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SLD [Step Land] Token

About SLD

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Token 2 years
white paper

Step Land is built around an essential daily activity – moving around. Users equip themselves with NFTs in the form of shoes. By walking, jogging, or running outdoors, users will earn game tokens, which can either be used in-game, or cashed-in for profit.

Laser Scorebeta Last Audit: 15 June 2022

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

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SLD.withdraw(address,uint256) (contracts/SLD.sol#275-290) ignores return value by IERC20(token).transfer(_msgSender(),amount) (contracts/SLD.sol#289)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link


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


Contract ownership is not renounced (belongs to a wallet)

Reentrancy in SLD._transfer(address,address,uint256) (contracts/SLD.sol#158-190):
External calls:
- swapTokensForEth(contractTokenBalance,marketingAccount) (contracts/SLD.sol#174)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,receiver,block.timestamp) (contracts/SLD.sol#201-207)
State variables written after the call(s):
- balances[from] = balances[from].sub(amount) (contracts/SLD.sol#178)
- balances[address(this)] = balances[address(this)].add(tradeFeeAmount) (contracts/SLD.sol#182-184)
- balances[to] = balances[to].add(toAmount) (contracts/SLD.sol#188)
- inSwap = false (contracts/SLD.sol#175)
Apply the check-effects-interactions pattern.

Additional information: link

SLD.balanceOf(address)._owner (contracts/SLD.sol#236) shadows:
- Ownable._owner (@openzeppelin/contracts/access/Ownable.sol#21) (state variable)
SLD._approve(address,address,uint256).owner (contracts/SLD.sol#246) shadows:
- Ownable.owner() (@openzeppelin/contracts/access/Ownable.sol#35-37) (function)
SLD.allowance(address,address)._owner (contracts/SLD.sol#266) shadows:
- Ownable._owner (@openzeppelin/contracts/access/Ownable.sol#21) (state variable)
Rename the local variables that shadow another component.

Additional information: link

SLD.setFee(uint256) (contracts/SLD.sol#145-148) should emit an event for:
- fee = newFee (contracts/SLD.sol#147)
SLD.setSwapTokensAtAmount(uint256) (contracts/SLD.sol#150-152) should emit an event for:
- swapTokensAtAmount = newValue (contracts/SLD.sol#151)
Emit an event for critical parameter changes.

Additional information: link

SLD.constructor(string,string,uint8,uint256,uint256,uint256,address,address)._marketingAccount (contracts/SLD.sol#116) lacks a zero-check on :
- marketingAccount = _marketingAccount (contracts/SLD.sol#133)
Check that the address is not zero.

Additional information: link

Reentrancy in SLD.constructor(string,string,uint8,uint256,uint256,uint256,address,address) (contracts/SLD.sol#108-139):
External calls:
- uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH()) (contracts/SLD.sol#128-131)
State variables written after the call(s):
- isWhitelisted[msg.sender] = true (contracts/SLD.sol#136)
- isWhitelisted[address(this)] = true (contracts/SLD.sol#137)
- isWhitelisted[marketingAccount] = true (contracts/SLD.sol#138)
- marketingAccount = _marketingAccount (contracts/SLD.sol#133)
Reentrancy in SLD.transferFrom(address,address,uint256) (contracts/SLD.sol#219-234):
External calls:
- _transfer(_from,_to,_value) (contracts/SLD.sol#224)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,receiver,block.timestamp) (contracts/SLD.sol#201-207)
State variables written after the call(s):
- _approve(_from,msg.sender,allowed[_from][msg.sender].sub(_value,ERC20: transfer amount exceeds allowance)) (contracts/SLD.sol#225-232)
- allowed[owner][spender] = amount (contracts/SLD.sol#253)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in SLD._transfer(address,address,uint256) (contracts/SLD.sol#158-190):
External calls:
- swapTokensForEth(contractTokenBalance,marketingAccount) (contracts/SLD.sol#174)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,receiver,block.timestamp) (contracts/SLD.sol#201-207)
Event emitted after the call(s):
- Transfer(from,address(this),tradeFeeAmount) (contracts/SLD.sol#185)
- Transfer(from,to,toAmount) (contracts/SLD.sol#189)
Reentrancy in SLD.transferFrom(address,address,uint256) (contracts/SLD.sol#219-234):
External calls:
- _transfer(_from,_to,_value) (contracts/SLD.sol#224)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,receiver,block.timestamp) (contracts/SLD.sol#201-207)
Event emitted after the call(s):
- Approval(owner,spender,amount) (contracts/SLD.sol#254)
- _approve(_from,msg.sender,allowed[_from][msg.sender].sub(_value,ERC20: transfer amount exceeds allowance)) (contracts/SLD.sol#225-232)
Apply the check-effects-interactions pattern.

Additional information: link

Context._msgData() (@openzeppelin/contracts/utils/Context.sol#21-23) is never used and should be removed
SafeMath.div(uint256,uint256,string) (@openzeppelin/contracts/utils/math/SafeMath.sol#191-200) is never used and should be removed
SafeMath.mod(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#151-153) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (@openzeppelin/contracts/utils/math/SafeMath.sol#217-226) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#22-28) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#64-69) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#76-81) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#47-57) is never used and should be removed
SafeMath.trySub(uint256,uint256) (@openzeppelin/contracts/utils/math/SafeMath.sol#35-40) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.0 (@openzeppelin/contracts/access/Ownable.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/utils/Context.sol#4) allows old versions
Pragma version^0.8.0 (@openzeppelin/contracts/utils/math/SafeMath.sol#4) allows old versions
Pragma version^0.8.0 (contracts/SLD.sol#2) 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

Function IUniswapV2Router01.WETH() (contracts/SLD.sol#23) is not in mixedCase
Parameter SLD.transfer(address,uint256)._to (contracts/SLD.sol#210) is not in mixedCase
Parameter SLD.transfer(address,uint256)._value (contracts/SLD.sol#210) is not in mixedCase
Parameter SLD.transferFrom(address,address,uint256)._from (contracts/SLD.sol#220) is not in mixedCase
Parameter SLD.transferFrom(address,address,uint256)._to (contracts/SLD.sol#221) is not in mixedCase
Parameter SLD.transferFrom(address,address,uint256)._value (contracts/SLD.sol#222) is not in mixedCase
Parameter SLD.balanceOf(address)._owner (contracts/SLD.sol#236) is not in mixedCase
Parameter SLD.approve(address,uint256)._spender (contracts/SLD.sol#257) is not in mixedCase
Parameter SLD.approve(address,uint256)._value (contracts/SLD.sol#257) is not in mixedCase
Parameter SLD.allowance(address,address)._owner (contracts/SLD.sol#266) is not in mixedCase
Parameter SLD.allowance(address,address)._spender (contracts/SLD.sol#266) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

SLD.MAX_UINT256 (contracts/SLD.sol#87) is never used in SLD (contracts/SLD.sol#84-291)
Remove unused state variables.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (@openzeppelin/contracts/access/Ownable.sol#54-56)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (@openzeppelin/contracts/access/Ownable.sol#62-65)
setWhitelist(address,bool) should be declared external:
- SLD.setWhitelist(address,bool) (contracts/SLD.sol#141-143)
setFee(uint256) should be declared external:
- SLD.setFee(uint256) (contracts/SLD.sol#145-148)
setSwapTokensAtAmount(uint256) should be declared external:
- SLD.setSwapTokensAtAmount(uint256) (contracts/SLD.sol#150-152)
transfer(address,uint256) should be declared external:
- SLD.transfer(address,uint256) (contracts/SLD.sol#210-217)
transferFrom(address,address,uint256) should be declared external:
- SLD.transferFrom(address,address,uint256) (contracts/SLD.sol#219-234)
approve(address,uint256) should be declared external:
- SLD.approve(address,uint256) (contracts/SLD.sol#257-264)
allowance(address,address) should be declared external:
- SLD.allowance(address,address) (contracts/SLD.sol#266-273)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Token seems to be untradeable: there is no PancakeSwap trading pair and no trading volumes. Ignore for presale.


Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.


Unable to find Discord account


Twitter account has few posts


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

Additional information: link


Unable to find token contract audit


Unable to find audit link on the website


Unable to find token on CoinGecko

Additional information: link


Unable to find token on CoinMarketCap

Additional information: link


Token is not listed at Mobula.Finance

Additional information: link


Unable to find token on CoinHunt

Additional information: link


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

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