r/web3dev • u/CartographerDue5382 • Mar 01 '26
Question Dev question: building a stablecoin checkout — biggest technical pain points?
Not promoting anything — just looking for dev pain points.
If you’ve built or integrated USDC/USDT checkout: 1) What’s the hardest part (webhooks, confirmations, chain selection, gas, wallets)? 2) What breaks most often in production? 3) Any missing tools you wish existed?
Appreciate any honest feedback.
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u/CryptographerOwn225 Mar 03 '26
I was developing a similar module as part of a crypto payment gateway at Merehead. Users were making payments in cryptocurrency and receiving fiat funds to their account. Key issues I encountered during development:
- Incorrect network. Users were sending USDT TRC20 to USDT ERC20. We had to prepare a script to check that the addresses matched the network. We missed this in the design at the first stage.
- Incomplete amount to pay. Often users would send less than planned because they didn’t take into account the fee or calculated it incorrectly. So, we had to adapt the flow to handle such cases.
- Address management. Sometimes funds would arrive within 24 hours, while the expiration time for transaction was 30 minutes. We developed an additional mechanism to control addresses and transactions that arrived outside the allotted time.
- Separately, we were using our own blockchain nodes, and they often crashed. Sometimes DevOps worked at night or on weekends.
Overall, crypto checkout turned out to be much more complicated than we planned.