jonathanpeppers

private TaskCompletionSource<Order> _purchaseSource;
private IPublicKey _publicKey;

//NOTE: get this key from the Google Play dev console, under Development Tools | Services & APIs | Licensing & in-app billing
public string PublicKey { get; set; }

//Order details class, parsed from JSON
private sealed class Order
{
    public string PackageName { get; set; }

jonathanpeppers

protected async override Task<Receipt> BuyNative(Purchase purchase)
{
    var context = (Activity)Xamarin.Forms.Forms.Context;
    string developerPayload = Guid.NewGuid().ToString("N");
    var buyIntent = _connection.Service.GetBuyIntent(BillingConstants.ApiVersion, context.PackageName, purchase.Id, BillingConstants.ItemTypeInApp, developerPayload);

    int response = buyIntent.GetInt(BillingConstants.ResponseCode);
    if (response != BillingConstants.ResultOk)
    {
        //NOTE: see my full example for handling BillingConstants.ResultItemAlreadyOwned

jonathanpeppers

#!/bin/bash

# Change these variables for your keystore
KEYSTORE="iap.keystore"
ALIAS="iap"
PASSWORD="YOUR_KEYSTORE_PASSWORD"

# These are variables that Xamarin.Android expects
OUT_KEYSTORE="debug.keystore"
OUT_ALIAS="androiddebugkey"

jonathanpeppers

public class GooglePlayPurchaseService : PurchaseService
{
    private BillingConnection _connection;

    private sealed class Product
    {
        public string Title { get; set; }
        public string Price { get; set; }
        public string Type { get; set; }
        public string Description { get; set; }

jonathanpeppers

public class BillingConnection : Java.Lang.Object, IServiceConnection
{
    private TaskCompletionSource<bool> _connectSource;

    public IInAppBillingService Service
    {
        get;
        private set;
    }

jonathanpeppers

public class BillingConstants
{
    public const int ApiVersion = 3;

    // Billing response codes
    public const int ResultOk = 0;
    public const int ResultUserCancelled = 1;
    public const int ResultBillingUnavailable = 3;
    public const int ResultItemUnavailable = 4;
    public const int ResultDeveloperError = 5;

jonathanpeppers

# Google Play Billing 
-keep class com.android.vending.billing.**

jonathanpeppers

//Use this as a singleton in your app
public class AzureClient
{
    private const string BaseUrl = "https://YOUR_DOMAIN.azurewebsites.net/api/";
    private readonly HttpClient _client = new HttpClient();

    public async Task Verify(AppleReceipt receipt)
    {
        var content = new JsonContent(receipt);
        var response = await _client.PostAsync(BaseUrl + "ios?code=YOUR_CODE_HERE", content);

jonathanpeppers

#r "Newtonsoft.Json"
#load "models.csx"
#load "AppleReceipt.cs"

using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

private const string AppleProductionUrl = "https://buy.itunes.apple.com/verifyReceipt";
private const string AppleTestUrl = "https://sandbox.itunes.apple.com/verifyReceipt";

jonathanpeppers

#r "Newtonsoft.Json"
#load "models.csx"
#load "AppleReceipt.cs"

using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

private const string AppleProductionUrl = "https://buy.itunes.apple.com/verifyReceipt";
private const string AppleTestUrl = "https://sandbox.itunes.apple.com/verifyReceipt";