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MAIR [MetaAir] Token

About MAIR

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Token 3 months
CoinMarketCap 3 months
[CoinGecko] alert: The following token has a variable tax function on the smart contract - which allows contract owners to change tax rates post deployment.
Do your own research and be careful if you are trading this token.
white paper

METAAIR is a blockchain decentralized platform based on binance. MetaAir is developing an ecosystem that has the following features like Staking, Launchpad, Defi and community focused. METAAIR Metaverse is offering the buying and selling of Virtual land, Creating Avatars, hosting musical events, and playing, watching, and enjoying matches in it. Each avatar is tokenized as a unique non-fungible token on the Binance Smart Chain. Because every avatar on METAAIR is an NFT, or in other words, a digital asset that cannot be repeated. It can be traced to check the original creator and the current owner easily. Providing a way to prove your virtual identity across the metaverse.

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Laser Scorebeta Last Audit: 23 February 2022

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Code:


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

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

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


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.

METAAIR._transfer(address,address,uint256).lastProcessedIndex (MetaAir.sol#451) is a local variable never initialized
METAAIR.setBulkBot(address[],bool).i (MetaAir.sol#269) 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
DividendPayingToken._withdrawDividendOfUser(address).success_scope_0 (DividendPayingToken.sol#85) 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

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

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

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

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

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

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

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).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)
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)
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(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(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(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

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

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

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

Holders:


Average 30d PancakeSwap liquidity 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.

Contract has 6% buy tax and 12% sell tax.
Taxes are high (over 10%) but contract ownership is renounced.


Token is deployed only at one blockchain


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

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Additional information: link


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


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


Young tokens have high risks of price dump / death


Young tokens have high risks of price dump / death


Token has relatively low CoinMarketCap rank

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