VIVA [Viva Classic] Token

Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)

Reentrancy in VivaClassic._transfer(address,address,uint256) (#865-909):
External calls:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#804)
- _rOwned[_giveawayWalletAddress] = _rOwned[_giveawayWalletAddress].add(rGiveaway) (#812)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1000)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#990)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#991)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1012)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#713)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1002)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1013)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#715)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _rTotal = _rTotal.sub(rFee) (#757)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#806)
- _tOwned[_giveawayWalletAddress] = _tOwned[_giveawayWalletAddress].add(tGiveaway) (#814)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#712)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1011)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1001)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#714)
Apply the check-effects-interactions pattern.

Additional information: link

Contract ownership is not renounced (belongs to a wallet)

VivaClassic.setTaxFeePercent(uint256) (#730-732) should emit an event for:
- _taxFee = taxFee (#731)
VivaClassic.setMaxTxPercent(uint256) (#742-746) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(10 ** 2) (#743-745)
VivaClassic.setGiveawayFeePercent(uint256) (#734-736) should emit an event for:
- _giveawayFee = giveawayFee (#735)
VivaClassic.setLiquidityFeePercent(uint256) (#738-740) should emit an event for:
- _liquidityFee = liquidityFee (#739)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in VivaClassic._transfer(address,address,uint256) (#865-909):
External calls:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _giveawayFee = _previousGiveawayFee (#849)
- _giveawayFee = 0 (#843)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _liquidityFee = _previousLiquidityFee (#850)
- _liquidityFee = 0 (#844)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _previousGiveawayFee = _giveawayFee (#839)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _previousLiquidityFee = _liquidityFee (#840)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _previousTaxFee = _taxFee (#838)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _tFeeTotal = _tFeeTotal.add(tFee) (#758)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- _taxFee = _previousTaxFee (#848)
- _taxFee = 0 (#842)
Reentrancy in VivaClassic.transferFrom(address,address,uint256) (#639-643):
External calls:
- _transfer(sender,recipient,amount) (#640)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
External calls sending eth:
- _transfer(sender,recipient,amount) (#640)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#641)
- _allowances[owner][spender] = amount (#861)
Reentrancy in VivaClassic.swapAndLiquify(uint256) (#911-932):
External calls:
- swapTokensForEth(half) (#923)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
- addLiquidity(otherHalf,newBalance) (#929)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#929)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#929)
- _allowances[owner][spender] = amount (#861)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in VivaClassic.transferFrom(address,address,uint256) (#639-643):
External calls:
- _transfer(sender,recipient,amount) (#640)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
External calls sending eth:
- _transfer(sender,recipient,amount) (#640)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#862)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#641)
Reentrancy in VivaClassic._transfer(address,address,uint256) (#865-909):
External calls:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#896)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
Event emitted after the call(s):
- Transfer(sender,recipient,tTransferAmount) (#995)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- Transfer(sender,recipient,tTransferAmount) (#1006)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- Transfer(sender,recipient,tTransferAmount) (#1017)
- _tokenTransfer(from,to,amount,takeFee) (#908)
- Transfer(sender,recipient,tTransferAmount) (#719)
- _tokenTransfer(from,to,amount,takeFee) (#908)
Reentrancy in VivaClassic.swapAndLiquify(uint256) (#911-932):
External calls:
- swapTokensForEth(half) (#923)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#943-949)
- addLiquidity(otherHalf,newBalance) (#929)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#929)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#862)
- addLiquidity(otherHalf,newBalance) (#929)
- SwapAndLiquify(half,newBalance,otherHalf) (#931)
Apply the check-effects-interactions pattern.

Additional information: link

Address.isContract(address) (#188-197) uses assembly
- INLINE ASM (#195)
Address._verifyCallResult(bool,bytes,string) (#261-278) uses assembly
- INLINE ASM (#270-273)
Do not use evm assembly.

Additional information: link

SafeMath.tryDiv(uint256,uint256) (#118-123) is never used and should be removed
Address.sendValue(address,uint256) (#200-206) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#219-221) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#126-131) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (#253-259) is never used and should be removed
Address.functionDelegateCall(address,bytes) (#248-250) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#88-94) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#175-180) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#224-231) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#167-172) is never used and should be removed
Context._msgData() (#19-22) is never used and should be removed
Address.functionStaticCall(address,bytes) (#234-236) is never used and should be removed
SafeMath.mod(uint256,uint256) (#154-156) is never used and should be removed
Address._verifyCallResult(bool,bytes,string) (#261-278) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#105-115) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#97-102) is never used and should be removed
Address.isContract(address) (#188-197) is never used and should be removed
Address.functionCall(address,bytes,string) (#214-216) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (#239-245) is never used and should be removed
Address.functionCall(address,bytes) (#209-211) is never used and should be removed
Remove unused functions.

Additional information: link

VivaClassic._previousTaxFee (#556) is set pre-construction with a non-constant function or state variable:
- _taxFee
VivaClassic._previousGiveawayFee (#559) is set pre-construction with a non-constant function or state variable:
- _giveawayFee
VivaClassic._previousLiquidityFee (#561) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
VivaClassic._rTotal (#548) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
Remove any initialization of state variables via non-constant state variables or function calls. If variables must be set upon contract deployment, locate initialization in the constructor instead.

Additional information: link

solc-0.8.3 is not recommended for deployment
Pragma version^0.8.3 (#11) allows old versions
Deploy with any of the following Solidity versions: 0.5.16 - 0.5.17, 0.6.11 - 0.6.12, 0.7.5 - 0.7.6 Use a simple pragma version that allows any of these versions. Consider using the latest version of Solidity for testing.

Additional information: link

Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (#224-231):
- (success,returndata) = target.call{value: value}(data) (#229)
Low level call in Address.functionStaticCall(address,bytes,string) (#239-245):
- (success,returndata) = target.staticcall(data) (#243)
Low level call in Address.sendValue(address,uint256) (#200-206):
- (success) = recipient.call{value: amount}() (#204)
Low level call in Address.functionDelegateCall(address,bytes,string) (#253-259):
- (success,returndata) = target.delegatecall(data) (#257)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IUniswapV2Pair.PERMIT_TYPEHASH() (#361) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#378) is not in mixedCase
Parameter VivaClassic.calculateGiveawayFee(uint256)._amount (#823) is not in mixedCase
Variable VivaClassic._maxTxAmount (#569) is not in mixedCase
Variable VivaClassic._giveawayFee (#558) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#360) is not in mixedCase
Variable VivaClassic._taxFee (#555) is not in mixedCase
Parameter VivaClassic.calculateTaxFee(uint256)._amount (#817) is not in mixedCase
Variable VivaClassic._liquidityFee (#560) is not in mixedCase
Parameter VivaClassic.setSwapAndLiquifyEnabled(bool)._enabled (#748) is not in mixedCase
Function IUniswapV2Router01.WETH() (#398) is not in mixedCase
Parameter VivaClassic.calculateLiquidityFee(uint256)._amount (#829) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#20)" inContext (#14-23)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#403) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#404)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._transferToExcluded(address,address,uint256).rTransferAmount (#999) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._transferBothExcluded(address,address,uint256).rTransferAmount (#711) is too similar to VivaClassic._transferBothExcluded(address,address,uint256).tTransferAmount (#711)
Variable VivaClassic._transferFromExcluded(address,address,uint256).rTransferAmount (#1010) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._transferToExcluded(address,address,uint256).tTransferAmount (#999)
Variable VivaClassic._getValues(uint256).rTransferAmount (#763) is too similar to VivaClassic._transferFromExcluded(address,address,uint256).tTransferAmount (#1010)
Variable VivaClassic.reflectionFromToken(uint256,bool).rTransferAmount (#678) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._getTValues(uint256).tTransferAmount (#771)
Variable VivaClassic._transferStandard(address,address,uint256).rTransferAmount (#989) is too similar to VivaClassic._getValues(uint256).tTransferAmount (#762)
Variable VivaClassic._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#780) is too similar to VivaClassic._transferStandard(address,address,uint256).tTransferAmount (#989)
Prevent variables from having similar names.

Additional information: link

VivaClassic.slitherConstructorVariables() (#531-1021) uses literals with too many digits:
- _tTotal = 100000000000 * 10 ** 9 (#547)
VivaClassic.slitherConstructorVariables() (#531-1021) uses literals with too many digits:
- _maxTxAmount = 100000000000 * 10 ** 9 (#569)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

VivaClassic.numTokensSellToAddToLiquidity (#570) should be constant
VivaClassic._tTotal (#547) should be constant
VivaClassic._symbol (#552) should be constant
VivaClassic._decimals (#553) should be constant
VivaClassic._giveawayWalletAddress (#544) should be constant
VivaClassic._name (#551) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

excludeFromFee(address) should be declared external:
- VivaClassic.excludeFromFee(address) (#722-724)
includeInFee(address) should be declared external:
- VivaClassic.includeInFee(address) (#726-728)
isExcludedFromFee(address) should be declared external:
- VivaClassic.isExcludedFromFee(address) (#853-855)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#312-315)
deliver(uint256) should be declared external:
- VivaClassic.deliver(uint256) (#663-670)
approve(address,uint256) should be declared external:
- VivaClassic.approve(address,uint256) (#634-637)
reflectionFromToken(uint256,bool) should be declared external:
- VivaClassic.reflectionFromToken(uint256,bool) (#672-681)
symbol() should be declared external:
- VivaClassic.symbol() (#608-610)
totalSupply() should be declared external:
- VivaClassic.totalSupply() (#616-618)
name() should be declared external:
- VivaClassic.name() (#604-606)
increaseAllowance(address,uint256) should be declared external:
- VivaClassic.increaseAllowance(address,uint256) (#645-648)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#321-325)
isExcludedFromReward(address) should be declared external:
- VivaClassic.isExcludedFromReward(address) (#655-657)
decimals() should be declared external:
- VivaClassic.decimals() (#612-614)
setSwapAndLiquifyEnabled(bool) should be declared external:
- VivaClassic.setSwapAndLiquifyEnabled(bool) (#748-751)
transfer(address,uint256) should be declared external:
- VivaClassic.transfer(address,uint256) (#625-628)
totalFees() should be declared external:
- VivaClassic.totalFees() (#659-661)
excludeFromReward(address) should be declared external:
- VivaClassic.excludeFromReward(address) (#689-696)
allowance(address,address) should be declared external:
- VivaClassic.allowance(address,address) (#630-632)
transferFrom(address,address,uint256) should be declared external:
- VivaClassic.transferFrom(address,address,uint256) (#639-643)
decreaseAllowance(address,uint256) should be declared external:
- VivaClassic.decreaseAllowance(address,uint256) (#650-653)
Use the external attribute for functions never called from the contract.

Additional information: link

VivaClassic.includeInReward(address) (#698-709) has costly operations inside a loop:
- _excluded.pop() (#705)
Use a local variable to hold the loop computation result.

Additional information: link

VivaClassic._approve(address,address,uint256).owner (#857) shadows:
- Ownable.owner() (#299-301) (function)
VivaClassic.allowance(address,address).owner (#630) shadows:
- Ownable.owner() (#299-301) (function)
Rename the local variables that shadow another component.

Additional information: link

VivaClassic.addLiquidity(uint256,uint256) (#952-965) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#957-964)
Ensure that all the return values of the function calls are used.

Additional information: link

Token is deployed only at one blockchain

Average 30d PancakeSwap volume is low.

Average PancakeSwap trading volume, liqudity, number of swaps are low. Token seems to be inactive.

Contract has 6% buy tax and 3% sell tax.
Taxes are low but contract ownership is not renounced. Token has a high risk of becoming a honeypot.

Average 30d PancakeSwap liquidity is low.

Average 30d number of PancakeSwap swaps is low.

Unable to find token contract audit

Token is not listed at Mobula.Finance

Additional information: link

Unable to find Telegram link on the website

Unable to find Twitter link on the website

Unable to find token on CoinHunt

Additional information: link

Unable to find code repository for the project

Unable to find audit link on the website

Unable to find whitepaper link on the website

Young tokens have high risks of price dump / death

Token has relatively low CoinGecko rank