BTT [BitTorrent] Token

Contract locking ether found:
Contract BTT (#1615-1650) has payable functions:
- NativeMetaTransaction.executeMetaTransaction(address,bytes,bytes32,bytes32,uint8) (#770-804)
But does not have a function to withdraw the ether
Remove the payable attribute or add a withdraw function.

Additional information: link

Redundant expression "this (#23)" inContext (#17-26)
Remove redundant statements if they congest code but offer no value.

Additional information: link

EIP712Base.getChainId() (#712-718) uses assembly
- INLINE ASM (#714-716)
ContextMixin.msgSender() (#850-869) uses assembly
- INLINE ASM (#858-864)
Address.isContract(address) (#1199-1208) uses assembly
- INLINE ASM (#1206)
Address._verifyCallResult(bool,bytes,string) (#1344-1361) uses assembly
- INLINE ASM (#1353-1356)
Do not use evm assembly.

Additional information: link

Different versions of Solidity are used:
- Version used: ['0.6.6', '>=0.6.0<0.8.0', '>=0.6.2<0.8.0']
- >=0.6.0<0.8.0 (#5)
- >=0.6.0<0.8.0 (#32)
- >=0.6.0<0.8.0 (#112)
- >=0.6.0<0.8.0 (#329)
- 0.6.6 (#635)
- 0.6.6 (#650)
- 0.6.6 (#664)
- 0.6.6 (#741)
- 0.6.6 (#847)
- >=0.6.0<0.8.0 (#876)
- >=0.6.2<0.8.0 (#1176)
- >=0.6.0<0.8.0 (#1368)
- 0.6.6 (#1585)
- 0.6.6 (#1608)
Use one Solidity version.

Additional information: link

Pragma version0.6.6 (#635) allows old versions
solc-0.6.6 is not recommended for deployment
Pragma version>=0.6.0<0.8.0 (#5) is too complex
Pragma version0.6.6 (#847) allows old versions
Pragma version>=0.6.0<0.8.0 (#1368) is too complex
Pragma version0.6.6 (#650) allows old versions
Pragma version>=0.6.0<0.8.0 (#112) is too complex
Pragma version>=0.6.2<0.8.0 (#1176) is too complex
Pragma version>=0.6.0<0.8.0 (#32) is too complex
Pragma version0.6.6 (#741) allows old versions
Pragma version0.6.6 (#664) allows old versions
Pragma version>=0.6.0<0.8.0 (#876) is too complex
Pragma version0.6.6 (#1585) allows old versions
Pragma version0.6.6 (#1608) allows old versions
Pragma version>=0.6.0<0.8.0 (#329) is too complex
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

SafeMath.mul(uint256,uint256) (#225-230) is never used and should be removed
SafeMath.sub(uint256,uint256) (#210-213) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (#169-172) is never used and should be removed
AccessControl._setRoleAdmin(bytes32,bytes32) (#1565-1568) is never used and should be removed
EnumerableSet.length(EnumerableSet.Bytes32Set) (#1044-1046) is never used and should be removed
EnumerableSet.at(EnumerableSet.Bytes32Set,uint256) (#1058-1060) is never used and should be removed
Address.sendValue(address,uint256) (#1226-1232) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#1277-1279) is never used and should be removed
EnumerableSet.remove(EnumerableSet.UintSet,uint256) (#1139-1141) is never used and should be removed
EnumerableSet.contains(EnumerableSet.Bytes32Set,bytes32) (#1037-1039) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#179-182) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (#1336-1342) is never used and should be removed
Context._msgSender() (#18-20) is never used and should be removed
Address.functionDelegateCall(address,bytes) (#1326-1328) is never used and should be removed
EnumerableSet.contains(EnumerableSet.UintSet,uint256) (#1146-1148) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#133-137) is never used and should be removed
ERC20._burn(address,uint256) (#574-582) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#319-322) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#1287-1294) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#299-302) is never used and should be removed
EnumerableSet.add(EnumerableSet.Bytes32Set,bytes32) (#1020-1022) is never used and should be removed
ERC20._setupDecimals(uint8) (#612-614) is never used and should be removed
Context._msgData() (#22-25) is never used and should be removed
Address.functionStaticCall(address,bytes) (#1302-1304) is never used and should be removed
SafeMath.mod(uint256,uint256) (#261-264) is never used and should be removed
SafeMath.div(uint256,uint256) (#244-247) is never used and should be removed
Address._verifyCallResult(bool,bytes,string) (#1344-1361) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#154-162) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#144-147) is never used and should be removed
EnumerableSet.length(EnumerableSet.UintSet) (#1153-1155) is never used and should be removed
EnumerableSet.at(EnumerableSet.UintSet,uint256) (#1167-1169) is never used and should be removed
Address.isContract(address) (#1199-1208) is never used and should be removed
Address.functionCall(address,bytes,string) (#1262-1264) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (#1312-1318) is never used and should be removed
EnumerableSet.add(EnumerableSet.UintSet,uint256) (#1129-1131) is never used and should be removed
EnumerableSet.remove(EnumerableSet.Bytes32Set,bytes32) (#1030-1032) is never used and should be removed
Address.functionCall(address,bytes) (#1252-1254) is never used and should be removed
Remove unused functions.

Additional information: link

Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (#1287-1294):
- (success,returndata) = target.call{value: value}(data) (#1292)
Low level call in Address.functionStaticCall(address,bytes,string) (#1312-1318):
- (success,returndata) = target.staticcall(data) (#1316)
Low level call in NativeMetaTransaction.executeMetaTransaction(address,bytes,bytes32,bytes32,uint8) (#770-804):
- (success,returnData) = address(this).call(abi.encodePacked(functionSignature,userAddress)) (#798-800)
Low level call in Address.sendValue(address,uint256) (#1226-1232):
- (success) = recipient.call{value: amount}() (#1230)
Low level call in Address.functionDelegateCall(address,bytes,string) (#1336-1342):
- (success,returndata) = target.delegatecall(data) (#1340)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#477-481)
decimals() should be declared external:
- ERC20.decimals() (#414-416)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#514-517)
symbol() should be declared external:
- ERC20.symbol() (#397-399)
balanceOf(address) should be declared external:
- ERC20.balanceOf(address) (#428-430)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#440-443)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#495-498)
getNonce(address) should be declared external:
- NativeMetaTransaction.getNonce(address) (#822-824)
getRoleMemberCount(bytes32) should be declared external:
- AccessControl.getRoleMemberCount(bytes32) (#1459-1461)
name() should be declared external:
- ERC20.name() (#389-391)
grantRole(bytes32,address) should be declared external:
- AccessControl.grantRole(bytes32,address) (#1499-1503)
getRoleMember(bytes32,uint256) should be declared external:
- AccessControl.getRoleMember(bytes32,uint256) (#1475-1477)
revokeRole(bytes32,address) should be declared external:
- AccessControl.revokeRole(bytes32,address) (#1514-1518)
totalSupply() should be declared external:
- ERC20.totalSupply() (#421-423)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#459-462)
renounceRole(bytes32,address) should be declared external:
- AccessControl.renounceRole(bytes32,address) (#1534-1538)
executeMetaTransaction(address,bytes,bytes32,bytes32,uint8) should be declared external:
- NativeMetaTransaction.executeMetaTransaction(address,bytes,bytes32,bytes32,uint8) (#770-804)
getRoleAdmin(bytes32) should be declared external:
- AccessControl.getRoleAdmin(bytes32) (#1485-1487)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#448-450)
Use the external attribute for functions never called from the contract.

Additional information: link

Unable to find audit link on the website

Token is not listed at Mobula.Finance

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