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Spark [SparkLab] Token

About Spark

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Token 13 months
CoinMarketCap 12 months
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SparkLab helps traders to spot opportunities across the #BSC while always keeping an eye on their investments.

Laser Scorebeta Last Audit: 17 January 2022

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

SparkLab._swapContractToken(bool) (SparkLab.sol#266-305) sends eth to arbitrary user
Dangerous calls:
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in SparkLab._taxedTransfer(address,address,uint256) (SparkLab.sol#157-196):
External calls:
- _swapContractToken(false) (SparkLab.sol#179)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
External calls sending eth:
- _swapContractToken(false) (SparkLab.sol#179)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
State variables written after the call(s):
- _balances[sender] -= amount (SparkLab.sol#188)
- _balances[address(this)] += contractToken (SparkLab.sol#190)
- _balances[recipient] += taxedAmount (SparkLab.sol#193)
- _circulatingSupply -= tokensToBeBurnt (SparkLab.sol#192)
Apply the check-effects-interactions pattern.

Additional information: link

SparkLab.LiquidityRelease() (SparkLab.sol#403-417) ignores return value by liquidityToken.transfer(msg.sender,amount) (SparkLab.sol#415)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link


Too many vulnerabilities (Unchecked transfer, Reentrancy vulnerability, etc.). High risk of a scam. DYOR & manual audit are advised.

SparkLab._swapContractToken(bool).sent (SparkLab.sol#303) is written in both
(sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
sent = true (SparkLab.sol#304)
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.


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.

SparkLab._addLiquidity(uint256,uint256) (SparkLab.sol#323-333) ignores return value by _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
Ensure that all the return values of the function calls are used.

Additional information: link

SparkLab._swapContractToken(bool) (SparkLab.sol#266-305) performs a multiplication on the result of a division:
-tokenToSwap = _balances[_pancakePairAddress] * swapTreshold / 1000 (SparkLab.sol#270)
-tokenForLiquidity = (tokenToSwap * liquidityTax) / totalTax (SparkLab.sol#283-285)
SparkLab._swapContractToken(bool) (SparkLab.sol#266-305) performs a multiplication on the result of a division:
-LiqHalf = tokenForLiquidity / 2 (SparkLab.sol#289)
-liqBNB = (newBNB * LiqHalf) / swapToken (SparkLab.sol#299)
Consider ordering multiplication before division.

Additional information: link

SparkLab.allowance(address,address)._owner (SparkLab.sol#454) shadows:
- Ownable._owner (Libraries.sol#47) (state variable)
SparkLab._approve(address,address,uint256).owner (SparkLab.sol#462) shadows:
- Ownable.owner() (Libraries.sol#63-65) (function)
Rename the local variables that shadow another component.

Additional information: link

SparkLab.setSwapTreshold(uint256) (SparkLab.sol#231-234) should emit an event for:
- swapTreshold = newSwapTresholdPermille (SparkLab.sol#233)
SparkLab.SetOverLiquifiedTreshold(uint256) (SparkLab.sol#237-240) should emit an event for:
- overLiquifyTreshold = newOverLiquifyTresholdPermille (SparkLab.sol#239)
Emit an event for critical parameter changes.

Additional information: link

SparkLab.ChangeMarketingWallet(address).newWallet (SparkLab.sol#97) lacks a zero-check on :
- marketingWallet = newWallet (SparkLab.sol#99)
Check that the address is not zero.

Additional information: link

Reentrancy in SparkLab._swapContractToken(bool) (SparkLab.sol#266-305):
External calls:
- _swapTokenForBNB(swapToken) (SparkLab.sol#294)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
External calls sending eth:
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
State variables written after the call(s):
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
- _allowances[owner][spender] = amount (SparkLab.sol#466)
Reentrancy in SparkLab.constructor() (SparkLab.sol#114-131):
External calls:
- _pancakePairAddress = IPancakeFactory(_pancakeRouter.factory()).createPair(address(this),_pancakeRouter.WETH()) (SparkLab.sol#122)
State variables written after the call(s):
- excludedFromFees[msg.sender] = true (SparkLab.sol#128)
- excludedFromFees[PancakeRouter] = true (SparkLab.sol#129)
- excludedFromFees[address(this)] = true (SparkLab.sol#130)
- isAMM[_pancakePairAddress] = true (SparkLab.sol#123)
- marketingWallet = msg.sender (SparkLab.sol#126)
Reentrancy in SparkLab.transferFrom(address,address,uint256) (SparkLab.sol#470-478):
External calls:
- _transfer(sender,recipient,amount) (SparkLab.sol#471)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
External calls sending eth:
- _transfer(sender,recipient,amount) (SparkLab.sol#471)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
State variables written after the call(s):
- _approve(sender,msg.sender,currentAllowance - amount) (SparkLab.sol#476)
- _allowances[owner][spender] = amount (SparkLab.sol#466)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in SparkLab.LiquidityRelease() (SparkLab.sol#403-417):
External calls:
- liquidityToken.transfer(msg.sender,amount) (SparkLab.sol#415)
Event emitted after the call(s):
- OnReleaseLP() (SparkLab.sol#416)
Reentrancy in SparkLab._swapContractToken(bool) (SparkLab.sol#266-305):
External calls:
- _swapTokenForBNB(swapToken) (SparkLab.sol#294)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
External calls sending eth:
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
Event emitted after the call(s):
- Approval(owner,spender,amount) (SparkLab.sol#467)
- _addLiquidity(LiqHalf,liqBNB) (SparkLab.sol#300)
Reentrancy in SparkLab._taxedTransfer(address,address,uint256) (SparkLab.sol#157-196):
External calls:
- _swapContractToken(false) (SparkLab.sol#179)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
External calls sending eth:
- _swapContractToken(false) (SparkLab.sol#179)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
Event emitted after the call(s):
- Transfer(sender,recipient,taxedAmount) (SparkLab.sol#195)
Reentrancy in SparkLab.transferFrom(address,address,uint256) (SparkLab.sol#470-478):
External calls:
- _transfer(sender,recipient,amount) (SparkLab.sol#471)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- _pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount,0,path,address(this),block.timestamp) (SparkLab.sol#313-320)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
External calls sending eth:
- _transfer(sender,recipient,amount) (SparkLab.sol#471)
- _pancakeRouter.addLiquidityETH{value: bnbamount}(address(this),tokenamount,0,0,address(this),block.timestamp) (SparkLab.sol#325-332)
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
Event emitted after the call(s):
- Approval(owner,spender,amount) (SparkLab.sol#467)
- _approve(sender,msg.sender,currentAllowance - amount) (SparkLab.sol#476)
Apply the check-effects-interactions pattern.

Additional information: link

SparkLab._transfer(address,address,uint256) (SparkLab.sol#142-155) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(LaunchTimestamp > 0,trading not yet enabled) (SparkLab.sol#152)
SparkLab._taxedTransfer(address,address,uint256) (SparkLab.sol#157-196) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(senderBalance >= amount,Transfer exceeds balance) (SparkLab.sol#159)
- block.timestamp < LaunchTimestamp + SellTaxDuration (SparkLab.sol#167)
- block.timestamp < LaunchTimestamp + BuyTaxDuration (SparkLab.sol#173)
SparkLab._feelessTransfer(address,address,uint256) (SparkLab.sol#209-215) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(senderBalance >= amount,Transfer exceeds balance) (SparkLab.sol#211)
SparkLab.isOverLiquified() (SparkLab.sol#259-261) uses timestamp for comparisons
Dangerous comparisons:
- _balances[_pancakePairAddress] > _circulatingSupply * overLiquifyTreshold / 1000 (SparkLab.sol#260)
SparkLab.getLiquidityReleaseTimeInSeconds() (SparkLab.sol#338-342) uses timestamp for comparisons
Dangerous comparisons:
- block.timestamp < _liquidityUnlockTime (SparkLab.sol#339)
SparkLab.SetupEnableTrading() (SparkLab.sol#374-378) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(LaunchTimestamp == 0,AlreadyLaunched) (SparkLab.sol#375)
SparkLab._prolongLiquidityLock(uint256) (SparkLab.sol#395-400) uses timestamp for comparisons
Dangerous comparisons:
- require(bool)(newUnlockTime > _liquidityUnlockTime) (SparkLab.sol#397)
SparkLab.LiquidityRelease() (SparkLab.sol#403-417) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp >= _liquidityUnlockTime,Not yet unlocked) (SparkLab.sol#405)
Avoid relying on block.timestamp.

Additional information: link

Low level call in SparkLab._swapContractToken(bool) (SparkLab.sol#266-305):
- (sent) = marketingWallet.call{value: address(this).balance}() (SparkLab.sol#303)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IPancakeRouter.WETH() (Libraries.sol#42) is not in mixedCase
Function SparkLab.ChangeMarketingWallet(address) (SparkLab.sol#97-100) is not in mixedCase
Function SparkLab.SetOverLiquifiedTreshold(uint256) (SparkLab.sol#237-240) is not in mixedCase
Function SparkLab.SetTaxes(uint256,uint256,uint256,uint256,uint256,uint256) (SparkLab.sol#244-256) is not in mixedCase
Function SparkLab.SetAMM(address,bool) (SparkLab.sol#350-353) is not in mixedCase
Parameter SparkLab.SetAMM(address,bool).AMM (SparkLab.sol#350) is not in mixedCase
Parameter SparkLab.SetAMM(address,bool).Add (SparkLab.sol#350) is not in mixedCase
Function SparkLab.SwitchManualSwap(bool) (SparkLab.sol#357-359) is not in mixedCase
Function SparkLab.SwapContractToken() (SparkLab.sol#361-363) is not in mixedCase
Function SparkLab.ExcludeAccountFromFees(address,bool) (SparkLab.sol#366-370) is not in mixedCase
Function SparkLab.SetupEnableTrading() (SparkLab.sol#374-378) is not in mixedCase
Function SparkLab.LockLiquidityForSeconds(uint256) (SparkLab.sol#391-393) is not in mixedCase
Function SparkLab.LiquidityRelease() (SparkLab.sol#403-417) is not in mixedCase
Parameter SparkLab.allowance(address,address)._owner (SparkLab.sol#454) is not in mixedCase
Constant SparkLab._name (SparkLab.sol#63) is not in UPPER_CASE_WITH_UNDERSCORES
Constant SparkLab._symbol (SparkLab.sol#64) is not in UPPER_CASE_WITH_UNDERSCORES
Constant SparkLab._decimals (SparkLab.sol#65) is not in UPPER_CASE_WITH_UNDERSCORES
Constant SparkLab.InitialSupply (SparkLab.sol#66) is not in UPPER_CASE_WITH_UNDERSCORES
Constant SparkLab.DefaultLiquidityLockTime (SparkLab.sol#68) is not in UPPER_CASE_WITH_UNDERSCORES
Constant SparkLab.PancakeRouter (SparkLab.sol#73) is not in UPPER_CASE_WITH_UNDERSCORES
Variable SparkLab.LaunchTimestamp (SparkLab.sol#373) is not in mixedCase
Variable SparkLab._liquidityUnlockTime (SparkLab.sol#383) is not in mixedCase
Variable SparkLab.LPReleaseLimitedTo20Percent (SparkLab.sol#384) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (Libraries.sol#82-85)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (Libraries.sol#91-95)
ChangeMarketingWallet(address) should be declared external:
- SparkLab.ChangeMarketingWallet(address) (SparkLab.sol#97-100)
setSwapTreshold(uint256) should be declared external:
- SparkLab.setSwapTreshold(uint256) (SparkLab.sol#231-234)
SetOverLiquifiedTreshold(uint256) should be declared external:
- SparkLab.SetOverLiquifiedTreshold(uint256) (SparkLab.sol#237-240)
SetTaxes(uint256,uint256,uint256,uint256,uint256,uint256) should be declared external:
- SparkLab.SetTaxes(uint256,uint256,uint256,uint256,uint256,uint256) (SparkLab.sol#244-256)
getLiquidityReleaseTimeInSeconds() should be declared external:
- SparkLab.getLiquidityReleaseTimeInSeconds() (SparkLab.sol#338-342)
getBurnedTokens() should be declared external:
- SparkLab.getBurnedTokens() (SparkLab.sol#343-345)
SetAMM(address,bool) should be declared external:
- SparkLab.SetAMM(address,bool) (SparkLab.sol#350-353)
SwitchManualSwap(bool) should be declared external:
- SparkLab.SwitchManualSwap(bool) (SparkLab.sol#357-359)
SwapContractToken() should be declared external:
- SparkLab.SwapContractToken() (SparkLab.sol#361-363)
ExcludeAccountFromFees(address,bool) should be declared external:
- SparkLab.ExcludeAccountFromFees(address,bool) (SparkLab.sol#366-370)
SetupEnableTrading() should be declared external:
- SparkLab.SetupEnableTrading() (SparkLab.sol#374-378)
limitLiquidityReleaseTo20Percent() should be declared external:
- SparkLab.limitLiquidityReleaseTo20Percent() (SparkLab.sol#387-389)
LockLiquidityForSeconds(uint256) should be declared external:
- SparkLab.LockLiquidityForSeconds(uint256) (SparkLab.sol#391-393)
LiquidityRelease() should be declared external:
- SparkLab.LiquidityRelease() (SparkLab.sol#403-417)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Token is deployed only at one blockchain


Unable to find PancakeSwap trading pair to compute liquidity.


Unable to find PancakeSwap trading pair to compute number of swaps.


Last post in Twitter was more than 30 days ago


Unable to find Youtube account

No disclosed threats


Young tokens have high risks of price dump / death


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


Young tokens have high risks of price dump / death


Young tokens have high risks of price dump / death


Young tokens have high risks of price dump / death


Token has relatively low CoinGecko rank


Token has relatively low CoinMarketCap rank

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