NFTC

Smart Contract Audit Report

Audit Summary

NFTC Audit Report NFTC is an ERC-20 token with automated swapback functionality.

For this audit, we reviewed the project team's NFTC contract at 0x563b7b186dd21b320d8f721c971b40b3d6d36113 on the Binance Smart Chain Mainnet.

Audit Findings

No findings were identified, though some centralized aspects are present.
Date: October 18th, 2023.

Contract Overview

  • This contract defines the NFTC token.
  • The total supply of NFTC tokens is 810,000,000.
  • At the time of writing this report, there are 1,415 total token holders. The token allocation is as follows:
    • 72.54% is owned by an EOA.
    • 12.50% is owned by an another EOA.
    • 3.0% is owned by a final EOA.
  • Users not excluded from fees may not transfer tokens when tradings is not enabled.
  • A fee is taken on buys and sells.
  • During transfers, if the contract's balance has met a threshold, the transfer is not a purchase, the sender and recipient are not exempt from fees, and the swapping functionality is enabled, a "swapback" will be performed.
  • The contract's token balance is used to swap for ETH which is subsequently sent to the MarketingWallet address.
  • The amount of tokens used to swap is capped at 20 times the swap threshold.
  • Addresses on the multi transfer list may send tokens up to 500 addresses without fees.
  • The owner may set a new Router address at any time. A new WETH pair will be created if one does not already exist.
  • The owner may enable and disable trading and swapback functionality at any time.
  • The owner may set the swap at threshold between 0.001% and 0.5% of the token's total supply.
  • The owner may set the buy and sell fees up to 10% at any time.
  • The owner may add and remove an address to the multi transfer list at any time.
  • The owner may add and remove an address from the AMM list at any time.
  • The owner may set the MarketingWallet address at any time.
  • The owner may exclude any address from fees at any time.
  • The owner may withdraw any tokens from the contract at any time.

Audit Results

Vulnerability Category Notes Result
Arbitrary Jump/Storage Write N/A PASS
Centralization of Control
  • The owner may withdraw any tokens from the contract.
  • The owner may set buy and sell fees up to 10%.
  • A large percentage of the total token supply is owned by one address.
 WARNING
Compiler Issues N/A PASS
Delegate Call to Untrusted Contract N/A PASS
Dependence on Predictable Variables N/A PASS
Ether/Token Theft N/A PASS
Flash Loans N/A PASS
Front Running N/A PASS
Improper Events N/A PASS
Improper Authorization Scheme N/A PASS
Integer Over/Underflow N/A PASS
Logical Issues N/A PASS
Oracle Issues N/A PASS
Outdated Compiler Version N/A PASS
Race Conditions N/A PASS
Reentrancy N/A PASS
Signature Issues N/A PASS
Sybil Attack N/A PASS
Unbounded Loops N/A PASS
Unused Code N/A PASS
Overall Contract Safety   PASS

Inheritance Chart

Smart Contract Audit - Inheritance

Function Graph

Smart Contract Audit - Graph

Functions Overview


 ($) = payable function
 # = non-constant function
 
 Int = Internal
 Ext = External
 Pub = Public

 +  Context 
    - [Int] _msgSender
    - [Int] _msgData

 +  Ownable (Context)
    - [Pub] Constructor #
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner
    - [Int] _transferOwnership #

 + [Int] IERC20 
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] transfer #
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transferFrom #

 + [Int] IERC20Metadata (IERC20)
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals

 +  ERC20 (Context, IERC20, IERC20Metadata)
    - [Pub] Constructor #
    - [Pub] name
    - [Pub] symbol
    - [Pub] decimals
    - [Pub] totalSupply
    - [Pub] balanceOf
    - [Pub] transfer #
    - [Pub] allowance
    - [Pub] approve #
    - [Pub] transferFrom #
    - [Pub] increaseAllowance #
    - [Pub] decreaseAllowance #
    - [Int] _transfer #
    - [Int] _mint #
    - [Int] _burn #
    - [Int] _approve #
    - [Int] _beforeTokenTransfer #
    - [Int] _afterTokenTransfer #

 + [Lib] SafeMath 
    - [Int] tryAdd
    - [Int] trySub
    - [Int] tryMul
    - [Int] tryDiv
    - [Int] tryMod
    - [Int] add
    - [Int] sub
    - [Int] mul
    - [Int] div
    - [Int] mod
    - [Int] sub
    - [Int] div
    - [Int] mod

 + [Int] IUniswapV2Factory 
    - [Ext] feeTo
    - [Ext] feeToSetter
    - [Ext] getPair
    - [Ext] allPairs
    - [Ext] allPairsLength
    - [Ext] createPair #
    - [Ext] setFeeTo #
    - [Ext] setFeeToSetter #

 + [Int] IUniswapV2Pair 
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transfer #
    - [Ext] transferFrom #
    - [Ext] DOMAIN_SEPARATOR
    - [Ext] PERMIT_TYPEHASH
    - [Ext] nonces
    - [Ext] permit #
    - [Ext] MINIMUM_LIQUIDITY
    - [Ext] factory
    - [Ext] token0
    - [Ext] token1
    - [Ext] getReserves
    - [Ext] price0CumulativeLast
    - [Ext] price1CumulativeLast
    - [Ext] kLast
    - [Ext] mint #
    - [Ext] burn #
    - [Ext] swap #
    - [Ext] skim #
    - [Ext] sync #
    - [Ext] initialize #

 + [Int] IUniswapV2Router01 
    - [Ext] factory
    - [Ext] WETH
    - [Ext] addLiquidity #
    - [Ext] addLiquidityETH ($)
    - [Ext] removeLiquidity #
    - [Ext] removeLiquidityETH #
    - [Ext] removeLiquidityWithPermit #
    - [Ext] removeLiquidityETHWithPermit #
    - [Ext] swapExactTokensForTokens #
    - [Ext] swapTokensForExactTokens #
    - [Ext] swapExactETHForTokens ($)
    - [Ext] swapTokensForExactETH #
    - [Ext] swapExactTokensForETH #
    - [Ext] swapETHForExactTokens ($)
    - [Ext] quote
    - [Ext] getAmountOut
    - [Ext] getAmountIn
    - [Ext] getAmountsOut
    - [Ext] getAmountsIn

 + [Int] IUniswapV2Router02 (IUniswapV2Router01)
    - [Ext] factory
    - [Ext] WETH
    - [Ext] addLiquidity #
    - [Ext] addLiquidityETH ($)
    - [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
    - [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($)
    - [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens #

 +  NFTC (ERC20, Ownable)
    - [Pub] Constructor #
       - modifiers: ERC20
    - [Ext] Receive Ether ($)
    - [Ext] setRouterAddress #
       - modifiers: onlyOwner
    - [Ext] startTrading #
       - modifiers: onlyOwner
    - [Ext] updateSwapTokensAtAmount #
       - modifiers: onlyOwner
    - [Ext] updateSwapEnabled #
       - modifiers: onlyOwner
    - [Pub] removeAllFee #
       - modifiers: onlyOwner
    - [Ext] setBuyFees #
       - modifiers: onlyOwner
    - [Ext] setSellFees #
       - modifiers: onlyOwner
    - [Pub] changeAuthorizedMulti #
       - modifiers: onlyOwner
    - [Pub] excludeFromFees #
       - modifiers: onlyOwner
    - [Pub] setAutomatedMarketMakerPair #
       - modifiers: onlyOwner
    - [Prv] _setAutomatedMarketMakerPair #
    - [Ext] setMarketingWallet #
       - modifiers: onlyOwner
    - [Pub] isExcludedFromFees
    - [Int] _transfer #
    - [Prv] swapTokensForEth #
    - [Prv] swapBack #
    - [Ext] recoverERC20 #
       - modifiers: onlyOwner
    - [Ext] multiTransfer #
    - [Ext] getData

About SourceHat

SourceHat has quickly grown to have one of the most experienced and well-equipped smart contract auditing teams in the industry. Our team has conducted 1800+ solidity smart contract audits covering all major project types and protocols, securing a total of over $50 billion U.S. dollars in on-chain value!
Our firm is well-reputed in the community and is trusted as a top smart contract auditing company for the review of solidity code, no matter how complex. Our team of experienced solidity smart contract auditors performs audits for tokens, NFTs, crowdsales, marketplaces, gambling games, financial protocols, and more!

Contact us today to get a free quote for a smart contract audit of your project!

What is a SourceHat Audit?

Typically, a smart contract audit is a comprehensive review process designed to discover logical errors, security vulnerabilities, and optimization opportunities within code. A SourceHat Audit takes this a step further by verifying economic logic to ensure the stability of smart contracts and highlighting privileged functionality to create a report that is easy to understand for developers and community members alike.

How Do I Interpret the Findings?

Each of our Findings will be labeled with a Severity level. We always recommend the team resolve High, Medium, and Low severity findings prior to deploying the code to the mainnet. Here is a breakdown on what each Severity level means for the project:

  • High severity indicates that the issue puts a large number of users' funds at risk and has a high probability of exploitation, or the smart contract contains serious logical issues which can prevent the code from operating as intended.
  • Medium severity issues are those which place at least some users' funds at risk and has a medium to high probability of exploitation.
  • Low severity issues have a relatively minor risk association; these issues have a low probability of occurring or may have a minimal impact.
  • Informational issues pose no immediate risk, but inform the project team of opportunities for gas optimizations and following smart contract security best practices.