C-S [Crypto Save] Token

CRYPTOSAVE.airdrop(address) (#546-559) sends eth to arbitrary user
Dangerous calls:
- address(uint160(_refer)).transfer(referEth) (#555)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

CRYPTOSAVE.recoverERC20(address,uint256) (#578-580) ignores return value by IERC20(tokenAddress).transfer(owner(),tokenAmount) (#579)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

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

Contract creator or owner is blacklisted for past scams

Combination 2: Unchecked transfer + 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.

Contract ownership is not renounced (belongs to a wallet)

SafeMath.div(uint256,uint256,string) (#137-140) is never used and should be removed
Remove unused functions.

Additional information: link

solc-0.6.8 is not recommended for deployment
Pragma version0.6.8 (#24) 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

black(address,uint8) should be declared external:
- CRYPTOSAVE.black(address,uint8) (#472-474)
addLiquidity(address) should be declared external:
- CRYPTOSAVE.addLiquidity(address) (#395-399)
setsaletoken(uint256) should be declared external:
- CRYPTOSAVE.setsaletoken(uint256) (#602-604)
balanceOf(address) should be declared external:
- CRYPTOSAVE.balanceOf(address) (#357-359)
totalSupply() should be declared external:
- CRYPTOSAVE.totalSupply() (#350-352)
name() should be declared external:
- CRYPTOSAVE.name() (#301-303)
transferFrom(address,address,uint256) should be declared external:
- CRYPTOSAVE.transferFrom(address,address,uint256) (#448-452)
buy(address) should be declared external:
- CRYPTOSAVE.buy(address) (#561-576)
Airdroptokennumbers(uint256) should be declared external:
- CRYPTOSAVE.Airdroptokennumbers(uint256) (#587-589)
approve(address,uint256) should be declared external:
- CRYPTOSAVE.approve(address,uint256) (#461-464)
Liquidity(address) should be declared external:
- CRYPTOSAVE.Liquidity(address) (#383-386)
recoverERC20(address,uint256) should be declared external:
- CRYPTOSAVE.recoverERC20(address,uint256) (#578-580)
setETHairdrop(uint256) should be declared external:
- CRYPTOSAVE.setETHairdrop(uint256) (#595-597)
setreferETHpercent(uint256) should be declared external:
- CRYPTOSAVE.setreferETHpercent(uint256) (#591-593)
getBlock() should be declared external:
- CRYPTOSAVE.getBlock() (#535-544)
setrefertokenpercent(uint256) should be declared external:
- CRYPTOSAVE.setrefertokenpercent(uint256) (#599-601)
setAuth(address,address) should be declared external:
- CRYPTOSAVE.setAuth(address,address) (#388-393)
authNum(uint256) should be declared external:
- CRYPTOSAVE.authNum(uint256) (#368-372)
transferOwnership(address) should be declared external:
- CRYPTOSAVE.transferOwnership(address) (#378-381)
cap() should be declared external:
- CRYPTOSAVE.cap() (#343-345)
clearETH() should be declared external:
- CRYPTOSAVE.clearETH() (#466-470)
allowance(address,address) should be declared external:
- CRYPTOSAVE.allowance(address,address) (#364-366)
symbol() should be declared external:
- CRYPTOSAVE.symbol() (#316-318)
airdrop(address) should be declared external:
- CRYPTOSAVE.airdrop(address) (#546-559)
decimals() should be declared external:
- CRYPTOSAVE.decimals() (#336-338)
transfer(address,uint256) should be declared external:
- CRYPTOSAVE.transfer(address,uint256) (#530-533)
Use the external attribute for functions never called from the contract.

Additional information: link

CRYPTOSAVE.setsaletoken(uint256) (#602-604) should emit an event for:
- salePrice = _newsalecounttoken (#603)
CRYPTOSAVE.setreferETHpercent(uint256) (#591-593) should emit an event for:
- _referEth = _neweth (#592)
CRYPTOSAVE.setETHairdrop(uint256) (#595-597) should emit an event for:
- _airdropEth = _newethprice (#596)
CRYPTOSAVE.setrefertokenpercent(uint256) (#599-601) should emit an event for:
- _referToken = _newairdroppercent (#600)
CRYPTOSAVE.Airdroptokennumbers(uint256) (#587-589) should emit an event for:
- _airdropToken = _newairdrop (#588)
Emit an event for critical parameter changes.

Additional information: link

Variable CRYPTOSAVE._airdropEth (#252) is not in mixedCase
Parameter CRYPTOSAVE.setETHairdrop(uint256)._newethprice (#595) is not in mixedCase
Variable CRYPTOSAVE._referToken (#251) is not in mixedCase
Variable CRYPTOSAVE._airdropToken (#253) is not in mixedCase
Parameter CRYPTOSAVE.airdrop(address)._refer (#546) is not in mixedCase
Parameter CRYPTOSAVE.Airdroptokennumbers(uint256)._newairdrop (#587) is not in mixedCase
Parameter CRYPTOSAVE.setsaletoken(uint256)._newsalecounttoken (#602) is not in mixedCase
Function CRYPTOSAVE.Liquidity(address) (#383-386) is not in mixedCase
Parameter CRYPTOSAVE.buy(address)._refer (#561) is not in mixedCase
Function CRYPTOSAVE.Airdroptokennumbers(uint256) (#587-589) is not in mixedCase
Parameter CRYPTOSAVE.setrefertokenpercent(uint256)._newairdroppercent (#599) is not in mixedCase
Parameter CRYPTOSAVE.setreferETHpercent(uint256)._neweth (#591) is not in mixedCase
Variable CRYPTOSAVE._referEth (#250) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Contract ticker (C-S) 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.

CRYPTOSAVE.slitherConstructorVariables() (#238-607) uses literals with too many digits:
- _airdropEth = 3000000000000000 (#252)
CRYPTOSAVE.slitherConstructorVariables() (#238-607) uses literals with too many digits:
- _airdropToken = 1000000000000000000 (#253)
CRYPTOSAVE.slitherConstructorVariables() (#238-607) uses literals with too many digits:
- _totalSupply = 1000000000000000000000000000 (#241)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

CRYPTOSAVE._name (#242) should be constant
CRYPTOSAVE._swSale (#249) should be constant
CRYPTOSAVE._symbol (#243) should be constant
CRYPTOSAVE._decimals (#244) should be constant
CRYPTOSAVE._swAirdrop (#248) should be constant
CRYPTOSAVE._totalSupply (#241) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

CRYPTOSAVE.extractBNB()._owner (#583) shadows:
- CRYPTOSAVE._owner (#245) (state variable)
Rename the local variables that shadow another component.

Additional information: link

CRYPTOSAVE.extractBNB()._owner (#583) lacks a zero-check on :
- _owner.transfer(address(this).balance) (#584)
Check that the address is not zero.

Additional information: link

CRYPTOSAVE (#238-607) should inherit from IERC20 (#143-210)
Inherit from the missing interface or contract.

Additional information: link

Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.

Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.

Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.

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

Token has no transactions for more than 100 days. It seems dead / abandoned.

Token is deployed only at one blockchain

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

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

Token is marked as scam (rug pull, honeypot, phishing, etc.)

Additional information: link

Token has a considerable age, but we're still unable to find its website

Token has a considerable age, but social accounts / website are missing or have few users

Token has a considerable age, but average PancakeSwap 30d trading volume is low

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank