03 July 2021
Live since
KYC required
Maximum bounty

Program Overview

88mph is a DeFi protocol for providing fixed-term fixed-rate interest. It does so by pooling deposits with differing maturations and fixed-rates together and putting the funds in a yield-generating protocol, such as Compound, Aave, and yEarn, to earn floating-rate interest. The debt incurred by the promised fixed-rate interest of a deposit is offered as floating-rate bonds (or fundings as referred to in the contracts), which someone can purchase in exchange for the floating-rate interest generated by the corresponding deposit. Buyers of floating-rate bonds thus speculate on the floating-rate yield generated by the underlying protocol, while decreasing the debt of the pool and the risk of insolvency.

88mph is interested in securing its V3 smart contracts and is primarily interested in preventing the loss of user funds, permanent impairment of the protocol state, or severe damage to the protocol state, in addition to any issue that might cause user dissatisfaction or minimal failure.

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.

The final payout amount may be affected by the exploitability of the vulnerability. Payouts are handled by 88mph directly and are denominated in USD. However, payouts are done in MPH.

Smart Contracts and Blockchain

USD $100,420.69
USD $21,000
USD $5,000
USD $1,000

Assets in Scope

The Mocks folder is not considered as in-scope of this bug bounty program.

Prioritized Vulnerabilities

We are especially interested in receiving and rewarding vulnerabilities of the following types:

Smart Contracts/Blockchain

  • Re-entrancy
  • Logic errors
    • including user authentication errors
  • Solidity/EVM details not considered
    • including integer over-/under-flow
    • including unhandled exceptions
  • Trusting trust/dependency vulnerabilities
    • including composability vulnerabilities
  • Oracle failure/manipulation
  • Novel governance attacks
  • Economic/financial attacks
    • including flash loan attacks
  • Congestion and scalability
    • including running out of gas
    • including block stuffing
    • including susceptibility to frontrunning
  • Consensus failures
  • Cryptography problems
    • Signature malleability
    • Susceptibility to replay attacks
    • Weak randomness
    • Weak encryption
  • Susceptibility to block timestamp manipulation
  • Missing access controls / unprotected internal or debugging interfaces

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 that rely on social engineering
  • Attacks requiring access to leaked keys/credentials
  • Attacks that rely on spamming
  • Attacks that rely on Denial of Service
  • Any physical attacks against 88mph property or data centers
  • 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 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
  • Disassembly or reverse engineering of binaries for which source code is not published, not including smart contract bytecode
  • Public disclosure of an unpatched vulnerability in an embargoed bounty