Cyan is the first buy now pay later service for the metaverse. Our goal is to make NFTs and all metaverse assets attainable for everyone. Choose to finance your purchase over a period of three months, or get a collateralized loan on your existing NFTs. If you have ETH to stake, you can park them in our Vaults to earn yield!

Theft of unclaimed yield

Permanent freezing of unclaimed yield

Temporary freezing of funds for 24 hours

Theft of gas

Unbounded gas consumption

Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yield

Direct theft of any user NFTs, whether at-rest or in-motion, other than unclaimed royalties

Permanent freezing of funds

Permanent freezing of NFTs

Protocol insolvency

Cyan Codebase

Cyan Documentation

Rewards are distributed according to the impact the vulnerability could otherwise cause based on the Impacts in Scope table further below. 

__Repeatable Attack Limitations__

In cases of repeatable attacks for smart contract bugs, only the first attack will be counted, regardless of whether the smart contract is upgradable, pausable, or killable.

__Public Disclosure of Known Issues__

Bug reports covering previously-discovered bugs acknowledged below are not eligible for any reward through the bug bounty program. 

- If the “setApprovalAll” or “approve” function from a particular collection is invoked prior to the creating of the loan, the locking mechanism will be unable to impede the transfer of the item.
   - To mitigate this, Cyan team will never whitelist those functions to be called from Cyan wallet for any collection.
- ERC721Module is able to lock tokens that aren’t present in the wallet. 
   - Only CyanPaymentPlanV2 contract is able to call “setTokenLock” method and ownership of the token is verified on this contract.
- When declining a Buy Now, Pay Later (BNPL) payment plan, the system will refund the initial downpayment to the plan holder. Should the plan be pre-funded, the allocated funds will revert to the designated vault. However, if the payment plan uses the platform's native token and the plan owner is a smart contract that cannot accept this native token (either due to malicious intent or oversight), the BNPL rejection process will be halted.

__Previous Audits__

Cyan has provided these completed audit review reports for reference. Any unfixed vulnerability mentioned in these reports are not eligible for a reward.

- [Qckhp Bug Report V2](https://drive.google.com/file/d/1f1y-Rv-hNHQ6bBEj6R8h09vqD8oTX_OA/view?usp=sharing)
- [Dulguun Cyan V2 Final](https://drive.google.com/file/d/1cj4N5hNJ5tdNbW01g38Z7-LYC-oe4qRM/view?usp=sharing)
- [Cyan Contract Review_0xQuit](https://drive.google.com/file/d/1mhzTu57--fbx3o5sM0iW-zNJOiOdjhGE/view?usp=sharing)

__Proof of Concept (PoC) Requirements__

A PoC is required for the following severity levels:
- Smart Contract - Critical
- Smart Contract - High
- Smart Contract - Medium

All PoCs submitted must comply with the Immunefi-wide [PoC Guidelines and Rules](https://immunefisupport.zendesk.com/hc/en-us/articles/9946217628561-Proof-of-Concept-PoC-Guidelines-and-Rules). Bug report submissions without a PoC when a PoC is required will not be provided with a reward.

__Reward Payment Terms__

Payouts are handled by the Cyan team directly and are denominated in USD. However, payments are done in USDC.