POLIS Token

Polis._writeCheckpoint(address,uint32,uint256,uint256) (contracts/token/Polis.sol#231-253) uses a dangerous strict equality:
- nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber (contracts/token/Polis.sol#240-241)
Don't use strict equality to determine if an account has enough Ether or tokens.

Additional information: link

Ownable.constructor().msgSender (contracts/token/Ownable.sol#32) lacks a zero-check on :
- _owner = msgSender (contracts/token/Ownable.sol#33)
Check that the address is not zero.

Additional information: link

Polis.delegateBySig(address,uint256,uint256,uint8,bytes32,bytes32) (contracts/token/Polis.sol#88-124) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp <= expiry,POLIS::delegateBySig: signature expired) (contracts/token/Polis.sol#122)
Avoid relying on block.timestamp.

Additional information: link

Polis.getChainId() (contracts/token/Polis.sol#255-261) uses assembly
- INLINE ASM (contracts/token/Polis.sol#257-259)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.6.0<0.8.0', '^0.7.0']
- >=0.6.0<0.8.0 (@openzeppelin/contracts/GSN/Context.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/ERC20Capped.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/utils/Context.sol#3)
- ^0.7.0 (contracts/token/Ownable.sol#3)
- ^0.7.0 (contracts/token/Polis.sol#3)
Use one Solidity version.

Additional information: link

Context._msgData() (@openzeppelin/contracts/utils/Context.sol#20-23) is never used and should be removed
ERC20._beforeTokenTransfer(address,address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#305) 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
ERC20Capped._beforeTokenTransfer(address,address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20Capped.sol#38-44) is never used and should be removed
SafeMath.div(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#135-138) is never used and should be removed
SafeMath.div(uint256,uint256,string) (@openzeppelin/contracts/math/SafeMath.sol#190-193) is never used and should be removed
SafeMath.mod(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#152-155) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (@openzeppelin/contracts/math/SafeMath.sol#210-213) is never used and should be removed
SafeMath.mul(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#116-121) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#24-28) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#60-63) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#70-73) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#45-53) is never used and should be removed
SafeMath.trySub(uint256,uint256) (@openzeppelin/contracts/math/SafeMath.sol#35-38) 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/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/ERC20Capped.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>=0.6.0<0.8.0 (@openzeppelin/contracts/utils/Context.sol#3) is too complex
Pragma version^0.7.0 (contracts/token/Ownable.sol#3) allows old versions
Pragma version^0.7.0 (contracts/token/Polis.sol#3) 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.

Additional information: link

Parameter Ownable.proposeOwner(address)._proposedOwner (contracts/token/Ownable.sol#69) is not in mixedCase
Parameter Polis.mint(address,uint256)._to (contracts/token/Polis.sol#61) is not in mixedCase
Parameter Polis.mint(address,uint256)._amount (contracts/token/Polis.sol#61) is not in mixedCase
Parameter Polis.burn(uint256)._amount (contracts/token/Polis.sol#66) is not in mixedCase
Variable Polis._delegates (contracts/token/Polis.sol#13) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (@openzeppelin/contracts/utils/Context.sol#21)" inContext (@openzeppelin/contracts/utils/Context.sol#15-24)
Remove redundant statements if they congest code but offer no value.

Additional information: link

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)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (@openzeppelin/contracts/token/ERC20/ERC20.sol#115-118)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (@openzeppelin/contracts/token/ERC20/ERC20.sol#123-125)
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)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (contracts/token/Ownable.sol#59-63)
proposeOwner(address) should be declared external:
- Ownable.proposeOwner(address) (contracts/token/Ownable.sol#69-72)
claimOwnership() should be declared external:
- Ownable.claimOwnership() (contracts/token/Ownable.sol#78-83)
mint(address,uint256) should be declared external:
- Polis.mint(address,uint256) (contracts/token/Polis.sol#61-64)
burn(uint256) should be declared external:
- Polis.burn(uint256) (contracts/token/Polis.sol#66-69)
Use the external attribute for functions never called from the contract.

Additional information: link

Contract ownership is semi-renounced (passed to a contract)

Average 30d PancakeSwap liquidity is low.

Token is deployed only at one blockchain

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find token on CoinHunt

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Alexa traffic rank is very low

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