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JOKER [JokerCoin] Token

About JOKER

Listings

Token 12 months
CoinMarketCap 11 months

Joker is a coin created by a development team of 16 people who are behind the creation of an e-game peer-to-peer card game called JokerBank. Joker is based on a community of people, but unlike regular fun coins, the Joker has a clear purpose and vision.

The goal of Joker is to create a strong community while working to expand its own Joker platform with the JokerBank pilot project already in operation. Joker will bring fresh air to the online entertainment segment in a completely new, unique way. The Joker ‘lives' up to its name and does things a little differently - in its own way. In practice, this means a unique e-gaming gamble peer-to-peer game where the Joker will be implemented as a currency.

At a later stage, the Joker aims to conquer the world of live chat and create its own live chat platform in a completely original way. This all under one platform called the Joker app. Joker app means a revolution in using and understanding cryptocurrencies. Joker app will unify all lifestyle-related segments within one application and offer users the opportunity to draw various discounts and bonuses according to the volume of coins held.

Laser Scorebeta Last Audit: 30 November 2021

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Token is either risky or in presale. For presale 30+ is a fine score.

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

Reentrancy in JOKER._transfer(address,address,uint256) (#1003-1052):
External calls:
- swapAndLiquify(from,to) (#1040)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
- pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#428-434)
- Utils.swapTokensForEth(address(pancakeRouter),tokenAmountToBeSwapped) (#1243)
- Utils.addLiquidity(address(pancakeRouter),owner(),otherPiece,bnbToBeAddedToLiquidity) (#1255)
- Utils.swapETHForTokens(address(pancakeRouter),burnAddress,initialBalance.div(10)) (#1264)
External calls sending eth:
- swapAndLiquify(from,to) (#1040)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _rOwned[user] = _rOwned[user].add(amount.mul(_getRate())) (#1201)
- _rOwned[address(this)] = _rOwned[address(this)].add(rPoolFee) (#902)
- _rOwned[marketWallet] = _rOwned[marketWallet].add(rMarketFee) (#911)
- _rOwned[burnAddress] = _rOwned[burnAddress].add(rBurnFee) (#920)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1111)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1097)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1098)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1142)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1127)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1128)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1113)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1144)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _rTotal = _rTotal.sub(rFee) (#878)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _tOwned[user] = _tOwned[user].add(amount) (#1203)
- _tOwned[burnAddress] = _tOwned[burnAddress].add(burnFee) (#922)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1141)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1126)
- _tOwned[address(this)] = _tOwned[address(this)].add(tPoolFee) (#904)
- _tOwned[marketWallet] = _tOwned[marketWallet].add(tMarketFee) (#913)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1112)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1143)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- pool1Amount = 0 (#1157)
- pool1Amount = pool1Amount.add(amount.mul(pool1Percent).div(1000)) (#1191)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- pool2Amount = 0 (#1163)
- pool2Amount = pool2Amount.add(amount.mul(pool2Percent).div(1000)) (#1192)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- pool3Amount = 0 (#1169)
- pool3Amount = pool3Amount.add(amount.mul(pool3Percent).div(1000)) (#1193)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- pool4Amount = 0 (#1175)
- pool4Amount = pool4Amount.add(amount.mul(pool4Percent).div(1000)) (#1194)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- pool5Amount = 0 (#1181)
- pool5Amount = pool5Amount.add(amount.mul(pool5Percent).div(1000)) (#1195)
Apply the check-effects-interactions pattern.

Additional information: link

JOKER._takeBurnFee(uint256,uint256) (#917-924) performs a multiplication on the result of a division:
-burnFee = tAmount.mul(_burnFee).div(1e3) (#918)
-rBurnFee = burnFee.mul(currentRate) (#919)
Consider ordering multiplication before division.

Additional information: link

Utils.addLiquidity(address,address,uint256,uint256) (#458-475) ignores return value by pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
Ensure that all the return values of the function calls are used.

Additional information: link

JOKER._approve(address,address,uint256).owner (#966) shadows:
- Ownable.owner() (#169-171) (function)
Rename the local variables that shadow another component.

Additional information: link

JOKER.setLotteryPoolsPercent(uint256,uint256,uint256,uint256,uint256) (#858-864) should emit an event for:
- pool1Percent = _percent1 (#859)
- pool2Percent = _percent2 (#860)
- pool3Percent = _percent3 (#861)
- pool4Percent = _percent4 (#862)
- pool5Percent = _percent5 (#863)
Emit an event for critical parameter changes.

Additional information: link

JOKER.setMarketAddress(address)._marketAddress (#842) lacks a zero-check on :
- marketWallet = _marketAddress (#843)
Check that the address is not zero.

Additional information: link

Reentrancy in JOKER.transferFrom(address,address,uint256) (#689-693):
External calls:
- _transfer(sender,recipient,amount) (#690)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
- pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#428-434)
- Utils.swapTokensForEth(address(pancakeRouter),tokenAmountToBeSwapped) (#1243)
- Utils.addLiquidity(address(pancakeRouter),owner(),otherPiece,bnbToBeAddedToLiquidity) (#1255)
- Utils.swapETHForTokens(address(pancakeRouter),burnAddress,initialBalance.div(10)) (#1264)
External calls sending eth:
- _transfer(sender,recipient,amount) (#690)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,BEP20: transfer amount exceeds allowance)) (#691)
- _allowances[owner][spender] = amount (#970)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in JOKER.transferFrom(address,address,uint256) (#689-693):
External calls:
- _transfer(sender,recipient,amount) (#690)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
- pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#428-434)
- Utils.swapTokensForEth(address(pancakeRouter),tokenAmountToBeSwapped) (#1243)
- Utils.addLiquidity(address(pancakeRouter),owner(),otherPiece,bnbToBeAddedToLiquidity) (#1255)
- Utils.swapETHForTokens(address(pancakeRouter),burnAddress,initialBalance.div(10)) (#1264)
External calls sending eth:
- _transfer(sender,recipient,amount) (#690)
- pancakeRouter.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner,block.timestamp + 360) (#467-474)
- pancakeRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmount}(0,path,address(recipient),block.timestamp + 360) (#450-455)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#971)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,BEP20: transfer amount exceeds allowance)) (#691)
Apply the check-effects-interactions pattern.

Additional information: link

JOKER._transfer(address,address,uint256) (#1003-1052) uses timestamp for comparisons
Dangerous comparisons:
- block.timestamp < _launchTime + antiSnipingTime && from != address(pancakeRouter) (#1027)
Avoid relying on block.timestamp.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#132-153) uses assembly
- INLINE ASM (#145-148)
Do not use evm assembly.

Additional information: link

JOKER._transfer(address,address,uint256) (#1003-1052) compares to a boolean constant:
-_isExcludedFromMaxTx[from] == false && _isExcludedFromMaxTx[to] == false (#1018-1019)
Remove the equality to the boolean constant.

Additional information: link

SafeMath.mod(uint256,uint256,string) (#76-79) is never used and should be removed
Remove unused functions.

Additional information: link

JOKER._maxTxAmount (#585) is set pre-construction with a non-constant function or state variable:
- _tTotal.mul(2).div(1000)
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

solc-0.8.4 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._functionCallWithValue(address,bytes,uint256,string) (#132-153):
- (success,returndata) = target.call{value: weiValue}(data) (#136)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable JOKER._maxTxAmount (#585) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#88)" inContext (#82-91)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable JOKER._transferFromExcluded(address,address,uint256).rTransferAmount (#1125) is too similar to JOKER._transferFromExcluded(address,address,uint256).tTransferAmount (#1123)
Prevent variables from having similar names.

Additional information: link

JOKER.slitherConstructorVariables() (#523-1273) uses literals with too many digits:
- minTokenNumberToSell = _tTotal.div(100000) (#584)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

JOKER.burnAddress (#559) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

getContractBalance() should be declared external:
- JOKER.getContractBalance() (#974-976)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Average PancakeSwap trading volume, liqudity, number of swaps are extremely low. Token seems to be dead.


Token is deployed only at one blockchain


Token has only one trading pair


Unable to find PancakeSwap trading pair to compute liquidity.


Unable to find PancakeSwap trading pair to compute volume.


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


Twitter account link seems to be invalid


Unable to find Youtube account


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

Additional information: link


Token was delisted (assigned to inactive / untracked listing) from CoinMarketCap

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 token on CoinHunt

Additional information: link


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


Token has no active CoinMarketCap listing / rank


Young tokens have high risks of price dump / death


Young tokens have high risks of price dump / death


Token has relatively low CoinGecko rank

Price for JOKER