← Revenue attribution guide

Attribute revenue with Paddle Overlay Checkout

When using Paddle's Overlay Checkout (inline checkout), pass customData with datafast_visitor_id and datafast_session_id when opening the checkout:

// Get DataFast cookies
function getCookie(name) {
  const value = `; ${document.cookie}`;
  const parts = value.split(`; ${name}=`);
  if (parts.length === 2) return parts.pop().split(';').shift();
}

// Open Paddle checkout with DataFast attribution
Paddle.Checkout.open({
  items: [{ priceId: 'pri_01234567890', quantity: 1 }],
  customData: {
    datafast_visitor_id: getCookie('datafast_visitor_id'),
    datafast_session_id: getCookie('datafast_session_id')
  }
});

Once connected and custom data is properly passed, DataFast will automatically attribute revenue to the correct marketing channels. No webhook setup is required.

Important notes

• Works with Paddle's inline/overlay checkout experience
• Duplicate payment events are ignored so you don't need to worry about multiple transactions