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FCC [Featured Community Collection] Token

About FCC

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Token 4 years

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Laser Scorebeta Last Audit: 2 May 2022

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Token seems to be anonymous. As long as we are unable to find website score is limited.


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

Reentrancy in ERC721Standard._safeMint(address,string,address[],uint256[]) (#1530-1555):
External calls:
- super._safeMint(_to,currentTokenId) (#1549)
- IERC721Receiver(to).onERC721Received(_msgSender(),from,tokenId,_data) (#814-825)
State variables written after the call(s):
- currentTokenId ++ (#1554)
Apply the check-effects-interactions pattern.

Additional information: link

ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) ignores return value by IERC721Receiver(to).onERC721Received(_msgSender(),from,tokenId,_data) (#814-825)
Ensure that all the return values of the function calls are used.

Additional information: link

ERC721Standard.constructor(string,string)._name (#1452) shadows:
- ERC721._name (#494) (state variable)
ERC721Standard.constructor(string,string)._symbol (#1453) shadows:
- ERC721._symbol (#497) (state variable)
ERC721Shared.constructor(string,string)._name (#1570) shadows:
- ERC721._name (#494) (state variable)
ERC721Shared.constructor(string,string)._symbol (#1571) shadows:
- ERC721._symbol (#497) (state variable)
Rename the local variables that shadow another component.

Additional information: link

ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) has external calls inside a loop: IERC721Receiver(to).onERC721Received(_msgSender(),from,tokenId,_data) (#814-825)
Favor pull over push strategy for external calls.

Additional information: link

Variable 'ERC721._checkOnERC721Received(address,address,uint256,bytes).retval (#814)' in ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) potentially used before declaration: retval == IERC721Receiver(to).onERC721Received.selector (#815)
Variable 'ERC721._checkOnERC721Received(address,address,uint256,bytes).reason (#816)' in ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) potentially used before declaration: reason.length == 0 (#817)
Variable 'ERC721._checkOnERC721Received(address,address,uint256,bytes).reason (#816)' in ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) potentially used before declaration: revert(uint256,uint256)(32 + reason,mload(uint256)(reason)) (#822)
Move all variable declarations prior to any usage of the variable, and ensure that reaching a variable declaration does not depend on some conditional if it is used unconditionally.

Additional information: link

Reentrancy in ERC721Standard._safeMint(address,string,address[],uint256[]) (#1530-1555):
External calls:
- super._safeMint(_to,currentTokenId) (#1549)
- IERC721Receiver(to).onERC721Received(_msgSender(),from,tokenId,_data) (#814-825)
State variables written after the call(s):
- feeAddresses[currentTokenId] = _feeAddresses (#1552)
- fees[currentTokenId] = _fees (#1553)
- uri[currentTokenId] = _uri (#1551)
Apply the check-effects-interactions pattern.

Additional information: link

Address.isContract(address) (#211-220) uses assembly
- INLINE ASM (#218)
Address._verifyCallResult(bool,bytes,string) (#356-373) uses assembly
- INLINE ASM (#365-368)
ERC721._checkOnERC721Received(address,address,uint256,bytes) (#810-829) uses assembly
- INLINE ASM (#821-823)
Do not use evm assembly.

Additional information: link

ERC721Enumerable._removeTokenFromAllTokensEnumeration(uint256) (#1005-1023) has costly operations inside a loop:
- delete _allTokensIndex[tokenId] (#1021)
ERC721Enumerable._removeTokenFromAllTokensEnumeration(uint256) (#1005-1023) has costly operations inside a loop:
- _allTokens.pop() (#1022)
ERC721Enumerable._removeTokenFromOwnerEnumeration(address,uint256) (#980-998) has costly operations inside a loop:
- delete _ownedTokensIndex[tokenId] (#996)
ERC721Standard._safeMint(address,string,address[],uint256[]) (#1530-1555) has costly operations inside a loop:
- currentTokenId ++ (#1554)
Use a local variable to hold the loop computation result.

Additional information: link

AccessControl._setRoleAdmin(bytes32,bytes32) (#1261-1264) is never used and should be removed
Address._verifyCallResult(bool,bytes,string) (#356-373) is never used and should be removed
Address.functionCall(address,bytes) (#264-266) is never used and should be removed
Address.functionCall(address,bytes,string) (#274-276) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#289-291) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#299-306) is never used and should be removed
Address.functionDelegateCall(address,bytes) (#338-340) is never used and should be removed
Address.functionDelegateCall(address,bytes,string) (#348-354) is never used and should be removed
Address.functionStaticCall(address,bytes) (#314-316) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (#324-330) is never used and should be removed
Address.sendValue(address,uint256) (#238-244) is never used and should be removed
Context._msgData() (#391-394) is never used and should be removed
ERC721._baseURI() (#575-577) is never used and should be removed
Strings.toHexString(uint256) (#431-442) is never used and should be removed
Strings.toString(uint256) (#406-426) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version0.8.3 (#3) allows old versions
solc-0.8.3 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.sendValue(address,uint256) (#238-244):
- (success) = recipient.call{value: amount}() (#242)
Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (#299-306):
- (success,returndata) = target.call{value: value}(data) (#304)
Low level call in Address.functionStaticCall(address,bytes,string) (#324-330):
- (success,returndata) = target.staticcall(data) (#328)
Low level call in Address.functionDelegateCall(address,bytes,string) (#348-354):
- (success,returndata) = target.delegatecall(data) (#352)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Constant Strings.alphabet (#401) is not in UPPER_CASE_WITH_UNDERSCORES
Parameter ERC721.safeTransferFrom(address,address,uint256,bytes)._data (#639) is not in mixedCase
Parameter ERC721Standard.mint(address,string,address[],uint256[])._to (#1462) is not in mixedCase
Parameter ERC721Standard.mint(address,string,address[],uint256[])._uri (#1463) is not in mixedCase
Parameter ERC721Standard.mint(address,string,address[],uint256[])._feeAddresses (#1464) is not in mixedCase
Parameter ERC721Standard.mint(address,string,address[],uint256[])._fees (#1465) is not in mixedCase
Parameter ERC721Standard.batchMint(address[],string[],address[][],uint256[][])._to (#1472) is not in mixedCase
Parameter ERC721Standard.batchMint(address[],string[],address[][],uint256[][])._uri (#1473) is not in mixedCase
Parameter ERC721Standard.batchMint(address[],string[],address[][],uint256[][])._feeAddresses (#1474) is not in mixedCase
Parameter ERC721Standard.batchMint(address[],string[],address[][],uint256[][])._fees (#1475) is not in mixedCase
Parameter ERC721Standard.setFeeAddress(uint256,uint256,address)._tokenId (#1486) is not in mixedCase
Parameter ERC721Standard.setFeeAddress(uint256,uint256,address)._addressPosition (#1487) is not in mixedCase
Parameter ERC721Standard.setFeeAddress(uint256,uint256,address)._feeAddress (#1488) is not in mixedCase
Parameter ERC721Standard.tokenURI(uint256)._tokenId (#1498) is not in mixedCase
Parameter ERC721Standard.getFeeAddresses(uint256)._tokenId (#1504) is not in mixedCase
Parameter ERC721Standard.getFees(uint256)._tokenId (#1510) is not in mixedCase
Parameter ERC721Standard.getFeeInfo(uint256)._tokenId (#1516) is not in mixedCase
Parameter ERC721Standard.supportsInterface(bytes4)._interfaceId (#1522) is not in mixedCase
Parameter ERC721Shared.mint(address,string,address[],uint256[])._to (#1576) is not in mixedCase
Parameter ERC721Shared.mint(address,string,address[],uint256[])._uri (#1577) is not in mixedCase
Parameter ERC721Shared.mint(address,string,address[],uint256[])._feeAddresses (#1578) is not in mixedCase
Parameter ERC721Shared.mint(address,string,address[],uint256[])._fees (#1579) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#392)" inContext (#386-395)
Remove redundant statements if they congest code but offer no value.

Additional information: link

name() should be declared external:
- ERC721.name() (#548-550)
symbol() should be declared external:
- ERC721.symbol() (#555-557)
tokenURI(uint256) should be declared external:
- ERC721.tokenURI(uint256) (#562-569)
- ERC721Standard.tokenURI(uint256) (#1497-1501)
approve(address,uint256) should be declared external:
- ERC721.approve(address,uint256) (#582-591)
setApprovalForAll(address,bool) should be declared external:
- ERC721.setApprovalForAll(address,bool) (#605-610)
transferFrom(address,address,uint256) should be declared external:
- ERC721.transferFrom(address,address,uint256) (#622-627)
safeTransferFrom(address,address,uint256) should be declared external:
- ERC721.safeTransferFrom(address,address,uint256) (#632-634)
tokenOfOwnerByIndex(address,uint256) should be declared external:
- ERC721Enumerable.tokenOfOwnerByIndex(address,uint256) (#902-905)
tokenByIndex(uint256) should be declared external:
- ERC721Enumerable.tokenByIndex(uint256) (#917-920)
burn(uint256) should be declared external:
- ERC721Burnable.burn(uint256) (#1038-1042)
grantRole(bytes32,address) should be declared external:
- AccessControl.grantRole(bytes32,address) (#1199-1201)
revokeRole(bytes32,address) should be declared external:
- AccessControl.revokeRole(bytes32,address) (#1212-1214)
renounceRole(bytes32,address) should be declared external:
- AccessControl.renounceRole(bytes32,address) (#1230-1234)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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


Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.


Unable to find Telegram and Twitter accounts


Unable to find website, listings and other project-related information


Token has a considerable age, but we're still unable to find its website


Token has no active CoinGecko listing / rank


Token has no active CoinMarketCap listing / rank


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


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


Young tokens have high risks of price dump / death