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02 July 2021
Live since
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Maximum bounty

Program Overview

AMPL is the first rebasing currency and a key DeFi building block for denominating stable contracts. The AMPL protocol adjusts total supply daily based on market conditions, transferring volatility from price to supply. Like Bitcoin, AMPL’s elastic supply policy does not rely on traditional banks or lenders of last resort. Because of this unique approach, AMPL can be used as a true unit of account to denominate smart contracts.

The aAMPL token, a custom aToken on Aave, is planned to be entered into polling with the goal of being integrated into the Aave ecosystem, and was formally submitted as AIP37.

Further resources regarding Ampleforth can be found on their website,

The bug bounty program is focused around its smart contracts and is mostly concerned with:

  • The loss of user AMPL deposits
  • Theft of unclaimed yield
  • Freezing of AMPL on Aave for 1 hour or longer

Rewards by Threat Level

Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System. 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.

Only vulnerabilities that are directly affecting aAMPL and the yield generated from aAMPL are considered under this bug bounty program. For example, if yield can be stolen from staking of other aTokens, they will not be considered for a reward.

Payouts up to USD 50 000 are handled by the Ampleforth team directly and are denominated in USD. However, payouts are done in ETH, USDT, USDC, or AMPL, at the discretion of the team.

Smart Contract

USD $50,000
USD $10,000

Assets in scope

Vulnerabilities on Aave itself as well as natively on Ampleforth are not covered and are not accepted under this bug bounty program.

Impacts in scope

Only the following impacts are accepted within this bug bounty program. All other impacts are not considered as in-scope, even if they affect something in the assets in scope table.

Smart Contract

  • Critical Smart Contract Impact
  • High Smart Contract Impact

Out of Scope & Rules

The following vulnerabilities are excluded from the rewards for this bug bounty program:

  • Attacks that the reporter has already exploited themselves, leading to damage
  • Attacks requiring access to leaked keys/credentials
  • Attacks requiring access to privileged addresses (governance, strategist)
  • Incorrect data supplied by third party oracles
    • Not to exclude oracle manipulation/flash loan attacks
  • Basic economic governance attacks (e.g. 51% attack)
  • Lack of liquidity
  • Best practice critiques
  • Sybil attacks

The following activities are prohibited by this bug bounty program:

  • Any testing with mainnet or public testnet contracts; all testing should be done on private testnets
  • 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
  • Automated testing of services that generates significant amounts of traffic
  • Public disclosure of an unpatched vulnerability in an embargoed bounty