VOYR - Smart Contract Audit Report

Summary

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 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

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

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Solidity Finance

VOYR - Smart Contract Audit Report

Summary

External Threat Results

Function Graph

Inheritence Chart

Functions Overview