Ethereum Transfer Microservice (ethers.js)
A crypto payments super-app
Overview
A small, single-purpose Node.js module that sends Ethereum transactions programmatically using ethers.js, supporting the super-app’s on-chain transfer flows.
Why It Exists
The payments super-app needs a reliable, isolated way to broadcast ETH/token transfers from the backend. Keeping this concern in a minimal module makes the on-chain send path easy to test, audit and reuse.
What We Built
An ESM entry point (index.mjs) built around the ethers library to construct, sign and broadcast Ethereum transactions. The package is intentionally minimal, one dependency, one responsibility, making it a clean building block within the broader super-app backend.
Technologies & Approach
ethers.js for wallet, provider and transaction handling; modern Node.js ESM. The deliberately tiny surface area reduces risk in a money-movement code path.
Outcome / Impact
Provided a focused, reusable on-chain send capability for the super-app, isolating Ethereum transaction logic from the rest of the platform.
Capabilities Demonstrated
- Programmatic Ethereum transaction construction and broadcasting with ethers.js
- Designing minimal, auditable single-responsibility services for money-movement paths