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Balancer

Balancer is a community-driven protocol, liquidity provider, and price sensor that empowers decentralized exchange and the automated portfolio management of tokens on the Ethereum blockchain and other EVM compatible systems.

ETH
Polygon
Defi
AMM
DEX
JavaScript
Solidity
Maximum Bounty
$1,000,000
Live Since
12 May 2022
Last Updated
08 April 2024
  • PoC required

Submit a Bug

Rewards by Threat Level

Smart Contract
Critical
Up to USD $1,000,000
High
Up to USD $250,000
Medium
Up to USD $25,000

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, smart contracts, and blockchains/DLTs, focusing on the impact of the vulnerability reported.

All Critical/High severity 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 PoC and code is required.

Critical smart contract vulnerabilities are further capped at 10% of economic damage, taking into account the funds at risk at the moment of the bug report submission. However, there is a minimum reward of USD 250 000. Additionally, the maximum reward is capped at USD 1 000 000, even if 10% of the damage in USD equivalent is greater than USD 1 000 000.

High severity smart contract vulnerabilities are also further capped at 10% of economic damage, taking into account the funds at risk at the moment of the bug report submission. However, there is a minimum reward of 50 000 USD. Additionally, the maximum reward is capped at USD 250 000, even if 10% of the damage is greater than USD 250 000.

Vulnerabilities involving non-standard ERC20 tokens are considered out of scope, as it would be trivial to insert an exploit into a token for the sake of applying to this bug bounty. A standard, Balancer-compatible ERC20 token is one that conforms to all EIP-20 interfaces and exhibits expected behavior in implementation; i.e., transfers move exactly N tokens from sender to recipient, and balances do not change by any means other than transfers. Notably, tokens with transfer fees, rebasing supplies, streaming mechanics or multiple entrypoints are not compatible with Balancer, but that list is not exhaustive.

Known issues such as those previously highlighted in the following audit report are considered out of scope (list is not exhaustive):

Payouts are handled by the Balancer team directly and are denominated in USD. However, payouts are done in ETH or USDC, at the discretion of the team.

Program Overview

Balancer is a community-driven protocol, liquidity provider, and price sensor that empowers decentralized exchange and the automated portfolio management of tokens on the Ethereum blockchain and other EVM compatible systems.

Balancer Pools contain two or more tokens that traders can swap between. Liquidity Providers put their tokens in the pools in order to collect swap fees.

Balancer adopts powerful features to slash gas costs, super-charge capital efficiency, unlock arbitrage with zero-token starting capital, and open the door to custom AMMs.

For more information about Balancer, please visit https://balancer.fi/.

KYC not required

No KYC information is required 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.