pragma solidity ^0.5.0; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; require(c >= a); } function sub(uint256 a, uint256 b) internal pure returns (uint256 c) { require(b <= a); c = a - b; } function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a * b; require(a == 0 || c / a == b); } function div(uint256 a, uint256 b) internal pure returns (uint256 c) { require(b > 0); c = a / b; } } contract ERC20Interface { function totalSupply() public view returns (uint256); function balanceOf(address tokenOwner) public view returns (uint256 balance); function allowance(address tokenOwner, address spender) public view returns (uint256 remaining); function transfer(address to, uint256 value) public returns (bool success); function approve(address spender, uint256 value) public returns (bool success); function transferFrom(address from, address to, uint256 value) public returns (bool success); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed tokenOwner, address indexed spender, uint256 value); } contract CREDIT is ERC20Interface { using SafeMath for uint256; string public symbol; string public name; uint8 public decimals; uint256 _totalSupply; address public owner; bool public activeStatus = true; event Active(address msgSender); event Reset(address msgSender); event Freeze(address indexed from, uint256 value); event Unfreeze(address indexed from, uint256 value); mapping(address => uint256) public balances; mapping(address => uint256) public freezeOf; mapping(address => mapping(address => uint256)) public allowed; constructor() public { symbol = "CREDIT"; name = "CREDIT"; decimals = 18; _totalSupply = 100000000 * 10**uint(decimals); owner = msg.sender; balances[owner] = _totalSupply; emit Transfer(address(0), owner, _totalSupply); } function isOwner(address add) public view returns (bool) { if (add == owner) { return true; } else return false; } modifier onlyOwner { if (!isOwner(msg.sender)) { revert(); } _; } modifier onlyActive { if (!activeStatus) { revert(); } _; } function activeMode() public onlyOwner { activeStatus = true; emit Active(msg.sender); } function resetMode() public onlyOwner { activeStatus = false; emit Reset(msg.sender); } function totalSupply() public view returns (uint256) { return _totalSupply; } function balanceOf(address tokenOwner) public view returns (uint256 balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint256 remaining) { return allowed[tokenOwner][spender]; } function transfer(address to, uint256 value) public onlyActive returns (bool success) { if (to == address(0)) { revert(); } if (value <= 0) { revert(); } if (balances[msg.sender] < value) { revert(); } balances[msg.sender] = balances[msg.sender].sub(value); balances[to] = balances[to].add(value); emit Transfer(msg.sender, to, value); return true; } function approve(address spender, uint256 value) public onlyActive returns (bool success) { if (value <= 0) { revert(); } allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } function transferFrom(address from, address to, uint256 value) public onlyActive returns (bool success) { if (to == address(0)) { revert(); } if (value <= 0) { revert(); } if (balances[from] < value) { revert(); } if (value > allowed[from][msg.sender]) { revert(); } balances[from] = balances[from].sub(value); allowed[from][msg.sender] = allowed[from][msg.sender].sub(value); balances[to] = balances[to].add(value); emit Transfer(from, to, value); return true; } function freeze(uint256 value) public onlyActive returns (bool success) { if (balances[msg.sender] < value) { revert(); } if (value <= 0){ revert(); } balances[msg.sender] = balances[msg.sender].sub(value); freezeOf[msg.sender] = freezeOf[msg.sender].add(value); emit Freeze(msg.sender, value); return true; } function unfreeze(uint256 value) public onlyActive returns (bool success) { if (freezeOf[msg.sender] < value) { revert(); } if (value <= 0) { revert(); } freezeOf[msg.sender] = freezeOf[msg.sender].sub(value); balances[msg.sender] = balances[msg.sender].add(value); emit Unfreeze(msg.sender, value); return true; } function () external payable { revert(); } }

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