GRX [GravitX] Token
About GRX
Listings
Website
GRX is an elastic supply token build on the Binance smart chain, designed to rise by a minimum of 12% every 8 hours. That's the best rate of rise guarantee you can find !
How does it work?
An elastic supply (or rebase) token works in a way that the circulating supply expands or contracts due to changes in token price.
This increase or decrease in supply works with a mechanism called re-basing. When a rebase occurs, the supply of the token is increased or decreased algorithmically, based on the current price of each token. In some ways, elastic supply tokens can be paralleled with stablecoins.
They aim to achieve a target price, and these re-base mechanics facilitate that. However, the key difference is that rebasing tokens aim to achieve it with a changing (elastic) supply. GRX differs by having an increasing peg price and no positive rebases, making GRX an AntiGravity upcoin. We called this new tech the AntiGravity Contract.
Social
Laser Scorebeta Last Audit: 30 November 2021
Anti-Scam
Links
Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)
GRX.addLiquidity(uint256,uint256) (contracts/GRX.sol#954-968) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
Ensure that an arbitrary user cannot withdraw unauthorized funds.
Additional information: link
Reentrancy in GRX._transfer(address,address,uint256) (contracts/GRX.sol#796-831):
External calls:
- swapAndLiquify(numTokensSell) (contracts/GRX.sol#818)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (contracts/GRX.sol#928-934)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (contracts/GRX.sol#824)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
External calls sending eth:
- swapAndLiquify(numTokensSell) (contracts/GRX.sol#818)
- recipient.transfer(amount) (contracts/GRX.sol#914)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (contracts/GRX.sol#824)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
State variables written after the call(s):
- _tokenTransfer(from,to,value) (contracts/GRX.sol#828)
- _gonBalances[sender] = _gonBalances[sender].sub(gonValue) (contracts/GRX.sol#854)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(rFee) (contracts/GRX.sol#873)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonValue) (contracts/GRX.sol#855)
- _gonBalances[sender] = _gonBalances[sender].sub(gonDeduct) (contracts/GRX.sol#846)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonValue) (contracts/GRX.sol#847)
- buyBackTokens(buybackLimit.div(buybackDivisor)) (contracts/GRX.sol#824)
- inSwapAndLiquify = true (contracts/GRX.sol#629)
- inSwapAndLiquify = false (contracts/GRX.sol#631)
Apply the check-effects-interactions pattern.
Additional information: link
GRX.burnAutoLP() (contracts/GRX.sol#1075-1081) ignores return value by uniswapV2Pair.transfer(owner(),balance) (contracts/GRX.sol#1080)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.
Additional information: link
Ownable._lockTime (contracts/GRX.sol#265) is never initialized. It is used in:
- Ownable.getUnlockTime() (contracts/GRX.sol#316-318)
- Ownable.unlock() (contracts/GRX.sol#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.
GRX.setMaster(address) (contracts/GRX.sol#719-725) should emit an event for:
- master = _master (contracts/GRX.sol#724)
Emit an event for critical parameter changes.
Additional information: link
GRX.addLiquidity(uint256,uint256) (contracts/GRX.sol#954-968) ignores return value by uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
Ensure that all the return values of the function calls are used.
Additional information: link
GRX._approve(address,address,uint256).owner (contracts/GRX.sol#989) shadows:
- Ownable.owner() (contracts/GRX.sol#286-288) (function)
Rename the local variables that shadow another component.
Additional information: link
GRX.burnBNB(address).burnAddress (contracts/GRX.sol#1105) lacks a zero-check on :
- burnAddress.transfer(address(this).balance) (contracts/GRX.sol#1106)
Check that the address is not zero.
Additional information: link
Reentrancy in GRX.transferFrom(address,address,uint256) (contracts/GRX.sol#779-787):
External calls:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (contracts/GRX.sol#928-934)
External calls sending eth:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- recipient.transfer(amount) (contracts/GRX.sol#914)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
State variables written after the call(s):
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (contracts/GRX.sol#785)
- _allowedFragments[owner][spender] = value (contracts/GRX.sol#993)
Apply the check-effects-interactions pattern.
Additional information: link
Reentrancy in GRX.transferFrom(address,address,uint256) (contracts/GRX.sol#779-787):
External calls:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(300)) (contracts/GRX.sol#928-934)
External calls sending eth:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- recipient.transfer(amount) (contracts/GRX.sol#914)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
Event emitted after the call(s):
- Approval(owner,spender,value) (contracts/GRX.sol#994)
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (contracts/GRX.sol#785)
Apply the check-effects-interactions pattern.
Additional information: link
Ownable.unlock() (contracts/GRX.sol#329-334) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (contracts/GRX.sol#331)
Avoid relying on block.timestamp.
Additional information: link
SafeMathInt.sub(int256,int256) (contracts/GRX.sol#465-473) is never used and should be removed
Remove unused functions.
Additional information: link
Parameter GRX.setnumTokensSellDivisor(uint256)._numTokensSellDivisor (contracts/GRX.sol#1102) is not in mixedCase
Follow the Solidity naming convention.
Additional information: link
Reentrancy in GRX.transferFrom(address,address,uint256) (contracts/GRX.sol#779-787):
External calls:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- recipient.transfer(amount) (contracts/GRX.sol#914)
External calls sending eth:
- _transfer(sender,recipient,amount) (contracts/GRX.sol#784)
- recipient.transfer(amount) (contracts/GRX.sol#914)
- uniswapV2Router.addLiquidityETH.value(ethAmount)(address(this),tokenAmount,0,0,address(this),block.timestamp.add(300)) (contracts/GRX.sol#960-967)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens.value(amount)(0,path,deadAddress,block.timestamp.add(300)) (contracts/GRX.sol#945-950)
State variables written after the call(s):
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (contracts/GRX.sol#785)
- _allowedFragments[owner][spender] = value (contracts/GRX.sol#993)
Event emitted after the call(s):
- Approval(owner,spender,value) (contracts/GRX.sol#994)
- _approve(sender,msg.sender,_allowedFragments[sender][msg.sender].sub(amount)) (contracts/GRX.sol#785)
Apply the check-effects-interactions pattern.
Additional information: link
Variable IUniswapV2Router02.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (contracts/GRX.sol#129) is too similar to IUniswapV2Router02.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (contracts/GRX.sol#130)
Prevent variables from having similar names.
Additional information: link
GRX.slitherConstructorVariables() (contracts/GRX.sol#557-1110) uses literals with too many digits:
- deadAddress = 0x000000000000000000000000000000000000dEaD (contracts/GRX.sol#617)
Use: Ether suffix, Time suffix, or The scientific notation
Additional information: link
GRX.privateSaleDropCompleted (contracts/GRX.sol#626) is never used in GRX (contracts/GRX.sol#557-1110)
Remove unused state variables.
Additional information: link
Ownable._lockTime (contracts/GRX.sol#265) should be constant
Add the constant attributes to state variables that never change.
Additional information: link
setnumTokensSellDivisor(uint256) should be declared external:
- GRX.setnumTokensSellDivisor(uint256) (contracts/GRX.sol#1102-1103)
Use the external attribute for functions never called from the contract.
Additional information: link
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.
Unable to crawl data from the website
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 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 Twitter 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
Token has relatively low CoinGecko rank
Price for GRX
LASER DESK beta
Twitter account link seems to be invalid
Unable to find Youtube account
Unable to find Discord account