pragma solidity ^0.8.7;

contract omChain is Guarded, TokenRecover, Blacklistable, ERC20, ILToken {
    uint8 private _decimals;

    constructor(
        string memory name,
        string memory symbol,
        uint8 decimals_
    ) TokenRecover() ERC20(name, symbol) {
        _decimals = decimals_;
        _blacklister = msg.sender;
    }

    function decimals() public view override returns (uint8) {
        return _decimals;
    }

    function masterMint(address account, uint256 amount)
        public
        override
        onlyOwner
        returns (bool)
    {
        _mint(account, amount);
        emit TokenMinted(account, amount);
        return true;
    }

    function mintTo(address account, uint256 amount)
        public
        override
        onlyMinter
        nonPaused
        notBlacklisted(account)
        returns (bool)
    {
        _mint(account, amount);
        emit TokenMinted(account, amount);
        return true;
    }

    function burnFrom(address account, uint256 amount)
        public
        override
        nonPaused
        returns (bool)
    {
        uint256 currentAllowance = allowance(account, _msgSender());
        require(
            currentAllowance >= amount,
            "ERC20: burn amount exceeds allowance"
        );
        unchecked {
            _approve(account, _msgSender(), currentAllowance - amount);
        }
        _burn(account, amount);
        emit TokenBurned(account, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount)
        public
        override(ERC20, IERC20)
        nonPaused
        returns (bool)
    {
        require(
            (!isBlacklisted(recipient) && !isBlacklisted(msg.sender)),
            "LToken: receiver or sender blacklisted"
        );
        return ERC20.transfer(recipient, amount);
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override(ERC20, IERC20) nonPaused returns (bool) {
        require(
            (!isBlacklisted(recipient) &&
                !isBlacklisted(msg.sender) &&
                !isBlacklisted(sender)),
            "LToken: receiver or sender blacklisted"
        );
        return ERC20.transferFrom(sender, recipient, amount);
    }
}
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