# ReceiptVerifier
Verify iTunes receipt with the App Store.
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## Installation
If [available in Hex](https://hex.pm/docs/publish), the package can be installed as:
1. Add receipt_verifier to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:receipt_verifier, "~> 0.2.0"}]
end
```
2. Ensure receipt_verifier is started before your application:
```elixir
def application do
[applications: [:receipt_verifier]]
end
```
## Usage
### Configuration
> you can ignore this if you dont have auto-renewable product
Follow [this guide](https://developer.apple.com/library/content/documentation/LanguagesUtilities/Conceptual/iTunesConnectInAppPurchase_Guide/Chapters/CreatingInAppPurchaseProducts.html#//apple_ref/doc/uid/TP40013727-CH3-SW2) to generate a shared secret, then config the `:receipt_verifier` application with:
```elixir
use Mix.Config
config :receipt_verifier,
shared_secret: "my-secret"
```
### Verify the receipt with the App Store
```elixir
{:ok, result} = ReceiptVerifier.verify(base64_encoded_receipt_data)
%ReceiptVerifier.Receipt{receipt: receipt, latest_receipt: latest_receipt, latest_receipt_info: latest_receipt_info} = result
receipt = %{"adam_id" => 0, "app_item_id" => 0, "application_version" => "1241",
"bundle_id" => "com.sumiapp.GridDiary", "download_id" => 0,
"in_app" => [%{"is_trial_period" => "false",
"original_purchase_date" => "2014-08-04 06:24:51 Etc/GMT",
"original_purchase_date_ms" => "1407133491000",
"original_purchase_date_pst" => "2014-08-03 23:24:51 America/Los_Angeles",
"original_transaction_id" => "1000000118990828",
"product_id" => "com.sumiapp.GridDiary.pro",
"purchase_date" => "2014-09-02 03:29:06 Etc/GMT",
"purchase_date_ms" => "1409628546000",
"purchase_date_pst" => "2014-09-01 20:29:06 America/Los_Angeles",
"quantity" => "1", "transaction_id" => "1000000118990828"},
%{"is_trial_period" => "false",
"original_purchase_date" => "2014-09-02 03:29:06 Etc/GMT",
"original_purchase_date_ms" => "1409628546000",
"original_purchase_date_pst" => "2014-09-01 20:29:06 America/Los_Angeles",
"original_transaction_id" => "1000000122102348",
"product_id" => "com.sumiapp.griddiary.test",
"purchase_date" => "2014-09-02 03:29:06 Etc/GMT",
"purchase_date_ms" => "1409628546000",
"purchase_date_pst" => "2014-09-01 20:29:06 America/Los_Angeles",
"quantity" => "1", "transaction_id" => "1000000122102348"}],
"original_application_version" => "1.0",
"original_purchase_date" => "2013-08-01 07:00:00 Etc/GMT",
"original_purchase_date_ms" => "1375340400000",
"original_purchase_date_pst" => "2013-08-01 00:00:00 America/Los_Angeles",
"receipt_creation_date" => "2014-09-02 03:29:06 Etc/GMT",
"receipt_creation_date_ms" => "1409628546000",
"receipt_creation_date_pst" => "2014-09-01 20:29:06 America/Los_Angeles",
"receipt_type" => "ProductionSandbox",
"request_date" => "2016-04-29 07:52:28 Etc/GMT",
"request_date_ms" => "1461916348197",
"request_date_pst" => "2016-04-29 00:52:28 America/Los_Angeles",
"version_external_identifier" => 0}
```
### Error handling
If there is error, `ReceiptVerifier.verify/1` will return `{:error, %ReceiptVerifier.Error{}}`.
An example:
```elixir
{:error, %ReceiptVerifier.Error{code: 21002, message: "The data in the receipt-data property was malformed or missing."}}
```