> For the complete documentation index, see [llms.txt](https://docs.trover.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trover.tech/engineering/basket-vault.md).

# Robinhood Chain static basket vault specification

The v1 basket is a Robinhood-Chain-native static vault. It does not integrate Flap and has no active strategy logic. The vault is an ERC-20 share token, holds only operator-approved stock tokens, accepts proportional in-kind deposits, can use a separate USDG zap, and redeems pro rata in kind. A zap-out contract may convert redeemed assets to USDG but remains outside core accounting.

```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IRobinhoodStaticBasketVault {
    struct AssetAllocation { address asset; uint256 targetWeightBps; }
    event Deposited(address indexed caller, address indexed receiver, uint256 shares, uint256[] assetAmounts);
    event Redeemed(address indexed caller, address indexed receiver, address indexed owner, uint256 shares, uint256[] assetAmounts);
    event FeesClaimed(address indexed recipient, uint256 shares);
    event Paused(bool paused);

    function assets() external view returns (AssetAllocation[] memory);
    function previewDeposit(uint256[] calldata maxAssetAmounts) external view returns (uint256 shares, uint256[] memory requiredAmounts);
    function deposit(uint256[] calldata maxAssetAmounts, address receiver, uint256 minShares) external returns (uint256 shares);
    function previewRedeem(uint256 shares) external view returns (uint256[] memory assetAmounts);
    function redeem(uint256 shares, address receiver, address owner, uint256[] calldata minAssetAmounts) external returns (uint256[] memory assetAmounts);
    function claimableFeeShares(address recipient) external view returns (uint256);
    function claimFees(address recipient) external returns (uint256 shares);
}

interface IRobinhoodBasketZap {
    function depositUSDG(address vault, uint256 amountIn, address receiver, uint256 minShares, bytes[] calldata swapData) external returns (uint256 shares);
    function redeemToUSDG(address vault, uint256 shares, address receiver, uint256 minAmountOut, bytes[] calldata swapData) external returns (uint256 amountOut);
}
```

Core requirements:

* Immutable asset list and target weights for each static product.
* Pull-based deposits using `safeTransferFrom` and checks-effects-interactions ordering.
* Pro-rata redemption without external swaps in the core vault.
* ERC-4626-like preview semantics adapted to multiple assets.
* Claimable fee shares rather than push loops.
* Reentrancy protection, pause capability, bounded asset count, and no arbitrary delegate calls.
* Price feeds are for display and zap bounds; in-kind redemption does not depend on an oracle.
* Managed rebalancing, issuer redemption, KYC, and discretionary strategy execution are outside v1.


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