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

# SocialhoodKeys

The creator key market contract. Non-upgradeable, no proxy, deployed once.

## Interface highlights

```solidity
function buyKeys(address subject, uint256 amount) external payable;
function sellKeys(address subject, uint256 amount) external;
function getBuyPriceAfterFee(address subject, uint256 amount) external view returns (uint256);
function getSellPriceAfterFee(address subject, uint256 amount) external view returns (uint256);
function keysSupply(address subject) external view returns (uint256);
function keysBalance(address subject, address holder) external view returns (uint256);
function claimFees() external; // pull fallback if a fee push failed

event Trade(address indexed trader, address indexed subject, bool isBuy,
            uint256 amount, uint256 ethAmount, uint256 creatorFee,
            uint256 protocolFee, uint256 newSupply);
```

## Economics

* Unit price at supply `s`: `s² × 1e18 / 32,000` wei.
* 10% fee on buys **and** sells: 7% creator, 3% protocol treasury.
* Overpayment on buys is refunded in the same transaction.

## Guarantees

* First key of a market can only be bought by its subject (anti-impersonation).
* Keys are **soulbound** — no transfer function. Value can only enter and exit through the curve, so creator fees cannot be bypassed by OTC transfers.
* Invariant-tested: the contract can always pay out every key sold back to it.
* Owner (multisig) powers are limited to updating the treasury address and transferring ownership. No mint, no pause, no parameter changes.


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