TRON (TRX) Token Smart Contract Audit

Project Background

  • The `TRX` contract is an ERC20 token contract that also implements the `IMintableERC20` interface. Let’s break down its key features and functionalities:
  • Contract Inheritance: It inherits from:
    • ERC20: This is the standard ERC20 token contract implementation providing basic token functionalities.
    • AccessControlMixin: This mixin provides role-based access control functionalities.
    • NativeMetaTransaction: This mixin enables meta-transactions using the EIP712 standard.
  • Constructor: It takes two parameters `name_` and `symbol_` and initializes the ERC20 token with the provided name and symbol.
  • Role Definition: It defines a role named `PREDICATE_ROLE` using the `bytes32` constant.
  • Constructor Initialization:
    • It sets up the contract ID using `_setupContractId`.
    • It sets up the `PREDICATE_ROLE` role for a specific address (likely a bridge or predicate contract).
  • Minting Functionality:
    • It implements the `mint` function from the `IMintableERC20` interface, allowing the designated predicate contract to mint new tokens.
    • The `mint` function is restricted to only be called by an address with the `PREDICATE_ROLE`.
  • Message Sender Override:
    • It overrides the `_msgSender` function from `ContextMixin` to return the actual sender of the message.
  • Overall, this contract represents a token (`TRX`) with minting capabilities restricted to a designated predicate contract. This setup suggests that the token may be used in a sidechain or layer 2 scaling solution where token transfers are facilitated by a predicate contract acting as a bridge between Ethereum and the sidechain/layer 2 networks.


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


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