bitrequests.py 文件源码

def make_402_payment(self, response, max_price):
        """Make an on-chain payment."""
        # Retrieve payment headers
        headers = response.headers
        price = headers.get(OnChainRequests.HTTP_BITCOIN_PRICE)
        payee_address = headers.get(OnChainRequests.HTTP_BITCOIN_ADDRESS)

        # Verify that the payment method is supported
        if price is None or payee_address is None:
            raise UnsupportedPaymentMethodError(
                'Resource does not support that payment method.')

        # Convert string headers into correct data types
        price = int(price)

        # Verify resource cost against our budget
        if max_price and price > max_price:
            max_price_err = 'Resource price ({}) exceeds max price ({}).'
            raise ResourcePriceGreaterThanMaxPriceError(max_price_err.format(price, max_price))

        # Create the signed transaction
        onchain_payment = self.wallet.make_signed_transaction_for(
            payee_address, price, use_unconfirmed=True)[0].get('txn').to_hex()
        return_address = self.wallet.current_address
        logger.debug('[OnChainRequests] Signed transaction: {}'.format(
            onchain_payment))

        return {
            'Bitcoin-Transaction': onchain_payment,
            'Return-Wallet-Address': return_address,
            OnChainRequests.HTTP_BITCOIN_PRICE: str(price),
            OnChainRequests.HTTP_PAYER_21USERNAME: urllib.parse.quote(self.username) if self.username else None
        }