Gravitoken Token Logo

GRV [Gravi] Token

About GRV

Listings

Token 10 months
CoinMarketCap 9 months
white paper

Gravitoken is an elastic supply token on the Binance Smart Chain. The rebasing mechanism guarantees the price will rise by a minimum of 9.81% every 8 hours. Included in the token's functionality is a 9.81% transaction tax, which is shared between automated liquidity provision, token buyback and burn, and marketing.

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Laser Scorebeta Last Audit: 30 November 2021

report
Token seems to be a scam (type: rug pull scam).

Anti-Scam

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


Contract creator or owner is blacklisted for past scams

GRV.addLiquidity(uint256,uint256) (#953-967) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in GRV._transfer(address,address,uint256) (#795-830):
External calls:
- swapAndLiquify(numTokensSell) (#817)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (#927-933)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (#823)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
External calls sending eth:
- swapAndLiquify(numTokensSell) (#817)
- recipient.transfer(amount) (#913)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (#823)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
State variables written after the call(s):
- _tokenTransfer(from,to,value) (#827)
- _gonBalances[sender] = _gonBalances[sender].sub(gonValue) (#853)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(rFee) (#872)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonValue) (#854)
- _gonBalances[sender] = _gonBalances[sender].sub(gonDeduct) (#845)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonValue) (#846)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (#823)
- inSwapAndLiquify = true (#628)
- inSwapAndLiquify = false (#630)
Apply the check-effects-interactions pattern.

Additional information: link

GRV.burnAutoLP() (#1074-1080) ignores return value by uniswapV2Pair.transfer(owner(),balance) (#1079)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

Ownable._lockTime (#265) is never initialized. It is used in:
- Ownable.getUnlockTime() (#316-318)
- Ownable.unlock() (#329-334)
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


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.

GRV.addLiquidity(uint256,uint256) (#953-967) ignores return value by uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
Ensure that all the return values of the function calls are used.

Additional information: link

GRV._approve(address,address,uint256).owner (#988) shadows:
- Ownable.owner() (#286-288) (function)
Rename the local variables that shadow another component.

Additional information: link

GRV.setMaster(address) (#718-724) should emit an event for:
- master = _master (#723)
Emit an event for critical parameter changes.

Additional information: link

GRV.burnBNB(address).burnAddress (#1104) lacks a zero-check on :
- burnAddress.transfer(address(this).balance) (#1105)
Check that the address is not zero.

Additional information: link

Reentrancy in GRV.transferFrom(address,address,uint256) (#778-786):
External calls:
- _transfer(sender,recipient,amount) (#783)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (#927-933)
External calls sending eth:
- _transfer(sender,recipient,amount) (#783)
- recipient.transfer(amount) (#913)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
State variables written after the call(s):
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (#784)
- _allowedFragments[owner][spender] = value (#992)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in GRV.transferFrom(address,address,uint256) (#778-786):
External calls:
- _transfer(sender,recipient,amount) (#783)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (#927-933)
External calls sending eth:
- _transfer(sender,recipient,amount) (#783)
- recipient.transfer(amount) (#913)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
Event emitted after the call(s):
- Approval(owner,spender,value) (#993)
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (#784)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#329-334) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#331)
Avoid relying on block.timestamp.

Additional information: link

SafeMathInt.sub(int256,int256) (#465-473) is never used and should be removed
Remove unused functions.

Additional information: link

Parameter GRV.setnumTokensSellDivisor(uint256)._numTokensSellDivisor (#1101) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in GRV.transferFrom(address,address,uint256) (#778-786):
External calls:
- _transfer(sender,recipient,amount) (#783)
- recipient.transfer(amount) (#913)
External calls sending eth:
- _transfer(sender,recipient,amount) (#783)
- recipient.transfer(amount) (#913)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (#959-966)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (#944-949)
State variables written after the call(s):
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (#784)
- _allowedFragments[owner][spender] = value (#992)
Event emitted after the call(s):
- Approval(owner,spender,value) (#993)
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (#784)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router02.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#129) is too similar to IUniswapV2Router02.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#130)
Prevent variables from having similar names.

Additional information: link

GRV.slitherConstructorVariables() (#558-1108) uses literals with too many digits:
- deadAddress = 0x000000000000000000000000000000000000dEaD (#616)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

GRV.privateSaleDropCompleted (#625) is never used in GRV (#558-1108)
Remove unused state variables.

Additional information: link

Ownable._lockTime (#265) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

setnumTokensSellDivisor(uint256) should be declared external:
- GRV.setnumTokensSellDivisor(uint256) (#1101-1102)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.


Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.


Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.


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


Twitter account link seems to be invalid


Unable to find Youtube account


Unable to find Discord 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 contract audit


Unable to find audit link on the website


Unable to find whitepaper link on the website


Unable to find code repository for the project


Token is marked as scam (rug pull, honeypot, phishing, etc.)

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 CoinMarketCap listing / rank


Young tokens have high risks of price dump / death


Token has relatively low CoinGecko rank

Price for GRV