from api import Tronscan
from custom_decorators import singleton
from utils.datetime import current_timestamp


@singleton
class Payment:
    def __init__(self, api_key):
        self.tronscan = Tronscan(api_key)

    def check_payment(self, quant, from_address, to_address, order_create_timestamp):
        result = self.tronscan.token_trc20_transfers(from_address=from_address,
                                                     to_address=to_address,
                                                     start_timestamp=order_create_timestamp,
                                                     end_timestamp=int(current_timestamp() * 1000))
        token_transfers = result['token_transfers']
        token_transfer = token_transfers[-1]
        confirmed = token_transfer['confirmed']
        correct_quant = quant == (token_transfer['quant'] / 6)
        confirmed = confirmed and correct_quant
        return confirmed