def init(card,aid,pix,deposit):
from transport_card import validate,set_deposit,register_contract,clear
validate(card)
set_deposit(card,deposit)
clear(card,[(STATIC,KEY,'dynamic'),(DYNAMIC,KEY,'dynamic')])
static_sector = card.sector(num = STATIC, key = 0, enc = ENC,
method = 'full', read = False)
term_init(p(static_sector.data),p(TERM_INIT(aid,pix)))
static_sector.data.crc16_calc(low_endian = 1)
event = EVENT_CONTRACT(card, AID = aid, PIX = pix, TransactionType = 0)
try:
static_sector.write()
static_sector.set_trailer(KEY, mode = 'dynamic')
dynamic_sector = card.sector(num = DYNAMIC, key = 0, enc = 0xFF,
method = 'full', read = False)
dynamic_sector.data.cast(DYNAMIC_A).__init__(TERM_DYNAMIC)
dynamic_sector.write()
dynamic_sector.set_trailer(KEY, mode = 'dynamic')
register_contract(card,STATIC,aid,pix)
except Exception as e: event.set_error_code(e); raise
finally: event.save(card)
def refill(self,begin,end):
'''
Tries to change contents of current TERM_STATIC structure to represent
contract refilled to be active during begin-end period.
Requires `begin` and `end` parameters to be datetime objects.
'''
if DATE(uint16 = self.validity_limit_date).expired():
raise TimeError('This contract has been expired')
# if current end_date for contract is greater than proposed end date
# then TimeError happened
if self.status == self.VALID_STATUS and \
DATE(uint16 = self.validity_end_date).to_datetime() >= end:
raise TimeError('There is no need to refill this contract')
validity = [
DATE(date = begin).to_int() if self.expired() else self.validity_begin_date,
DATE(date = end).to_int()
]
#using native function due to bug in ctypes handling 8-byte long bit fields
#for now, only changes begin and end dates without meddling with other parameters
term_set_validity(p(self),*validity)
self.status = self.VALID_STATUS
