Nerve Finance is a stableswap AMM built on Binance Smart Chain designed to allow trading stablecoins and pegged synthetic assets quickly with minimal slippage and low fees. $NRV is the governance token of the Nerve Finance protocol.
Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)
NerveToken._writeCheckpoint(address,uint32,uint256,uint256) (contracts/NerveToken/NerveToken.sol#226-244) uses a dangerous strict equality:
- nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber (contracts/NerveToken/NerveToken.sol#236)
Don't use strict equality to determine if an account has enough Ether or tokens.
Additional information: link
NerveToken.delegateBySig(address,uint256,uint256,uint8,bytes32,bytes32) (contracts/NerveToken/NerveToken.sol#92-133) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now <= expiry,NRV::delegateBySig: signature expired) (contracts/NerveToken/NerveToken.sol#131)
Avoid relying on block.timestamp.
Additional information: link
Address.isContract(address) (@openzeppelin/contracts/utils/Address.sol#26-35) uses assembly
- INLINE ASM (@openzeppelin/contracts/utils/Address.sol#33)
Address._verifyCallResult(bool,bytes,string) (@openzeppelin/contracts/utils/Address.sol#147-164) uses assembly
- INLINE ASM (@openzeppelin/contracts/utils/Address.sol#156-159)
NerveToken.getChainId() (contracts/NerveToken/NerveToken.sol#251-255) uses assembly
- INLINE ASM (contracts/NerveToken/NerveToken.sol#253)
Do not use evm assembly.
Additional information: link
Different versions of Solidity is used:
- Version used: ['0.6.12', '>=0.6.0<0.8.0', '>=0.6.2<0.8.0']
- >=0.6.0<0.8.0 (@openzeppelin/contracts/GSN/Context.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/access/AccessControl.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/access/Ownable.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/math/SafeMath.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/ERC20.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#3)
- >=0.6.2<0.8.0 (@openzeppelin/contracts/utils/Address.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/utils/EnumerableSet.sol#3)
- 0.6.12 (contracts/NerveToken/NerveToken.sol#3)
Use one Solidity version.
Additional information: link
AccessControl._setRoleAdmin(bytes32,bytes32) (@openzeppelin/contracts/access/AccessControl.sol#201-204) is never used and should be removed
Address._verifyCallResult(bool,bytes,string) (@openzeppelin/contracts/utils/Address.sol#147-164) is never used and should be removed
Address.functionCall(address,bytes) (@openzeppelin/contracts/utils/Address.sol#79-81) is never used and should be removed
Address.functionCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#89-91) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (@openzeppelin/contracts/utils/Address.sol#104-106) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (@openzeppelin/contracts/utils/Address.sol#114-121) is never used and should be removed
Address.functionStaticCall(address,bytes) (@openzeppelin/contracts/utils/Address.sol#129-131) is never used and should be removed
Address.functionStaticCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#139-145) is never used and should be removed
Address.isContract(address) (@openzeppelin/contracts/utils/Address.sol#26-35) is never used and should be removed
Address.sendValue(address,uint256) (@openzeppelin/contracts/utils/Address.sol#53-59) is never used and should be removed
Context._msgData() (@openzeppelin/contracts/GSN/Context.sol#20-23) is never used and should be removed
ERC20._setupDecimals(uint8) (@openzeppelin/contracts/token/ERC20/ERC20.sol#287-289) is never used and should be removed
EnumerableSet.add(EnumerableSet.Bytes32Set,bytes32) (@openzeppelin/contracts/utils/EnumerableSet.sol#147-149) is never used and should be removed
EnumerableSet.add(EnumerableSet.UintSet,uint256) (@openzeppelin/contracts/utils/EnumerableSet.sol#256-258) is never used and should be removed
EnumerableSet.at(EnumerableSet.Bytes32Set,uint256) (@openzeppelin/contracts/utils/EnumerableSet.sol#185-187) is never used and should be removed
EnumerableSet.at(EnumerableSet.UintSet,uint256) (@openzeppelin/contracts/utils/EnumerableSet.sol#294-296) is never used and should be removed
EnumerableSet.contains(EnumerableSet.Bytes32Set,bytes32) (@openzeppelin/contracts/utils/EnumerableSet.sol#164-166) is never used and should be removed
EnumerableSet.contains(EnumerableSet.UintSet,uint256) (@openzeppelin/contracts/utils/EnumerableSet.sol#273-275) is never used and should be removed
EnumerableSet.length(EnumerableSet.Bytes32Set) (@openzeppelin/contracts/utils/EnumerableSet.sol#171-173) is never used and should be removed
EnumerableSet.length(EnumerableSet.UintSet) (@openzeppelin/contracts/utils/EnumerableSet.sol#280-282) is never used and should be removed
EnumerableSet.remove(EnumerableSet.Bytes32Set,bytes32) (@openzeppelin/contracts/utils/EnumerableSet.sol#157-159) is never used and should be removed
EnumerableSet.remove(EnumerableSet.UintSet,uint256) (@openzeppelin/contracts/utils/EnumerableSet.sol#266-268) is never used and should be removed
SafeMath.div(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#103-105) is never used and should be removed
SafeMath.div(uint256,uint256,string) (@openzeppelin/contracts/math/SafeMath.sol#119-125) is never used and should be removed
SafeMath.mod(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#139-141) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (@openzeppelin/contracts/math/SafeMath.sol#155-158) is never used and should be removed
SafeMath.mul(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#77-89) is never used and should be removed
Remove unused functions.
Additional information: link
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/GSN/Context.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/access/AccessControl.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/access/Ownable.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/math/SafeMath.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/ERC20.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#3) is too complex
Pragma version>=0.6.2<0.8.0 (@openzeppelin/contracts/utils/Address.sol#3) is too complex
Pragma version>=0.6.0<0.8.0 (@openzeppelin/contracts/utils/EnumerableSet.sol#3) 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
Low level call in Address.sendValue(address,uint256) (@openzeppelin/contracts/utils/Address.sol#53-59):
- (success) = recipient.call{value: amount}() (@openzeppelin/contracts/utils/Address.sol#57)
Low level call in Address.functionCallWithValue(address,bytes,uint256,string) (@openzeppelin/contracts/utils/Address.sol#114-121):
- (success,returndata) = target.call{value: value}(data) (@openzeppelin/contracts/utils/Address.sol#119)
Low level call in Address.functionStaticCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#139-145):
- (success,returndata) = target.staticcall(data) (@openzeppelin/contracts/utils/Address.sol#143)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
Parameter NerveToken.mint(address,uint256)._to (contracts/NerveToken/NerveToken.sol#20) is not in mixedCase
Parameter NerveToken.mint(address,uint256)._amount (contracts/NerveToken/NerveToken.sol#20) is not in mixedCase
Variable NerveToken._delegates (contracts/NerveToken/NerveToken.sol#34) is not in mixedCase
Follow the Solidity naming convention.
Additional information: link
Redundant expression "this (@openzeppelin/contracts/GSN/Context.sol#21)" inContext (@openzeppelin/contracts/GSN/Context.sol#15-24)
Remove redundant statements if they congest code but offer no value.
Additional information: link
getRoleMemberCount(bytes32) should be declared external:
- AccessControl.getRoleMemberCount(bytes32) (@openzeppelin/contracts/access/AccessControl.sol#95-97)
getRoleMember(bytes32,uint256) should be declared external:
- AccessControl.getRoleMember(bytes32,uint256) (@openzeppelin/contracts/access/AccessControl.sol#111-113)
getRoleAdmin(bytes32) should be declared external:
- AccessControl.getRoleAdmin(bytes32) (@openzeppelin/contracts/access/AccessControl.sol#121-123)
grantRole(bytes32,address) should be declared external:
- AccessControl.grantRole(bytes32,address) (@openzeppelin/contracts/access/AccessControl.sol#135-139)
revokeRole(bytes32,address) should be declared external:
- AccessControl.revokeRole(bytes32,address) (@openzeppelin/contracts/access/AccessControl.sol#150-154)
renounceRole(bytes32,address) should be declared external:
- AccessControl.renounceRole(bytes32,address) (@openzeppelin/contracts/access/AccessControl.sol#170-174)
owner() should be declared external:
- Ownable.owner() (@openzeppelin/contracts/access/Ownable.sol#35-37)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (@openzeppelin/contracts/access/Ownable.sol#54-57)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (@openzeppelin/contracts/access/Ownable.sol#63-67)
symbol() should be declared external:
- ERC20.symbol() (@openzeppelin/contracts/token/ERC20/ERC20.sol#72-74)
decimals() should be declared external:
- ERC20.decimals() (@openzeppelin/contracts/token/ERC20/ERC20.sol#89-91)
totalSupply() should be declared external:
- ERC20.totalSupply() (@openzeppelin/contracts/token/ERC20/ERC20.sol#96-98)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#115-118)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#134-137)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#152-156)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#170-173)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#189-192)
burn(uint256) should be declared external:
- ERC20Burnable.burn(uint256) (@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol#21-23)
burnFrom(address,uint256) should be declared external:
- ERC20Burnable.burnFrom(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol#36-41)
mint(address,uint256) should be declared external:
- NerveToken.mint(address,uint256) (contracts/NerveToken/NerveToken.sol#20-25)
Use the external attribute for functions never called from the contract.
Additional information: link
Unable to find token contract audit
Unable to find audit link on the website
Unable to find whitepaper 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 scam / price dump / death
Young tokens have high risks of scam / price dump / death
Token has a considerable age, but social accounts / website are missing or have few users
Twitter account seems to be suspended
Additional information: link
Unable to find Youtube account