Wampei Wallet
A non-custodial stablecoin wallet for sending and receiving money, with no blockchain jargon
The problem
Stablecoins move money faster and cheaper than cards or ACH, but most people will not tolerate seed phrases, gas fees, or picking the right chain just to pay a friend or a business.
What I built
The consumer side of the relaunched Wampei: a Venmo-style wallet for
peer-to-peer and consumer-to-business payments in USDC, USDT, USGLO, and
PYUSD across Base, Polygon, Ethereum, and Arbitrum. Every account is a
smart account with email or social sign-in and sponsored gas, so users
never hold a gas token. Recipients can be found by $handle, ENS name,
or wallet address, and users can claim their own name.wampei.com
subdomain. When a payer is short on the right token, the app finds a
route from their other balances (swap or bridge) or falls back to a card
onramp for the exact shortfall.
How it works
A NestJS API with Prisma, PostgreSQL, and Redis runs on AWS ECS Fargate; the Next.js web app runs on Vercel. A shared token registry is the single source of truth for both. The platform fee is batched atomically with each transfer through the smart account, and transaction history is private by default: no social feed. Funds stay in user-owned wallets, so Wampei cannot move, freeze, or reverse them.