CAS [CaiShen] Token

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

CaiShen._addLiquidity(uint256,uint256,address) (CaiShen.sol#342-352) sends eth to arbitrary user
Dangerous calls:
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in CaiShen._transfer(address,address,uint256) (CaiShen.sol#205-288):
External calls:
- _swapFees() (CaiShen.sol#283)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
External calls sending eth:
- _swapFees() (CaiShen.sol#283)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
State variables written after the call(s):
- _simpleTransfer(sender,recipient,amount) (CaiShen.sol#287)
- _balances[sender] = _balances[sender] - amount (CaiShen.sol#295)
- _balances[recipient] = _balances[recipient] + amount (CaiShen.sol#296)
Apply the check-effects-interactions pattern.

Additional information: link

Combination 1: Reentrancy vulnerabilities + Functions that send Ether to arbitraty destination. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

CaiShen._addLiquidity(uint256,uint256,address) (CaiShen.sol#342-352) ignores return value by _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
Ensure that all the return values of the function calls are used.

Additional information: link

CaiShen.allowance(address,address).owner (CaiShen.sol#142) shadows:
- Ownable.owner() (Ownable.sol#39-41) (function)
CaiShen._approve(address,address,uint256).owner (CaiShen.sol#372) shadows:
- Ownable.owner() (Ownable.sol#39-41) (function)
Rename the local variables that shadow another component.

Additional information: link

CaiShen.setMarketingAddress(address).addr (CaiShen.sol#421) lacks a zero-check on :
- _marketingAddress = addr (CaiShen.sol#423)
Check that the address is not zero.

Additional information: link

Reentrancy in CaiShen._swapFees() (CaiShen.sol#300-317):
External calls:
- swapped = _swapTokensForBNBs(tokens_to_swap,address(this)) (CaiShen.sol#309)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
External calls sending eth:
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
State variables written after the call(s):
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
- _allowances[owner][spender] = amount (CaiShen.sol#385)
- isSwapping = false (CaiShen.sol#315)
Reentrancy in CaiShen.constructor(address) (CaiShen.sol#51-77):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (CaiShen.sol#69-72)
State variables written after the call(s):
- _liqAutoSwap = false (CaiShen.sol#76)
- _permissions[msg.sender] = true (CaiShen.sol#75)
- automatedMarketMakerPairs[_uniswapV2Pair] = true (CaiShen.sol#73)
Reentrancy in CaiShen.transferFrom(address,address,uint256) (CaiShen.sol#170-183):
External calls:
- _transfer(sender,recipient,amount) (CaiShen.sol#175)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
External calls sending eth:
- _transfer(sender,recipient,amount) (CaiShen.sol#175)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (CaiShen.sol#177-181)
- _allowances[owner][spender] = amount (CaiShen.sol#385)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in CaiShen._swapFees() (CaiShen.sol#300-317):
External calls:
- swapped = _swapTokensForBNBs(tokens_to_swap,address(this)) (CaiShen.sol#309)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
External calls sending eth:
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
Event emitted after the call(s):
- Approval(owner,spender,amount) (CaiShen.sol#386)
- _addLiquidity(liquidity_token,liquidity_bnb,_liquidityTokenWallet) (CaiShen.sol#312)
Reentrancy in CaiShen._transfer(address,address,uint256) (CaiShen.sol#205-288):
External calls:
- _swapFees() (CaiShen.sol#283)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
External calls sending eth:
- _swapFees() (CaiShen.sol#283)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (CaiShen.sol#297)
- _simpleTransfer(sender,recipient,amount) (CaiShen.sol#287)
Reentrancy in CaiShen.transferFrom(address,address,uint256) (CaiShen.sol#170-183):
External calls:
- _transfer(sender,recipient,amount) (CaiShen.sol#175)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,to,block.timestamp) (CaiShen.sol#335)
External calls sending eth:
- _transfer(sender,recipient,amount) (CaiShen.sol#175)
- _uniswapV2Router.addLiquidityETH{value: bnb_amount}(address(this),token_amount,0,0,to,block.timestamp) (CaiShen.sol#344-351)
Event emitted after the call(s):
- Approval(owner,spender,amount) (CaiShen.sol#386)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (CaiShen.sol#177-181)
Apply the check-effects-interactions pattern.

Additional information: link

CaiShen._transfer(address,address,uint256) (CaiShen.sol#205-288) uses timestamp for comparisons
Dangerous comparisons:
- _feeDiscountUntil >= block.timestamp (CaiShen.sol#253)
- _feeDiscountUntil >= block.timestamp (CaiShen.sol#259)
CaiShen.launchAirdrop(uint256,address[],uint256) (CaiShen.sol#464-476) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(deadline > block.timestamp,CaiShen: bad deadline) (CaiShen.sol#469)
Avoid relying on block.timestamp.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.6.2', '^0.8.0']
- ^0.8.0 (CaiShen.sol#3)
- ^0.8.0 (Context.sol#3)
- ^0.8.0 (IBEP20.sol#3)
- >=0.6.2 (IUniswapV2Factory.sol#3)
- >=0.6.2 (IUniswapV2Router.sol#3)
- ^0.8.0 (Ownable.sol#3)
Use one Solidity version.

Additional information: link

Context._msgData() (Context.sol#20-23) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.0 (CaiShen.sol#3) allows old versions
Pragma version^0.8.0 (Context.sol#3) allows old versions
Pragma version^0.8.0 (IBEP20.sol#3) allows old versions
Pragma version>=0.6.2 (IUniswapV2Factory.sol#3) allows old versions
Pragma version>=0.6.2 (IUniswapV2Router.sol#3) allows old versions
Pragma version^0.8.0 (Ownable.sol#3) allows old versions
solc-0.8.11 is not recommended for deployment
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

Parameter CaiShen.startTrading(uint256)._as (CaiShen.sol#185) is not in mixedCase
Parameter CaiShen.setBlock(address[],bool)._addr (CaiShen.sol#394) is not in mixedCase
Parameter CaiShen.isBlocked(address)._addr (CaiShen.sol#400) is not in mixedCase
Variable CaiShen._marketingAddress (CaiShen.sol#23) is not in mixedCase
Variable CaiShen._buyMarketingFee (CaiShen.sol#24) is not in mixedCase
Variable CaiShen._sellMarketingFee (CaiShen.sol#25) is not in mixedCase
Variable CaiShen._liquidityFee (CaiShen.sol#27) is not in mixedCase
Variable CaiShen._liquidityTokenWallet (CaiShen.sol#28) is not in mixedCase
Variable CaiShen._liqAutoSwapThreshold (CaiShen.sol#30) is not in mixedCase
Variable CaiShen._burnFee (CaiShen.sol#32) is not in mixedCase
Variable CaiShen._burnAddress (CaiShen.sol#33) is not in mixedCase
Variable CaiShen._uniswapV2Router (CaiShen.sol#41) is not in mixedCase
Variable CaiShen._uniswapV2Pair (CaiShen.sol#42) is not in mixedCase
Variable CaiShen._launched (CaiShen.sol#47) is not in mixedCase
Function IUniswapV2Router01.WETH() (IUniswapV2Router.sol#7) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (Context.sol#21)" inContext (Context.sol#15-25)
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 (IUniswapV2Router.sol#12) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (IUniswapV2Router.sol#13)
Prevent variables from having similar names.

Additional information: link

CaiShen.slitherConstructorVariables() (CaiShen.sol#11-486) uses literals with too many digits:
- _liquidityTokenWallet = 0x000000000000000000000000000000000000dEaD (CaiShen.sol#28)
CaiShen.slitherConstructorVariables() (CaiShen.sol#11-486) uses literals with too many digits:
- _burnAddress = 0x000000000000000000000000000000000000dEaD (CaiShen.sol#33)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

CaiShen._abf (CaiShen.sol#49) should be constant
CaiShen._burnAddress (CaiShen.sol#33) should be constant
CaiShen._liquidityTokenWallet (CaiShen.sol#28) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

startTrading(uint256) should be declared external:
- CaiShen.startTrading(uint256) (CaiShen.sol#185-189)
swapFees() should be declared external:
- CaiShen.swapFees() (CaiShen.sol#319-321)
setABlks(uint256) should be declared external:
- CaiShen.setABlks(uint256) (CaiShen.sol#354-356)
setBlock(address[],bool) should be declared external:
- CaiShen.setBlock(address[],bool) (CaiShen.sol#394-398)
isBlocked(address) should be declared external:
- CaiShen.isBlocked(address) (CaiShen.sol#400-402)
setFee(uint256,uint256,uint256,uint256) should be declared external:
- CaiShen.setFee(uint256,uint256,uint256,uint256) (CaiShen.sol#404-409)
setPermission(address,bool) should be declared external:
- CaiShen.setPermission(address,bool) (CaiShen.sol#411-414)
hasPermission(address) should be declared external:
- CaiShen.hasPermission(address) (CaiShen.sol#416-419)
setMarketingAddress(address) should be declared external:
- CaiShen.setMarketingAddress(address) (CaiShen.sol#421-426)
setFeeWhitelist(address,bool) should be declared external:
- CaiShen.setFeeWhitelist(address,bool) (CaiShen.sol#428-430)
bulkSetFeeWhitelist(address[],bool) should be declared external:
- CaiShen.bulkSetFeeWhitelist(address[],bool) (CaiShen.sol#432-436)
feeWhitelisted(address) should be declared external:
- CaiShen.feeWhitelisted(address) (CaiShen.sol#438-440)
setAutoSwap(bool,uint256) should be declared external:
- CaiShen.setAutoSwap(bool,uint256) (CaiShen.sol#442-445)
setFeeDiscount(uint256,uint256) should be declared external:
- CaiShen.setFeeDiscount(uint256,uint256) (CaiShen.sol#447-452)
setAutomatedMarketMakerPair(address,bool) should be declared external:
- CaiShen.setAutomatedMarketMakerPair(address,bool) (CaiShen.sol#454-457)
launchAirdrop(uint256,address[],uint256) should be declared external:
- CaiShen.launchAirdrop(uint256,address[],uint256) (CaiShen.sol#464-476)
sendAirdrop(address,uint256) should be declared external:
- CaiShen.sendAirdrop(address,uint256) (CaiShen.sol#478-480)
claimRewards() should be declared external:
- CaiShen.claimRewards() (CaiShen.sol#482-485)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (Ownable.sol#58-62)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (Ownable.sol#68-71)
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