USX is a fully collateralized neodollar developed by Scroll, designed to merge the best of traditional finance (TradFi) and decentralized finance (DeFi) to deliver stable, sustainable rewards. 

Manipulation of governance voting result deviating from voted outcome and resulting in a direct change from intended effect of original results

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

Permanent freezing of funds

Protocol insolvency

Theft of unclaimed yield

Permanent freezing of unclaimed yield

Temporary freezing of funds

Block stuffing

Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol)

Unbounded gas consumption

Retrieve sensitive data/files from a running server, such as:
- /etc/shadow
- database passwords
- blockchain keys (this does not include non-sensitive environment variables, open source code, or usernames)

Taking and/modifying authenticated actions (with or without blockchain state interaction) on behalf of other users without any interaction by that user, such as:
- Changing registration information
- Commenting
- Voting
- Making trades
- Withdrawals, etc.

Subdomain takeover with already-connected wallet interaction

Direct theft of user funds

USX Codebase

USX Documentation

__Rewards by Threat Level__

Rewards are distributed according to the impact of the vulnerability based on the [Immunefi Vulnerability Severity Classification System V2.3](https://immunefi.com/immunefi-vulnerability-severity-classification-system-v2-3/). 

__Reward Calculation for Critical Level Reports__

For critical smart contract bugs, the reward amount is 10% of the funds directly affected up to a maximum of USD $100,000. The calculation of the amount of funds at risk is based on the time and date the bug report is submitted. However, a minimum reward of USD $50,000  is to be rewarded in order to incentivize security researchers against withholding a critical bug report.

For critical web/apps bugs, reports will be rewarded a flat amount of $5,000. The rest of the severity levels are paid out according to the Impact in Scope table.

__Repeatable Attack Limitations__

- If the smart contract where the vulnerability exists can be upgraded or paused, only the initial attack will be considered for a reward. 
- The amount of funds at risk will be calculated with the impact of the first attack being at 100% and then a reduction of 25% from the amount of the first attack for every [1800 blocks] the attack needs for subsequent attacks from the first attack, rounded down.


__Reward Calculation for High Level Reports__

High vulnerabilities concerning theft/permanent freezing of unclaimed yield/royalties are rewarded within a range of $5,000 to $10,000 with the reward calculated based on 100% of the funds at risk, though capped at the maximum high reward.

In the event of temporary freezing, the reward doubles from the full frozen value for every additional 24h that the funds are temporarily frozen, up until a max cap of the high reward.


__Reward Payment Terms__

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

The calculation of the net amount rewarded is based on the average price between CoinMarketCap.com and CoinGecko.com at the time the bug report was submitted. No adjustments are made based on liquidity availability.