Sombra is a social NFT marketplace and gaming eco system created to bring collectors, artists and innovators together all wrapped up into an elegant dapp solution. Sombra makes the impossible possible. With deep roots in Hollywood VFX, digital art creation, economics and multilevel company management, Sombra’s partners have years of experience at the highest levels and will deliver you to the next renaissance of digital technology and art.
Sombra is the future.
Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)
Sombra.addLiquidity(uint256,uint256) (#986-996) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#988-995)
Ensure that an arbitrary user cannot withdraw unauthorized funds.
Additional information: link
Reentrancy in Sombra._transfer(address,address,uint256) (#800-840):
External calls:
- this.swapAndLiquify(numTokens) (#827)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#839)
- _rOwned[address(this)] = _rOwned[address(this)] + rLiquidity (#763)
- _rOwned[sender] -= rAmount (#906)
- _rOwned[sender] -= rAmount (#862)
- _rOwned[recipient] += rTransferAmount (#931)
- _rOwned[recipient] += rTransferAmount (#864)
- _tokenTransfer(from,to,amount,takeFee) (#839)
- _rSupply = _rSupply - rFee (#753)
- _rSupply -= rLiquidity (#760)
- _rSupply += rAmount (#934)
- _rSupply += (rAmount - rTransferAmount) (#888)
- _rSupply -= rTransferAmount (#911)
- _tokenTransfer(from,to,amount,takeFee) (#839)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (#759)
- _tOwned[sender] -= tAmount (#883)
- _tOwned[sender] -= tAmount (#929)
- _tOwned[recipient] += tTransferAmount (#908)
- _tOwned[recipient] += tTransferAmount (#885)
- _tokenTransfer(from,to,amount,takeFee) (#839)
- _tSupply -= tLiquidity (#761)
- _tSupply -= tTransferAmount (#912)
- _tSupply += tAmount (#935)
- _tSupply += (tAmount - tTransferAmount) (#889)
Apply the check-effects-interactions pattern.
Additional information: link
Sombra.addLiquidity(uint256,uint256) (#986-996) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#988-995)
Ensure that all the return values of the function calls are used.
Additional information: link
Sombra._approve(address,address,uint256).owner (#780) shadows:
- Ownable.owner() (#368-370) (function)
Rename the local variables that shadow another component.
Additional information: link
Timelock.executeTransaction(address,uint256,string,bytes,uint256).target (#1306) lacks a zero-check on :
- (success,returnData) = target.call{value: value}(callData) (#1327)
Check that the address is not zero.
Additional information: link
Reentrancy in Sombra.transferFrom(address,address,uint256) (#533-542):
External calls:
- _transfer(sender,recipient,amount) (#534)
- this.swapAndLiquify(numTokens) (#827)
State variables written after the call(s):
- _approve(sender,_msgSender(),currentAllowance - amount) (#539)
- _allowances[owner][spender] = amount (#784)
Apply the check-effects-interactions pattern.
Additional information: link
Reentrancy in Sombra.transferFrom(address,address,uint256) (#533-542):
External calls:
- _transfer(sender,recipient,amount) (#534)
- this.swapAndLiquify(numTokens) (#827)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#785)
- _approve(sender,_msgSender(),currentAllowance - amount) (#539)
Apply the check-effects-interactions pattern.
Additional information: link
Timelock.executeTransaction(address,uint256,string,bytes,uint256) (#1306-1333) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(getBlockTimestamp() >= eta,Timelock::executeTransaction: Transaction hasn't surpassed time lock.) (#1311)
- require(bool,string)(getBlockTimestamp() <= eta + GRACE_PERIOD,Timelock::executeTransaction: Transaction is stale.) (#1313)
Avoid relying on block.timestamp.
Additional information: link
Address.verifyCallResult(bool,bytes,string) (#218-238) uses assembly
- INLINE ASM (#230-233)
Do not use evm assembly.
Additional information: link
Context._msgData() (#23-25) is never used and should be removed
Remove unused functions.
Additional information: link
solc-0.8.7 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
Low level call in Timelock.executeTransaction(address,uint256,string,bytes,uint256) (#1306-1333):
- (success,returnData) = target.call{value: value}(callData) (#1327)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
Variable Timelock.admin_initialized (#1237) is not in mixedCase
Follow the Solidity naming convention.
Additional information: link
Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#1074) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#1075)
Prevent variables from having similar names.
Additional information: link
Sombra.slitherConstructorConstantVariables() (#407-997) uses literals with too many digits:
- TOTAL_SUPPLY = 100000000 * 10 ** DECIMALS (#422)
Use: Ether suffix, Time suffix, or The scientific notation
Additional information: link
executeTransaction(address,uint256,string,bytes,uint256) should be declared external:
- Timelock.executeTransaction(address,uint256,string,bytes,uint256) (#1306-1333)
Use the external attribute for functions never called from the contract.
Additional information: link
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
Token has relatively low CoinGecko rank
Token has relatively low CoinMarketCap rank
Twitter account link seems to be invalid
Unable to find Youtube account