On-chain index baskets on Robinhood Chain — app.vimen.org · @vimenprotocol
This repository contains the on-chain protocol: contracts, tests, deploy tooling and documentation. The hosted app lives at app.vimen.org.
Permissionless "mini-ETFs" on Robinhood Chain (chain id 4663). A basket token is an ERC-20 fully backed by fixed raw quantities of Robinhood Stock Tokens held by its own immutable contract. Mint deposits the constituents in-kind; redeem burns and returns them. No oracles in the core. No admin keys over funds. Redeem always works.
| Basket | Symbol | Constituents | Contract (Robinhood Chain) |
|---|---|---|---|
| Magnificent 7 | MAG7 |
AAPL MSFT GOOGL AMZN META NVDA TSLA | 0xe1c1ADAD813736427B334e798fd2EbC7d2C7A9DF |
| The Hood Six | HOOD6 |
CASHCAT ARROW HOODRAT VIBECAT VEX VIRTUAL | 0x0CE04932513Fa1768B5b9444c6A21Ae0DdA005C5 |
| The AI Six | AI6 |
NVDA AMD MU PLTR GOOGL SPCX | 0x8fF1d77a09A3292b34457175710Bb0C0A1C22601 |
All three deployed 2026-07-12 with source verified on Blockscout, plus
VimenZap2
(0x7cE8cC58746cf16d415B6244FC178A67f3ABc776), the single-transaction
mint/redeem router over Uniswap v4 and Rialto (supersedes
v1, which
remains live and functional). Guardian and fee recipient of every basket is
the protocol Safe
0xc7aBc67fBB12B69240A4C213c39547C8a345Ec02.
Alongside the baskets ships VimenZap — a stateless Uniswap v4 router that mints or redeems a basket in a single transaction from one asset — and a curator platform (VIMEN staking, permissionless basket publishing) slated for a later phase.
- Units are fixed raw ERC-20 amounts per 1e18 basket wei, computed once at deploy from live Chainlink prices (equal USD weight, ≈$100/token target). Weights drift with prices afterwards, like an unrebalanced ETF.
- Stock Tokens implement ERC-8056 (scaled UI amounts). Corporate actions change the display multiplier, never raw balances — so the contract ignores the multiplier entirely and stays exact through splits and reinvested dividends.
- Rounding always favors the vault: deposits round up, redemptions round down (≤1 wei per constituent per operation).
- Mint fee 0.30% (hard-capped at 0.50% in code), taken in basket tokens so the backing invariant stays exact. Redeem is free and ungated, forever.
- A guardian (Safe) can only: pause minting, move the supply cap under an immutable ceiling, and change the fee recipient. Nothing else exists.
Full threat model, accepted static-analysis findings and spec deviations: SECURITY.md.
contracts/ Foundry — BasketToken, VimenZap (Uniswap v4 router), curator
platform (CuratorRegistry, BasketFactory, FeeSplitter, VimenToken)
+ unit/fuzz/invariant/fork tests
scripts/ computeUnits.ts — converts equal weights into raw units at deploy
docs/ architecture, deploy runbook, tokenomics, zap design, roadmap
# clone with the OpenZeppelin submodule (pinned to v5.6.1)
git clone --recurse-submodules https://github.com/vimenprotocol/vimen.git
# contracts — 107 tests: unit, fuzz, invariant + fork suites
cd contracts && forge test
# fork tests against Robinhood Chain mainnet (self-skip when RH_RPC is unset)
RH_RPC=https://rpc.mainnet.chain.robinhood.com forge test --match-contract ForkCI runs forge fmt --check, the full test suite and scripts typecheck on
every push (ci.yml).
Deposits are capped per basket and the caps rise with demonstrated volume — $100K at launch → $500K on sustained traction → $2M post-audit → $10M+ at scale, always under the immutable on-chain ceiling. Criteria and governance rails: docs/ROADMAP.md.
See docs/DEPLOY.md — units computation must run during US
market hours (feeds are 24/5), and mainnet broadcast is gated behind an
explicit human confirmation (CONFIRM_DEPLOY=yes).
- The underlying Stock Tokens are debt instruments of Robinhood Assets (Jersey) Ltd and carry issuer risk. The issuer can pause or freeze the underlying tokens; this protocol inherits that risk and cannot remove it. If any constituent is frozen, redeeming the whole basket reverts until the freeze lifts.
- The contracts are unaudited. Supply caps are deliberately low at launch for exactly this reason.
- Not available to US, UK, Canadian, Swiss or UAE persons. The hosted frontend is geoblocked accordingly. Nothing here is investment advice.