Quant Token Smart Contract Audit

Project Background

  • This Solidity contract implements a standard ERC20 token with additional functionality for a crowdsale. Let’s break it down:
  • ERC20Basic:
    • Interface defining essential ERC20 functions: `totalSupply()`, `balanceOf()`, and `transfer()`.
    • It emits a `Transfer` event upon successful token transfer.
  • SafeMath Library:
    • A library providing arithmetic functions with safety checks to prevent overflow and underflow.
  • BasicToken:
    • Inherits from ERC20Basic and uses SafeMath library.
    • Implements the `totalSupply()` and `balanceOf()` functions.
    • Implements the `transfer()` function with safety checks for valid addresses and sufficient balance.
    • The total supply is initialized to a fixed value of 45,467,000 QNT tokens.
  • ERC20 Interface:
    • An interface extending ERC20Basic with additional functions: `allowance()`, `transferFrom()`, and `approve()`.
    • It emits an `Approval` event upon successful approval.
  • StandardToken:
    • Inherits from ERC20 and BasicToken.
    • Implements additional functionalities such as `approve()`, `allowance()`, `transferFrom()`, `increaseApproval()`, and `decreaseApproval()`.
    • Defines constants for token name, symbol, and decimals.
    • Defines a `crowdsale` address and a modifier `onlyCrowdsale` to restrict certain functions to the crowdsale contract.
    • Implements a `mint()` function that allows the crowdsale contract to mint tokens to specific addresses.
    • Overrides the `transferFrom()` function with additional safety checks for valid addresses, sufficient balance, and allowance.
    • Implements the `approve()` function to allow the spender to spend the specified amount on behalf of the owner.
    • Implements `increaseApproval()` and `decreaseApproval()` functions to atomically increase or decrease the allowance.
  • Overall, this contract provides a standard ERC20 token functionality with additional features such as minting and allowance manipulation, along with safety checks to prevent common vulnerabilities like overflow and underflow.

Website: quant.network

Executive Audit Summary

  • According to the standard audit assessment, the Customer`s solidity smart contracts are “Secured”.  This token contract does not have any ownership control, hence it is 100% 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,  0 low and 7 very low-level issues.

Audit Report in PDF


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