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Superfluid

Superfluid is an asset streaming protocol that has the power to describe cash flows and execute them automatically on-chain over time in a non-interactive way. Superfluid streams are programmable, composable, and modular. The first cash flow type allows constant streams of value and one-to-many distributions. All streams are settled at the same time, based on block timestamps.

Polygon
Defi
Services
JavaScript
Solidity
Maximum Bounty
$200,000
Live Since
10 February 2022
Last Updated
03 June 2024
  • PoC required

  • KYC required

Submit a Bug

Rewards by Threat Level

Smart Contract
Critical
USD $50,000 to USD $200,000
High
USD $10,000 to USD $50,000

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 and smart contracts/blockchains, encompassing everything from consequence of exploitation to privilege required to likelihood of a successful exploit.

Critical/High smart contract 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 PoC and code is required.

This program has the following severity classification and reward structure. In cases where this conflicts with Immunefi’s own classification system, the structure below will be followed.

Critical: Reward - USD 50 000 - USD 200 000

  • A reproducible vulnerability discovered in the core protocol that can be exploited by anyone that results in the loss of a portion or all user funds in the Superfluid protocol:
    • Critical bug which results in the drainage of all user funds (USD 200 000).
    • Critical bug which results in the drainage of a portion of user funds (USD 50 000 + 15% of user funds at risk or stuck, up to USD 200 000).

High: Reward - USD 10 000 - USD 50 000

  • A reproducible bug by anyone that results in the core protocol not functioning properly where funds are stuck. If funds are stuck: you get a base reward of USD 10 000 + 15% of the total amount of funds that are stuck.
    • If not reproducible (requires special conditions which can’t be affected by anyone): USD 10 000 + 7.5% of the total amount of funds that are stuck

The following known issues are considered to be out of scope:

  • Gas griefing specifically by spam attacks
  • Gas griefing specifically in SuperApp termination callbacks

Rewards for critical vulnerabilities are further capped at 15% of economic damage, with the main consideration being the funds affected in addition to PR and brand considerations, at the discretion of the team. However, there is a minimum reward of USD 50 000 for Critical bug reports.

Superfluid requires bug bounty hunters to pass a successful KYC screening in order to be eligible for rewards. By submitting a report, bug bounty hunters agree to share the following information: Name, Surname, Address, Citizenship Country, and Wallet Address. The collection of this information will be done by Superfluid Finance Ltd.

Payouts are handled by Superfluid directly and are denominated in USD. However, payouts are done in USDC.

Program Overview

Superfluid is an asset streaming protocol that has the power to describe cash flows and execute them automatically on-chain over time in a non-interactive way. Superfluid streams are programmable, composable, and modular. The first cash flow type allows constant streams of value and one-to-many distributions. All streams are settled at the same time, based on block timestamps. Almost no capital is locked up, and all inflows and outflows are netted in real-time, drastically increasing capital efficiency. With a single on-chain transaction, the money will flow from your wallet to the receiver in real-time! No further transactions are required.

Superfluid enables:

  • Real money streaming - constant token flows on-chain with no capital lockups.
  • Rewards distributions - Fixed cost distribution in a single transaction for any number of receivers.
  • Anything you can imagine - Superfluid is a flexible developer toolbox to build entirely new applications.

For more information about Superfluid, please visit https://docs.superfluid.finance/.

This bug bounty program is focused on their smart contracts and is focused on preventing:

  • Superfluid framework bugs
  • Bugs in CFA/IDA/GDA (see https://docs.superfluid.finance/) in general
    • Anything that would prevent streams from being closed
    • Anything that would result in the sum of all account balances drifting significantly from the total supply
  • Theft of tokens in third-party wrapper contracts
  • Other unexpected behaviour in any of their token contracts

KYC required

The submission of KYC information is a requirement for payout processing.

Prohibited Activities

Default prohibited activities
  • Any testing on mainnet or public testnet deployed code; all testing should be done on local-forks of either public testnet or mainnet
  • Any testing with pricing oracles or third-party smart contracts
  • Attempting phishing or other social engineering attacks against our employees and/or customers
  • Any testing with third-party systems and applications (e.g. browser extensions) as well as websites (e.g. SSO providers, advertising networks)
  • Any denial of service attacks that are executed against project assets
  • Automated testing of services that generates significant amounts of traffic
  • Public disclosure of an unpatched vulnerability in an embargoed bounty
  • Any other actions prohibited by the Immunefi Rules

Feasibility Limitations

The project may be receiving reports that are valid (the bug and attack vector are real) and cite assets and impacts that are in scope, but there may be obstacles or barriers to executing the attack in the real world. In other words, there is a question about how feasible the attack really is. Conversely, there may also be mitigation measures that projects can take to prevent the impact of the bug, which are not feasible or would require unconventional action and hence, should not be used as reasons for downgrading a bug's severity. Therefore, Immunefi has developed a set of feasibility limitation standards which by default states what security researchers, as well as projects, can or cannot cite when reviewing a bug report.