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OPV [OpenLive NFT] Token

About OPV

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Token 7 months
CoinMarketCap 7 months
white paper

OPENLIVE NFT is the pioneer platform in the NFT Marketplace which has been built for exchanging NFT tokens such as popular NFT platforms: Rarible, Opensea, Foundation, etc. We created an NFT market and NFT tokens evolution which is the only transparent and verifiable piece of information scarcity in the blockchain. We develop NFTs by mathematical verification of individual certificates or licenses. Our non-fungible tokens are used as collectibles and in-game items. NFT tokens (NFTs) are digital assets of unique value, and they are different from their crypto counterparts.

Laser Scorebeta Last Audit: 2 March 2022

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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...)

Ownable._lockTime (contracts/Ownable.sol#23) is never initialized. It is used in:
- Ownable.geUnlockTime() (contracts/Ownable.sol#74-76)
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

ERC20.transferToken(address,uint256,address) (contracts/ERC20.sol#490-499) ignores return value by IERC20(coinAddress).transfer(to,value) (contracts/ERC20.sol#498)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link


Not a direct threat, but may indicate unreliable intentions of developer. Widespread names (e.g. Elon, King, Moon, Doge) are common among meme-tokens and scams. The allow to gain free hype and attract unexperienced investors.

ERC20.allowance(address,address).owner (contracts/ERC20.sol#171) shadows:
- Ownable.owner() (contracts/Ownable.sol#40-42) (function)
ERC20._approve(address,address,uint256).owner (contracts/ERC20.sol#386) shadows:
- Ownable.owner() (contracts/Ownable.sol#40-42) (function)
Rename the local variables that shadow another component.

Additional information: link

ERC20.setNumTokensSell(uint256) (contracts/ERC20.sol#546-549) should emit an event for:
- _numTokensSellToAddToLiquidity = numTokensSellToAddToLiquidity * _decimals (contracts/ERC20.sol#547)
Emit an event for critical parameter changes.

Additional information: link

ERC20.modifyWhiteListPool(address[],address[]).index_scope_0 (contracts/ERC20.sol#536) is a local variable never initialized
ERC20.modifyWhiteListReceiver(address[],address[]).index (contracts/ERC20.sol#452) is a local variable never initialized
ERC20.modifyWhiteListPool(address[],address[]).index (contracts/ERC20.sol#533) is a local variable never initialized
ERC20.modifyWhiteListReceiver(address[],address[]).index_scope_0 (contracts/ERC20.sol#455) is a local variable never initialized
ERC20.modifyWhiteListBot(address[],address[]).index (contracts/ERC20.sol#507) is a local variable never initialized
ERC20.modifyWhiteListBot(address[],address[]).index_scope_0 (contracts/ERC20.sol#510) is a local variable never initialized
ERC20.modifyBlackList(address[],address[]).index_scope_0 (contracts/ERC20.sol#473) is a local variable never initialized
ERC20.modifyWhiteListSender(address[],address[]).index_scope_0 (contracts/ERC20.sol#437) is a local variable never initialized
ERC20.modifyBlackList(address[],address[]).index (contracts/ERC20.sol#470) is a local variable never initialized
ERC20.modifyWhiteListSender(address[],address[]).index (contracts/ERC20.sol#434) is a local variable never initialized
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

ERC20.transferToken(address,uint256,address).to (contracts/ERC20.sol#493) lacks a zero-check on :
- to.transfer(value) (contracts/ERC20.sol#496)
ERC20.changeFeeWallet(address).feeWallet (contracts/ERC20.sol#519) lacks a zero-check on :
- _feeWallet = feeWallet (contracts/ERC20.sol#520)
Check that the address is not zero.

Additional information: link

Reentrancy in Token.constructor() (contracts/Token.sol#15-25):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (contracts/Token.sol#21-22)
State variables written after the call(s):
- uniswapV2Router = _uniswapV2Router (contracts/Token.sol#24)
Apply the check-effects-interactions pattern.

Additional information: link

ERC20.transfer(address,uint256) (contracts/ERC20.sol#142-166) compares to a boolean constant:
-_msgSender() != owner() && whiteListSender[_msgSender()] == false && whiteListReceiver[recipient] == false (contracts/ERC20.sol#151-153)
ERC20.transfer(address,uint256) (contracts/ERC20.sol#142-166) compares to a boolean constant:
-_msgSender() == owner() || whiteListSender[_msgSender()] == true || whiteListReceiver[recipient] == true (contracts/ERC20.sol#159-161)
ERC20.transferFrom(address,address,uint256) (contracts/ERC20.sol#211-238) compares to a boolean constant:
-sender != owner() && whiteListSender[_msgSender()] == false && whiteListSender[sender] == false && whiteListReceiver[recipient] == false (contracts/ERC20.sol#219-222)
Token._transfer(address,address,uint256) (contracts/Token.sol#31-55) compares to a boolean constant:
-amount > _numTokensSellToAddToLiquidity && limitSell == true && recipient == uniswapV2Pair (contracts/Token.sol#47-49)
Remove the equality to the boolean constant.

Additional information: link

Different versions of Solidity is used:
- Version used: ['0.7.4', '^0.7.4']
- 0.7.4 (contracts/Context.sol#3)
- ^0.7.4 (contracts/ERC20.sol#3)
- 0.7.4 (contracts/IERC20.sol#3)
- 0.7.4 (contracts/Ownable.sol#3)
- 0.7.4 (contracts/SafeMath.sol#3)
- 0.7.4 (contracts/Token.sol#2)
- 0.7.4 (contracts/Uniswap.sol#2)
Use one Solidity version.

Additional information: link

Context._msgData() (contracts/Context.sol#20-23) is never used and should be removed
ERC20._setupDecimals(uint8) (contracts/ERC20.sol#404-406) is never used and should be removed
SafeMath.div(uint256,uint256,string) (contracts/SafeMath.sol#190-193) is never used and should be removed
SafeMath.mod(uint256,uint256) (contracts/SafeMath.sol#152-155) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (contracts/SafeMath.sol#210-213) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (contracts/SafeMath.sol#24-28) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (contracts/SafeMath.sol#60-63) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (contracts/SafeMath.sol#70-73) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (contracts/SafeMath.sol#45-53) is never used and should be removed
SafeMath.trySub(uint256,uint256) (contracts/SafeMath.sol#35-38) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version0.7.4 (contracts/Context.sol#3) allows old versions
Pragma version^0.7.4 (contracts/ERC20.sol#3) allows old versions
Pragma version0.7.4 (contracts/IERC20.sol#3) allows old versions
Pragma version0.7.4 (contracts/Ownable.sol#3) allows old versions
Pragma version0.7.4 (contracts/SafeMath.sol#3) allows old versions
Pragma version0.7.4 (contracts/Token.sol#2) allows old versions
Pragma version0.7.4 (contracts/Uniswap.sol#2) allows old versions
solc-0.7.4 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

Parameter ERC20.setAntiBot(bool)._enable (contracts/ERC20.sol#482) is not in mixedCase
Parameter ERC20.setSwapWhiteList(bool)._enable (contracts/ERC20.sol#486) is not in mixedCase
Parameter ERC20.setLimitSell(bool)._enable (contracts/ERC20.sol#551) is not in mixedCase
Variable ERC20._feeTransfer (contracts/ERC20.sol#57) is not in mixedCase
Variable ERC20._feeWallet (contracts/ERC20.sol#59) is not in mixedCase
Variable ERC20._numTokensSellToAddToLiquidity (contracts/ERC20.sol#60) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (contracts/Uniswap.sol#67) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (contracts/Uniswap.sol#69) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (contracts/Uniswap.sol#99) is not in mixedCase
Function IUniswapV2Router01.WETH() (contracts/Uniswap.sol#143) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (contracts/Context.sol#21)" inContext (contracts/Context.sol#15-25)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (contracts/Uniswap.sol#148) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (contracts/Uniswap.sol#149)
Prevent variables from having similar names.

Additional information: link

Ownable._previousOwner (contracts/Ownable.sol#22) is never used in Token (contracts/Token.sol#7-59)
Remove unused state variables.

Additional information: link

Ownable._lockTime (contracts/Ownable.sol#23) should be constant
Ownable._previousOwner (contracts/Ownable.sol#22) should be constant
Token.maxSupply (contracts/Token.sol#10) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

name() should be declared external:
- ERC20.name() (contracts/ERC20.sol#85-87)
symbol() should be declared external:
- ERC20.symbol() (contracts/ERC20.sol#93-95)
decimals() should be declared external:
- ERC20.decimals() (contracts/ERC20.sol#110-112)
totalSupply() should be declared external:
- ERC20.totalSupply() (contracts/ERC20.sol#117-119)
balanceOf(address) should be declared external:
- ERC20.balanceOf(address) (contracts/ERC20.sol#124-132)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (contracts/ERC20.sol#142-166)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (contracts/ERC20.sol#171-179)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (contracts/ERC20.sol#188-196)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (contracts/ERC20.sol#211-238)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (contracts/ERC20.sol#252-263)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (contracts/ERC20.sol#279-293)
modifyWhiteListSender(address[],address[]) should be declared external:
- ERC20.modifyWhiteListSender(address[],address[]) (contracts/ERC20.sol#428-440)
isExcludedFromFee(address) should be declared external:
- ERC20.isExcludedFromFee(address) (contracts/ERC20.sol#442-444)
modifyWhiteListReceiver(address[],address[]) should be declared external:
- ERC20.modifyWhiteListReceiver(address[],address[]) (contracts/ERC20.sol#446-458)
isExcludedToFee(address) should be declared external:
- ERC20.isExcludedToFee(address) (contracts/ERC20.sol#460-462)
modifyBlackList(address[],address[]) should be declared external:
- ERC20.modifyBlackList(address[],address[]) (contracts/ERC20.sol#464-476)
isBlackList(address) should be declared external:
- ERC20.isBlackList(address) (contracts/ERC20.sol#478-480)
transferToken(address,uint256,address) should be declared external:
- ERC20.transferToken(address,uint256,address) (contracts/ERC20.sol#490-499)
modifyWhiteListBot(address[],address[]) should be declared external:
- ERC20.modifyWhiteListBot(address[],address[]) (contracts/ERC20.sol#501-513)
isExcludedFromBot(address) should be declared external:
- ERC20.isExcludedFromBot(address) (contracts/ERC20.sol#515-517)
changeFeeWallet(address) should be declared external:
- ERC20.changeFeeWallet(address) (contracts/ERC20.sol#519-521)
changeFee(uint256) should be declared external:
- ERC20.changeFee(uint256) (contracts/ERC20.sol#523-525)
modifyWhiteListPool(address[],address[]) should be declared external:
- ERC20.modifyWhiteListPool(address[],address[]) (contracts/ERC20.sol#527-539)
isExcludedFromPool(address) should be declared external:
- ERC20.isExcludedFromPool(address) (contracts/ERC20.sol#541-543)
setNumTokensSell(uint256) should be declared external:
- ERC20.setNumTokensSell(uint256) (contracts/ERC20.sol#546-549)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (contracts/Ownable.sol#59-62)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (contracts/Ownable.sol#68-72)
geUnlockTime() should be declared external:
- Ownable.geUnlockTime() (contracts/Ownable.sol#74-76)
burn(uint256) should be declared external:
- Token.burn(uint256) (contracts/Token.sol#27-29)
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


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 verify token contract address on the website


Unable to find audit link on the website


Unable to find whitepaper link on the website


Unable to find Telegram link on the website


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


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

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