The tag has no wiki summary.

learn more… | top users | synonyms

36
votes
1answer
2k views

Where does paypal's 92233720368547800 number come from? [closed]

There has been a story in the news about a man whose Paypal account was accidentally credited with $92,233,720,368,547,800. Where does this number come from? What sort of programming bug is likely to ...
8
votes
2answers
3k views

Handling subscriptions, balances and pricing plan changes [closed]

Preamble My aim is to create reusable code for multiple projects (and also publish it on github) to manage subscriptions. I know about stripe and recurring billing providers, but that's not what this ...
7
votes
5answers
354 views

What do you do to make the client understand that requirements not mentioned in contract should be charged separately? [closed]

I've done a very small project for a specified amount of payment. The project was some client-side validation code. However, now client asks for code improvement (general code improvement including ...
7
votes
3answers
701 views

Integrating with a payment provider; Proper and robust OOP approach

History We are currently using a so called redirect model for our online payments (where you send the payer to a payment gateway, where he inputs his payment details - the gateway will then return ...
4
votes
2answers
560 views

How to overcome the fear of building a web application with a recurring payment system?

I'm a Ruby on Rails developer. I'd like to create a web application. I will let users get a payed subscription to use the product. So I will need a recurring billing system (e.g. via paypal). But ...
3
votes
4answers
727 views

Freelancing - Getting paid for the quote or estimate [closed]

It is often necessary to spend time designing a solution, breaking down the design into tasks and sub tasks and estimating the time it will take to complete each task in order to produce a reasonable ...
3
votes
3answers
1k views

Should I ask for advance payment on custom work? [closed]

...for project-based work. So far I didn't, and always got paid when work was complete and didn't ran into any problems. Does this make me look unprofessional? :) Should I ask like 25% - 50% advance ...
3
votes
2answers
281 views

Using Paypal (or similar) to log into my site?

I have a web site and I want to offer a few levels of service - one free, one for a one-off payment, and one for a subscription. My first inclination is to use Paypal for the payment options. I ...
2
votes
3answers
782 views

Payment Gateways and RESTful API

I have a RESTful API that offers eCommerce functionality. One area I'm struggling to decide on the correct implementation is how to process payments. Lets say I have the following URI GET ...
1
vote
5answers
306 views

Is there a way for developers and their clients to make a 'safety net' for the final transaction of software for money? [closed]

First off, we presume that the projects in question are not large or important enough for the parties involved to establish a formal contract, and that the parties are not able to meet in person. So, ...
1
vote
1answer
211 views

How do I verify if 3rd party payment succeeded?

I'm working on a payment processing website that will function like PayPal does on many e-commerce websites. The idea is for the customer to fill their shopping cart and click checkout, then be ...
1
vote
1answer
397 views

How does a paid Saas actually work? [closed]

Could anyone explain to me how does a paid Saas work please? I know for free Saas you can just create some kind of registration and authentication process which allows the users to use all features. ...
1
vote
1answer
256 views

PayPal proof of payment - is there a need to store it at our server?

I am developing an iPhone app, which I am integrating with PayPal. I did it successfully using PayPal library. I am testing it on sandbox mode. When I transfer money from one account to the other ...
-1
votes
1answer
230 views

Should I pay for the use of subversion? [closed]

I am confused about paying subversion. Our company has a solution and wants to manage the version of the source. Our company product is obviously commercial product and not open source. & it's not ...
-1
votes
5answers
438 views

Rewarding open-source contributors [closed]

Is there a service which could help me reward (pay) the contributors of an open-source project by their contribution to the project (Maybe using data from where the code is hosted GitHub)? Maybe by ...
-4
votes
0answers
22 views

Accepting online payments, and dispensing them [closed]

I want to create a system where a person can pay someone else via our website/mobile app. Person A pays using their credit card, our service takes a small percentage, holds the funds in escrow for a ...