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

# Security

## Audit & test status

| Contract              | Tests                                                                                  | Findings                    |
| --------------------- | -------------------------------------------------------------------------------------- | --------------------------- |
| `CheomaPreDeposit` v3 | 57/57 forge tests (46 functional + 11 adversarial PoCs, incl. 256-run accounting fuzz) | No Critical / High / Medium |
| `PartnerPreDeposit`   | 80/80 forge tests                                                                      | No Critical / High / Medium |

## Design properties

* **No proxy / upgradeability** — immutable logic, no admin takeover surface.
* **No external dependencies** — hand-rolled reentrancy guard, checks-effects-interactions throughout.
* **Deterministic on-chain accrual** — interest from `block.timestamp`, no discrete rate jump, no front-run window.
* **Soulbound receipts** — non-transferable, no secondary-market manipulation of the claim.

## Attack families closed

1. **Donation / inflation** — rate derives from internal `totalAssets` state, not `balanceOf`; direct transfers can't inflate the rate; `shares == 0` guarded.
2. **Rounding** — every division rounds down; dust stays in the vault.
3. **Front-running / timing** — continuous accrual, no discrete jump.

## Custody split

* `admin` (HOT) = config only, cannot move funds.
* `treasury` (COLD) = sole funds mover, held offline.

## Disclaimers

Promotional APRs (52%, 56.3%) are time- and cap-bounded campaign rates, not a promise of sustainable yield. Sustainable design target is \~13% APR. Yield is dependent on operator presence. Nothing here is financial advice.


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