NICK.sol

NICK.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.1.0/contracts/token/ERC20/ERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.1.0/contracts/token/ERC20/ERC20Pausable.sol";

contract NickToken is ERC20, Pausable {
    
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    mapping (address => bool) public pauselist;

    constructor () public ERC20("NICK Token", "NICK") {
        _mint(msg.sender, 1000000 * (10 ** uint256(decimals())));
    }
    
    function mint(address account, uint256 amount) public whenNotPaused returns (bool) {
        _mint(account, amount);
        return true;
    }
    
    function transfer(address _to, uint256 _value) public override whenNotPaused returns (bool) {
        require(_value <= balances[msg.sender], "Insufficient Balance");
        require(pauselist[msg.sender] == false && pauselist[_to] == false, "Address is in the pauselist");

        balances[msg.sender] -= _value;
        balances[_to] += _value;
        emit Transfer(msg.sender, _to, _value);

        return true;
    }
    
     function transferFrom(
        address _from,
        address _to,
        uint256 _value
    ) public override whenNotPaused returns (bool) {
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);
        require(pauselist[_from] == false && pauselist[_to] == false, "Address is in the pauselist");

        balances[_from] -= _value;
        balances[_to] += _value;
        allowed[_from][msg.sender] -= _value;
        emit Transfer(_from, _to, _value);
        return true;
    }

}