It is not the same ball game with the conventional payment systems.
When I got into Crypto Payment Gateway development, I thought it would probably be just like developing something like a Stripe integration. It turned out, however, that blockchain presents a different set of rules rather quickly. What is not straight forward with the traditional payment gateways is API calls, response code, and that is it. Crypto? Not nearly so much.
Blockchain Networks Complicatedness
Every block-chain acts autonomously. Ethereum gas fees are highly volatile, often spiking unpredictably like a rollercoaster. Bitcoin involves verifications which might require minutes. There are those tokens supposedly based on ERC- 20 but do exactly the opposite. As a developer you simply can not depend on documentation, all things have to be tested.
Security-centered Construction
Security is essential, not a choice. You no longer are protecting user data on your own. It involves personal keys, wallet access, and actual money that once sent never can be returned. I was using third-party wallet services available in the market at first, but then I came to like self-custody that most businesses are changing to. This implied the construction or incorporation of secured, non-custodial wallet solutions.
Streamlining the User Experience
The customers seek convenient checkout experiences. However, crypto means that copying addresses, network switching, or even and especially confirmation can become friction points. I wanted to conceal such complexity, support the concept of QR codes, monitor association to the wallet and real-time status update so that even a non-technical individual can feel comfortable in making payments.
Real Value of a Crypto Gateway
When everything was assembled, I realized what kind of a good crypto payment gateway may provide: instant making payments around the globe, the lowest fees, zero-chargebacks, and constant availability. That is a game-changer in the case of international businesses and digital platforms.
Final Thoughts
And thinking of developing a Crypto Payment Gateway? Well, you have to be ready to walk a steep road. However, also get ready to be amazed by huge opportunities. It is not that you are building a tool but you are a part of the future of payments. It is technical, tough and very fulfilling.
Top comments (1)
Great writeup Edwin. The self-custody shift you mention is real — most serious merchants I've talked to want their funds going straight to their own wallet, not sitting in some intermediary's hot wallet waiting to get hacked.
The UX friction part is the hardest problem IMO. I've been working on a non-custodial gateway (coinpayportal.com) and the biggest challenge is exactly what you described — making the QR code to confirmation to webhook flow feel as smooth as Stripe while keeping the user in full control of their keys. Gas fee volatility on Ethereum is brutal for checkout UX too. We ended up leaning heavily on Lightning for BTC payments since confirmations are near-instant.
Curious what chains you ended up supporting and whether you went with HD wallets for address generation or something else?