BTCB [Binance-Peg BTCB] Token

SafeMath.mul(uint256,uint256) (#187-199) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#262-265) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#227-234) is never used and should be removed
Context._msgData() (#113-116) is never used and should be removed
SafeMath.mod(uint256,uint256) (#247-249) is never used and should be removed
BEP20Token._burnFrom(address,uint256) (#596-599) is never used and should be removed
SafeMath.div(uint256,uint256) (#212-214) is never used and should be removed
Remove unused functions.

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BEP20Token._approve(address,address,uint256).owner (#582) shadows:
- Ownable.owner() (#297-299) (function)
BEP20Token.allowance(address,address).owner (#419) shadows:
- Ownable.owner() (#297-299) (function)
Rename the local variables that shadow another component.

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Redundant expression "this (#114)" inContext (#104-117)
Remove redundant statements if they congest code but offer no value.

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Variable BEP20Token._name (#349) is not in mixedCase
Variable BEP20Token._symbol (#348) is not in mixedCase
Variable BEP20Token._decimals (#347) is not in mixedCase
Follow the Solidity naming convention.

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BEP20Token.constructor() (#351-359) uses literals with too many digits:
- _totalSupply = 9001000000000000000000 (#355)
Use: Ether suffix, Time suffix, or The scientific notation

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renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#316-319)
burn(uint256) should be declared external:
- BEP20Token.burn(uint256) (#505-508)
increaseAllowance(address,uint256) should be declared external:
- BEP20Token.increaseAllowance(address,uint256) (#465-468)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#325-327)
decreaseAllowance(address,uint256) should be declared external:
- BEP20Token.decreaseAllowance(address,uint256) (#484-487)
mint(uint256) should be declared external:
- BEP20Token.mint(uint256) (#497-500)
Use the external attribute for functions never called from the contract.

Additional information: link

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