About Whiteflow
A stablecoin payment gateway for merchants who sell internationally. Customers pay in USDT on Whitechain with zero gas, and the money settles straight to the merchant's own wallet.
What it does
Payment links, payment pages, invoices, QR codes, discount vouchers, multi-currency prices and sales reports, with a one-line payment button and an SDK. Plus Capital: get paid early from future sales.
What makes it different
- Zero gas for the payer: the customer signs once; Whiteflow's relayer pays the gas.
- Instant settlement: money lands in the merchant's own wallet in the same transaction. Whiteflow never holds it.
- Exact amounts: the customer signs for an exact amount, so under- and overpayment can't happen.
- Receipts anyone can check: every receipt is an on-chain transaction.
- Easy to add: a one-line payment button or a small SDK, with signed webhooks.
Why on-chain settlement
Repayment is enforced where the money arrives. One customer payment is split, in the same transaction, between the merchant, the investors who financed it and the fee, under rules neither the merchant nor Whiteflow can change.
Where it stands
Built for ETHGlobal Mumbai. Testnet only, because official USD₮ isn't on Whitechain mainnet yet. The code is open source under the MIT license on GitHub.
What's next
- Pay from another chain: one tested corridor (Ethereum Sepolia USDC into Whitechain USDT) with an exact destination amount and a refund path.
- Business accounts with roles, and settlement-address changes that need a second approval.