I built my first Robinhood Chain app as an index basket

Short summary

A developer walks through building an index basket app on Robinhood Chain, a custom Arbitrum L2. Users deposit Stock Token ERC-20s and receive a priced basket share redeemable for underlying tokens. The post covers the full EVM developer path—Solidity, Foundry, viem, wagmi—and explains ERC-8056's scaled UI amount extension for handling corporate actions without breaking contract accounting.

• •Built an ERC-20 index basket dapp on Robinhood Chain (custom Arbitrum L2)
• •Full developer path: Solidity, Foundry, viem, wagmi, React frontend
• •ERC-8056 scaled UI amounts keep contract balances stable during stock splits and dividends

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