Developer builds index basket app on Robinhood Chain using standard Web3 tools

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A developer created a simple index basket application on Robinhood Chain, a custom Arbitrum-based, EVM-compatible blockchain, to explore its end-to-end development workflow. The app allows users to deposit Stock Tokens — ERC-20 tokens representing real equity exposure — and receive a basket share priced from live feeds, which can later be redeemed. Despite running on a custom chain, the developer used familiar tools including Solidity, Foundry, viem, and React with wagmi, finding the experience comparable to standard Ethereum development. Stock Tokens follow the ERC-8056 Scaled UI Amount extension to handle corporate actions like stock splits, keeping raw contract balances stable while adjusting display values via a UI multiplier. The project's source code and a live demo have been made publicly available on GitHub and Vercel respectively.

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