about failed withdrawal"""
for u in User.objects.filter(is_superuser=True):
if u.email != u'':
message = "Withdrawal {}, by {}, for {} " \
"has failed due to an insufficient balance."
message = message.format(self.pk,
self.account.user.email,
self.amount)
send_mail('FAILED WITHDRAWAL',
message,
settings.DEFAULT_FROM_EMAIL,
[u.email],
fail_silently=False)
raise Exception("Insufficient funds")
def send(self):
"""Sends payment on the blockchain, or if unable calls self.alert"""
if self.complete:
raise Exception("Sorry, Can't send a completed payment")
s = get_server()
fee = Decimal(str(PAYMENTS_FEE))
final_amount = self.amount.base_amt - fee
inputs = s.proxy.listunspent(0,
9999999)
total = sum([t['amount'] for t in inputs])
if total 0:
outputs[get_change()] = Decimal(total) -final_amount - fee
raw = s.createrawtransaction(inputs, outputs)
s.walletpassphrase(PAYMENTS_PASSPHRASE, 10)
signed = s.signrawtransaction(raw)
sent = s.proxy.sendrawtransaction(signed['hex'])
s.walletlock()
self.complete = True
self.txid = sent
self.save()
if self.payment:
self.payment.txid = sent
self.confirmed = True
self.payment.save()
print sent
@staticmethod
def process_payments():
"""Try to send all present payments"""
for w in Withdrawal.objects.filter(complete=False):
w.send()
When this code is executed,an error occurs. This is the traceback
Traceback (most recent call last):
File "/home/mart/forexapp/manage.py", line 10, in
execute_from_command_line(sys.argv)
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 351, in execute_from_command_line
utility.execute()
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 343, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 394, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 445, in execute
output = self.handle(*args, **options)
File "/home/mart/forexapp/payments/management/commands/process_payments.py", line 6, in handle
Withdrawal.process_payments()
File "/home/mart/forexapp/payments/models.py", line 35, in process_payments
w.send()
File "/home/mart/forexapp/payments/models.py", line 23, in send
raw = s.createrawtransaction(inputs, outputs)
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/bitcoinrpc/connection.py", line 357, in createrawtransaction
return self.proxy.createrawtransaction(inputs, outputs)
File "/home/mart/forexapp/venv/local/lib/python2.7/site-packages/bitcoinrpc/proxy.py", line 91, in __call__
'id': self.__idcnt})
File "/usr/lib/python2.7/json/__init__.py", line 244, in dumps
return _default_encoder.encode(obj)
File "/usr/lib/python2.7/json/encoder.py", line 207, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python2.7/json/encoder.py", line 270, in iterencode
return _iterencode(o, 0)
File "/usr/lib/python2.7/json/encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: Decimal('0.0016512') is not JSON serializable
Anything wrong i'm doing here?
