Chainlink

Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System V2.2. This is a simplified 5-level scale, with separate scales for websites/apps, smart contracts, and blockchains/DLTs, focusing on the impact of the vulnerability reported.

All Smart Contracts bug reports require a proof of concept (PoC) and a suggestion for a fix to be eligible for a reward. All Websites and Applications bug reports must come with a PoC with an end-effect impacting an asset in scope in order to be considered for a reward. Explanations and statements are not accepted as PoCs and code is required.

Rewards for Critical Smart Contract vulnerabilities are at the sole and exclusive discretion of Chainlink Labs, with maximum reward of USD $3,000,000.

Specific reward amounts are determined based on a number of factors, such as the impact of proposed issues, ease of exploitability, and how likely the exploit conditions might occur.

Any supplementary reward beyond the minimum for the assigned criticality rating is at the discretion of Chainlink Labs.

KYC requirement

To ensure compliance, Chainlink Labs requires Know-Your-Customer (KYC) information to be provided for all bug bounty reporters submitting a report and requesting a reward.

The information required:

• Color copy of passport

  • Full Legal Name (First, middle, and last, plus any prefix, and/or suffix)

• Proof of current address (either a redacted bank statement with your address or a recent utility bill with your name, address, and issuer of the bill)

• If you are a U.S. citizen, permanent resident, partnership, LLC, corporation, estate or trust, please send a filled-out and signed W-9 (https://www.irs.gov/pub/irs-pdf/fw9.pdf)

• If you are not a U.S. citizen or permanent resident, please send a filled-out and signed W-8BEN for individual and W-8 BEN-E for entities (https://www.irs.gov/pub/irs-pdf/fw8ben.pdf; https://www.irs.gov/pub/irs-pdf/fw8bene.pdf), and provide statement to certify that all services are performed outside of the U.S.

• Ethereum Wallet Address (for transfer of payment)

All bug bounty reporters must pass the Office of Foreign Asset Control (OFAC) Specially Designated Nationals And Blocked Persons List (SDN) list screening. Rewards cannot be paid out if reporters are on the OFAC SDN list.

The collection and review of this information will be handled by the Chainlink Labs team directly.

Payouts are handled by the Chainlink Labs team directly, denominated in USD, and sent in Ethereum (ETH) or USD Coin (USDC).

Feasibility Requirement and Limitations

Chainlink will take the feasibility of an attack into consideration when determining if and how much a reported issue receives as a bounty. More information on feasibility limitations can be found under Immunefi’s Feasibility Standards.

Repeatable Attacks

In the event a report applies to multiple contracts or can be triggered multiple times, if a contract or product can be paused (either through on or off-chain means) only the impact of the first usage will be considered. If a product is not pausable such that there is no realistic way to prevent repeated usage of the attack, the entire amount at risk will be considered when evaluating impact.