How does one associate a website user with a Paypal subscription? - api

I am implementing subscriptions to a premium service on a website using Paypal as the payment service. I have successfully created a Catalog Product and Billing Plan through the API, and I am able to get to the payment page on Paypal, but it's not clear how I'm supposed to persist a user identifier through the purchase process.
I assumed it would be something along the lines of passing a user id somewhere, but there's nothing in the Paypal documentation about this. I need to be able to let the user make a purchase and have the Paypal webhook send the confirmation to an endpoint on my site, and that's where I'd expect to get their user id to toggle the subscription on their account on my end.
Is there something I'm missing? There has to be a way to do this cause I'd imagine it's a pretty common use case. If anyone has information or has done this before, I'd love to hear. Thanks.

The only truly secure way I've found when using javascript SDK, is to securely generate a unique custom_id on your server side associated with the user.
Then when you create the buttons, the 'createSubscription' function takes custom_id as a parameter.
Then use a webhook to receive events from your subscription and the custom_id will be present in the body of all BILLING.SUBSCRIPTION events under resource.custom_id.

I am able to get to the payment page on PayPal,
You are vague about what you are doing here. There are multiple ways (and some ways have multiple versions) of accepting subscriptions via PayPal, so it is important that you provide full details about the method you are using.
The time to associate a created subscription ID with a user ID is when it is approved, in the onApprove function if you are using a Smart Payment Button: https://developer.paypal.com/docs/subscriptions/integrate/#4-create-a-subscription

Related

Paypal rest api express checkout with no shipping field (WebProfile handling)

I'm using Paypal rest api to make payment
the workflow is:
Create payment
Redirect to approval Url
User approved (return back to my site)
Execute payment
But there's one thing that I don't want users re-filling shipping address again because it was filled in my website.
So I change the workflow to:
Create web profile (set no shipping field)
Get web profile ID
Create payment with experienceProfileId given
Redirect to approval Url
User approved (return back to my site)
Execute payment
But I found this will create a lots WebProfile every time user request payment.
I think it is crazy to do:
create and delete it later again and again
attempt listing WebProfiles and check which is the one I want to use every time while creating payment
store experienceProfileId as a constant
What is the best practice for handling WebProfile or does there any solution just hiding shipping address while user approving payments?
Maybe this is not the answer regarding this "WebProfile". As a fact, I dont know what exactly "WebProfile" does or is.
I worked on the same Workflow these days. As you wrote I needed to predefine some address. For me it was obvious, that I have to do the database-stuff on my Website. Then I exactly define the order, shipping_address, etc. and send the users to Paypal.
If you predefine the new ShippingAddress() to your ´new ItemList()´ by
$itemlist->setShippingAddress($shippingaddress) the user cannot change it within the Process.
http://i.imgur.com/nAg8jxU.png
Maybe this helps you a little.

How To Know if a paypal transaction is succeed?

I am creating a website where user can buy digital stuff. Its not downloadable material or something like, just a sensitive data.
I used paypal payment button and integrated it to my website. I tested it using paypal sandbox. So, i would like to perform a certain action once the user purchase the item and roll back to the site. So please tell me how it is possible?
For any post-transaction processing you want to do you should use Instant Payment Notification (IPN).
Instant Payment Notification (IPN) is a message service that automatically notifies merchants of events related to PayPal transactions. Merchants can use it to automate back-office and administrative functions, like automatically fulfilling orders and providing customers with order status.
For PHP PayPal provides a basic IPN script to get you started. Alternatively, you could take a look at this IPN template solution I put together many years ago. It has an installer that sets up a MySQL database for you, and then it automatically saves all of the IPN into the database and emails you notifications. You could start with that and then easily customize it to suit your needs.

Payment confirmation using Authorize.net in VB.NET

I have a single authorize.net account, and I have 5 different e-commerce applications tied to that account. Some are posting from a public site and some are posting from managed access sites. I am using SIM and I have read about the Relay Response, but as far as I can tell I can only have one URL listed. That will not work for me as I need a different URL for each different point of entry into the e-commerce system.
My problem at the moment is that I need to update a datafield via a guid upon successful payment completion to confirm purchase of a digital item, but if I put in a relay response page it is getting sent to all my access points and throwing errors. Other parts of the e-commerce system need to send different emails upon completion etc, plus all the urls are different at the top level.
Is there some other way of accomplishing this task that I am overlooking?
Use Silent Post*. It's Authorize.Net's equivalent of Paypal's IPN. It will only post to one URL per account but it happens behind the scenes. This means you can send a custom flag along with each transaction identifying which site the purchase is for and then have it respond accordingly (e.g. send emails, update database, etc).
*I am the author of this content

Paypal API and several emails in same PayPal account

I can not praise with my contribution here, because I am new user,
but would help if I can.
I have a big problem and I do not know how to solve it, please help.
In the same Paypal account with the default email address: email1#somedomain.com, there is 7 more emails:
email2#somedomain.com
email3#somedomain.com
email4#somedomain.com
email5#somedomain.com
email6#somedomain.com
email7#somedomain.com
that's the maximum allowed number of emails under one PayPal account (8).
So we are using API on several pages, and only one API signature can be done in the paypal
interface, so same API signature is used for each web page.
We would like to define where will money go - to which email address inside the same PayPal account.
We use Premium PayPal account, and we know that for logo change, email remove and so on, we would need Business account,
but for defining money receiver email address inside the same PayPal account
we suppose that it can be defined, otherwise we do not se a point of having several email addresses inside one same PayPal account.
The problem is that always is shown default email when making a purchase :S
We tried to define SUBJECT:
SUBJECT=merchantEmailAddress
N O T E: Typically, a merchant grants third-party permissions to a shopping cart...
And set merchantEmailAddress email2#somedomain.com.
In sandbox it works like a charm as soon as we put it on production, default mail is shown again.
Please if anyone had the same issue help.
Thank you very much, this forum is great and I realise that without nice people and contribution as well there would be no answers.
regards
You would not be using SUBJECT unless dealing with Permissions and making calls on behalf of 3rd party PayPal accounts.
You're working with a single PayPal account, so you won't be using SUBJECT at all. You'll use the credentials like you are already.
That said, I'm not sure I'm following you entirely what trying to send to different emails. I don't understand the end goal with that..?? The API credentials are what are going to tell the system where to drop the money, or pull data from, or whatever.
If you're just trying to get different logos to show up during checkout you can do that with parameters in your standard button code or API requests.
Let me know if that helps or not. Again, I'm not sure I'm understanding what you're after here.

How to let only paid members into my iOS app's some sections with in-app purchase?

I am developing an application where I have a section only for paid users where they purchase for the section using the in-app purhcase system in iOS. I know that I need to keep track of the purchase history myself, and this is where the problem begins. I have a database and I am capable of storing users in my database, with a web service interface. How can I create a system where a URL is pinged only when a user has made the purchase.
As an example, I have the URL:
http://example.com/registerUserPremium/userid=123456
How can I get this to be called only when a purchase is made? The most elegant way seems like Apple pinging the URL with a special user ID upon purchase, but I can't find a way of doing it. It is obviously not a solution to make the user call that URL within the app, as it can be cracked/pirated. What is a good way of providing such a mechanism that is piracy-proof. My service is web-based, so if I can get this part done, the rest relies on my server-side mechanism (the user will just send a special key that is stored in its keychain, to the server) so I'll be able to finish the project. In short, I need a way to call a URL only when a purchase is made. What are some possible solutions?
Thanks,
Can.
I see two solutions:
"Server product model" (doc): the appstore contact your servers every time a user makes a purchase. In this case you have all of the information right away.
"Builtin product model" (same doc) in which the application gets the receipt from the appstore. In this latter case you can contact your server special URL, providing the receipt information, and the server can verify that the receipt has not been tampered with asking the app store to verify (it's a simple post, see here).