JAVASCRIPT EXPRESS CHECKOUT :

HEADERS

                
                    < head>
                         < script src="https://pay.payphonetodoesposible.com/api/button/js?appId=TU_IDENTIFICADOR">< /script> 
                    < /head>
                
            

BODY

                
                    < script>             
                        /* Script Express Checkout */
                        window.onload = function() {

                            payphone.Button({
                                token: "Colocar-Tu-Token",
                                //PARÁMETROS DE CONFIGURACIÓN
                                btnHorizontal: true,
                                btnCard: true,
                                
                                createOrder: function(actions){

                                    return actions.prepare({
                                        amount: 1296,
                                        amountWithoutTax: 400, 
                                        amountWithTax: 800,
                                        tax: 96,
                                        service: 0,
                                        tip: 0,               
                                        clientTransactionId: "250403-1808-3360",
                                        reference: "Express Checkout Test https://payphone.website",
                                        currency: "USD",                   
                                        storeId: "Colocar-Tu-StoreID", 
                                                
                                    });

                                },

                                onComplete: function(model, actions){  
                                    console.table(model);                    
                                }

                            }).render('#pp-button');
                        }
                    < /script>	
                    < div id="pp-button">
                
            

DOCUMENTACIÓN EXPRESS CHECKOUT :

https://docs.payphone.app/doc/expresscheckout/