CryptoZeroFi is a combat role-playing NFT game built on the Binance Smart Chain with Zero Fee goal and Metaverse orientation 🔥 PARTNERS: ✅Halving Capital ✅UB Ventures ✅AlphaTrue ✅Binstarter ✅KingdomGame ✅YAYGames ✅DAO KonDR ✅SAFELaunch 🔥AUDITED BY CERTIK 🔥 OFFICIAL GAME (iOS & Android) LAUNCHED 🎁Participants will receive 1 NFT BOX for each 1 BNB participating in Fairlaunch
ZefiBase.emergencySweepToken(address) (#1398-1400) ignores return value by IERC20(_token).transfer(_msgSender(),IERC20(_token).balanceOf(address(this))) (#1399)
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)
Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#648) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#649)
Prevent variables from having similar names.
Additional information: link
Zefi.ownerAddress (#1420) should be constant
Add the constant attributes to state variables that never change.
Additional information: link
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#567) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#569) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#599) is not in mixedCase
Function IUniswapV2Router01.WETH() (#643) is not in mixedCase
Parameter ZefiBase.setAntiBotAmount(uint256)._buyMaxAmount (#1391) is not in mixedCase
Parameter ZefiBase.emergencySweepToken(address)._token (#1398) is not in mixedCase
Parameter ZefiBase.emergencySweepNFT(address,uint256)._nft (#1402) is not in mixedCase
Parameter ZefiBase.emergencySweepNFT(address,uint256)._tId (#1402) is not in mixedCase
Constant ZefiBase.botGuardDuration (#1384) is not in UPPER_CASE_WITH_UNDERSCORES
Constant ZefiBase.buyFeeRate (#1386) is not in UPPER_CASE_WITH_UNDERSCORES
Constant ZefiBase.sellFeeRate (#1387) is not in UPPER_CASE_WITH_UNDERSCORES
Parameter Zefi.setFeeAddress(address)._feeAddress (#1520) is not in mixedCase
Parameter Zefi.setFeeExempt(address,bool)._add (#1523) is not in mixedCase
Parameter Zefi.setFeeExempt(address,bool)._val (#1523) is not in mixedCase
Constant Zefi.maxSupply (#1411) is not in UPPER_CASE_WITH_UNDERSCORES
Variable Zefi._feeExempt (#1415) is not in mixedCase
Follow the Solidity naming convention.
Additional information: link
Redundant expression "this (#21)" inContext (#15-24)
Remove redundant statements if they congest code but offer no value.
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ZefiBase.constructor(string,string).name (#1389) shadows:
- ERC20.name() (#1132-1134) (function)
ZefiBase.constructor(string,string).symbol (#1389) shadows:
- ERC20.symbol() (#1140-1142) (function)
Rename the local variables that shadow another component.
Additional information: link
ZefiBase.setAntiBotAmount(uint256) (#1391) should emit an event for:
- antiBotBuyAmount = _buyMaxAmount (#1391)
Emit an event for critical parameter changes.
Additional information: link
Zefi.setFeeAddress(address)._feeAddress (#1520) lacks a zero-check on :
- feeAddress = _feeAddress (#1520)
Check that the address is not zero.
Additional information: link
Reentrancy in Zefi.constructor() (#1424-1441):
External calls:
- uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH()) (#1431-1432)
State variables written after the call(s):
- _feeExempt[_msgSender()] = true (#1436)
- _transferOwnership(ownerAddress) (#1440)
- _owner = newOwner (#94)
- antiBotBuyAmount = 37000 * 10 ** 18 (#1434)
- botGuard = true (#1437)
- feeAddress = _msgSender() (#1435)
- isSetLiquidity = true (#1438)
Apply the check-effects-interactions pattern.
Additional information: link
Reentrancy in Zefi.constructor() (#1424-1441):
External calls:
- uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH()) (#1431-1432)
Event emitted after the call(s):
- OwnershipTransferred(_owner,newOwner) (#93)
- _transferOwnership(ownerAddress) (#1440)
Apply the check-effects-interactions pattern.
Additional information: link
Zefi._transfer(address,address,uint256) (#1447-1515) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(liquidityTime != 0,ZERI: LIQUIDITY HAVENT SET) (#1456)
- require(bool,string)(block.timestamp != liquidityBlock,ZERI: LIQUIDITY HAVENT SET) (#1458)
- ! isSetLiquidity && (time_since_ld > botGuardDuration) (#1480)
- time_since_ld > 900 (#1474-1477)
- time_since_ld > 600 (#1474-1477)
- time_since_ld > 300 (#1474-1477)
Avoid relying on block.timestamp.
Additional information: link
Address.isContract(address) (#336-345) uses assembly
- INLINE ASM (#343)
Address._verifyCallResult(bool,bytes,string) (#481-498) uses assembly
- INLINE ASM (#490-493)
Do not use evm assembly.
Additional information: link
Different versions of Solidity is used:
- Version used: ['>=0.6.0<0.8.0', '>=0.6.2<0.8.0', '^0.7.6']
- >=0.6.0<0.8.0 (#3)
- >=0.6.0<0.8.0 (#27)
- >=0.6.0<0.8.0 (#99)
- >=0.6.2<0.8.0 (#313)
- ^0.7.6 (#502)
- >=0.6.0<0.8.0 (#847)
- >=0.6.2<0.8.0 (#871)
- >=0.6.0<0.8.0 (#998)
- >=0.6.0<0.8.0 (#1075)
- ^0.7.6 (#1377)
Use one Solidity version.
Additional information: link
Address._verifyCallResult(bool,bytes,string) (#481-498) is never used and should be removed
Address.functionCall(address,bytes) (#389-391) is never used and should be removed
Address.functionCall(address,bytes,string) (#399-401) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#414-416) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#424-431) is never used and should be removed
Address.functionDelegateCall(address,bytes) (#463-465) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (#473-479) is never used and should be removed
Address.functionStaticCall(address,bytes) (#439-441) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (#449-455) is never used and should be removed
Address.isContract(address) (#336-345) is never used and should be removed
Address.sendValue(address,uint256) (#363-369) is never used and should be removed
Context._msgData() (#20-23) is never used and should be removed
ERC20._setupDecimals(uint8) (#1355-1357) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#286-289) is never used and should be removed
SafeMath.mod(uint256,uint256) (#248-251) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#306-309) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#120-124) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (#156-159) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#166-169) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#141-149) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#131-134) is never used and should be removed
Remove unused functions.
Additional information: link
Pragma version>=0.6.0<0.8.0 (#3) is too complex
Pragma version>=0.6.0<0.8.0 (#27) is too complex
Pragma version>=0.6.0<0.8.0 (#99) is too complex
Pragma version>=0.6.2<0.8.0 (#313) is too complex
Pragma version>=0.6.0<0.8.0 (#847) is too complex
Pragma version>=0.6.2<0.8.0 (#871) is too complex
Pragma version>=0.6.0<0.8.0 (#998) is too complex
Pragma version>=0.6.0<0.8.0 (#1075) is too complex
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.sendValue(address,uint256) (#363-369):
- (success) = recipient.call{value: amount}() (#367)
Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (#424-431):
- (success,returndata) = target.call{value: value}(data) (#429)
Low level call in Address.functionStaticCall(address,bytes,string) (#449-455):
- (success,returndata) = target.staticcall(data) (#453)
Low level call in Address.functionDelegateCall(address,bytes,string) (#473-479):
- (success,returndata) = target.delegatecall(data) (#477)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#78-81)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#87-89)
name() should be declared external:
- ERC20.name() (#1132-1134)
symbol() should be declared external:
- ERC20.symbol() (#1140-1142)
decimals() should be declared external:
- ERC20.decimals() (#1157-1159)
totalSupply() should be declared external:
- ERC20.totalSupply() (#1164-1166)
balanceOf(address) should be declared external:
- ERC20.balanceOf(address) (#1171-1173)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#1183-1186)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#1191-1193)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#1202-1205)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#1220-1224)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#1238-1241)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#1257-1260)
setAntiBotAmount(uint256) should be declared external:
- ZefiBase.setAntiBotAmount(uint256) (#1391)
emergencySweepBNB() should be declared external:
- ZefiBase.emergencySweepBNB() (#1394-1396)
emergencySweepToken(address) should be declared external:
- ZefiBase.emergencySweepToken(address) (#1398-1400)
emergencySweepNFT(address,uint256) should be declared external:
- ZefiBase.emergencySweepNFT(address,uint256) (#1402-1404)
burn(uint256) should be declared external:
- Zefi.burn(uint256) (#1443-1445)
setFeeAddress(address) should be declared external:
- Zefi.setFeeAddress(address) (#1520)
setFeeExempt(address,bool) should be declared external:
- Zefi.setFeeExempt(address,bool) (#1523-1528)
Use the external attribute for functions never called from the contract.
Additional information: link
Contract ticker (ZERI_V2) contains non-alphanumeric characters.
Not a direct threat, but may indicate unreliable intentions of developer. Non-alphanumeric chars (,.;!#*&") are extremely rare among low risk tokens.
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 KYC or doxxing proof
Unable to verify that token and website are owned by the same team (no listings + unable to find contract on website)
Unable to verify token contract address on the website
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
Unable to find code repository for the project
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
Young tokens have high risks of price dump / death
Last post in Twitter was more than 30 days ago
Unable to find Blog account (Reddit or Medium)
Unable to find Youtube account