Before you can use Secure Fields in your web checkout we will need to create a checkout session.

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Install a server-side SDK

Use the package manager in your preferred programming language to install our server-side SDK. Token generation can only be done server side and we do not recommend doing this client side as it will expose your API key to your customers. 
dotnet add package Gr4vy
Please always check and install the latest release of your preferred SDK.

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Initialize the SDK client

Next, initialize the SDK with the ID of your instance and the private key. 
using Gr4vy;
using Gr4vy.Models.Components;
using System.Collections.Generic;

// Loaded the key from a file, env variable, 
// or anywhere else
var privateKey = "..."; 

var sdk = new Gr4vySDK(
    id: "example",
    server: SDKConfig.Server.Sandbox,
    bearerAuthSource: Auth.WithToken(privateKey),
    merchantAccountId: "default"
);
The instance ID is the unique identifier for your deployment of our system and is included in every API call. Together with the environment (sandbox or production) it is used to connect to the right APIs, as well as dashboard.The possible values for your ID are one of wpay, wpay1, wpay2, or wpay3. We will inform you in which instance your account has been set up.

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Generate a checkout session

The final step is to create a new checkout session for use by Secure Fields. Checkout sessions can store also store cart_items, metadata, airline data, and more, removing the need to pass these values on the transaction request. 
using Gr4vy;
using Gr4vy.Models.Components;
using NodaTime;
using System;
using System.Collections.Generic;

var sdk = new Gr4vySDK(
    merchantAccountId: "default",
    bearerAuth: "<YOUR_BEARER_TOKEN_HERE>"
);

var checkoutSession = await sdk.CheckoutSessions.CreateAsync(checkoutSessionCreate: new CheckoutSessionCreate() {
    CartItems = new List<CartItem>() {
        new CartItem() {
            Name = "GoPro HD",
            Quantity = 2,
            UnitAmount = 1299,
            DiscountAmount = 0,
            TaxAmount = 0,
            ExternalIdentifier = "goprohd",
            Sku = "GPHD1078",
            ProductUrl = "https://example.com/catalog/go-pro-hd",
            ImageUrl = "https://example.com/images/go-pro-hd.jpg",
            Categories = new List<string>() {
                "camera",
                "travel",
                "gear",
            },
            ProductType = "physical",
            SellerCountry = "GB",
        },
        new CartItem() {
            Name = "GoPro HD",
            Quantity = 2,
            UnitAmount = 1299,
            DiscountAmount = 0,
            TaxAmount = 0,
            ExternalIdentifier = "goprohd",
            Sku = "GPHD1078",
            ProductUrl = "https://example.com/catalog/go-pro-hd",
            ImageUrl = "https://example.com/images/go-pro-hd.jpg",
            Categories = new List<string>() {
                "camera",
                "travel",
                "gear",
            },
            ProductType = "physical",
            SellerCountry = "GB",
        },
        new CartItem() {
            Name = "GoPro HD",
            Quantity = 2,
            UnitAmount = 1299,
            DiscountAmount = 0,
            TaxAmount = 0,
            ExternalIdentifier = "goprohd",
            Sku = "GPHD1078",
            ProductUrl = "https://example.com/catalog/go-pro-hd",
            ImageUrl = "https://example.com/images/go-pro-hd.jpg",
            Categories = new List<string>() {
                "camera",
                "travel",
                "gear",
            },
            ProductType = "physical",
            SellerCountry = "AU",
        },
    },
    Metadata = new Dictionary<string, string>() {
        { "cohort", "cohort-a" },
        { "order_id", "order-12345" },
    },
    Buyer = new GuestBuyerInput() {
        DisplayName = "John Doe",
        ExternalIdentifier = "buyer-12345",
        BillingDetails = new BillingDetailsInput() {
            FirstName = "John",
            LastName = "Doe",
            EmailAddress = "john@example.com",
            PhoneNumber = "+1234567890",
            Address = new Address() {
                City = "San Jose",
                Country = "AU",
                PostalCode = "94560",
                State = "California",
                StateCode = "US-CA",
                HouseNumberOrName = "10",
                Line1 = "Stafford Appartments",
                Line2 = "29th Street",
                Organization = "Gr4vy",
            },
            TaxId = new TaxId() {
                Value = "12345678931",
                Kind = "ar.cuit",
            },
        },
        ShippingDetails = new ShippingDetailsCreate() {
            FirstName = "John",
            LastName = "Doe",
            EmailAddress = "john@example.com",
            PhoneNumber = "+1234567890",
            Address = new Address() {
                City = "San Jose",
                Country = "AU",
                PostalCode = "94560",
                State = "California",
                StateCode = "US-CA",
                HouseNumberOrName = "10",
                Line1 = "Stafford Appartments",
                Line2 = "29th Street",
                Organization = "Gr4vy",
            },
        },
    },
});

// handle response
The id if this session can now be passed to your checkout page, where it can be used by Secure Fields.

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Summary

In this step you:
  • Installed the SDK
  • Created a new checkout session.
  • Passed the id if this session your front-end application, where it will be used by Secure Fields.