qqonline / USR

USDx Saving Protocol

Audit Scope

The audit scope is the core logic of USR token and its proxy contract.

• Includes:

  1. The following processes and reference functions in ./contracts/USR.sol:

     • Mint: saving USDx and get USR token

     • Burn/Withdraw: redeem USDx by repaying USR token

     Notice: Some basic functions are not include in audit scope.

  2. The implementation of proxy function in ./contracts/USRProxy.sol

• Excludes:

  1. All functions and condition judgements that do not exist in ./contracts/USR.sol.

  2. All mathematical functions:

     • function rpow(uint x, uint n, uint base)
     • function rmul(uint x, uint y)
     • function rdiv(uint x, uint y)
     • function rdivup(uint x, uint y)
     • function mulScale(uint x, uint y)
     • function divScale(uint x, uint y)