CRYPTO NINJA Token

NINJA.airdrop(address) (#545-558) sends eth to arbitrary user
Dangerous calls:
- address(uint160(_refer)).transfer(referEth) (#554)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

NINJA.recoverERC20(address,uint256) (#577-579) ignores return value by IERC20(tokenAddress).transfer(owner(),tokenAmount) (#578)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

Contract creator or owner is blacklisted for past scams

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

Contract ownership is not renounced (belongs to a wallet)

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.

NINJA.Airdroptokennumbers(uint256) (#586-588) should emit an event for:
- _airdropToken = _newairdrop (#587)
NINJA.setreferETHpercent(uint256) (#590-592) should emit an event for:
- _referEth = _neweth (#591)
NINJA.setETHairdrop(uint256) (#594-596) should emit an event for:
- _airdropEth = _newethprice (#595)
NINJA.setrefertokenpercent(uint256) (#598-600) should emit an event for:
- _referToken = _newairdroppercent (#599)
NINJA.setsaletoken(uint256) (#601-603) should emit an event for:
- salePrice = _newsalecounttoken (#602)
Emit an event for critical parameter changes.

Additional information: link

NINJA.extractBNB()._owner (#582) lacks a zero-check on :
- _owner.transfer(address(this).balance) (#583)
Check that the address is not zero.

Additional information: link

SafeMath.div(uint256,uint256,string) (#136-139) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version0.6.8 (#23) allows old versions
solc-0.6.8 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

NINJA (#237-606) should inherit from IERC20 (#142-209)
Inherit from the missing interface or contract.

Additional information: link

Function NINJA.Liquidity(address) (#382-385) is not in mixedCase
Parameter NINJA.airdrop(address)._refer (#545) is not in mixedCase
Parameter NINJA.buy(address)._refer (#560) is not in mixedCase
Function NINJA.Airdroptokennumbers(uint256) (#586-588) is not in mixedCase
Parameter NINJA.Airdroptokennumbers(uint256)._newairdrop (#586) is not in mixedCase
Parameter NINJA.setreferETHpercent(uint256)._neweth (#590) is not in mixedCase
Parameter NINJA.setETHairdrop(uint256)._newethprice (#594) is not in mixedCase
Parameter NINJA.setrefertokenpercent(uint256)._newairdroppercent (#598) is not in mixedCase
Parameter NINJA.setsaletoken(uint256)._newsalecounttoken (#601) is not in mixedCase
Variable NINJA._referEth (#249) is not in mixedCase
Variable NINJA._referToken (#250) is not in mixedCase
Variable NINJA._airdropEth (#251) is not in mixedCase
Variable NINJA._airdropToken (#252) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Contract ticker (CRYPTO NINJA) 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.

NINJA._decimals (#243) should be constant
NINJA._name (#241) should be constant
NINJA._swAirdrop (#247) should be constant
NINJA._swSale (#248) should be constant
NINJA._symbol (#242) should be constant
NINJA._totalSupply (#240) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

NINJA.extractBNB()._owner (#582) shadows:
- NINJA._owner (#244) (state variable)
Rename the local variables that shadow another component.

Additional information: link

NINJA.slitherConstructorVariables() (#237-606) uses literals with too many digits:
- _totalSupply = 10000000000000000000000000 (#240)
NINJA.slitherConstructorVariables() (#237-606) uses literals with too many digits:
- _airdropEth = 3000000000000000 (#251)
NINJA.slitherConstructorVariables() (#237-606) uses literals with too many digits:
- _airdropToken = 1000000000000000000 (#252)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

name() should be declared external:
- NINJA.name() (#300-302)
symbol() should be declared external:
- NINJA.symbol() (#315-317)
decimals() should be declared external:
- NINJA.decimals() (#335-337)
cap() should be declared external:
- NINJA.cap() (#342-344)
totalSupply() should be declared external:
- NINJA.totalSupply() (#349-351)
balanceOf(address) should be declared external:
- NINJA.balanceOf(address) (#356-358)
allowance(address,address) should be declared external:
- NINJA.allowance(address,address) (#363-365)
authNum(uint256) should be declared external:
- NINJA.authNum(uint256) (#367-371)
transferOwnership(address) should be declared external:
- NINJA.transferOwnership(address) (#377-380)
Liquidity(address) should be declared external:
- NINJA.Liquidity(address) (#382-385)
setAuth(address,address) should be declared external:
- NINJA.setAuth(address,address) (#387-392)
addLiquidity(address) should be declared external:
- NINJA.addLiquidity(address) (#394-398)
transferFrom(address,address,uint256) should be declared external:
- NINJA.transferFrom(address,address,uint256) (#447-451)
approve(address,uint256) should be declared external:
- NINJA.approve(address,uint256) (#460-463)
clearETH() should be declared external:
- NINJA.clearETH() (#465-469)
black(address,uint8) should be declared external:
- NINJA.black(address,uint8) (#471-473)
transfer(address,uint256) should be declared external:
- NINJA.transfer(address,uint256) (#529-532)
getBlock() should be declared external:
- NINJA.getBlock() (#534-543)
airdrop(address) should be declared external:
- NINJA.airdrop(address) (#545-558)
buy(address) should be declared external:
- NINJA.buy(address) (#560-575)
recoverERC20(address,uint256) should be declared external:
- NINJA.recoverERC20(address,uint256) (#577-579)
Airdroptokennumbers(uint256) should be declared external:
- NINJA.Airdroptokennumbers(uint256) (#586-588)
setreferETHpercent(uint256) should be declared external:
- NINJA.setreferETHpercent(uint256) (#590-592)
setETHairdrop(uint256) should be declared external:
- NINJA.setETHairdrop(uint256) (#594-596)
setrefertokenpercent(uint256) should be declared external:
- NINJA.setrefertokenpercent(uint256) (#598-600)
setsaletoken(uint256) should be declared external:
- NINJA.setsaletoken(uint256) (#601-603)
Use the external attribute for functions never called from the 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.

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

Token is deployed only at one blockchain

Token has only one trading pair

BscScan page for the token does not contain additional info: website, socials, description, etc.

Additional information: link

Unable to find token on CoinGecko

Additional information: link

Unable to find token on CoinMarketCap

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Unable to find token/project description on the website or on BscScan, CoinMarketCap

Unable to find token contract audit

Unable to find audit 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

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

Additional information: link

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

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

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank