Santa [Santa Coin] Token

SantaCoin.buyTokens(uint256,address) (#675-686) sends eth to arbitrary user
Dangerous calls:
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#680-685)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in SantaCoin._transferFrom(address,address,uint256) (#529-552):
External calls:
- swapBack() (#534)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#614-620)
- distributor.deposit{value: amountBNBReflection}() (#630)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#636-643)
- triggerAutoBuyback() (#535)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#680-685)
External calls sending eth:
- swapBack() (#534)
- distributor.deposit{value: amountBNBReflection}() (#630)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#631)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#636-643)
- triggerAutoBuyback() (#535)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#680-685)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#539)
- _balances[recipient] = _balances[recipient].add(amountReceived) (#543)
- amountReceived = takeFee(sender,recipient,amount) (#541)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#591)
- triggerAutoBuyback() (#535)
- inSwap = true (#466)
- inSwap = false (#466)
Apply the check-effects-interactions pattern.

Additional information: link

DividendDistributor.distributeDividend(address) (#356-367) ignores return value by BUSD.transfer(shareholder,amount) (#362)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

Unable to verify that contract auditor is trusted: Certik, Quantstamp, Hacken, Solidity, Paladinsec, Openzeppelin, Verichains

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.

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.

Combination 3: Reentrancy vulnerabilities + Unchecked transfer vulnerability. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

Reentrancy in DividendDistributor.setShare(address,uint256) (#289-303):
External calls:
- distributeDividend(shareholder) (#291)
- BUSD.transfer(shareholder,amount) (#362)
State variables written after the call(s):
- shares[shareholder].amount = amount (#301)
- shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount) (#302)
Apply the check-effects-interactions pattern.

Additional information: link

SantaCoin.swapBack() (#604-646) ignores return value by router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#636-643)
Ensure that all the return values of the function calls are used.

Additional information: link

SantaCoin.setTargetLiquidity(uint256,uint256) (#757-760) should emit an event for:
- targetLiquidity = _target (#758)
- targetLiquidityDenominator = _denominator (#759)
Emit an event for critical parameter changes.

Additional information: link

SantaCoin.setFeeReceivers(address,address)._marketingFeeReceiver (#747) lacks a zero-check on :
- marketingFeeReceiver = _marketingFeeReceiver (#749)
Check that the address is not zero.

Additional information: link

Reentrancy in SantaCoin.triggerZeusBuyback(uint256,bool) (#656-662):
External calls:
- buyTokens(amount,DEAD) (#657)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#680-685)
State variables written after the call(s):
- buybackMultiplierTriggeredAt = block.timestamp (#659)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in SantaCoin.triggerZeusBuyback(uint256,bool) (#656-662):
External calls:
- buyTokens(amount,DEAD) (#657)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#680-685)
Event emitted after the call(s):
- BuybackMultiplierActive(buybackMultiplierLength) (#660)
Apply the check-effects-interactions pattern.

Additional information: link

SantaCoin.isOverLiquified(uint256,uint256) (#779-781) uses timestamp for comparisons
Dangerous comparisons:
- getLiquidityBacking(accuracy) > target (#780)
Avoid relying on block.timestamp.

Additional information: link

SantaCoin.onlyBuybacker() (#503) compares to a boolean constant:
-require(bool,string)(buyBacker[msg.sender] == true,) (#503)
Remove the equality to the boolean constant.

Additional information: link

DividendDistributor.process(uint256) (#325-349) has costly operations inside a loop:
- currentIndex ++ (#346)
Use a local variable to hold the loop computation result.

Additional information: link

SantaCoin.launched() (#704-706) is never used and should be removed
Remove unused functions.

Additional information: link

SantaCoin.swapThreshold (#464) is set pre-construction with a non-constant function or state variable:
- _totalSupply / 2000
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

solc-0.8.7 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

Variable SantaCoin._allowances (#420) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in SantaCoin.swapBack() (#604-646):
External calls:
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#631)
External calls sending eth:
- distributor.deposit{value: amountBNBReflection}() (#630)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#631)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#636-643)
Event emitted after the call(s):
- AutoLiquify(amountBNBLiquidity,amountToLiquify) (#644)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#186) is too similar to IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#187)
Prevent variables from having similar names.

Additional information: link

SantaCoin.slitherConstructorVariables() (#402-786) uses literals with too many digits:
- distributorGas = 500000 (#461)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

SantaCoin.DEAD_NON_CHECKSUM (#410) is never used in SantaCoin (#402-786)
Remove unused state variables.

Additional information: link

SantaCoin._totalSupply (#416) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

launch() should be declared external:
- SantaCoin.launch() (#708-712)
Use the external attribute for functions never called from the contract.

Additional information: link

Token is deployed only at one blockchain

Token has only one trading pair

Unable to find PancakeSwap trading pair to compute liquidity.

Unable to find PancakeSwap trading pair to compute number of swaps.

Unable to crawl data from the website

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

Additional information: link

Unable to verify token contract address on the website

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find Telegram link on the website

Unable to find Twitter link on the website

Unable to find code repository for the project

Young tokens have high risks of price dump / death

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

Young tokens have high risks of price dump / death

Token has relatively low CoinMarketCap rank