def unpack_and_mint(self, msg):
"""unpacks the request retreiving the number of coins packed and the total value desired.
Verification: values must be positive!
"""
self.number, msg = Basic.read_short(msg)
value, msg = Basic.read_int(msg)
log_msg('REQUEST:: %s %s'%(self.number, self.hexId), 0)
if not BankUtil.is_positive_integer(self.number):
raise ValueError('number of coins must be greater than 0!')
if value != ACOIN_VALUE or not BankUtil.is_positive_integer(value):
raise ValueError('coins must have a positive, integer value')
self.bill = 0
self.signatures = ""
for i in range(0, self.number):
#TODO: move to a worker pool or something
sig = Globals.ACOIN_KEY.decrypt(msg[:Globals.ACOIN_KEY_BYTES], False)
self.signatures += struct.pack('!%ss'%(Globals.ACOIN_KEY_BYTES), sig)
msg = msg[Globals.ACOIN_KEY_BYTES:]
self.bill += value
#TODO: move this constraint to postgres to get rid of any potential race conditions
sql = "SELECT balance FROM Accounts WHERE Username = %s"
inj = (self.user,)
d = db.read(sql, inj)
return d
def unpack_and_mint(self, msg):
"""unpacks the request retreiving the number of coins packed and the total value desired.
Verification: values must be positive!
"""
self.number, msg = Basic.read_short(msg)
value, msg = Basic.read_int(msg)
log_msg('REQUEST:: %s %s' % (self.number, self.hexId), 0)
if not BankUtil.is_positive_integer(self.number):
raise ValueError('number of coins must be greater than 0!')
if value != ACOIN_VALUE or not BankUtil.is_positive_integer(value):
raise ValueError('coins must have a positive, integer value')
self.bill = 0
self.signatures = ""
for i in range(0, self.number):
#TODO: move to a worker pool or something
sig = Globals.ACOIN_KEY.decrypt(msg[:Globals.ACOIN_KEY_BYTES],
False)
self.signatures += struct.pack('!%ss' % (Globals.ACOIN_KEY_BYTES),
sig)
msg = msg[Globals.ACOIN_KEY_BYTES:]
self.bill += value
#TODO: move this constraint to postgres to get rid of any potential race conditions
sql = "SELECT balance FROM Accounts WHERE Username = %s"
inj = (self.user, )
d = db.read(sql, inj)
return d
def unpack_and_verify(self, blob):
"""verifies that...
1. the coin is valid
2. isn't expired
3. hasn't been deposited before
returns one of 4 statements"""
self.number, blob = Basic.read_short(blob)
log_msg('DEPOSIT:: %s %s'%(self.number, self.hexId), 0)
total = 0
self.returnSlip = ""
if BankUtil.is_positive_integer(self.number):
#we don't want the interval to roll over half way through a request
current = Globals.CURRENT_ACOIN_INTERVAL[0]
for i in range(self.number):
result, coin, blob = deposit_acoin(blob, current)
self.returnSlip += result
if result == '0':
total += ACoin.VALUE
self.amountEarned = total
return total
def unpack_and_verify(self, blob):
"""verifies that...
1. the coin is valid
2. isn't expired
3. hasn't been deposited before
returns one of 4 statements"""
self.number, blob = Basic.read_short(blob)
log_msg('DEPOSIT:: %s %s' % (self.number, self.hexId), 0)
total = 0
self.returnSlip = ""
if BankUtil.is_positive_integer(self.number):
#we don't want the interval to roll over half way through a request
current = Globals.CURRENT_ACOIN_INTERVAL[0]
for i in range(self.number):
result, coin, blob = deposit_acoin(blob, current)
self.returnSlip += result
if result == '0':
total += ACoin.VALUE
self.amountEarned = total
return total
