InvisibleRail — Merchant USDC Checkout
July 2026
Encode Club Programmable Money Hackathon • Build on Arc Track
A merchant USDC checkout engine with immutable refund-policy versioning and deterministic refund-policy evaluation. Binds each purchase to the exact refund policy active at checkout and executes autonomous, explainable refund decisions logged on-chain.
skills & technologies used
SolidityTypeScriptCircle WalletsArc TestnetNext.jsTailwind CSS