EPR [Eprotocol] Token

EPR.swapBack() (#575-639) sends eth to arbitrary user
Dangerous calls:
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in EPR._transferFrom(address,address,uint256) (#523-558):
External calls:
- rebase() (#536)
- pairContract.sync() (#465)
- swapBack() (#540)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#597-603)
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
External calls sending eth:
- swapBack() (#540)
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
State variables written after the call(s):
- _gonBalances[sender] = _gonBalances[sender].sub(gonAmount) (#543)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonAmountReceived) (#548-550)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#545-547)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(feeAmount) (#650-652)
Apply the check-effects-interactions pattern.

Additional information: link

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

EPR.swapBack().success (#618) is written in both
(success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
(success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
EPR.swapBack().success (#618) is written in both
(success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
success = false (#627)
Fix or remove the writes.

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.

EPR.swapBack() (#575-639) ignores return value by router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
Ensure that all the return values of the function calls are used.

Additional information: link

EPR.rebase() (#447-468) performs a multiplication on the result of a division:
-times = deltaTime.div(rebaseFrequency) (#451)
-epoch = times.mul(rebaseFrequency) (#452)
EPR.swapBack() (#575-639) performs a multiplication on the result of a division:
-contractTokenBalance = _gonBalances[address(this)].div(_gonsPerFragment) (#582-584)
-amountToLiquify = contractTokenBalance.mul(dynamicLiquidityFee).div(totalFee).div(2) (#585-588)
EPR.setSwapBackSettings(bool,uint256,uint256) (#739-746) performs a multiplication on the result of a division:
-gonSwapThreshold = TOTAL_GONS.div(_denom).mul(_num) (#745)
EPR.getLiquidityBacking(uint256) (#852-860) performs a multiplication on the result of a division:
-liquidityBalance = _gonBalances[pair].div(_gonsPerFragment) (#857)
-accuracy.mul(liquidityBalance.mul(2)).div(getCirculatingSupply()) (#858-859)
Consider ordering multiplication before division.

Additional information: link

EPR.mint(address,uint256) (#726-737) should emit an event for:
- _totalSupply = _totalSupply.add(uint256(amount)) (#727)
- _totalSupply = MAX_SUPPLY (#730)
- _gonsPerFragment = TOTAL_GONS.div(_totalSupply) (#733)
EPR.setSwapBackSettings(bool,uint256,uint256) (#739-746) should emit an event for:
- gonSwapThreshold = TOTAL_GONS.div(_denom).mul(_num) (#745)
EPR.setTargetLiquidity(uint256,uint256) (#771-774) should emit an event for:
- targetLiquidity = target (#772)
- targetLiquidityDenominator = accuracy (#773)
EPR.setFees(uint256,uint256,uint256,uint256,uint256) (#815-829) should emit an event for:
- liquidityFee = _liquidityFee (#822)
- RiskFreeValue = _RiskFreeValue (#823)
- Treasury = _Treasury (#824)
- sellFee = _sellFee (#825)
- totalFee = liquidityFee.add(Treasury).add(RiskFreeValue) (#826)
- feeDenominator = _feeDenominator (#827)
Emit an event for critical parameter changes.

Additional information: link

EPR.setFeeReceivers(address,address,address)._autoLiquidityReceiver (#806) lacks a zero-check on :
- autoLiquidityReceiver = _autoLiquidityReceiver (#810)
EPR.setFeeReceivers(address,address,address)._TreasuryReceiver (#807) lacks a zero-check on :
- TreasuryReceiver = _TreasuryReceiver (#811)
EPR.setFeeReceivers(address,address,address)._RiskFreeValueReceiver (#808) lacks a zero-check on :
- RiskFreeValueReceiver = _RiskFreeValueReceiver (#812)
EPR.clearStuckBalance(uint256,address).adr (#831) lacks a zero-check on :
- address(adr).transfer((amountETH * amountPercentage) / 100) (#833-835)
Check that the address is not zero.

Additional information: link

EPR.rebase() (#447-468) has external calls inside a loop: pairContract.sync() (#465)
EPR.swapBack() (#575-639) has external calls inside a loop: path[1] = router.WETH() (#593)
EPR.swapBack() (#575-639) has external calls inside a loop: router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#597-603)
EPR.swapBack() (#575-639) has external calls inside a loop: (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
EPR.swapBack() (#575-639) has external calls inside a loop: (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
EPR.swapBack() (#575-639) has external calls inside a loop: router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
Favor pull over push strategy for external calls.

Additional information: link

Reentrancy in EPR.constructor(address,address,address) (#416-441):
External calls:
- pair = IDEXFactory(router.factory()).createPair(router.WETH(),address(this)) (#419-422)
State variables written after the call(s):
- RiskFreeValueReceiver = 0xA9c654FD22182e2E0721C9D9A47999d7F96c5db1 (#426)
- TreasuryReceiver = 0x4f4556344437b28C2314620934B7d50De7FCC719 (#425)
- _allowedFragments[address(this)][address(router)] = uint256(- 1) (#428)
- _gonBalances[TreasuryReceiver] = TOTAL_GONS (#432)
- _gonsPerFragment = TOTAL_GONS.div(_totalSupply) (#433)
- _isFeeExempt[TreasuryReceiver] = true (#436)
- _isFeeExempt[address(this)] = true (#437)
- _transferOwnership(TreasuryReceiver) (#439)
- _owner = newOwner (#331)
- _totalSupply = INITIAL_FRAGMENTS_SUPPLY (#431)
- autoLiquidityReceiver = 0x258DEA878616639B8239CBFBE97405F5954e2F4e (#424)
- initialDistributionFinished = false (#435)
- pairContract = InterfaceLP(pair) (#429)
Reentrancy in EPR.mint(address,uint256) (#726-737):
External calls:
- pairContract.sync() (#734)
State variables written after the call(s):
- _gonBalances[recipient] = _gonBalances[recipient].add(amount) (#736)
Apply the check-effects-interactions pattern.

Additional information: link

renounceMinter() should be declared external:
- MinterRole.renounceMinter() (#181-183)
name() should be declared external:
- ERC20Detailed.name() (#211-213)
symbol() should be declared external:
- ERC20Detailed.symbol() (#215-217)
decimals() should be declared external:
- ERC20Detailed.decimals() (#219-221)
owner() should be declared external:
- Ownable.owner() (#306-308)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#319-322)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#324-326)
updateBlacklist(address,bool) should be declared external:
- EPR.updateBlacklist(address,bool) (#443-445)
addMinter(address) should be declared external:
- EPR.addMinter(address) (#776-778)
removeMinter(address) should be declared external:
- EPR.removeMinter(address) (#780-782)
rescueToken(address,uint256) should be declared external:
- EPR.rescueToken(address,uint256) (#838-844)
Use the external attribute for functions never called from the contract.

Additional information: link

Reentrancy in EPR._transferFrom(address,address,uint256) (#523-558):
External calls:
- rebase() (#536)
- pairContract.sync() (#465)
- swapBack() (#540)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#597-603)
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
External calls sending eth:
- swapBack() (#540)
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#630-637)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount.div(_gonsPerFragment)) (#653)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#545-547)
- Transfer(sender,recipient,gonAmountReceived.div(_gonsPerFragment)) (#552-556)
Reentrancy in EPR.constructor(address,address,address) (#416-441):
External calls:
- pair = IDEXFactory(router.factory()).createPair(router.WETH(),address(this)) (#419-422)
Event emitted after the call(s):
- OwnershipTransferred(_owner,newOwner) (#330)
- _transferOwnership(TreasuryReceiver) (#439)
- Transfer(address(0x0),TreasuryReceiver,_totalSupply) (#440)
Reentrancy in EPR.rebase() (#447-468):
External calls:
- pairContract.sync() (#465)
Event emitted after the call(s):
- LogRebase(epoch,_totalSupply) (#467)
Apply the check-effects-interactions pattern.

Additional information: link

EPR.rebase() (#447-468) uses timestamp for comparisons
Dangerous comparisons:
- i < times (#454)
EPR.shouldRebase() (#756-762) uses timestamp for comparisons
Dangerous comparisons:
- autoRebase && msg.sender != pair && ! inSwap && block.timestamp >= (lastRebasedTime + rebaseFrequency) (#757-761)
Avoid relying on block.timestamp.

Additional information: link

EPR.rebase() (#447-468) has costly operations inside a loop:
- _totalSupply = _totalSupply.mul((10 ** rateDecimals).add(rebaseRate)).div(10 ** rateDecimals) (#455)
EPR.rebase() (#447-468) has costly operations inside a loop:
- _totalSupply = MAX_SUPPLY (#459)
EPR.rebase() (#447-468) has costly operations inside a loop:
- _gonsPerFragment = TOTAL_GONS.div(_totalSupply) (#462)
EPR.rebase() (#447-468) has costly operations inside a loop:
- lastRebasedTime = lastRebasedTime.add(epoch) (#463)
EPR.swapping() (#398-402) has costly operations inside a loop:
- inSwap = true (#399)
EPR.swapping() (#398-402) has costly operations inside a loop:
- inSwap = false (#401)
Use a local variable to hold the loop computation result.

Additional information: link

EPR.transferToAddressETH(address,uint256) (#846-850) is never used and should be removed
SafeMath.mod(uint256,uint256) (#119-122) is never used and should be removed
SafeMathInt.abs(int256) (#35-38) is never used and should be removed
SafeMathInt.add(int256,int256) (#29-33) is never used and should be removed
SafeMathInt.div(int256,int256) (#17-21) is never used and should be removed
SafeMathInt.mul(int256,int256) (#9-15) is never used and should be removed
SafeMathInt.sub(int256,int256) (#23-27) is never used and should be removed
Remove unused functions.

Additional information: link

EPR.totalFee (#371-372) is set pre-construction with a non-constant function or state variable:
- liquidityFee.add(Treasury).add(RiskFreeValue)
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

Pragma version^0.7.4 (#3) allows old versions
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 EPR.swapBack() (#575-639):
- (success) = address(TreasuryReceiver).call{gas: 30000,value: amountETHTreasury}() (#618-621)
- (success,None) = address(RiskFreeValueReceiver).call{gas: 30000,value: amountETHRiskFreeValue}() (#622-625)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IDEXRouter.WETH() (#227) is not in mixedCase
Parameter EPR.updateBlacklist(address,bool)._user (#443) is not in mixedCase
Parameter EPR.updateBlacklist(address,bool)._flag (#443) is not in mixedCase
Parameter EPR.setLP(address)._address (#494) is not in mixedCase
Parameter EPR.checkFeeExempt(address)._addr (#706) is not in mixedCase
Parameter EPR.enableTransfer(address)._addr (#714) is not in mixedCase
Parameter EPR.setFeeExempt(address)._addr (#718) is not in mixedCase
Parameter EPR.setSwapBackSettings(bool,uint256,uint256)._enabled (#740) is not in mixedCase
Parameter EPR.setSwapBackSettings(bool,uint256,uint256)._num (#741) is not in mixedCase
Parameter EPR.setSwapBackSettings(bool,uint256,uint256)._denom (#742) is not in mixedCase
Parameter EPR.setFeeReceivers(address,address,address)._autoLiquidityReceiver (#806) is not in mixedCase
Parameter EPR.setFeeReceivers(address,address,address)._TreasuryReceiver (#807) is not in mixedCase
Parameter EPR.setFeeReceivers(address,address,address)._RiskFreeValueReceiver (#808) is not in mixedCase
Parameter EPR.setFees(uint256,uint256,uint256,uint256,uint256)._liquidityFee (#816) is not in mixedCase
Parameter EPR.setFees(uint256,uint256,uint256,uint256,uint256)._RiskFreeValue (#817) is not in mixedCase
Parameter EPR.setFees(uint256,uint256,uint256,uint256,uint256)._Treasury (#818) is not in mixedCase
Parameter EPR.setFees(uint256,uint256,uint256,uint256,uint256)._sellFee (#819) is not in mixedCase
Parameter EPR.setFees(uint256,uint256,uint256,uint256,uint256)._feeDenominator (#820) is not in mixedCase
Variable EPR._isFeeExempt (#346) is not in mixedCase
Variable EPR.Treasury (#368) is not in mixedCase
Variable EPR.RiskFreeValue (#369) is not in mixedCase
Variable EPR.DEAD (#375) is not in mixedCase
Variable EPR.ZERO (#376) is not in mixedCase
Variable EPR.TreasuryReceiver (#379) is not in mixedCase
Variable EPR.RiskFreeValueReceiver (#380) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#232) is too similar to IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#233)
Prevent variables from having similar names.

Additional information: link

EPR.slitherConstructorVariables() (#335-872) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#375)
EPR.slitherConstructorVariables() (#335-872) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#376)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

SafeMathInt.MAX_INT256 (#7) is never used in SafeMathInt (#5-39)
Remove unused state variables.

Additional information: link

EPR.DEAD (#375) should be constant
EPR.ZERO (#376) should be constant
EPR.rateDecimals (#387) should be constant
EPR.rebaseFrequency (#388) should be constant
EPR.rebaseRate (#386) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

Average 30d PancakeSwap volume is low.

Average 30d number of PancakeSwap swaps is low.

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 13% buy tax and 18% sell tax.
Taxes are high (over 10%) but contract ownership is renounced.

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.

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Unable to find token on CoinGecko

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Unable to find token on CoinMarketCap

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Unable to verify that token and website are owned by the same team (no listings + unable to find contract on website)

Unable to find whitepaper link on the website

Token is not listed at Mobula.Finance

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Unable to find token on CoinHunt

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Unable to verify token contract address on the website

Unable to find Telegram link on the website

Unable to find Twitter link on the website

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

Token has no active CoinMarketCap listing / rank

Young tokens have high risks of price dump / death