//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.8;
import 'https://github.com/freitasgouvea/token-erc-20/blob/master/contracts/interfaces/IERC20.sol';
import 'https://github.com/freitasgouvea/token-erc-20/blob/master/contracts/libraries/SafeMath.sol';
import "https://github.com/freitasgouvea/token-erc-20/blob/master/contracts/ownership/Ownable.sol";
import "https://github.com/freitasgouvea/token-erc-20/blob/master/contracts/lifecycle/Pausable.sol";
contract ERC20 is IERC20, Ownable, Pausable {
using SafeMath for uint;
string internal _name;
string internal _symbol;
uint8 internal _decimals;
uint256 internal _totalSupply;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowed;
event Mint(address indexed minter, address indexed account, uint256 amount);
event Burn(address indexed burner, address indexed account, uint256 amount);
constructor (
string memory name,
string memory symbol,
uint8 decimals,
uint256 totalSupply
) public
{
_symbol = symbol;
_name = name;
_decimals = decimals;
_totalSupply = totalSupply;
_balances[msg.sender] = totalSupply;
}
function name() public view returns (string memory)
{
return _name;
}
function symbol() public view returns (string memory)
{
return _symbol;
}
function decimals() public view returns (uint8)
{
return _decimals;
}
function totalSupply() public view returns (uint256)
{
return _totalSupply;
}
function transfer(address _to,uint256 _value ) public override whenNotPaused returns (bool)
{
require(_to != address(0), 'ERC20: to address is not valid');
require(_value <= _balances[msg.sender], 'ERC20: insufficient balance');
_balances[msg.sender] = SafeMath.sub(_balances[msg.sender], _value);
_balances[_to] = SafeMath.add(_balances[_to], _value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public override view returns (uint256 )
{
return _balances[_owner];
}
function approve(address _spender, uint256 _value) public override whenNotPaused returns (bool)
{
_allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom( address _from, address _to, uint256 _value) public override whenNotPaused returns (bool)
{
require(_from != address(0), 'ERC20: from address is not valid');
require(_to != address(0), 'ERC20: to address is not valid');
require(_value <= _balances[_from], 'ERC20: insufficient balance');
require(_value <= _allowed[_from][msg.sender], 'ERC20: from not allowed');
_balances[_from] = SafeMath.sub(_balances[_from], _value);
_balances[_to] = SafeMath.add(_balances[_to], _value);
_allowed[_from][msg.sender] = SafeMath.sub(_allowed[_from][msg.sender], _value);
emit Transfer(_from, _to, _value);
return true;
}
function allowance(address _owner,address _spender) public override view whenNotPaused returns (uint256)
{
return _allowed[_owner][_spender];
}
function increaseApproval( address _spender, uint _addedValue) public whenNotPaused returns (bool)
{
_allowed[msg.sender][_spender] = SafeMath.add(_allowed[msg.sender][_spender], _addedValue);
emit Approval(msg.sender, _spender, _allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval( address _spender, uint _subtractedValue) public whenNotPaused returns (bool)
{
uint oldValue = _allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
_allowed[msg.sender][_spender] = 0;
} else {
_allowed[msg.sender][_spender] = SafeMath.sub(oldValue, _subtractedValue);
}
emit Approval(msg.sender, _spender, _allowed[msg.sender][_spender]);
return true;
}
function mintTo(
address _to,
uint _amount
) public
whenNotPaused
onlyOwner
{
require(_to != address(0), 'ERC20: to address is not valid');
require(_amount > 0, 'ERC20: amount is not valid');
_totalSupply = _totalSupply.add(_amount);
_balances[_to] = _balances[_to].add(_amount);
emit Mint(msg.sender, _to, _amount);
}
function burnFrom(
address _from,
uint _amount
) public
whenNotPaused
onlyOwner
{
require(_from != address(0), 'ERC20: from address is not valid');
require(_balances[_from] >= _amount, 'ERC20: insufficient balance');
_balances[_from] = _balances[_from].sub(_amount);
_totalSupply = _totalSupply.sub(_amount);
emit Burn(msg.sender, _from, _amount);
}
function getadress() view public returns(address) {
return address(this);
}
function getBalance() public view returns(uint256){
return msg.sender.balance;
}
}
![111|270x168]
