topizzy
Spend your $USDC buy airtime directly across four East African countries, quickly and conveniently
Project Description
Topizzy is built as a mini-app on Base that enables users to spend USDC directly for airtime purchases. The project has two main components: a TypeScript-based frontend and Solidity smart contracts deployed on Base.
The frontend handles wallet connection, selecting country and telecom operator, and confirming airtime purchases. It interacts with the blockchain using standard EVM tooling and provides real-time transaction feedback to users.
The smart contracts record purchase requests and emit events when payments are confirmed on-chain. An off-chain relayer listens for these events and then triggers the airtime purchase via telecom APIs. This removes the need for off-ramping and keeps the entire process within the crypto ecosystem.
Using Base gives us low fees, fast confirmation, and access to USDC with strong liquidity — all essential for everyday micro-transactions like airtime top-ups.
Overall, the system is designed to be simple, secure, and seamless, delivering a crypto-native experience for real-world spending in East Africa.
How it's Made
Topizzy is a mini app built on Base that makes it easy for people in East Africa to spend USDC on everyday needs, starting with airtime and data bundles. Crypto users often face friction when accessing real-world services: they must first convert (offramp) their crypto to local currency before completing simple tasks like topping up airtime. This extra complexity creates a barrier to adoption.
Topizzy removes that hurdle entirely.
Users can directly purchase airtime from major telecom providers across East African countries without leaving the crypto ecosystem. By streamlining the process into a single seamless flow, Topizzy lets users fully benefit from stable, borderless digital money like USDC. Our mission is to make spending crypto feel as easy as spending cash in a mobile wallet: intuitive, fast, and accessible.
Ultimately, Topizzy aims to accelerate real-world crypto utility in the region by integrating more local services over time, giving users the freedom to transact and participate in the digital economy without unnecessary steps or intermediaries.
