from BitPay
"Checkout Integration
BitPay Hosted Checkout has 1 click on the BitPay website to process the payment, and then the shopper is returned to your website.
On our page, the shopper is presented with the payment instructions. After the payment is received, the page updates to show a receipt, and the shopper is given a link to click back to your website"
https://bitpay.com/help-hosted-checkoutis there an option to do an automatic redirect or add the affiliate tracking pixel to the checkout page ?