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I have a sales page, when customer click BUY button on that page it takes him to Checkout page. User enter payment data, click BUY button and buys a product, which redirects him now to One click upsell with an offer. When user clicks BUY on upsell page I want previous entered payment data to be used to immediately buy product on upsell, without user entering payment data again or confirming payment.
So flow is: Landing page – Checkout – Upsell (when clicks buy it just buy that product on the upsell using previous entered payment data)
This was possible with Reference transactions but since Paypal terminated it it’s not possible anymore.
I use WordPress for all of this.
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Well its a whole lot task and you might require additional paid help.
Nonetheless here’s how you would do it,
While creating post pass the previously entered data, and on next page if previously entered data is available, populate input fields