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PERA Token

About PERA

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Token 2 years
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CoinMarketCap 2 years
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Pera Finance is a multi-layered and sustainable trading & yield farming protocol integrated with a fully-decentralized daily trading competition.

Laser Scorebeta Last Audit: 21 April 2022

report
Token seems to be (relatively) fine. It still become a scam, but probability is moderate.

PERA.depositLPtoken(uint256) (#798-815) ignores return value by BEP20(lpTokenAddress).transferFrom(msg.sender,address(this),_amount) (#812)
PERA.emergencyWithdraw(uint256) (#848-857) ignores return value by BEP20(lpTokenAddress).transfer(msg.sender,user.userLPamount) (#851)
PERA.withdraw(uint256) (#860-879) ignores return value by BEP20(lpTokenAddress).transfer(msg.sender,_amount) (#873)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link


Contract ownership is not renounced (belongs to a wallet)

PERA.updateLPMultiplier(uint256) (#291-295) contains a tautology or contradiction:
- require(bool)(newLPMultiplier >= 0 && newLPMultiplier <= 200) (#293)
PERA.updateTCMultiplier(uint256) (#300-304) contains a tautology or contradiction:
- require(bool)(newTCMultiplier >= 0 && newTCMultiplier <= 100) (#302)
Fix the incorrect comparison by changing the value type or the comparison.

Additional information: link

PERA.addLPToken(address)._addr (#317) lacks a zero-check on :
- lpTokenAddress = _addr (#319)
Check that the address is not zero.

Additional information: link

PERA._transfer(address,address,uint256) (#355-429) performs a multiplication on the result of a division:
-tenthousandthofamonut = _value.div(10000) (#369)
-totalRewardforTC[_bnum] += uint256(tenthousandthofamonut.mul(tradingCompFee)) (#377)
PERA._transfer(address,address,uint256) (#355-429) performs a multiplication on the result of a division:
-tenthousandthofamonut = _value.div(10000) (#369)
-FeeRewPoolLP += uint256(tenthousandthofamonut.mul(liqproviderFee)) (#381)
PERA._transfer(address,address,uint256) (#355-429) performs a multiplication on the result of a division:
-tenthousandthofamonut = _value.div(10000) (#369)
-totalOut = uint256(tenthousandthofamonut.mul(tradingCompFee)) + uint256(tenthousandthofamonut.mul(holderFee)) + uint256(tenthousandthofamonut.mul(liqproviderFee)) (#385)
PERA._transfer(address,address,uint256) (#355-429) performs a multiplication on the result of a division:
-tenthousandthofamonut = _value.div(10000) (#369)
-includedRewards = tenthousandthofamonut.mul(holderFee) (#406)
PERA.calculateUserTCreward(address,uint256) (#655-689) performs a multiplication on the result of a division:
-rewardFee = rewardFee.mul(rewardRate).div(100) (#680)
-rewardFee = rewardFee.mul(51 + (7 * rDayDifference)).div(100) (#683)
PERA.calculateUserTCreward(address,uint256) (#655-689) performs a multiplication on the result of a division:
-rewardEmission = dailyRewardForTC.mul(TCRewardMultiplier).mul(rewardRate).div(1000) (#677)
-rewardEmission = rewardEmission.mul(51 + (7 * rDayDifference)).div(100) (#684)
PERA.calculateUserTCreward(address,uint256) (#655-689) performs a multiplication on the result of a division:
-rDayDifference = (block.number.sub(genesisBlock.add(_bnum.mul(BlockSizeForTC)))).div(BlockSizeForTC) (#661)
-traderRewardEligible = traderReward.mul(51 + (7 * rDayDifference)).div(100) (#685)
PERA.pendingTCreward(address,uint256) (#692-716) performs a multiplication on the result of a division:
-rewardFee = rewardFee.mul(rewardRate).div(100) (#708)
-rewardFee = rewardFee.mul(51 + (7 * rDayDifference)).div(100) (#710)
PERA.pendingTCreward(address,uint256) (#692-716) performs a multiplication on the result of a division:
-rewardEmission = dailyRewardForTC.mul(TCRewardMultiplier).mul(rewardRate).div(1000) (#705)
-rewardEmission = rewardEmission.mul(51 + (7 * rDayDifference)).div(100) (#711)
PERA.pendingTCreward(address,uint256) (#692-716) performs a multiplication on the result of a division:
-rDayDifference = (block.number.sub(genesisBlock.add(_Vbnum.mul(BlockSizeForTC)))).div(BlockSizeForTC) (#696)
-traderRewardEligible = traderReward.mul(51 + (7 * rDayDifference)).div(100) (#712)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in PERA.depositLPtoken(uint256) (#798-815):
External calls:
- BEP20(lpTokenAddress).transferFrom(msg.sender,address(this),_amount) (#812)
State variables written after the call(s):
- user.userReflectedLP = user.userLPamount.mul(LPRate).div(1e12) (#814)
Reentrancy in PERA.emergencyWithdraw(uint256) (#848-857):
External calls:
- BEP20(lpTokenAddress).transfer(msg.sender,user.userLPamount) (#851)
State variables written after the call(s):
- user.userLPamount = 0 (#852)
- user.userReflectedLP = 0 (#853)
Reentrancy in PERA.withdraw(uint256) (#860-879):
External calls:
- BEP20(lpTokenAddress).transfer(msg.sender,_amount) (#873)
State variables written after the call(s):
- FeeRewPoolLP = 0 (#876)
- user.userReflectedLP = user.userLPamount.mul(LPRate).div(1e12) (#878)
Apply the check-effects-interactions pattern.

Additional information: link

PERA.updateLastTrader(uint256,uint256,address).minIndex (#537) is a local variable never initialized
PERA.isTopTrader(uint256,address).checkTopTrader (#571) is a local variable never initialized
PERA.topTradersList(uint256,uint256,address).minIndex (#555) is a local variable never initialized
PERA.findTraderIndex(uint256,address).checkIndex (#582) 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

PERA.updateHolderFee(uint256) (#264-268) should emit an event for:
- holderFee = newHolderFee (#267)
PERA.updateLPStakerFee(uint256) (#273-277) should emit an event for:
- liqproviderFee = newLPStakerFee (#276)
PERA.updateTCFee(uint256) (#282-286) should emit an event for:
- tradingCompFee = newTCFee (#285)
PERA.updateLPMultiplier(uint256) (#291-295) should emit an event for:
- LPRewardMultiplier = newLPMultiplier (#294)
PERA.updateTCMultiplier(uint256) (#300-304) should emit an event for:
- TCRewardMultiplier = newTCMultiplier (#303)
PERA.updateminTCamount(uint256) (#309-313) should emit an event for:
- minTCamount = newminTCamount (#312)
PERA.depositLPtoken(uint256) (#798-815) should emit an event for:
- totalStakedLP += _amount (#810)
PERA.withdraw(uint256) (#860-879) should emit an event for:
- totalStakedLP -= _amount (#872)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in PERA.emergencyWithdraw(uint256) (#848-857):
External calls:
- BEP20(lpTokenAddress).transfer(msg.sender,user.userLPamount) (#851)
State variables written after the call(s):
- FeeRewPoolLP = 0 (#855)
Apply the check-effects-interactions pattern.

Additional information: link

PERA.includeAccount(address) (#220-231) has costly operations inside a loop:
- _excluded.pop() (#226)
Use a local variable to hold the loop computation result.

Additional information: link

PERA.PERASupply (#98) is set pre-construction with a non-constant function or state variable:
- 44950800 * 10 ** uint256(decimals)
PERA.transferRate (#103) is set pre-construction with a non-constant function or state variable:
- (transferRateInitial - (transferRateInitial % PERASupply)) / PERASupply
PERA.oneWeekasBlock (#107) is set pre-construction with a non-constant function or state variable:
- BlockSizeForTC * 7
PERA.tenYearsasBlock (#109) is set pre-construction with a non-constant function or state variable:
- oneWeekasBlock * 520
PERA.dailyRewardForTC (#112) is set pre-construction with a non-constant function or state variable:
- 9800 * 10 ** uint256(decimals)
PERA.minTCamount (#120) is set pre-construction with a non-constant function or state variable:
- 100 * 10 ** decimals
PERA.blockRewardLP (#127) is set pre-construction with a non-constant function or state variable:
- 175 * 10 ** uint256(decimals)
Remove any initialization of state variables via non-constant state variables or function calls. If variables must be set upon contract deployment, locate initialization in the constructor instead.

Additional information: link

Contract tokenRecipient (#2-4) is not in CapWords
Parameter BEP20.transfer(address,uint256)._to (#21) is not in mixedCase
Parameter BEP20.transfer(address,uint256)._value (#21) is not in mixedCase
Parameter BEP20.transferFrom(address,address,uint256)._from (#26) is not in mixedCase
Parameter BEP20.transferFrom(address,address,uint256)._to (#26) is not in mixedCase
Parameter BEP20.transferFrom(address,address,uint256)._value (#26) is not in mixedCase
Parameter BEP20.approve(address,uint256)._spender (#33) is not in mixedCase
Parameter BEP20.approve(address,uint256)._value (#33) is not in mixedCase
Parameter BEP20.approveAndCall(address,uint256,bytes)._spender (#40) is not in mixedCase
Parameter BEP20.approveAndCall(address,uint256,bytes)._value (#40) is not in mixedCase
Parameter BEP20.approveAndCall(address,uint256,bytes)._extraData (#40) is not in mixedCase
Struct PERA.topTraders (#438-441) is not in CapWords
Struct PERA.findTopLast (#446-449) is not in CapWords
Parameter PERA.transfer(address,uint256)._to (#173) is not in mixedCase
Parameter PERA.transfer(address,uint256)._value (#173) is not in mixedCase
Parameter PERA.transferFrom(address,address,uint256)._from (#178) is not in mixedCase
Parameter PERA.transferFrom(address,address,uint256)._to (#178) is not in mixedCase
Parameter PERA.transferFrom(address,address,uint256)._value (#178) is not in mixedCase
Parameter PERA.approve(address,uint256)._spender (#185) is not in mixedCase
Parameter PERA.approve(address,uint256)._value (#185) is not in mixedCase
Parameter PERA.approveAndCall(address,uint256,bytes)._spender (#192) is not in mixedCase
Parameter PERA.approveAndCall(address,uint256,bytes)._value (#192) is not in mixedCase
Parameter PERA.approveAndCall(address,uint256,bytes)._extraData (#192) is not in mixedCase
Function PERA._isExcluded(address) (#234-241) is not in mixedCase
Parameter PERA._isExcluded(address)._addr (#234) is not in mixedCase
Function PERA._removeExcludedAmounts() (#244-250) is not in mixedCase
Parameter PERA.excludeFromTax(address,uint256)._account (#252) is not in mixedCase
Parameter PERA.excludeFromTax(address,uint256)._checkTax (#252) is not in mixedCase
Parameter PERA.addLPToken(address)._addr (#317) is not in mixedCase
Parameter PERA.balanceOf(address)._addr (#325) is not in mixedCase
Parameter PERA.isManager(address)._addr (#347) is not in mixedCase
Parameter PERA.tradingComp(uint256,address,uint256)._value (#454) is not in mixedCase
Parameter PERA.tradingComp(uint256,address,uint256)._addr (#454) is not in mixedCase
Parameter PERA.tradingComp(uint256,address,uint256)._bnum (#454) is not in mixedCase
Parameter PERA.updateLastTrader(uint256,uint256,address)._value (#524) is not in mixedCase
Parameter PERA.updateLastTrader(uint256,uint256,address)._bnum (#524) is not in mixedCase
Parameter PERA.updateLastTrader(uint256,uint256,address)._addr (#524) is not in mixedCase
Parameter PERA.topTradersList(uint256,uint256,address)._value (#552) is not in mixedCase
Parameter PERA.topTradersList(uint256,uint256,address)._bnum (#552) is not in mixedCase
Parameter PERA.topTradersList(uint256,uint256,address)._addr (#552) is not in mixedCase
Parameter PERA.isTopTrader(uint256,address)._bnum (#570) is not in mixedCase
Parameter PERA.isTopTrader(uint256,address)._addr (#570) is not in mixedCase
Parameter PERA.findTraderIndex(uint256,address)._bnum (#581) is not in mixedCase
Parameter PERA.findTraderIndex(uint256,address)._addr (#581) is not in mixedCase
Parameter PERA.checkTopTraderList(uint256,uint256)._bnum (#592) is not in mixedCase
Parameter PERA.checkTopTraderList(uint256,uint256)._Ranking (#592) is not in mixedCase
Parameter PERA.sortTraders(uint256)._bnum (#599) is not in mixedCase
Parameter PERA.isUserWinner(address[],address)._addr (#623) is not in mixedCase
Parameter PERA.checkUserVolume(address,uint256)._addr (#633) is not in mixedCase
Parameter PERA.checkUserPayment(address,uint256)._addr (#639) is not in mixedCase
Parameter PERA.checkUserTCPosition(address[],address)._addr (#645) is not in mixedCase
Parameter PERA.calculateUserTCreward(address,uint256)._addr (#655) is not in mixedCase
Parameter PERA.calculateUserTCreward(address,uint256)._bnum (#655) is not in mixedCase
Parameter PERA.pendingTCreward(address,uint256)._addr (#692) is not in mixedCase
Parameter PERA.pendingTCreward(address,uint256)._bnum (#692) is not in mixedCase
Parameter PERA.getTCreward(uint256)._bnum (#719) is not in mixedCase
Parameter PERA.nMixAddrandSpBlock(address,uint256)._addr (#739) is not in mixedCase
Parameter PERA.nAddrHash(address)._address (#759) is not in mixedCase
Parameter PERA.getDistReward(uint256,uint256)._from (#768) is not in mixedCase
Parameter PERA.getDistReward(uint256,uint256)._to (#768) is not in mixedCase
Parameter PERA.pendingPERA(address)._user (#780) is not in mixedCase
Parameter PERA.depositLPtoken(uint256)._amount (#798) is not in mixedCase
Parameter PERA.updateRate(uint256)._totalStakedLP (#818) is not in mixedCase
Parameter PERA.withdraw(uint256)._amount (#860) is not in mixedCase
Variable PERA.LPTokenDecimals (#96) is not in mixedCase
Variable PERA.PERASupply (#98) is not in mixedCase
Constant PERA.transferRateInitial (#102) is not in UPPER_CASE_WITH_UNDERSCORES
Variable PERA.BlockSizeForTC (#105) is not in mixedCase
Variable PERA.TCRewardMultiplier (#115) is not in mixedCase
Variable PERA.LPRewardMultiplier (#130) is not in mixedCase
Variable PERA.LPRate (#132) is not in mixedCase
Variable PERA.FeeRewPoolLP (#134) is not in mixedCase
Variable PERA._excluded (#149) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable PERA.updateRate(uint256)._totalStakedLP (#818) is too similar to PERA.pendingPERA(address).vtotalStakedLP (#784)
Prevent variables from having similar names.

Additional information: link

PERA.nAddrHash(address) (#759-761) uses literals with too many digits:
- uint256(_address) % 10000000000 (#760)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

PERA.LPTokenDecimals (#96) is never used in PERA (#91-881)
PERA.userLPamount (#138) is never used in PERA (#91-881)
Remove unused state variables.

Additional information: link

PERA.BlockSizeForTC (#105) should be constant
PERA.LPTokenDecimals (#96) should be constant
PERA.decimals (#95) should be constant
PERA.totalTCwinners (#117) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

transfer(address,uint256) should be declared external:
- BEP20.transfer(address,uint256) (#21-24)
transferFrom(address,address,uint256) should be declared external:
- BEP20.transferFrom(address,address,uint256) (#26-31)
approveAndCall(address,uint256,bytes) should be declared external:
- BEP20.approveAndCall(address,uint256,bytes) (#40-48)
transfer(address,uint256) should be declared external:
- PERA.transfer(address,uint256) (#173-176)
transferFrom(address,address,uint256) should be declared external:
- PERA.transferFrom(address,address,uint256) (#178-183)
approveAndCall(address,uint256,bytes) should be declared external:
- PERA.approveAndCall(address,uint256,bytes) (#192-200)
balanceOf(address) should be declared external:
- PERA.balanceOf(address) (#325-331)
transferOwnership(address) should be declared external:
- PERA.transferOwnership(address) (#337-344)
checkTopTraderList(uint256,uint256) should be declared external:
- PERA.checkTopTraderList(uint256,uint256) (#592-594)
checkUserPayment(address,uint256) should be declared external:
- PERA.checkUserPayment(address,uint256) (#639-641)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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

Contract has 2% buy tax and 2% sell tax.
Taxes are low but contract ownership is not renounced. Token has a high risk of becoming a honeypot.


Average 30d PancakeSwap liquidity is low.


Unable to find Youtube account


Unable to find audit link on the website


Unable to find Telegram link on the website


Unable to find Twitter link on the website


Unable to find token on CoinHunt

Additional information: link


Young tokens have high risks of price dump / death

Price for PERA

News for PERA