fUSDT [FEG Wrapped USDT] Token

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

fUSDT.currentSupply() (#906-917) uses a dangerous strict equality:
- rUsdtSupply == 0 || tUsdtSupply == 0 (#907)
Don't use strict equality to determine if an account has enough Ether or tokens.

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.

Reentrancy in fUSDT.withdraw(uint256) (#794-812):
External calls:
- _pushUnderlying(USDT,msg.sender,net) (#810)
- xfer = IERC20(erc20).transfer(to,amount) (#818)
Event emitted after the call(s):
- Withdrawal(msg.sender,net) (#811)
Reentrancy in fUSDT.deposit(uint256) (#767-783):
External calls:
- _pullUnderlying(USDT,msg.sender,_amount) (#769)
- xfer = IERC20(erc20).transferFrom(from,address(this),amount) (#789)
Event emitted after the call(s):
- Deposit(msg.sender,_amount) (#782)
Apply the check-effects-interactions pattern.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#494-515) uses assembly
- INLINE ASM (#507-510)
Address.isContract(address) (#400-409) uses assembly
- INLINE ASM (#407)
Do not use evm assembly.

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SafeMath.mul(uint256,uint256) (#577-589) is never used and should be removed
SafeMath.sub(uint256,uint256) (#546-548) is never used and should be removed
EnumerableSet.length(EnumerableSet.Bytes32Set) (#148-150) is never used and should be removed
EnumerableSet.at(EnumerableSet.Bytes32Set,uint256) (#162-164) is never used and should be removed
Address.sendValue(address,uint256) (#428-434) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#479-481) is never used and should be removed
SafeMath.add(uint256,uint256) (#529-534) is never used and should be removed
EnumerableSet.remove(EnumerableSet.UintSet,uint256) (#243-245) is never used and should be removed
EnumerableSet.contains(EnumerableSet.Bytes32Set,bytes32) (#141-143) is never used and should be removed
SafeMath.sub(uint256,uint256,string) (#560-565) is never used and should be removed
SafeMath.ceil(uint256,uint256) (#660-662) is never used and should be removed
EnumerableSet.contains(EnumerableSet.UintSet,uint256) (#250-252) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#655-658) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#489-492) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#619-625) is never used and should be removed
EnumerableSet.add(EnumerableSet.Bytes32Set,bytes32) (#124-126) is never used and should be removed
SafeMath.mod(uint256,uint256) (#639-641) is never used and should be removed
SafeMath.div(uint256,uint256) (#603-605) is never used and should be removed
EnumerableSet.length(EnumerableSet.UintSet) (#257-259) is never used and should be removed
Address._functionCallWithValue(address,bytes,uint256,string) (#494-515) is never used and should be removed
EnumerableSet.at(EnumerableSet.UintSet,uint256) (#271-273) is never used and should be removed
Address.isContract(address) (#400-409) is never used and should be removed
Address.functionCall(address,bytes,string) (#464-466) is never used and should be removed
EnumerableSet.add(EnumerableSet.UintSet,uint256) (#233-235) is never used and should be removed
EnumerableSet.remove(EnumerableSet.Bytes32Set,bytes32) (#134-136) is never used and should be removed
Address.functionCall(address,bytes) (#454-456) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.1 (#4) allows old versions
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.

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Low level call in Address.sendValue(address,uint256) (#428-434):
- (success) = recipient.call{value: amount}() (#432)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#494-515):
- (success,returndata) = target.call{value: weiValue}(data) (#498)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Parameter fUSDT.deposit(uint256)._amount (#767) is not in mixedCase
Parameter fUSDT.withdraw(uint256)._amount (#794) is not in mixedCase
Variable fUSDT.USDT (#686) is not in mixedCase
Function fUSDT.ClaimOPfee() (#758-765) is not in mixedCase
Contract fUSDT (#665-925) is not in CapWords
Follow the Solidity naming convention.

Additional information: link

Variable fUSDT.rUsdtBalance (#670) is too similar to fUSDT.tUsdtBalance (#671)
Variable fUSDT.rUsdtSupply (#677) is too similar to fUSDT.tUsdtSupply (#676)
Prevent variables from having similar names.

Additional information: link

fUSDT.currentSupply() (#906-917) uses literals with too many digits:
- (1000000000,1) (#907)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

fUSDT._symbol (#681) should be constant
fUSDT._decimals (#682) should be constant
fUSDT._name (#680) should be constant
fUSDT.USDT (#686) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

Reentrancy in fUSDT.ClaimOPfee() (#758-765):
External calls:
- _pushUnderlying(USDT,op,transferToAmount) (#761)
- xfer = IERC20(erc20).transfer(to,amount) (#818)
State variables written after the call(s):
- tUsdtSupply -= transferToAmount (#762)
Apply the check-effects-interactions pattern.

Additional information: link

fUSDT.constructor() (#691-696) ignores return value by EnumerableSet.add(excluded,address(0)) (#694)
fUSDT.excludeFromFees(address) (#830-838) ignores return value by EnumerableSet.add(excluded,account) (#837)
fUSDT.includeInFees(address) (#840-845) ignores return value by EnumerableSet.remove(excluded,account) (#844)
Ensure that all the return values of the function calls are used.

Additional information: link

fUSDT.rUsdtToEveryone(uint256) (#822-828) should emit an event for:
- rUsdtSupply -= ((amt * r) / t) (#826)
- feesAccrued += amt (#827)
Emit an event for critical parameter changes.

Additional information: link

fUSDT.setOp(address,address).opper (#919) lacks a zero-check on :
- op = opper (#921)
fUSDT.setOp(address,address).opper2 (#919) lacks a zero-check on :
- op2 = opper2 (#922)
Check that the address is not zero.

Additional information: link

Reentrancy in fUSDT.deposit(uint256) (#767-783):
External calls:
- _pullUnderlying(USDT,msg.sender,_amount) (#769)
- xfer = IERC20(erc20).transferFrom(from,address(this),amount) (#789)
State variables written after the call(s):
- feesAccrued += df (#778)
- rUsdtBalance[op] += ((df * r) / t) (#779)
- rUsdtBalance[msg.sender] += ((net * r) / t) (#781)
- rUsdtSupply += (((net + df) * r) / t) (#780)
- tUsdtBalance[msg.sender] += (_amount - fee) (#776)
- tUsdtSupply += _amount (#774)
Apply the check-effects-interactions pattern.

Additional information: link

fUSDT.deposit(uint256) (#767-783) performs a multiplication on the result of a division:
-df = fee / 10 (#772)
-rUsdtBalance[op] += ((df * r) / t) (#779)
fUSDT._transfer(address,address,uint256) (#877-904) performs a multiplication on the result of a division:
-fee = amt / 100 (#882)
-rUsdtSupply -= ((fee * r) / t) (#901)
SafeMath.ceil(uint256,uint256) (#660-662) performs a multiplication on the result of a division:
-(a + m - 1) / m * m (#661)
fUSDT.withdraw(uint256) (#794-812) performs a multiplication on the result of a division:
-wf = fee / 10 (#798)
-rUsdtBalance[op] += ((wf * r) / t) (#808)
Consider ordering multiplication before division.

Additional information: link

withdraw(uint256) should be declared external:
- fUSDT.withdraw(uint256) (#794-812)
transfer(address,uint256) should be declared external:
- fUSDT.transfer(address,uint256) (#720-723)
increaseAllowance(address,uint256) should be declared external:
- fUSDT.increaseAllowance(address,uint256) (#740-743)
totalFees() should be declared external:
- fUSDT.totalFees() (#754-756)
decimals() should be declared external:
- fUSDT.decimals() (#706-708)
symbol() should be declared external:
- fUSDT.symbol() (#702-704)
decreaseAllowance(address,uint256) should be declared external:
- fUSDT.decreaseAllowance(address,uint256) (#745-748)
deposit(uint256) should be declared external:
- fUSDT.deposit(uint256) (#767-783)
transferFrom(address,address,uint256) should be declared external:
- fUSDT.transferFrom(address,address,uint256) (#734-738)
allowance(address,address) should be declared external:
- fUSDT.allowance(address,address) (#725-727)
rUsdtToEveryone(uint256) should be declared external:
- fUSDT.rUsdtToEveryone(uint256) (#822-828)
approve(address,uint256) should be declared external:
- fUSDT.approve(address,uint256) (#729-732)
name() should be declared external:
- fUSDT.name() (#698-700)
ClaimOPfee() should be declared external:
- fUSDT.ClaimOPfee() (#758-765)
Use the external attribute for functions never called from the contract.

Additional information: link

Token seems to be untradeable: there is no PancakeSwap trading pair and no trading volumes. Ignore for presale.

Token was delisted (assigned to inactive / untracked listing) from CoinMarketCap

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BscScan page for the token does not contain additional info: website, socials, description, etc.

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Unable to find token on CoinGecko

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Unable to find token contract audit

Unable to verify token contract address on the website

Token is not listed at Mobula.Finance

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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

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Unable to find token/project description on the website or on BscScan, CoinHunt, CoinGecko, CoinMarketCap

Unable to find code repository for the project

Token has no active CoinGecko listing / rank

Token has a considerable age, but social accounts / website are missing or have few users

Token has no active CoinMarketCap listing / rank

Token has a considerable age, but average PancakeSwap 30d trading volume is low