TCHA [TCHALLA] Token
About TCHA
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T’Challa Token is the governance token of the T’Challa Foundation. It aims to build Wakanda Land Game (Metaverse). The T’Challa Wakanda Game will be a combination of multiple elements of technology, including virtual reality, augmented reality and African virtual Arts where users "live" within a digital universe and perform different task to survive in the Wakanda virtual game land. Tchalla is building first African indigenous launchpad called TCHAPAD.
TCHAPAD is a decentralized platform for launching new projects via token creation and the conduction of initial token offering and IDO . Token creation has been simplified for any start up to create their own token without Writing a single line of Code. This is done by simply following a few steps through our terminal and design your own token and launch in a few minutes. NFT being a big trend in the Crypto space, we will be tapping into this trend by building our own NFT marketplace where users can Mint,buy and sell their Digital art collections.
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Laser Scorebeta Last Audit: 1 December 2021
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Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)
TCHALLA.addLiquidity(uint256,uint256) (#850-863) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#855-862)
Ensure that an arbitrary user cannot withdraw unauthorized funds.
Additional information: link
TCHALLA._transfer(address,address,uint256) (#676-793) uses a weak PRNG: "_bBSLimit = _bBSLimitMin + uint256(keccak256(bytes)(abi.encodePacked(block.timestamp,block.difficulty))) % (_bBSLimitMax - _bBSLimitMin + 1) (#737)"
Do not use block.timestamp, now or blockhash as a source of randomness
Additional information: link
Reentrancy in TCHALLA._transfer(address,address,uint256) (#676-793):
External calls:
- swapTokens(contractTokenBalance) (#705)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#822-828)
- buyBackTokens(_bBSLimit) (#740)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
External calls sending eth:
- swapTokens(contractTokenBalance) (#705)
- recipient.transfer(amount) (#1146)
- buyBackTokens(_bBSLimit) (#740)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#792)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#969)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#885)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#894)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#905)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#915)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#886)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#896)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#906)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#917)
- _tokenTransfer(from,to,amount,takeFee) (#792)
- _rTotal = _rTotal.sub(rFee) (#924)
- _tokenTransfer(from,to,amount,takeFee) (#792)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#971)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#914)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#904)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#895)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#916)
- buyBackTokens(_bBSLimit) (#740)
- inSwapAndLiquify = true (#522)
- inSwapAndLiquify = false (#524)
Apply the check-effects-interactions pattern.
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.
TCHALLA._transfer(address,address,uint256).sellHistory (#692) 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
TCHALLA.addLiquidity(uint256,uint256) (#850-863) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#855-862)
Ensure that all the return values of the function calls are used.
Additional information: link
TCHALLA._approve(address,address,uint256).owner (#668) shadows:
- Ownable.owner() (#167-169) (function)
Rename the local variables that shadow another component.
Additional information: link
TCHALLA.setNumTokensSellToAddToBuyBack(uint256) (#1108-1110) should emit an event for:
- minimumTokensBeforeSwap = _minimumTokensBeforeSwap (#1109)
Emit an event for critical parameter changes.
Additional information: link
TCHALLA.setMarketingAddress(address)._marketingAddress (#1112) lacks a zero-check on :
- marketingAddress = address(_marketingAddress) (#1113)
Check that the address is not zero.
Additional information: link
Reentrancy in TCHALLA.transferFrom(address,address,uint256) (#586-590):
External calls:
- _transfer(sender,recipient,amount) (#587)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#822-828)
External calls sending eth:
- _transfer(sender,recipient,amount) (#587)
- recipient.transfer(amount) (#1146)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#588)
- _allowances[owner][spender] = amount (#672)
Apply the check-effects-interactions pattern.
Additional information: link
Reentrancy in TCHALLA.transferFrom(address,address,uint256) (#586-590):
External calls:
- _transfer(sender,recipient,amount) (#587)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#822-828)
External calls sending eth:
- _transfer(sender,recipient,amount) (#587)
- recipient.transfer(amount) (#1146)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#673)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#588)
Apply the check-effects-interactions pattern.
Additional information: link
TCHALLA._removeOldSellHistories() (#1025-1047) uses timestamp for comparisons
Dangerous comparisons:
- _sellHistories[j].time >= maxStartTimeForHistories (#1031)
Avoid relying on block.timestamp.
Additional information: link
Address._functionCallWithValue(address,bytes,uint256,string) (#134-151) uses assembly
- INLINE ASM (#143-146)
Do not use evm assembly.
Additional information: link
TCHALLA.addLiquidity(uint256,uint256) (#850-863) is never used and should be removed
Remove unused functions.
Additional information: link
TCHALLA._previousLiquidityFee (#463) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
Remove any initialization of state variables via non-constant state variables or function calls. If variables must be set upon contract deployment, locate initialization in the constructor instead.
Additional information: link
solc-0.8.4 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
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#134-151):
- (success,returndata) = target.call{value: weiValue}(data) (#137)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
Variable TCHALLA._isEnabledBuyBackAndBurn (#499) 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.
Additional information: link
Reentrancy in TCHALLA.transferFrom(address,address,uint256) (#586-590):
External calls:
- _transfer(sender,recipient,amount) (#587)
- recipient.transfer(amount) (#1146)
External calls sending eth:
- _transfer(sender,recipient,amount) (#587)
- recipient.transfer(amount) (#1146)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#840-845)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#588)
- _allowances[owner][spender] = amount (#672)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#673)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#588)
Apply the check-effects-interactions pattern.
Additional information: link
Variable TCHALLA._getValues(uint256).rTransferAmount (#930) is too similar to TCHALLA._getValues(uint256).tTransferAmount (#929)
Prevent variables from having similar names.
Additional information: link
TCHALLA.slitherConstructorVariables() (#420-1198) uses literals with too many digits:
- minimumTokensBeforeSwap = 200000 * 1 ** 6 * 10 ** 9 (#482)
Use: Ether suffix, Time suffix, or The scientific notation
Additional information: link
TCHALLA.deadAddress (#425) should be constant
Add the constant attributes to state variables that never change.
Additional information: link
transferForeignToken(address,address) should be declared external:
- TCHALLA.transferForeignToken(address,address) (#1168-1172)
Use the external attribute for functions never called from the contract.
Additional information: link
Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.
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 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
Unable to find code repository for the project
Young tokens have high risks of price dump / death
Young tokens have high risks of scam / price dump / death
Token has no active CoinMarketCap listing / rank
Token has relatively low CoinGecko rank
Price for TCHA
LASER DESK beta
Telegram account link seems to be invalid
Twitter account link seems to be invalid
Unable to find Youtube account
Unable to find Discord account