Checkout integration:
https://business.paysend.com/help/checkout
- General integration scheme - https://business.paysend.com/help/checkout#general-integration-scheme
- Obtain your shop integration API key - https://business.paysend.com/help/checkout#obtain-your-shop-integration-api-key
- Add and configure JavaScript code on your website - https://business.paysend.com/help/checkout#add-and-configure-javascript-code-on-your-website
- Consolidated code - https://business.paysend.com/help/checkout#consolidated-code
- Apple Pay set up guide - https://business.paysend.com/help/checkout#apple-pay-set-up-guide