Vanity - Smart Contract Audit Report

Summary

Vanity Audit Report Vanity is a new token with frictionless fee redistribution and liquidity adds.

For this audit, we reviewed the project team's Vanity token contract using code provided to us by the project team.

Notes on the Contracts:
  • The total supply of the token is initially set to 10 billion.
  • No mint or burn functions exist, though the circulating supply can be decreased by sending tokens to the 0x..dead address.
  • Initially, 100% of the total supply will be held by the owner.

  • There is a 4% tax fee, a 2% liquidity fee, a 2% burn fee, and a 2% marketing fee on all transactions.
  • Users who hold tokens will automatically benefit from the frictionless fee redistribution at the time of each transaction as the tokens collected through the tax fee are removed from the circulating supply.
  • The tokens collected through the marketing fee are sent to the marketing wallet controlled by the team.
  • The tokens collected through the burn fee are sent to the burn address.
  • The tokens collected through the liquidity fee are stored in the contract and, once a threshold value of 10 million VNY tokens is met, used to fund Uniswap liquidity; this can be disabled by the owner at any time.
  • Liquidity-adds are funded by selling half of the tokens collected as fees, pairing the received ETH with the token, and adding it as liquidity to the ETH pair.
  • The newly created LP tokens are stored in the owner's wallet address. We recommend that this liquidity is locked at the time of acquisition.
  • There is anti-whale functionality so that any user with more than 80 million VNY tokens may not sell more than 10% of their tokens in a 24 hour period; this does not apply to the owner.
  • There is a maximum transaction amount of 10 million VNY tokens, but this does not apply to the owner during transactions where the owner is either the sender or the recipient; the owner can set the max transaction amount to any value at any time.

  • The owner can set the tax, liquidity, burn, and marketing fees to any value up to 100% at any time; we recommend the project team impose a limit on the value that these fees can be set to.
  • The owner can also exclude anyone from rewards or fees, toggle the swap and liquify functionality, toggle the anti-whale logic, set the whale limit, and set the token threshold required to add liquidity to any value, but can renounce ownership.
  • The owner can set the Uniswap Router address to any address at any time.

  • Some variables could have been delcared constant for extra gas savings.
  • Some functions could have been declared external for extra gas savings.
  • The contract utilizes Solidity v0.8.0 to prevent overflows along with following the ERC20 standard.
Audit Findings Summary
  • No security issues from outside attackers were identified.
  • Ensure trust in the team as they have notable control in the ecosystem and can set fees to 100% of the transaction amount at any time.
  • Date: July 24th, 2021

Audit Results

Vulnerability Category Notes Result
Arbitrary Storage Write N/A PASS
Arbitrary Jump N/A PASS
Delegate Call to Untrusted Contract N/A PASS
Dependence on Predictable Variables N/A PASS
Deprecated Opcodes N/A PASS
Ether Thief N/A PASS
Exceptions N/A PASS
External Calls N/A PASS
Flash Loans N/A PASS
Integer Over/Underflow N/A PASS
Multiple Sends N/A PASS
Oracles N/A PASS
Suicide N/A PASS
State Change External Calls N/A PASS
Unchecked Retval N/A PASS
User Supplied Assertion N/A PASS
Critical Solidity Compiler N/A PASS
Overall Contract Safety   PASS

ERC20 Token Graph

Contract Inheritance


 ($) = payable function
 # = non-constant function
 
 + [Int] IBEP20 
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] transfer #
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transferFrom #

 + [Lib] SafeMath 
    - [Int] add
    - [Int] sub
    - [Int] sub
    - [Int] mul
    - [Int] div
    - [Int] div
    - [Int] mod
    - [Int] mod

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

 + [Lib] Address 
    - [Int] isContract
    - [Int] sendValue #
    - [Int] functionCall #
    - [Int] functionCall #
    - [Int] functionCallWithValue #
    - [Int] functionCallWithValue #
    - [Prv] _functionCallWithValue #

 +  Ownable (Context)
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner
    - [Pub] geUnlockTime
    - [Pub] lock #
       - modifiers: onlyOwner
    - [Pub] unlock #

 + [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] removeLiquidityETHSupportingFeeOnTransferTokens #
    - [Ext] removeLiquidityETHWithPermitSupportingFeeOnTransferTokens #
    - [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
    - [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($)
    - [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens #

 +  VANITY (Context, IBEP20, Ownable)
    - [Pub]  #
    - [Pub] name
    - [Pub] symbol
    - [Pub] decimals
    - [Pub] totalSupply
    - [Pub] balanceOf
    - [Pub] transfer #
    - [Pub] allowance
    - [Pub] approve #
    - [Pub] transferFrom #
    - [Pub] increaseAllowance #
    - [Pub] decreaseAllowance #
    - [Pub] isExcludedFromReward
    - [Pub] totalFees
    - [Pub] reflectionFromToken
    - [Pub] tokenFromReflection
    - [Pub] excludeFromReward #
       - modifiers: onlyOwner
    - [Ext] includeInReward #
       - modifiers: onlyOwner
    - [Pub] excludeFromFee #
       - modifiers: onlyOwner
    - [Pub] includeInFee #
       - modifiers: onlyOwner
    - [Ext] setTaxFeePercent #
       - modifiers: onlyOwner
    - [Ext] setMarketingFeePercent #
       - modifiers: onlyOwner
    - [Ext] setBurnFeePercent #
       - modifiers: onlyOwner
    - [Ext] ChangeMarketingWallet #
       - modifiers: onlyOwner
    - [Ext] AmountPeopleHodl4Sell #
       - modifiers: onlyOwner
    - [Ext] setLiquidityFeePercent #
       - modifiers: onlyOwner
    - [Pub] setRouter #
       - modifiers: onlyOwner
    - [Pub] setSwapAndLiquifyEnabled #
       - modifiers: onlyOwner
    - [Pub] Disable_Enable #
       - modifiers: onlyOwner
    - [Ext] settoken2LP #
       - modifiers: onlyOwner
    - [Ext] setMaxTx #
       - modifiers: onlyOwner
    - [Ext]  ($)
    - [Prv] _reflectFee #
    - [Prv] _getValues
    - [Prv] _getTValues
    - [Prv] _getRValues
    - [Prv] _getRate
    - [Prv] _getCurrentSupply
    - [Prv] _takeLiquidity #
    - [Prv] calculate
    - [Prv] _Wallet #
    - [Prv] calculateTaxFee
    - [Prv] calculateWalletFee
    - [Prv] calculateLiquidityFee
    - [Prv] removeAllFee #
    - [Prv] restoreAllFee #
    - [Pub] isExcludedFromFee
    - [Prv] _approve #
    - [Prv] _transfer #
    - [Prv] swapAndLiquify #
       - modifiers: lockTheSwap
    - [Prv] swapTokensForEth #
    - [Prv] addLiquidity #
    - [Prv] _tokenTransfer #
    - [Prv] _transferStandard #
    - [Prv] _transferToExcluded #
    - [Prv] _transferFromExcluded #
    - [Prv] _transferBothExcluded #