Project Background

• This Solidity code defines the TrueUSD (TUSD) token contract, an ERC20-compliant token with additional functionalities such as burning, blacklisting, and proof of reserve. Let’s break down the main components and functionalities:
  • Interfaces:
    • IERC20: Defines the standard ERC20 token interface.
    • ITrueCurrency: Interface for TrueCurrency token functionalities like minting, burning, blacklisting, etc.
    • AggregatorV3Interface: Interface for Chain Link Price Feeds used for proof of reserve.
  • Libraries:
    • SafeMath: Library for safe mathematical operations to prevent overflows and underflows.
    • Address: Library to check if an address is a contract and handle low-level calls.
  • ProxyStorage: Contract to store common state variables and mappings used by proxy contracts.
  • ClaimableOwnable: Contract providing functionality for ownership transfer.
  • ProxyStorage: Contract to store common state variables and mappings used by proxy contracts.
  • ERC20: Abstract contract implementing the ERC20 standard token functionality.
  • ReclaimerToken: Abstract contract extending ERC20 with functionality to reclaim ETH and ERC20 tokens stuck in the contract.
  • BurnableTokenWithBounds: Abstract contract extending ReclaimerToken with functionality for burning tokens within specified bounds.
  • TrueCurrency: Abstract contract extending BurnableTokenWithBounds with additional functionalities like blacklisting, minting, and transferring with specific checks.
  • TrueCurrencyWithProofOfReserve: Abstract contract extending TrueCurrency with proof of reserve functionality. It ensures that token minting is backed by sufficient reserves based on a Chain Link price feed.
  • TrueUSD: The main TrueUSD token contract, implementing the TrueCurrencyWithProofOfReserve contract and specifying the token name, symbol, and decimals.

• The TrueUSD token contract includes features such as blacklisting addresses, burning tokens within specified bounds, and ensuring that token minting is backed by sufficient reserves based on a Chain Link price feed.
• TrueUSD is the top-level ERC20 contract, with features like blacklist and redemption addresses, and a Proof-of-Reserves feed check.
• It is owned by the token controller, responsible for minting and admin.
• The platform tracks coin burning and returns the equivalent amount of money.

Website: tusd.io

Executive Audit Summary

• According to the standard audit assessment, the Customer`s solidity smart contracts are “Secured”.  Also, these contracts contain owner control, which does not make them fully decentralized.
• We used various tools like Slither, Solhint and Remix IDE. At the same time this finding is based on critical analysis of the manual audit.
• We found 0 critical, 0 high, 0 medium,  1 low and 4 very low-level issues.

Audit Report in PDF

Audit Report Flip book