MAIR [MetaAir] Token

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

METAAIR.rescueBEP20Tokens(address) (MetaAir.sol#156-158) ignores return value by IERC20(tokenAddress).transfer(msg.sender,IERC20(tokenAddress).balanceOf(address(this))) (MetaAir.sol#157)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

METAAIR.addLiquidity(uint256,uint256) (MetaAir.sol#524-539) sends eth to arbitrary user
Dangerous calls:
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456):
External calls:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- address(marketingWallet).sendValue(marketingWalletAmt) (MetaAir.sol#480)
- address(operationsWallet).sendValue(operationsAmt) (MetaAir.sol#485)
- address(buybackWallet).sendValue(buybackAmt) (MetaAir.sol#490)
- address(devWallet).sendValue(devAmt) (MetaAir.sol#495)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
State variables written after the call(s):
- super._transfer(from,address(this),swapAmt) (MetaAir.sol#441)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (ERC20.sol#220)
- _balances[recipient] = _balances[recipient].add(amount) (ERC20.sol#221)
- super._transfer(from,to,amount) (MetaAir.sol#443)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (ERC20.sol#220)
- _balances[recipient] = _balances[recipient].add(amount) (ERC20.sol#221)
- swapping = false (MetaAir.sol#422)
Reentrancy in DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94):
External calls:
- success = swapBnbForCustomToken(user,_withdrawableDividend) (DividendPayingToken.sol#75)
- router.swapExactETHForTokens{value: amt}(0,path,user,block.timestamp + 2) (DividendPayingToken.sol#105-109)
- (secondSuccess) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#77)
State variables written after the call(s):
- withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend) (DividendPayingToken.sol#79)
Reentrancy in DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94):
External calls:
- (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
State variables written after the call(s):
- withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend) (DividendPayingToken.sol#87)
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.

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.

Contract ownership is not renounced (belongs to a wallet)

Variable DividendPayingToken._withdrawDividendOfUser(address)._withdrawableDividend (DividendPayingToken.sol#70) is too similar to MetaAirDividendTracker.getAccount(address).withdrawableDividends (MetaAir.sol#616)
Prevent variables from having similar names.

Additional information: link

DividendPayingToken.swapBnbForCustomToken(address,uint256) (DividendPayingToken.sol#100-110) ignores return value by router.swapExactETHForTokens{value: amt}(0,path,user,block.timestamp + 2) (DividendPayingToken.sol#105-109)
METAAIR.claim() (MetaAir.sol#150-152) ignores return value by dividendTracker.processAccount(address(msg.sender),false) (MetaAir.sol#151)
METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456) ignores return value by dividendTracker.process(gas) (MetaAir.sol#451-454)
METAAIR.addLiquidity(uint256,uint256) (MetaAir.sol#524-539) ignores return value by router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
Ensure that all the return values of the function calls are used.

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

METAAIR.currentRewardToken (MetaAir.sol#51) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-bnbToAddLiquidityWith = unitBalance * sellTaxes.liquidity (MetaAir.sol#470)
METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-marketingWalletAmt = unitBalance * 2 * sellTaxes.marketing (MetaAir.sol#478)
METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-operationsAmt = unitBalance * 2 * sellTaxes.operations (MetaAir.sol#483)
METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-buybackAmt = unitBalance * 2 * sellTaxes.buyback (MetaAir.sol#488)
METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-devAmt = unitBalance * 2 * sellTaxes.dev (MetaAir.sol#493)
METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - sellTaxes.liquidity) (MetaAir.sol#469)
-dividends = unitBalance * 2 * sellTaxes.rewards (MetaAir.sol#499)
Consider ordering multiplication before division.

Additional information: link

METAAIR.setBulkBot(address[],bool).i (MetaAir.sol#269) is a local variable never initialized
METAAIR._transfer(address,address,uint256).lastProcessedIndex (MetaAir.sol#451) is a local variable never initialized
DividendPayingToken._withdrawDividendOfUser(address).success_scope_0 (DividendPayingToken.sol#85) is a local variable never initialized
METAAIR._transfer(address,address,uint256).swapAmt (MetaAir.sol#433) is a local variable never initialized
METAAIR._transfer(address,address,uint256).iterations (MetaAir.sol#451) is a local variable never initialized
METAAIR._transfer(address,address,uint256).claims (MetaAir.sol#451) is a local variable never initialized
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

DividendPayingToken.constructor(string,string)._name (DividendPayingToken.sol#43) shadows:
- ERC20._name (ERC20.sol#42) (state variable)
DividendPayingToken.constructor(string,string)._symbol (DividendPayingToken.sol#43) shadows:
- ERC20._symbol (ERC20.sol#43) (state variable)
DividendPayingToken.dividendOf(address)._owner (DividendPayingToken.sol#115) shadows:
- Ownable._owner (Ownable.sol#8) (state variable)
DividendPayingToken.withdrawableDividendOf(address)._owner (DividendPayingToken.sol#122) shadows:
- Ownable._owner (Ownable.sol#8) (state variable)
DividendPayingToken.withdrawnDividendOf(address)._owner (DividendPayingToken.sol#129) shadows:
- Ownable._owner (Ownable.sol#8) (state variable)
DividendPayingToken.accumulativeDividendOf(address)._owner (DividendPayingToken.sol#139) shadows:
- Ownable._owner (Ownable.sol#8) (state variable)
Rename the local variables that shadow another component.

Additional information: link

METAAIR.setMaxWallet(uint256) (MetaAir.sol#213-215) should emit an event for:
- maxWalletBalance = amount * 10 ** 9 (MetaAir.sol#214)
METAAIR.setSwapTokensAtAmount(uint256) (MetaAir.sol#223-225) should emit an event for:
- swapTokensAtAmount = amount * 10 ** 9 (MetaAir.sol#224)
METAAIR.setMaxBuyAndSellLimits(uint256,uint256) (MetaAir.sol#239-242) should emit an event for:
- maxBuyAmount = maxBuy * 10 ** decimals() (MetaAir.sol#240)
- maxSellAmount = maxSell * 10 ** decimals() (MetaAir.sol#241)
METAAIR.setCooldownTime(uint256,uint256) (MetaAir.sol#250-253) should emit an event for:
- coolDownTime = timeInSeconds (MetaAir.sol#251)
- coolDownBalance = balance * 10 ** decimals() (MetaAir.sol#252)
METAAIR.setAntiBotBlocks(uint256) (MetaAir.sol#274-276) should emit an event for:
- antiBotBlocks = numberOfBlocks (MetaAir.sol#275)
Emit an event for critical parameter changes.

Additional information: link

METAAIR.setMarketingWallet(address).newWallet (MetaAir.sol#201) lacks a zero-check on :
- marketingWallet = newWallet (MetaAir.sol#202)
METAAIR.setBuybackWallet(address).newWallet (MetaAir.sol#205) lacks a zero-check on :
- buybackWallet = newWallet (MetaAir.sol#206)
METAAIR.setOperationsWallet(address).newWallet (MetaAir.sol#209) lacks a zero-check on :
- operationsWallet = newWallet (MetaAir.sol#210)
METAAIR.setDevWallet(address).newWallet (MetaAir.sol#217) lacks a zero-check on :
- devWallet = newWallet (MetaAir.sol#218)
DividendPayingToken.setRewardToken(address).newToken (DividendPayingToken.sol#96) lacks a zero-check on :
- rewardToken = newToken (DividendPayingToken.sol#97)
Check that the address is not zero.

Additional information: link

DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94) has external calls inside a loop: rewardToken != router.WETH() (DividendPayingToken.sol#74)
DividendPayingToken.swapBnbForCustomToken(address,uint256) (DividendPayingToken.sol#100-110) has external calls inside a loop: path[0] = router.WETH() (DividendPayingToken.sol#102)
DividendPayingToken.swapBnbForCustomToken(address,uint256) (DividendPayingToken.sol#100-110) has external calls inside a loop: router.swapExactETHForTokens{value: amt}(0,path,user,block.timestamp + 2) (DividendPayingToken.sol#105-109)
DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94) has external calls inside a loop: (secondSuccess) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#77)
DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94) has external calls inside a loop: (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
Favor pull over push strategy for external calls.

Additional information: link

Variable 'DividendPayingToken._withdrawDividendOfUser(address).success (DividendPayingToken.sol#75)' in DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94) potentially used before declaration: (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
Variable 'METAAIR._transfer(address,address,uint256).lastProcessedIndex (MetaAir.sol#451)' in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456) potentially used before declaration: ProcessedDividendTracker(iterations,claims,lastProcessedIndex,true,gas,tx.origin) (MetaAir.sol#452)
Variable 'METAAIR._transfer(address,address,uint256).claims (MetaAir.sol#451)' in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456) potentially used before declaration: ProcessedDividendTracker(iterations,claims,lastProcessedIndex,true,gas,tx.origin) (MetaAir.sol#452)
Variable 'METAAIR._transfer(address,address,uint256).iterations (MetaAir.sol#451)' in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456) potentially used before declaration: ProcessedDividendTracker(iterations,claims,lastProcessedIndex,true,gas,tx.origin) (MetaAir.sol#452)
Move all variable declarations prior to any usage of the variable, and ensure that reaching a variable declaration does not depend on some conditional if it is used unconditionally.

Additional information: link

Reentrancy in METAAIR.constructor() (MetaAir.sol#97-130):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (MetaAir.sol#103)
State variables written after the call(s):
- pair = _pair (MetaAir.sol#106)
- router = _router (MetaAir.sol#105)
Reentrancy in METAAIR.constructor() (MetaAir.sol#97-130):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (MetaAir.sol#103)
- _setAutomatedMarketMakerPair(_pair,true) (MetaAir.sol#108)
- dividendTracker.excludeFromDividends(newPair,true) (MetaAir.sol#292)
- dividendTracker.excludeFromDividends(address(dividendTracker),true) (MetaAir.sol#112)
- dividendTracker.excludeFromDividends(address(this),true) (MetaAir.sol#113)
- dividendTracker.excludeFromDividends(deadWallet,true) (MetaAir.sol#114)
- dividendTracker.excludeFromDividends(address(_router),true) (MetaAir.sol#115)
State variables written after the call(s):
- _mint(owner(),1e9 * (10 ** 9)) (MetaAir.sol#129)
- _balances[account] = _balances[account].add(amount) (ERC20.sol#240)
- excludeFromFees(owner(),true) (MetaAir.sol#118)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- excludeFromFees(address(this),true) (MetaAir.sol#119)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- excludeFromFees(marketingWallet,true) (MetaAir.sol#120)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- excludeFromFees(operationsWallet,true) (MetaAir.sol#121)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- excludeFromFees(buybackWallet,true) (MetaAir.sol#122)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- excludeFromFees(devWallet,true) (MetaAir.sol#123)
- _isExcludedFromFees[account] = excluded (MetaAir.sol#178)
- _mint(owner(),1e9 * (10 ** 9)) (MetaAir.sol#129)
- _totalSupply = _totalSupply.add(amount) (ERC20.sol#239)
Reentrancy in MetaAirDividendTracker.processAccount(address,bool) (MetaAir.sol#749-759):
External calls:
- amount = _withdrawDividendOfUser(account) (MetaAir.sol#750)
- router.swapExactETHForTokens{value: amt}(0,path,user,block.timestamp + 2) (DividendPayingToken.sol#105-109)
- (secondSuccess) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#77)
- (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
State variables written after the call(s):
- lastClaimTimes[account] = block.timestamp (MetaAir.sol#753)
Reentrancy in METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504):
External calls:
- swapTokensForBNB(toSwap) (MetaAir.sol#466)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
External calls sending eth:
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
State variables written after the call(s):
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- _allowances[owner][spender] = amount (ERC20.sol#286)
Reentrancy in METAAIR.updateDividendTracker(address) (MetaAir.sol#133-141):
External calls:
- newDividendTracker.excludeFromDividends(address(newDividendTracker),true) (MetaAir.sol#136)
- newDividendTracker.excludeFromDividends(address(this),true) (MetaAir.sol#137)
- newDividendTracker.excludeFromDividends(owner(),true) (MetaAir.sol#138)
- newDividendTracker.excludeFromDividends(address(router),true) (MetaAir.sol#139)
State variables written after the call(s):
- dividendTracker = newDividendTracker (MetaAir.sol#140)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in METAAIR._setAutomatedMarketMakerPair(address,bool) (MetaAir.sol#287-296):
External calls:
- dividendTracker.excludeFromDividends(newPair,true) (MetaAir.sol#292)
Event emitted after the call(s):
- SetAutomatedMarketMakerPair(newPair,value) (MetaAir.sol#295)
Reentrancy in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456):
External calls:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- address(marketingWallet).sendValue(marketingWalletAmt) (MetaAir.sol#480)
- address(operationsWallet).sendValue(operationsAmt) (MetaAir.sol#485)
- address(buybackWallet).sendValue(buybackAmt) (MetaAir.sol#490)
- address(devWallet).sendValue(devAmt) (MetaAir.sol#495)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (ERC20.sol#222)
- super._transfer(from,to,amount) (MetaAir.sol#443)
- Transfer(sender,recipient,amount) (ERC20.sol#222)
- super._transfer(from,address(this),swapAmt) (MetaAir.sol#441)
Reentrancy in METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456):
External calls:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- address(marketingWallet).sendValue(marketingWalletAmt) (MetaAir.sol#480)
- address(operationsWallet).sendValue(operationsAmt) (MetaAir.sol#485)
- address(buybackWallet).sendValue(buybackAmt) (MetaAir.sol#490)
- address(devWallet).sendValue(devAmt) (MetaAir.sol#495)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
- dividendTracker.setBalance(from,balanceOf(from)) (MetaAir.sol#445)
- dividendTracker.setBalance(to,balanceOf(to)) (MetaAir.sol#446)
- dividendTracker.process(gas) (MetaAir.sol#451-454)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,swapTax) (MetaAir.sol#419)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
Event emitted after the call(s):
- ProcessedDividendTracker(iterations,claims,lastProcessedIndex,true,gas,tx.origin) (MetaAir.sol#452)
Reentrancy in METAAIR.constructor() (MetaAir.sol#97-130):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (MetaAir.sol#103)
- _setAutomatedMarketMakerPair(_pair,true) (MetaAir.sol#108)
- dividendTracker.excludeFromDividends(newPair,true) (MetaAir.sol#292)
Event emitted after the call(s):
- SetAutomatedMarketMakerPair(newPair,value) (MetaAir.sol#295)
- _setAutomatedMarketMakerPair(_pair,true) (MetaAir.sol#108)
Reentrancy in METAAIR.constructor() (MetaAir.sol#97-130):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (MetaAir.sol#103)
- _setAutomatedMarketMakerPair(_pair,true) (MetaAir.sol#108)
- dividendTracker.excludeFromDividends(newPair,true) (MetaAir.sol#292)
- dividendTracker.excludeFromDividends(address(dividendTracker),true) (MetaAir.sol#112)
- dividendTracker.excludeFromDividends(address(this),true) (MetaAir.sol#113)
- dividendTracker.excludeFromDividends(deadWallet,true) (MetaAir.sol#114)
- dividendTracker.excludeFromDividends(address(_router),true) (MetaAir.sol#115)
Event emitted after the call(s):
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(marketingWallet,true) (MetaAir.sol#120)
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(address(this),true) (MetaAir.sol#119)
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(devWallet,true) (MetaAir.sol#123)
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(buybackWallet,true) (MetaAir.sol#122)
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(operationsWallet,true) (MetaAir.sol#121)
- ExcludeFromFees(account,excluded) (MetaAir.sol#180)
- excludeFromFees(owner(),true) (MetaAir.sol#118)
- Transfer(address(0),account,amount) (ERC20.sol#241)
- _mint(owner(),1e9 * (10 ** 9)) (MetaAir.sol#129)
Reentrancy in MetaAirDividendTracker.processAccount(address,bool) (MetaAir.sol#749-759):
External calls:
- amount = _withdrawDividendOfUser(account) (MetaAir.sol#750)
- router.swapExactETHForTokens{value: amt}(0,path,user,block.timestamp + 2) (DividendPayingToken.sol#105-109)
- (secondSuccess) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#77)
- (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
Event emitted after the call(s):
- Claim(account,amount,automatic) (MetaAir.sol#754)
Reentrancy in METAAIR.processDividendTracker(uint256) (MetaAir.sol#143-146):
External calls:
- (iterations,claims,lastProcessedIndex) = dividendTracker.process(gas) (MetaAir.sol#144)
Event emitted after the call(s):
- ProcessedDividendTracker(iterations,claims,lastProcessedIndex,false,gas,tx.origin) (MetaAir.sol#145)
Reentrancy in METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504):
External calls:
- swapTokensForBNB(toSwap) (MetaAir.sol#466)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
External calls sending eth:
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
Event emitted after the call(s):
- Approval(owner,spender,amount) (ERC20.sol#287)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
Reentrancy in METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504):
External calls:
- swapTokensForBNB(toSwap) (MetaAir.sol#466)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (MetaAir.sol#514-520)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- address(marketingWallet).sendValue(marketingWalletAmt) (MetaAir.sol#480)
- address(operationsWallet).sendValue(operationsAmt) (MetaAir.sol#485)
- address(buybackWallet).sendValue(buybackAmt) (MetaAir.sol#490)
- address(devWallet).sendValue(devAmt) (MetaAir.sol#495)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
External calls sending eth:
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (MetaAir.sol#474)
- router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (MetaAir.sol#530-537)
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
Event emitted after the call(s):
- SendDividends(tokens,dividends) (MetaAir.sol#502)
Apply the check-effects-interactions pattern.

Additional information: link

METAAIR._transfer(address,address,uint256) (MetaAir.sol#379-456) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(timePassed > coolDownTime,Cooldown is active. Please wait) (MetaAir.sol#393)
MetaAirDividendTracker.getAccount(address) (MetaAir.sol#611-654) uses timestamp for comparisons
Dangerous comparisons:
- nextClaimTime > block.timestamp (MetaAir.sol#651-653)
MetaAirDividendTracker.canAutoClaim(uint256) (MetaAir.sol#675-681) uses timestamp for comparisons
Dangerous comparisons:
- lastClaimTime > block.timestamp (MetaAir.sol#676)
- block.timestamp.sub(lastClaimTime) >= claimWait (MetaAir.sol#680)
Avoid relying on block.timestamp.

Additional information: link

METAAIR.setTradingEnabled(bool) (MetaAir.sol#255-258) compares to a boolean constant:
-startTradingBlock == 0 && _enabled == true (MetaAir.sol#257)
MetaAirDividendTracker.excludeFromDividends(address,bool) (MetaAir.sol#576-589) compares to a boolean constant:
-value == true (MetaAir.sol#579)
Remove the equality to the boolean constant.

Additional information: link

Context._msgData() (Context.sol#20-23) is never used and should be removed
DividendPayingToken._transfer(address,address,uint256) (DividendPayingToken.sol#149-155) is never used and should be removed
SafeMath.div(uint256,uint256) (SafeMath.sol#90-92) is never used and should be removed
SafeMath.div(uint256,uint256,string) (SafeMath.sol#106-112) is never used and should be removed
SafeMath.mod(uint256,uint256) (SafeMath.sol#126-128) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (SafeMath.sol#142-145) is never used and should be removed
SafeMathInt.abs(int256) (SafeMath.sol#200-203) is never used and should be removed
SafeMathInt.div(int256,int256) (SafeMath.sol#171-177) is never used and should be removed
SafeMathInt.mul(int256,int256) (SafeMath.sol#159-166) is never used and should be removed
Remove unused functions.

Additional information: link

Low level call in DividendPayingToken._withdrawDividendOfUser(address) (DividendPayingToken.sol#69-94):
- (secondSuccess) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#77)
- (success) = user.call{gas: 3000,value: _withdrawableDividend}() (DividendPayingToken.sol#85)
Low level call in Address.sendValue(address,uint256) (MetaAir.sol#19-24):
- (success) = recipient.call{value: amount}() (MetaAir.sol#22)
Low level call in METAAIR.swapAndLiquify(uint256,uint256) (MetaAir.sol#458-504):
- (success) = address(dividendTracker).call{value: dividends}() (MetaAir.sol#501)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Parameter DividendPayingToken.dividendOf(address)._owner (DividendPayingToken.sol#115) is not in mixedCase
Parameter DividendPayingToken.withdrawableDividendOf(address)._owner (DividendPayingToken.sol#122) is not in mixedCase
Parameter DividendPayingToken.withdrawnDividendOf(address)._owner (DividendPayingToken.sol#129) is not in mixedCase
Parameter DividendPayingToken.accumulativeDividendOf(address)._owner (DividendPayingToken.sol#139) is not in mixedCase
Constant DividendPayingToken.magnitude (DividendPayingToken.sol#20) is not in UPPER_CASE_WITH_UNDERSCORES
Function IRouter.WETH() (IDex.sol#16) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._rewards (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._marketing (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._liquidity (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._operations (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._buyback (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setBuyTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._dev (MetaAir.sol#227) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._rewards (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._marketing (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._liquidity (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._operations (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._buyback (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSellTaxes(uint256,uint256,uint256,uint256,uint256,uint256)._dev (MetaAir.sol#231) is not in mixedCase
Parameter METAAIR.setSwapEnabled(bool)._enabled (MetaAir.sol#246) is not in mixedCase
Parameter METAAIR.setTradingEnabled(bool)._enabled (MetaAir.sol#255) is not in mixedCase
Constant METAAIR.deadWallet (MetaAir.sol#40) is not in UPPER_CASE_WITH_UNDERSCORES
Variable METAAIR._isBot (MetaAir.sol#76) is not in mixedCase
Parameter MetaAirDividendTracker.getAccount(address)._account (MetaAir.sol#611) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

METAAIR.setGasForProcessing(uint256) (MetaAir.sol#301-306) uses literals with too many digits:
- require(bool,string)(newValue >= 200000 && newValue <= 500000,MetaAir: gasForProcessing must be between 200,000 and 500,000) (MetaAir.sol#302)
METAAIR.slitherConstructorVariables() (MetaAir.sol#27-541) uses literals with too many digits:
- gasForProcessing = 300000 (MetaAir.sol#70)
METAAIR.slitherConstructorVariables() (MetaAir.sol#27-541) uses literals with too many digits:
- coolDownBalance = 5000000 * 10 ** 9 (MetaAir.sol#80)
METAAIR.slitherConstructorConstantVariables() (MetaAir.sol#27-541) uses literals with too many digits:
- deadWallet = 0x000000000000000000000000000000000000dEaD (MetaAir.sol#40)
MetaAirDividendTracker.getAccountAtIndex(uint256) (MetaAir.sol#656-673) uses literals with too many digits:
- (0x0000000000000000000000000000000000000000,- 1,- 1,0,0,0,0,0) (MetaAir.sol#667)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

METAAIR.currentRewardToken (MetaAir.sol#51) is never used in METAAIR (MetaAir.sol#27-541)
SafeMathInt.MAX_INT256 (SafeMath.sol#154) is never used in SafeMathInt (SafeMath.sol#152-210)
Remove unused state variables.

Additional information: link

dividendOf(address) should be declared external:
- DividendPayingToken.dividendOf(address) (DividendPayingToken.sol#115-117)
withdrawnDividendOf(address) should be declared external:
- DividendPayingToken.withdrawnDividendOf(address) (DividendPayingToken.sol#129-131)
name() should be declared external:
- ERC20.name() (ERC20.sol#62-64)
symbol() should be declared external:
- ERC20.symbol() (ERC20.sol#70-72)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (ERC20.sol#113-116)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (ERC20.sol#121-123)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (ERC20.sol#132-135)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (ERC20.sol#150-158)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (ERC20.sol#172-175)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (ERC20.sol#191-194)
get(IterableMapping.Map,address) should be declared external:
- IterableMapping.get(IterableMapping.Map,address) (IterableMapping.sol#13-15)
getIndexOfKey(IterableMapping.Map,address) should be declared external:
- IterableMapping.getIndexOfKey(IterableMapping.Map,address) (IterableMapping.sol#17-22)
getKeyAtIndex(IterableMapping.Map,uint256) should be declared external:
- IterableMapping.getKeyAtIndex(IterableMapping.Map,uint256) (IterableMapping.sol#24-26)
size(IterableMapping.Map) should be declared external:
- IterableMapping.size(IterableMapping.Map) (IterableMapping.sol#30-32)
updateDividendTracker(address) should be declared external:
- METAAIR.updateDividendTracker(address) (MetaAir.sol#133-141)
excludeMultipleAccountsFromFees(address[],bool) should be declared external:
- METAAIR.excludeMultipleAccountsFromFees(address[],bool) (MetaAir.sol#183-188)
isExcludedFromFees(address) should be declared external:
- METAAIR.isExcludedFromFees(address) (MetaAir.sol#325-327)
withdrawableDividendOf(address) should be declared external:
- METAAIR.withdrawableDividendOf(address) (MetaAir.sol#329-331)
dividendTokenBalanceOf(address) should be declared external:
- METAAIR.dividendTokenBalanceOf(address) (MetaAir.sol#337-339)
getAccountAtIndex(uint256) should be declared external:
- MetaAirDividendTracker.getAccountAtIndex(uint256) (MetaAir.sol#656-673)
setBalance(address,uint256) should be declared external:
- MetaAirDividendTracker.setBalance(address,uint256) (MetaAir.sol#684-700)
process(uint256) should be declared external:
- MetaAirDividendTracker.process(uint256) (MetaAir.sol#702-747)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (Ownable.sol#43-46)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (Ownable.sol#52-56)
Use the external attribute for functions never called from the contract.

Additional information: link

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

Contract has 2% buy tax and 12% sell tax.
Taxes are suspiciously high (over 10%) and contract ownership is not renounced. Token has a high risk of becoming a honeypot.

Token is deployed only at one blockchain

Average 30d PancakeSwap liquidity is low.

Average 30d PancakeSwap volume is low.

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

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

Additional information: link

Unable to find token contract audit

Unable to find audit link on the website

Token is not listed at Mobula.Finance

Additional information: link

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death

Token has relatively low CoinGecko rank

Young tokens have high risks of price dump / death

Token has relatively low CoinMarketCap rank