DVSB [Devil Shiba] Token

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

SDVToken.defaultTransfer(address,address,uint256) (contracts/SDVToken.sol#436-447) contains a tautology or contradiction:
- require(bool,string)(amount >= 0,ERC20: transfer amount must larger than 0) (contracts/SDVToken.sol#440)
Fix the incorrect comparison by changing the value type or the comparison.

Additional information: link

SDVToken.slitherConstructorVariables() (contracts/SDVToken.sol#199-531) uses literals with too many digits:
- deadAddress = 0x000000000000000000000000000000000000dEaD (contracts/SDVToken.sol#221)
SDVToken.slitherConstructorVariables() (contracts/SDVToken.sol#199-531) uses literals with too many digits:
- airdropToken = 1500000 * 10 ** 18 (contracts/SDVToken.sol#236)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

SDVToken.buyPresale() (contracts/SDVToken.sol#344-354) performs a multiplication on the result of a division:
-_numberOfTokens = msg.value.div(presalePrice).mul(10 ** 18) (contracts/SDVToken.sol#345)
Consider ordering multiplication before division.

Additional information: link

SDVToken.addLiquidity(uint256,uint256) (contracts/SDVToken.sol#471-484) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/SDVToken.sol#476-483)
Ensure that all the return values of the function calls are used.

Additional information: link

SDVToken.getPresaleLockAmount(address)._owner (contracts/SDVToken.sol#263) shadows:
- Ownable._owner (@openzeppelin/contracts/access/Ownable.sol#21) (state variable)
Rename the local variables that shadow another component.

Additional information: link

SDVToken.setPresalePrice(uint256) (contracts/SDVToken.sol#271-273) should emit an event for:
- presalePrice = _price (contracts/SDVToken.sol#272)
SDVToken.setMaxTxAmount(uint256) (contracts/SDVToken.sol#279-281) should emit an event for:
- maxTxAmount = _maxTxAmount (contracts/SDVToken.sol#280)
SDVToken.setTaxFee(uint256) (contracts/SDVToken.sol#295-297) should emit an event for:
- taxFee = _fee (contracts/SDVToken.sol#296)
SDVToken.setLiquidityFee(uint256) (contracts/SDVToken.sol#298-300) should emit an event for:
- liquidityFee = _fee (contracts/SDVToken.sol#299)
SDVToken.setBuyTaxFee(uint256) (contracts/SDVToken.sol#301-303) should emit an event for:
- buyTaxFee = _fee (contracts/SDVToken.sol#302)
SDVToken.setSellTaxFee(uint256) (contracts/SDVToken.sol#304-306) should emit an event for:
- sellTaxFee = _fee (contracts/SDVToken.sol#305)
SDVToken.setMarketingDivisor(uint256) (contracts/SDVToken.sol#307-309) should emit an event for:
- marketingDivisor = _fee (contracts/SDVToken.sol#308)
SDVToken.setBurnFee(uint256) (contracts/SDVToken.sol#310-312) should emit an event for:
- burnFee = _fee (contracts/SDVToken.sol#311)
SDVToken.setAirdropEth(uint256) (contracts/SDVToken.sol#322-324) should emit an event for:
- airdropEth = _amount (contracts/SDVToken.sol#323)
SDVToken.setAirdropToken(uint256) (contracts/SDVToken.sol#328-330) should emit an event for:
- airdropToken = _amount (contracts/SDVToken.sol#329)
SDVToken.setReferETH(uint256) (contracts/SDVToken.sol#331-333) should emit an event for:
- _referEth = _amount (contracts/SDVToken.sol#332)
SDVToken.setReferToken(uint256) (contracts/SDVToken.sol#334-336) should emit an event for:
- _referToken = _amount (contracts/SDVToken.sol#335)
Emit an event for critical parameter changes.

Additional information: link

SDVToken.setMaketingAddress(address)._address (contracts/SDVToken.sol#316) lacks a zero-check on :
- maketingAddress = _address (contracts/SDVToken.sol#317)
Check that the address is not zero.

Additional information: link

Reentrancy in SDVToken.constructor() (contracts/SDVToken.sol#248-261):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (contracts/SDVToken.sol#250-251)
State variables written after the call(s):
- _mint(_msgSender(),100 * 10 ** 9 * 10 ** 18) (contracts/SDVToken.sol#253)
- _balances[account] += amount (contracts/ERC20.sol#263)
- _mint(_msgSender(),100 * 10 ** 9 * 10 ** 18) (contracts/SDVToken.sol#253)
- _totalSupply += amount (contracts/ERC20.sol#262)
- _totalSupply = 2100 * 10 ** 9 * 10 ** 18 (contracts/SDVToken.sol#259)
- isExcludedFromFee[_msgSender()] = true (contracts/SDVToken.sol#254)
- isExcludedFromFee[address(this)] = true (contracts/SDVToken.sol#255)
- isExcludedReward[address(this)] = true (contracts/SDVToken.sol#256)
- isExcludedReward[_msgSender()] = true (contracts/SDVToken.sol#257)
- maketingAddress = _msgSender() (contracts/SDVToken.sol#258)
- uniswapV2Router = _uniswapV2Router (contracts/SDVToken.sol#252)
Reentrancy in SDVToken.processLiquidityFee() (contracts/SDVToken.sol#461-469):
External calls:
- swapTokensForEth(amount) (contracts/SDVToken.sol#465)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/SDVToken.sol#494-500)
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/SDVToken.sol#476-483)
External calls sending eth:
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/SDVToken.sol#476-483)
State variables written after the call(s):
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
- _allowances[owner][spender] = amount (contracts/ERC20.sol#318)
Apply the check-effects-interactions pattern.

Additional information: link

SDVToken.refer (contracts/SDVToken.sol#241) is never used in SDVToken (contracts/SDVToken.sol#199-531)
Remove unused state variables.

Additional information: link

Reentrancy in SDVToken.constructor() (contracts/SDVToken.sol#248-261):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (contracts/SDVToken.sol#250-251)
Event emitted after the call(s):
- Transfer(address(0),account,amount) (contracts/ERC20.sol#264)
- _mint(_msgSender(),100 * 10 ** 9 * 10 ** 18) (contracts/SDVToken.sol#253)
- Transfer(address(0),_msgSender(),100 * 10 ** 9 * 10 ** 18) (contracts/SDVToken.sol#260)
Reentrancy in SDVToken.processLiquidityFee() (contracts/SDVToken.sol#461-469):
External calls:
- swapTokensForEth(amount) (contracts/SDVToken.sol#465)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/SDVToken.sol#494-500)
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/SDVToken.sol#476-483)
External calls sending eth:
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/SDVToken.sol#476-483)
Event emitted after the call(s):
- Approval(owner,spender,amount) (contracts/ERC20.sol#319)
- addLiquidity(amount,balanceReceived) (contracts/SDVToken.sol#468)
Reentrancy in SDVToken.swapTokensForEth(uint256) (contracts/SDVToken.sol#486-503):
External calls:
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/SDVToken.sol#494-500)
Event emitted after the call(s):
- SwapTokensForETH(tokenAmount,path) (contracts/SDVToken.sol#502)
Apply the check-effects-interactions pattern.

Additional information: link

Address.verifyCallResult(bool,bytes,string) (@openzeppelin/contracts/utils/Address.sol#201-221) uses assembly
- INLINE ASM (@openzeppelin/contracts/utils/Address.sol#213-216)
Do not use evm assembly.

Additional information: link

SDVToken._transfer(address,address,uint256) (contracts/SDVToken.sol#370-434) compares to a boolean constant:
-isExcludedReward[from] == false && isHolder[from] == true && balanceOf(from) == 0 (contracts/SDVToken.sol#426)
SDVToken._transfer(address,address,uint256) (contracts/SDVToken.sol#370-434) compares to a boolean constant:
-isExcludedReward[to] == false && isHolder[to] == false (contracts/SDVToken.sol#429)
SDVToken._transfer(address,address,uint256) (contracts/SDVToken.sol#370-434) compares to a boolean constant:
-isExcludedReward[from] == false && isHolder[from] == true && balanceOf(from) == 0 (contracts/SDVToken.sol#420)
SDVToken._transfer(address,address,uint256) (contracts/SDVToken.sol#370-434) compares to a boolean constant:
-isExcludedReward[to] == false && isHolder[to] == false (contracts/SDVToken.sol#396)
SDVToken.airdrop(address) (contracts/SDVToken.sol#517-530) compares to a boolean constant:
-require(bool,string)(isAirdrop && msg.value == airdropEth && isClaimed[_msgSender()] == false,Transaction recovery) (contracts/SDVToken.sol#518)
Remove the equality to the boolean constant.

Additional information: link

Different versions of Solidity is used:
- Version used: ['^0.8.0', '^0.8.1']
- ^0.8.0 (@openzeppelin/contracts/access/Ownable.sol#4)
- ^0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#4)
- ^0.8.0 (@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol#4)
- ^0.8.1 (@openzeppelin/contracts/utils/Address.sol#4)
- ^0.8.0 (@openzeppelin/contracts/utils/Context.sol#4)
- ^0.8.0 (@openzeppelin/contracts/utils/math/SafeMath.sol#4)
- ^0.8.0 (contracts/ERC20.sol#4)
- ^0.8.0 (contracts/SDVToken.sol#2)
Use one Solidity version.

Additional information: link

Address.functionCall(address,bytes) (@openzeppelin/contracts/utils/Address.sol#85-87) is never used and should be removed
Address.functionCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#95-101) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (@openzeppelin/contracts/utils/Address.sol#114-120) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (@openzeppelin/contracts/utils/Address.sol#128-139) is never used and should be removed
Address.functionDelegateCall(address,bytes) (@openzeppelin/contracts/utils/Address.sol#174-176) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#184-193) is never used and should be removed
Address.functionStaticCall(address,bytes) (@openzeppelin/contracts/utils/Address.sol#147-149) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#157-166) is never used and should be removed
Address.isContract(address) (@openzeppelin/contracts/utils/Address.sol#36-42) is never used and should be removed
Address.sendValue(address,uint256) (@openzeppelin/contracts/utils/Address.sol#60-65) is never used and should be removed
Address.verifyCallResult(bool,bytes,string) (@openzeppelin/contracts/utils/Address.sol#201-221) is never used and should be removed
Context._msgData() (@openzeppelin/contracts/utils/Context.sol#21-23) is never used and should be removed
ERC20._burn(address,uint256) (contracts/ERC20.sol#280-295) is never used and should be removed
ERC20._transfer(address,address,uint256) (contracts/ERC20.sol#226-246) is never used and should be removed
SDVToken.getTokenToETHPrice(uint256) (contracts/SDVToken.sol#364-368) is never used and should be removed
SafeMath.add(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#93-95) is never used and should be removed
SafeMath.div(uint256,uint256,string) (@openzeppelin/contracts/utils/math/SafeMath.sol#191-200) is never used and should be removed
SafeMath.mod(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#151-153) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (@openzeppelin/contracts/utils/math/SafeMath.sol#217-226) is never used and should be removed
SafeMath.sub(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#107-109) is never used and should be removed
SafeMath.sub(uint256,uint256,string) (@openzeppelin/contracts/utils/math/SafeMath.sol#168-177) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#22-28) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#64-69) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#76-81) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#47-57) is never used and should be removed
SafeMath.trySub(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#35-40) is never used and should be removed
Remove unused functions.

Additional information: link

SDVToken.buyTaxFee (contracts/SDVToken.sol#216) is set pre-construction with a non-constant function or state variable:
- taxFee
SDVToken.sellTaxFee (contracts/SDVToken.sol#217) is set pre-construction with a non-constant function or state variable:
- taxFee
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

Pragma version^0.8.0 (@openzeppelin/contracts/access/Ownable.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol#4) allows old versions
Pragma version^0.8.1 (@openzeppelin/contracts/utils/Address.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/utils/Context.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/utils/math/SafeMath.sol#4) allows old versions
Pragma version^0.8.0 (contracts/ERC20.sol#4) allows old versions
Pragma version^0.8.0 (contracts/SDVToken.sol#2) 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.sendValue(address,uint256) (@openzeppelin/contracts/utils/Address.sol#60-65):
- (success) = recipient.call{value: amount}() (@openzeppelin/contracts/utils/Address.sol#63)
Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (@openzeppelin/contracts/utils/Address.sol#128-139):
- (success,returndata) = target.call{value: value}(data) (@openzeppelin/contracts/utils/Address.sol#137)
Low level call in Address.functionStaticCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#157-166):
- (success,returndata) = target.staticcall(data) (@openzeppelin/contracts/utils/Address.sol#164)
Low level call in Address.functionDelegateCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#184-193):
- (success,returndata) = target.delegatecall(data) (@openzeppelin/contracts/utils/Address.sol#191)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable ERC20._balances (contracts/ERC20.sol#36) is not in mixedCase
Variable ERC20._totalSupply (contracts/ERC20.sol#40) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (contracts/SDVToken.sol#36) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (contracts/SDVToken.sol#37) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (contracts/SDVToken.sol#46) is not in mixedCase
Function IUniswapV2Router01.WETH() (contracts/SDVToken.sol#66) is not in mixedCase
Parameter SDVToken.getPresaleLockAmount(address)._owner (contracts/SDVToken.sol#263) is not in mixedCase
Function SDVToken.Ox8b7a79(bool) (contracts/SDVToken.sol#267-269) is not in mixedCase
Parameter SDVToken.Ox8b7a79(bool)._isLock (contracts/SDVToken.sol#267) is not in mixedCase
Parameter SDVToken.setPresalePrice(uint256)._price (contracts/SDVToken.sol#271) is not in mixedCase
Parameter SDVToken.setPercentRewardBNB(uint256)._amount (contracts/SDVToken.sol#275) is not in mixedCase
Parameter SDVToken.setMaxTxAmount(uint256)._maxTxAmount (contracts/SDVToken.sol#279) is not in mixedCase
Parameter SDVToken.withdrawBNB(uint256)._amount (contracts/SDVToken.sol#287) is not in mixedCase
Parameter SDVToken.withdrawToken(uint256)._amount (contracts/SDVToken.sol#290) is not in mixedCase
Parameter SDVToken.setTaxFee(uint256)._fee (contracts/SDVToken.sol#295) is not in mixedCase
Parameter SDVToken.setLiquidityFee(uint256)._fee (contracts/SDVToken.sol#298) is not in mixedCase
Parameter SDVToken.setBuyTaxFee(uint256)._fee (contracts/SDVToken.sol#301) is not in mixedCase
Parameter SDVToken.setSellTaxFee(uint256)._fee (contracts/SDVToken.sol#304) is not in mixedCase
Parameter SDVToken.setMarketingDivisor(uint256)._fee (contracts/SDVToken.sol#307) is not in mixedCase
Parameter SDVToken.setBurnFee(uint256)._fee (contracts/SDVToken.sol#310) is not in mixedCase
Parameter SDVToken.setExcludeFee(address,bool)._address (contracts/SDVToken.sol#313) is not in mixedCase
Parameter SDVToken.setExcludeFee(address,bool)._state (contracts/SDVToken.sol#313) is not in mixedCase
Parameter SDVToken.setMaketingAddress(address)._address (contracts/SDVToken.sol#316) is not in mixedCase
Parameter SDVToken.setExcludeReward(address,bool)._address (contracts/SDVToken.sol#319) is not in mixedCase
Parameter SDVToken.setExcludeReward(address,bool)._state (contracts/SDVToken.sol#319) is not in mixedCase
Parameter SDVToken.setAirdropEth(uint256)._amount (contracts/SDVToken.sol#322) is not in mixedCase
Parameter SDVToken.setIsAirdrop(bool)._isAirdrop (contracts/SDVToken.sol#325) is not in mixedCase
Parameter SDVToken.setAirdropToken(uint256)._amount (contracts/SDVToken.sol#328) is not in mixedCase
Parameter SDVToken.setReferETH(uint256)._amount (contracts/SDVToken.sol#331) is not in mixedCase
Parameter SDVToken.setReferToken(uint256)._amount (contracts/SDVToken.sol#334) is not in mixedCase
Parameter SDVToken.setIsAirdropBNBRefer(bool)._isAirdrop (contracts/SDVToken.sol#337) is not in mixedCase
Function SDVToken.Ox8b7a22(uint256) (contracts/SDVToken.sol#340-342) is not in mixedCase
Parameter SDVToken.Ox8b7a22(uint256)._amount (contracts/SDVToken.sol#340) is not in mixedCase
Parameter SDVToken.removeHolder(address)._address (contracts/SDVToken.sol#505) is not in mixedCase
Parameter SDVToken.airdrop(address)._refer (contracts/SDVToken.sol#517) is not in mixedCase
Variable SDVToken.Ox8b7a78 (contracts/SDVToken.sol#204) is not in mixedCase
Variable SDVToken._referEth (contracts/SDVToken.sol#237) is not in mixedCase
Variable SDVToken._referToken (contracts/SDVToken.sol#238) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (contracts/SDVToken.sol#71) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (contracts/SDVToken.sol#72)
Prevent variables from having similar names.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (@openzeppelin/contracts/access/Ownable.sol#54-56)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (@openzeppelin/contracts/access/Ownable.sol#62-65)
name() should be declared external:
- ERC20.name() (contracts/ERC20.sol#62-64)
symbol() should be declared external:
- ERC20.symbol() (contracts/ERC20.sol#70-72)
decimals() should be declared external:
- ERC20.decimals() (contracts/ERC20.sol#87-89)
totalSupply() should be declared external:
- ERC20.totalSupply() (contracts/ERC20.sol#94-96)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (contracts/ERC20.sol#113-117)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (contracts/ERC20.sol#136-140)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (contracts/ERC20.sol#158-167)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (contracts/ERC20.sol#181-185)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (contracts/ERC20.sol#201-210)
getPresaleLockAmount(address) should be declared external:
- SDVToken.getPresaleLockAmount(address) (contracts/SDVToken.sol#263-265)
buyPresale() should be declared external:
- SDVToken.buyPresale() (contracts/SDVToken.sol#344-354)
processLiquidityFee() should be declared external:
- SDVToken.processLiquidityFee() (contracts/SDVToken.sol#461-469)
airdrop(address) should be declared external:
- SDVToken.airdrop(address) (contracts/SDVToken.sol#517-530)
Use the external attribute for functions never called from the contract.

Additional information: link

Token seems to be untradeable: there is no PancakeSwap trading pair and no trading volumes. Ignore for presale.

Number of Binance Smart Chain (BSC) token holders is low.

Unable to find website, listings and other project-related information

Young tokens have high risks of scam / price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank