Polar Bear Token

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

Reentrancy in PolarBear._transfer(address,address,uint256) (#1165-1195):
External calls:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
State variables written after the call(s):
- _tokenTransfer(from,to,amount) (#1194)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#1108)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1283)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1290)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1284)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1299)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1307)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1292)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1300)
- _rOwned[charityWallet] = _rOwned[charityWallet].add(rCharity) (#1046)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1309)
- _tokenTransfer(from,to,amount) (#1194)
- _rTotal = _rTotal.sub(rFee).sub(rBurn) (#1041)
- _tokenTransfer(from,to,amount) (#1194)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1298)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1306)
- _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount) (#1291)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#1110)
- _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount) (#1308)
- _tOwned[charityWallet] = _tOwned[charityWallet].add(tCharity) (#1048)
- _tokenTransfer(from,to,amount) (#1194)
- _tTotal = _tTotal.sub(tBurn) (#1043)
Apply the check-effects-interactions pattern.

Additional information: link

Contract ticker (Polar Bear) contains non-alphanumeric characters.
Not a direct threat, but may indicate unreliable intentions of developer. Non-alphanumeric chars (,.;!#*&") are extremely rare among low risk tokens.

PolarBear.addLiquidity(uint256,uint256) (#1238-1251) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
Ensure that all the return values of the function calls are used.

Additional information: link

PolarBear.allowance(address,address).owner (#945) shadows:
- Ownable.owner() (#521-523) (function)
PolarBear._approve(address,address,uint256).owner (#1156) shadows:
- Ownable.owner() (#521-523) (function)
Rename the local variables that shadow another component.

Additional information: link

PolarBear.mintToken(address,uint256) (#938-943) should emit an event for:
- _tTotal += amount (#941)
PolarBear.setMaxTxPercent(uint256) (#1350-1355) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(10 ** 2) (#1352-1354)
Emit an event for critical parameter changes.

Additional information: link

PolarBear.setBoxerCharityWallet(address).newWallet (#1346) lacks a zero-check on :
- charityWallet = newWallet (#1347)
Check that the address is not zero.

Additional information: link

Reentrancy in PolarBear._transfer(address,address,uint256) (#1165-1195):
External calls:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
State variables written after the call(s):
- _tokenTransfer(from,to,amount) (#1194)
- _burnFee = 0 (#1140)
- _burnFee = 1 (#1148)
- _tokenTransfer(from,to,amount) (#1194)
- _charityFee = 1 (#1147)
- _charityFee = 0 (#1141)
- _tokenTransfer(from,to,amount) (#1194)
- _liquidityFee = 1 (#1146)
- _liquidityFee = 0 (#1139)
- _tokenTransfer(from,to,amount) (#1194)
- _tBurnTotal = _tBurnTotal.add(tBurn) (#1044)
- _tokenTransfer(from,to,amount) (#1194)
- _tFeeTotal = _tFeeTotal.add(tFee) (#1042)
- _tokenTransfer(from,to,amount) (#1194)
- _taxFee = 1 (#1145)
- _taxFee = 0 (#1138)
Reentrancy in PolarBear.constructor() (#888-904):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#893-894)
State variables written after the call(s):
- _isExcludedFromFee[owner()] = true (#900)
- _isExcludedFromFee[address(this)] = true (#901)
- uniswapV2Router = _uniswapV2Router (#897)
Reentrancy in PolarBear.swapAndLiquify(uint256) (#1197-1218):
External calls:
- swapTokensForEth(half) (#1209)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
- addLiquidity(otherHalf,newBalance) (#1215)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1215)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1215)
- _allowances[owner][spender] = amount (#1161)
Reentrancy in PolarBear.transferFrom(address,address,uint256) (#955-961):
External calls:
- _transfer(sender,recipient,amount) (#958)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
External calls sending eth:
- _transfer(sender,recipient,amount) (#958)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#959)
- _allowances[owner][spender] = amount (#1161)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in PolarBear._transfer(address,address,uint256) (#1165-1195):
External calls:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1190)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
Event emitted after the call(s):
- Transfer(sender,recipient,vs.tTransferAmount) (#1285)
- _tokenTransfer(from,to,amount) (#1194)
- Transfer(sender,recipient,vs.tTransferAmount) (#1301)
- _tokenTransfer(from,to,amount) (#1194)
- Transfer(sender,recipient,vs.tTransferAmount) (#1293)
- _tokenTransfer(from,to,amount) (#1194)
- Transfer(sender,recipient,vs.tTransferAmount) (#1310)
- _tokenTransfer(from,to,amount) (#1194)
Reentrancy in PolarBear.constructor() (#888-904):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#893-894)
Event emitted after the call(s):
- Transfer(address(0),_msgSender(),_tTotal) (#903)
Reentrancy in PolarBear.swapAndLiquify(uint256) (#1197-1218):
External calls:
- swapTokensForEth(half) (#1209)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
- addLiquidity(otherHalf,newBalance) (#1215)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1215)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1162)
- addLiquidity(otherHalf,newBalance) (#1215)
- SwapAndLiquify(half,newBalance,otherHalf) (#1217)
Reentrancy in PolarBear.transferFrom(address,address,uint256) (#955-961):
External calls:
- _transfer(sender,recipient,amount) (#958)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1229-1235)
External calls sending eth:
- _transfer(sender,recipient,amount) (#958)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1243-1250)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1162)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#959)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#568-573) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#570)
Avoid relying on block.timestamp.

Additional information: link

Address.isContract(address) (#373-382) uses assembly
- INLINE ASM (#380)
Address._functionCallWithValue(address,bytes,uint256,string) (#466-487) uses assembly
- INLINE ASM (#479-482)
Do not use evm assembly.

Additional information: link

PolarBear.includeInReward(address) (#1024-1035) has costly operations inside a loop:
- _excluded.pop() (#1031)
Use a local variable to hold the loop computation result.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#466-487) is never used and should be removed
Address.functionCall(address,bytes) (#426-428) is never used and should be removed
Address.functionCall(address,bytes,string) (#436-438) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#451-453) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#461-464) is never used and should be removed
Address.isContract(address) (#373-382) is never used and should be removed
Address.sendValue(address,uint256) (#400-406) is never used and should be removed
Context._msgData() (#345-348) is never used and should be removed
SafeMath.mod(uint256,uint256) (#318-320) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#334-337) is never used and should be removed
Remove unused functions.

Additional information: link

PolarBear._rTotal (#843) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
PolarBear._previousTaxFee (#852) is set pre-construction with a non-constant function or state variable:
- _taxFee
PolarBear._previousBurnFee (#855) is set pre-construction with a non-constant function or state variable:
- _burnFee
PolarBear._previousCharityFee (#858) is set pre-construction with a non-constant function or state variable:
- _charityFee
PolarBear._previousLiquidityFee (#861) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
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

Low level call in Address.sendValue(address,uint256) (#400-406):
- (success) = recipient.call{value: amount}() (#404)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#466-487):
- (success,returndata) = target.call{value: weiValue}(data) (#470)
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.DOMAIN_SEPARATOR() (#612) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#613) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#630) is not in mixedCase
Function IUniswapV2Router01.WETH() (#652) is not in mixedCase
Parameter PolarBear.calculateTaxFee(uint256)._amount (#1113) is not in mixedCase
Parameter PolarBear.calculateBurnFee(uint256)._amount (#1119) is not in mixedCase
Parameter PolarBear.calculateCharityFee(uint256)._amount (#1125) is not in mixedCase
Parameter PolarBear.calculateLiquidityFee(uint256)._amount (#1131) is not in mixedCase
Parameter PolarBear.setSwapAndLiquifyEnabled(bool)._enabled (#1357) is not in mixedCase
Variable PolarBear.Additional_issuance_record (#834) is not in mixedCase
Variable PolarBear._taxFee (#851) is not in mixedCase
Variable PolarBear._burnFee (#854) is not in mixedCase
Variable PolarBear._charityFee (#857) is not in mixedCase
Variable PolarBear._liquidityFee (#860) is not in mixedCase
Variable PolarBear._maxTxAmount (#871) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#346)" inContext (#340-349)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#657) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#658)
Variable PolarBear._getRValues(uint256,uint256,uint256,uint256,uint256,uint256).rTransferAmount (#1086) is too similar to PolarBear._getTValues(uint256).tTransferAmount (#1076)
Variable PolarBear.reflectionFromToken(uint256,bool).rTransferAmount (#1001) is too similar to PolarBear._getTValues(uint256).tTransferAmount (#1076)
Prevent variables from having similar names.

Additional information: link

PolarBear._decimals (#849) should be constant
PolarBear._name (#847) should be constant
PolarBear._symbol (#848) should be constant
PolarBear.numTokensSellToAddToLiquidity (#872) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#540-543)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#549-553)
geUnlockTime() should be declared external:
- Ownable.geUnlockTime() (#555-557)
lock(uint256) should be declared external:
- Ownable.lock(uint256) (#560-565)
unlock() should be declared external:
- Ownable.unlock() (#568-573)
name() should be declared external:
- PolarBear.name() (#906-908)
symbol() should be declared external:
- PolarBear.symbol() (#910-912)
decimals() should be declared external:
- PolarBear.decimals() (#914-916)
totalSupply() should be declared external:
- PolarBear.totalSupply() (#918-920)
transfer(address,uint256) should be declared external:
- PolarBear.transfer(address,uint256) (#927-931)
freezeAccount(address,bool) should be declared external:
- PolarBear.freezeAccount(address,bool) (#933-936)
allowance(address,address) should be declared external:
- PolarBear.allowance(address,address) (#945-947)
approve(address,uint256) should be declared external:
- PolarBear.approve(address,uint256) (#949-953)
transferFrom(address,address,uint256) should be declared external:
- PolarBear.transferFrom(address,address,uint256) (#955-961)
increaseAllowance(address,uint256) should be declared external:
- PolarBear.increaseAllowance(address,uint256) (#963-966)
decreaseAllowance(address,uint256) should be declared external:
- PolarBear.decreaseAllowance(address,uint256) (#968-971)
isExcludedFromReward(address) should be declared external:
- PolarBear.isExcludedFromReward(address) (#973-975)
totalFees() should be declared external:
- PolarBear.totalFees() (#977-979)
totalBurn() should be declared external:
- PolarBear.totalBurn() (#981-983)
deliver(uint256) should be declared external:
- PolarBear.deliver(uint256) (#985-993)
reflectionFromToken(uint256,bool) should be declared external:
- PolarBear.reflectionFromToken(uint256,bool) (#995-1004)
excludeFromReward(address) should be declared external:
- PolarBear.excludeFromReward(address) (#1012-1022)
isExcludedFromFee(address) should be declared external:
- PolarBear.isExcludedFromFee(address) (#1152-1154)
excludeFromFee(address) should be declared external:
- PolarBear.excludeFromFee(address) (#1313-1315)
includeInFee(address) should be declared external:
- PolarBear.includeInFee(address) (#1317-1319)
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 less than 100. Token is either dead or inactive. Ignore for presale.

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