public sendPaypal(price: string): void {
    this.reservation();
    this.hidden = true;
    this.loadExternalScript('https://www.paypalobjects.com/api/checkout.js').then(() => {
      paypal.Button.render({
        env: 'sandbox',
        client: {
          production: '',
          sandbox: 'AcUXHundjcOxwZFDFGU2rluWl9nSUtB_J83azAMEWyU7vPEcG56hsZzTCuO4Hqx1GNADkTMjc5ObWJsi'
        },
        locale: 'fr_FR',
        style: {
          color: 'blue',
          shape: 'rect',
          size: 'medium'
        },
        commit: true,
        payment: function (data, actions) {
          return actions.payment.create({
            'intent': 'sale',
            'payer': {
              'payment_method': 'paypal'
            },
            'transactions': [
              {
                'amount': {
                  'total': price,
                  'currency': 'EUR',
                },
                'description': 'Réservation de places de cinéma',
                'payment_options': {
                  'allowed_payment_method': 'INSTANT_FUNDING_SOURCE'
                }
              }
            ],
            'redirect_urls': {
              'return_url': 'http://imagix-api20171119050303.azurewebsites.net/home',
              'cancel_url': 'http://imagix-api20171119050303.azurewebsites.net/home'
            }
          })
        },
        onAuthorize: function(data, actions) {
          return actions.payment.execute().then(function(payment) {

          })
        }
      }, '#paypal-button');