< form action = " / charge " method = " POST "> < script src = " https://checkout.stripe.com/checkout.js " class = " stripe-button " data-key = " pk_test_6pRNASCoBOKtIshFeQd4XMUh " data-image = " /square-image.png " data-name = " Site de demonstração " data-description = " 2 widgets (US $ 20,00) " data-amount = " 2000 ">