VOYR - Smart Contract Audit Report

Summary

VOYR Audit Report VOYR is a new token with frictionless fee redistribution and charity contribution on each transfer.

We audited VOYR's token contract at 0x22e6e752d81c8a66fb2bd981e6373b8c41aa8030 on the Binance Smart Chain mainnet.

Overview of the Contract:
  • The total supply of the token is set to 1 trillion.
  • No mint functions are present. A burn function allows the team to burn tokens in the their control.
  • ~50% of the token's supply has been burned.
  • ~44%% of the token's supply is held in the four Gnosis safe contract-wallets.
  • The next largest holder has 1.4.%

  • This contract allows users to purchase tokens at a pre-determined price.
  • Users can only particiipate once in the presale.
  • Sold tokens come from the owner's (team's) address.
  • Users who purchase tokens will pay in BNB and immediately recieve locked tokens upon payment.
  • Locked tokens will slowly become unlocked over time.
  • The team can update the token's purchase price and withdraw unpurchased tokens from the contract any time time.
  • The owner can enable and disable the sale at any time and provide locked tokens manually to users.

  • Users who hold tokens will automatically receive a portion the fees from a transaction tax on each transfer.
  • Another portion of the fees will be sent to the charity wallet.
  • A third portion of the fee will be sent to the 'operations wallet'.
  • The final portion of the fee charged on transactions is stored in the contract and, once a threshold value is met, used to fund PancakeSwap liqudity.
  • Liquidity-adds are funded by selling half of the tokens collected as fees, pairing the received BNB with the token, and adding it as liquidity to the BNB pair.
  • There is a transfer limit on the number of tokens which can be sent in a transaction which can be updated by the owner to any value.
  • The owner can update the tax rates to any amount at any time and exclude / include users from transfer fees.
  • The owner can also withdraw any BNB in the contract.
  • Some functions could have been declared external instead of public to save some gas, but as this is already deployed this is merely informational.
  • The contract utilizes Solidity 0.8.4 to prevent overflow issues.

Audit Findings Summary
  • No security issues were identified in our analysis.
  • Ensure trust in the team as they have substantial control in the ecosystem and hold a portion of the supply.
  • Date: June 1st, 2021

External Threat Results

Vulnerability CategoryNotesResult
Arbitrary Storage WriteN/APASS
Arbitrary JumpN/APASS
Delegate Call to Untrusted ContractN/APASS
Dependence on Predictable VariablesN/APASS
Deprecated OpcodesN/APASS
Ether ThiefN/APASS
ExceptionsN/APASS
External CallsN/APASS
Flash LoansN/APASS
Integer Over/UnderflowN/APASS
Multiple SendsN/APASS
OraclesN/APASS
SuicideN/APASS
State Change External CallsN/APass
Unchecked RetvalN/APASS
User Supplied AssertionN/APASS
Critical Solidity CompilerN/APASS
Overall Contract Safety PASS

BEP20 Token Graph

Multi-file Token

												
($) = payable function
 # = non-constant function
 
 + [Int] IERC20 
    - [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]  #
    - [Pub] owner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner
    - [Pub] geUnlockTime
    - [Pub] lock #
       - modifiers: onlyOwner
    - [Pub] unlock #

 + [Int] IPancakeSwapV2Factory 
    - [Ext] feeTo
    - [Ext] feeToSetter
    - [Ext] getPair
    - [Ext] allPairs
    - [Ext] allPairsLength
    - [Ext] createPair #
    - [Ext] setFeeTo #
    - [Ext] setFeeToSetter #

 + [Int] IPancakeSwapV2Pair 
    - [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] IPancakeSwapV2Router01 
    - [Ext] factory
    - [Ext] WETH
    - [Ext] addLiquidity #
    - [Ext] addLiquidityBNB ($)
    - [Ext] removeLiquidity #
    - [Ext] removeLiquidityBNB #
    - [Ext] removeLiquidityWithPermit #
    - [Ext] removeLiquidityBNBWithPermit #
    - [Ext] swapExactTokensForTokens #
    - [Ext] swapTokensForExactTokens #
    - [Ext] swapExactBNBForTokens ($)
    - [Ext] swapTokensForExactBNB #
    - [Ext] swapExactTokensForBNB #
    - [Ext] swapBNBForExactTokens ($)
    - [Ext] quote
    - [Ext] getAmountOut
    - [Ext] getAmountIn
    - [Ext] getAmountsOut
    - [Ext] getAmountsIn

 + [Int] IPancakeSwapV2Router02 (IPancakeSwapV2Router01)
    - [Ext] removeLiquidityBNBSupportingFeeOnTransferTokens #
    - [Ext] removeLiquidityBNBWithPermitSupportingFeeOnTransferTokens #
    - [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
    - [Ext] swapExactBNBForTokensSupportingFeeOnTransferTokens ($)
    - [Ext] swapExactTokensForBNBSupportingFeeOnTransferTokens #

 +  VOYR_Token (Context, IERC20, 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] toggleSafeSale #
       - modifiers: onlyOwner
    - [Pub] getLockedWalletDetails
    - [Prv] getTokenLockAccessible
    - [Prv] getTokenLockAmount
    - [Pub] acceptPresaleUnlockPayment ($)
    - [Pub] acceptPresalePayment ($)
    - [Pub] manualPresaleAssignment #
       - modifiers: onlyOwner
    - [Pub] assignManualLock #
       - modifiers: onlyOwner
    - [Prv] assignTokenLock #
    - [Pub] getTokenLockAddresses
    - [Pub] checkWalletPresaleUnlock
    - [Pub] getPresaleDetails
    - [Pub] reflectionFromToken
    - [Pub] tokenFromReflection
    - [Pub] excludeFromReward #
       - modifiers: onlyOwner
    - [Ext] includeInReward #
       - modifiers: onlyOwner
    - [Pub] excludeFromFee #
       - modifiers: onlyOwner
    - [Pub] includeInFee #
       - modifiers: onlyOwner
    - [Pub] isExcludedFromFee
    - [Ext] setTaxFeePercent #
       - modifiers: onlyOwner
    - [Ext] setLiquidityFeePercent #
       - modifiers: onlyOwner
    - [Ext] setOperationsFeePercent #
       - modifiers: onlyOwner
    - [Ext] setOperationsWallet #
       - modifiers: onlyOwner
    - [Ext] setCharityFeePercent #
       - modifiers: onlyOwner
    - [Ext] setCharityWallet #
       - modifiers: onlyOwner
    - [Ext] setMaxTxPercent #
       - modifiers: onlyOwner
    - [Pub] setSwapAndLiquifyEnabled #
       - modifiers: onlyOwner
    - [Ext]  ($)
    - [Prv] _reflectFee #
    - [Prv] _takeOperationsFee #
    - [Prv] _takeCharityFee #
    - [Prv] _getValues
    - [Prv] _getTValues
    - [Prv] _getRValues
    - [Prv] _getRate
    - [Prv] _getCurrentSupply
    - [Prv] _takeLiquidity #
    - [Prv] removeAllFee #
    - [Prv] restoreAllFee #
    - [Prv] _approve #
    - [Prv] _transfer #
    - [Prv] _tokenTransfer #
    - [Prv] _transferStandard #
    - [Prv] _transferToExcluded #
    - [Prv] _transferBothExcluded #
    - [Prv] _transferFromExcluded #
    - [Prv] swapAndLiquify #
       - modifiers: lockTheSwap
    - [Prv] swapTokensForBNB #
    - [Prv] addLiquidity #
    - [Pub] withdraw #
       - modifiers: onlyOwner
    - [Pub] burn #
       - modifiers: onlyOwner