APOC [Apocalypse] Token

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

Apocalypse.swapBack() (#1300-1332) sends eth to arbitrary user
Dangerous calls:
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
Apocalypse.buyTokens(uint256,address) (#1377-1385) sends eth to arbitrary user
Dangerous calls:
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in Apocalypse._transferFrom(address,address,uint256) (#1110-1130):
External calls:
- swapBack() (#1116)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#1310)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
- triggerAutoBuyback() (#1119)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
External calls sending eth:
- swapBack() (#1116)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
- triggerAutoBuyback() (#1119)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#1122)
- _balances[recipient] = _balances[recipient].add(amountReceived) (#1126)
- amountReceived = takeFee(sender,recipient,amount) (#1124)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#1247)
- triggerAutoBuyback() (#1119)
- inSwap = true (#934)
- inSwap = false (#936)
Apply the check-effects-interactions pattern.

Additional information: link

RewardPoolDistributor.migratePool(address) (#805-809) ignores return value by rewardToken.transfer(_newPool,rewardBalance) (#808)
RewardPoolDistributor.withdrawReward(uint256) (#832-843) ignores return value by rewardToken.transfer(_msgSender(),_amount) (#839)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

RewardPoolDistributor.distributeReward(address,uint256) (#824-830) uses a dangerous strict equality:
- needResetTimeLimit(_msgSender()) == true (#826)
RewardPoolDistributor.withdrawReward(uint256) (#832-843) uses a dangerous strict equality:
- needResetTimeLimit(_msgSender()) == true (#833)
Don't use strict equality to determine if an account has enough Ether or tokens.

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.

RewardPoolDistributor.resetTimeLimit(address) (#845-855) performs a multiplication on the result of a division:
-timeCycle = timeDifference.div(timeLimit) (#847)
-rewards[_user].currentLimit += dailyLimit.mul(timeCycle) (#852)
RewardPoolDistributor.resetTimeLimit(address) (#845-855) performs a multiplication on the result of a division:
-timeCycle = timeDifference.div(timeLimit) (#847)
-rewards[_user].limitReset += timeLimit.mul(timeCycle) (#853)
Apocalypse._setFees(uint256,uint256,uint256,uint256,uint256) (#1197-1211) performs a multiplication on the result of a division:
-require(bool,string)(totalFee < feeDenominator.div(100).mul(10),Total fee should not be greater than 10%.) (#1210)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in Apocalypse.setRewardPoolDistributor(address) (#1263-1267):
External calls:
- distributor.unInitialized(false) (#1264)
- distributor.setTokenAddress(_msgSender()) (#1265)
State variables written after the call(s):
- distributor = RewardPoolDistributor(distributor_) (#1266)
Reentrancy in RewardPoolDistributor.withdrawReward(uint256) (#832-843):
External calls:
- rewardToken.transfer(_msgSender(),_amount) (#839)
State variables written after the call(s):
- rewards[_msgSender()].totalReceived = rewards[_msgSender()].totalReceived.add(_amount) (#840)
- rewards[_msgSender()].totalAccumulated = rewards[_msgSender()].totalAccumulated.sub(_amount) (#841)
- rewards[_msgSender()].currentLimit = rewards[_msgSender()].currentLimit.sub(_amount) (#842)
Apply the check-effects-interactions pattern.

Additional information: link

Apocalypse.swapBack() (#1300-1332) ignores return value by router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
Ensure that all the return values of the function calls are used.

Additional information: link

RewardPoolDistributor.setTokenAddress(address).token_ (#793) lacks a zero-check on :
- _token = token_ (#794)
Apocalypse.constructor(string,string,uint8,uint256,RewardPoolDistributor,address,address,uint256[5]).rewardToken_ (#952) lacks a zero-check on :
- rewardToken = rewardToken_ (#961)
Apocalypse.setFeeReceivers(address,address)._autoLiquidityReceiver (#1216) lacks a zero-check on :
- autoLiquidityReceiver = _autoLiquidityReceiver (#1217)
Apocalypse.setFeeReceivers(address,address)._marketingFeeReceiver (#1216) lacks a zero-check on :
- marketingFeeReceiver = _marketingFeeReceiver (#1218)
Check that the address is not zero.

Additional information: link

Reentrancy in Apocalypse.constructor(string,string,uint8,uint256,RewardPoolDistributor,address,address,uint256[5]) (#946-986):
External calls:
- pair = IUniswapV2Factory(router.factory()).createPair(address(this),router.WETH()) (#963)
State variables written after the call(s):
- _allowances[address(this)][address(router)] = _totalSupply (#978)
- _allowances[address(this)][address(pair)] = _totalSupply (#979)
- _balances[_msgSender()] = _totalSupply (#981)
- autoLiquidityReceiver = _msgSender() (#975)
- buyBacker[_msgSender()] = true (#973)
- _initializeFees(feeSettings_) (#965)
- buybackFee = _buybackFee (#1205)
- _initializeLiquidityBuyBack() (#966)
- buybackMultiplierDenominator = 100 (#1276)
- _initializeLiquidityBuyBack() (#966)
- buybackMultiplierLength = 1800 (#1277)
- _initializeLiquidityBuyBack() (#966)
- buybackMultiplierNumerator = 200 (#1275)
- _initializeDistributor(distributor_) (#967)
- distributor = RewardPoolDistributor(distributor_) (#1256)
- _initializeFees(feeSettings_) (#965)
- feeDenominator = _feeDenominator (#1209)
- isFeeExempt[_msgSender()] = true (#972)
- _initializeFees(feeSettings_) (#965)
- liquidityFee = _liquidityFee (#1204)
- _initializeFees(feeSettings_) (#965)
- marketingFee = _marketingFee (#1207)
- marketingFeeReceiver = _msgSender() (#976)
- _initializeFees(feeSettings_) (#965)
- rewardFee = _rewardFee (#1206)
- swapEnabled = true (#969)
- swapThreshold = _totalSupply / 20000 (#970)
- _initializeLiquidityBuyBack() (#966)
- targetLiquidity = 25 (#1272)
- _initializeLiquidityBuyBack() (#966)
- targetLiquidityDenominator = 100 (#1273)
- _initializeFees(feeSettings_) (#965)
- totalFee = _liquidityFee.add(_buybackFee).add(_rewardFee).add(_marketingFee) (#1208)
Reentrancy in Apocalypse.triggerAutoBuyback() (#1360-1367):
External calls:
- buyTokens(autoBuybackAmount,DEAD) (#1361)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
State variables written after the call(s):
- autoBuybackAccumulator = autoBuybackAccumulator.add(autoBuybackAmount) (#1363)
- autoBuybackBlockLast = block.number (#1362)
- autoBuybackEnabled = false (#1365)
Reentrancy in Apocalypse.triggerZeusBuyback(uint256,bool) (#1369-1375):
External calls:
- buyTokens(amount,DEAD) (#1370)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
State variables written after the call(s):
- buybackMultiplierTriggeredAt = block.timestamp (#1372)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Apocalypse._transferFrom(address,address,uint256) (#1110-1130):
External calls:
- swapBack() (#1116)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#1310)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
- triggerAutoBuyback() (#1119)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
External calls sending eth:
- swapBack() (#1116)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
- triggerAutoBuyback() (#1119)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount) (#1248)
- amountReceived = takeFee(sender,recipient,amount) (#1124)
- Transfer(sender,recipient,amountReceived) (#1128)
Reentrancy in Apocalypse.constructor(string,string,uint8,uint256,RewardPoolDistributor,address,address,uint256[5]) (#946-986):
External calls:
- pair = IUniswapV2Factory(router.factory()).createPair(address(this),router.WETH()) (#963)
Event emitted after the call(s):
- TokenCreated(_msgSender(),address(this)) (#984)
- Transfer(address(0),_msgSender(),_totalSupply) (#982)
Reentrancy in Apocalypse.swapBack() (#1300-1332):
External calls:
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#1310)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
External calls sending eth:
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
Event emitted after the call(s):
- AutoLiquify(amountBNBLiquidity,amountToLiquify) (#1330)
Reentrancy in Apocalypse.triggerZeusBuyback(uint256,bool) (#1369-1375):
External calls:
- buyTokens(amount,DEAD) (#1370)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
Event emitted after the call(s):
- BuybackMultiplierActive(buybackMultiplierLength) (#1373)
Apply the check-effects-interactions pattern.

Additional information: link

RewardPoolDistributor.distributeReward(address,uint256) (#824-830) uses timestamp for comparisons
Dangerous comparisons:
- needResetTimeLimit(_msgSender()) == true (#826)
RewardPoolDistributor.withdrawReward(uint256) (#832-843) uses timestamp for comparisons
Dangerous comparisons:
- needResetTimeLimit(_msgSender()) == true (#833)
RewardPoolDistributor.needResetTimeLimit(address) (#857-859) uses timestamp for comparisons
Dangerous comparisons:
- block.timestamp >= rewards[_user].limitReset.add(timeLimit) (#858)
Apocalypse.isOverLiquified(uint256,uint256) (#1161-1163) uses timestamp for comparisons
Dangerous comparisons:
- getLiquidityBacking(accuracy) > target (#1162)
Apocalypse.getMultipliedFee() (#1235-1242) uses timestamp for comparisons
Dangerous comparisons:
- buybackMultiplierTriggeredAt.add(buybackMultiplierLength) > block.timestamp (#1236)
Avoid relying on block.timestamp.

Additional information: link

Address.isContract(address) (#52-61) uses assembly
- INLINE ASM (#57-59)
Address.verifyCallResult(bool,bytes,string) (#199-214) uses assembly
- INLINE ASM (#206-209)
Do not use evm assembly.

Additional information: link

RewardPoolDistributor.distributeReward(address,uint256) (#824-830) compares to a boolean constant:
-needResetTimeLimit(_msgSender()) == true (#826)
RewardPoolDistributor.withdrawReward(uint256) (#832-843) compares to a boolean constant:
-needResetTimeLimit(_msgSender()) == true (#833)
Apocalypse.onlyBuybacker() (#939-942) compares to a boolean constant:
-require(bool,string)(buyBacker[_msgSender()] == true,Not a buybacker) (#940)
Remove the equality to the boolean constant.

Additional information: link

Address.functionCall(address,bytes) (#104-106) is never used and should be removed
Address.functionCall(address,bytes,string) (#114-116) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#129-131) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#139-145) is never used and should be removed
Address.functionDelegateCall(address,bytes) (#176-178) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (#186-191) is never used and should be removed
Address.functionStaticCall(address,bytes) (#153-155) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (#163-168) is never used and should be removed
Address.isContract(address) (#52-61) is never used and should be removed
Address.sendValue(address,uint256) (#79-84) is never used and should be removed
Address.verifyCallResult(bool,bytes,string) (#199-214) is never used and should be removed
Context._msgData() (#458-463) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#399-404) is never used and should be removed
SafeMath.mod(uint256,uint256) (#363-365) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#421-426) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#234-240) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (#276-281) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#288-293) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#259-269) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#247-252) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.12 (#23) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
solc-0.8.12 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

Low level call in Address.sendValue(address,uint256) (#79-84):
- (success) = recipient.call{value: amount}() (#82)
Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (#139-145):
- (success,returndata) = target.call{value: value}(data) (#143)
Low level call in Address.functionStaticCall(address,bytes,string) (#163-168):
- (success,returndata) = target.staticcall(data) (#166)
Low level call in Address.functionDelegateCall(address,bytes,string) (#186-191):
- (success,returndata) = target.delegatecall(data) (#189)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IUniswapV2Router01.WETH() (#657) is not in mixedCase
Parameter RewardPoolDistributor.migratePool(address)._newPool (#805) is not in mixedCase
Parameter RewardPoolDistributor.distributeReward(address,uint256)._user (#824) is not in mixedCase
Parameter RewardPoolDistributor.distributeReward(address,uint256)._amount (#824) is not in mixedCase
Parameter RewardPoolDistributor.withdrawReward(uint256)._amount (#832) is not in mixedCase
Parameter RewardPoolDistributor.resetTimeLimit(address)._user (#845) is not in mixedCase
Parameter RewardPoolDistributor.needResetTimeLimit(address)._user (#857) is not in mixedCase
Variable RewardPoolDistributor._token (#739) is not in mixedCase
Variable RewardPoolDistributor._owner (#740) is not in mixedCase
Parameter Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256)._liquidityFee (#1185) is not in mixedCase
Parameter Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256)._buybackFee (#1186) is not in mixedCase
Parameter Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256)._rewardFee (#1187) is not in mixedCase
Parameter Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256)._marketingFee (#1188) is not in mixedCase
Parameter Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256)._feeDenominator (#1189) is not in mixedCase
Parameter Apocalypse.setFeeReceivers(address,address)._autoLiquidityReceiver (#1216) is not in mixedCase
Parameter Apocalypse.setFeeReceivers(address,address)._marketingFeeReceiver (#1216) is not in mixedCase
Parameter Apocalypse.setTargetLiquidity(uint256,uint256)._target (#1284) is not in mixedCase
Parameter Apocalypse.setTargetLiquidity(uint256,uint256)._denominator (#1284) is not in mixedCase
Parameter Apocalypse.setSwapBackSettings(bool,uint256)._enabled (#1291) is not in mixedCase
Parameter Apocalypse.setSwapBackSettings(bool,uint256)._amount (#1291) is not in mixedCase
Parameter Apocalypse.setAutoBuybackSettings(bool,uint256,uint256,uint256)._enabled (#1336) is not in mixedCase
Parameter Apocalypse.setAutoBuybackSettings(bool,uint256,uint256,uint256)._cap (#1336) is not in mixedCase
Parameter Apocalypse.setAutoBuybackSettings(bool,uint256,uint256,uint256)._amount (#1336) is not in mixedCase
Parameter Apocalypse.setAutoBuybackSettings(bool,uint256,uint256,uint256)._period (#1336) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in Apocalypse._transferFrom(address,address,uint256) (#1110-1130):
External calls:
- swapBack() (#1116)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
External calls sending eth:
- swapBack() (#1116)
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
- triggerAutoBuyback() (#1119)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#1382-1384)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#1122)
- _balances[recipient] = _balances[recipient].add(amountReceived) (#1126)
- amountReceived = takeFee(sender,recipient,amount) (#1124)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#1247)
- triggerAutoBuyback() (#1119)
- autoBuybackAccumulator = autoBuybackAccumulator.add(autoBuybackAmount) (#1363)
- triggerAutoBuyback() (#1119)
- autoBuybackBlockLast = block.number (#1362)
- triggerAutoBuyback() (#1119)
- autoBuybackEnabled = false (#1365)
- triggerAutoBuyback() (#1119)
- inSwap = true (#934)
- inSwap = false (#936)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount) (#1248)
- amountReceived = takeFee(sender,recipient,amount) (#1124)
- Transfer(sender,recipient,amountReceived) (#1128)
Reentrancy in Apocalypse.swapBack() (#1300-1332):
External calls:
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
External calls sending eth:
- distributor.deposit{value: amountBNBReward}() (#1320-1322)
- address(marketingFeeReceiver).transfer(amountBNBMarketing) (#1324)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#1327-1329)
Event emitted after the call(s):
- AutoLiquify(amountBNBLiquidity,amountToLiquify) (#1330)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#659) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#659)
Variable Apocalypse._totalSupply (#884) is too similar to Apocalypse.constructor(string,string,uint8,uint256,RewardPoolDistributor,address,address,uint256[5]).totalSupply_ (#950)
Prevent variables from having similar names.

Additional information: link

authorize(address) should be declared external:
- Auth.authorize(address) (#505-507)
unauthorize(address) should be declared external:
- Auth.unauthorize(address) (#512-514)
setFees(uint256,uint256,uint256,uint256,uint256) should be declared external:
- Apocalypse.setFees(uint256,uint256,uint256,uint256,uint256) (#1184-1192)
distributorInitialization(bool) should be declared external:
- Apocalypse.distributorInitialization(bool) (#1259-1261)
setRewardPoolDistributor(address) should be declared external:
- Apocalypse.setRewardPoolDistributor(address) (#1263-1267)
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 number of PancakeSwap swaps is less than 1. Token is either dead or inactive.

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

Token is deployed only at one blockchain

Token has only one trading pair

Contract has 7% buy tax and 7% sell tax.
Taxes are low and contract ownership is renounced.

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

Additional information: link

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 whitepaper link on the website

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

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

Token has relatively low CoinMarketCap rank