// Contract: EZY
// Target function: function approve(address _spender, uint256 _value) public
pragma solidity ^0.6.0;

/**
 * Math operations with safety checks
 */
 
 contract SafeMath {
  function safeMul(uint256 a, uint256 b)  pure internal returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeDiv(uint256 a, uint256 b) pure internal returns (uint256) {
    assert(b > 0);
    uint256 c = a / b;
    assert(a == b * c + a % b);
    return c;
  }

  function safeSub(uint256 a, uint256 b) pure internal returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function safeAdd(uint256 a, uint256 b) pure internal returns (uint256) {
    uint256 c = a + b;
    assert(c>=a && c>=b);
    return c;
  }

  function assert(bool assertion) pure internal {
    if (!assertion) {
      revert();
    }
  }
}

// EZY TOKEN

contract EZY is SafeMath{
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;
	address payable public owner;

    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /* This notifies clients about the amount burnt */
    event Burn(address indexed from, uint256 value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    constructor() public {
        balanceOf[msg.sender] = 560000000000000000;              // Give the creator all initial tokens
        totalSupply = 560000000000000000;                        // Update total supply
        name = 'EZYSTAYZ TOKEN';                                   // Set the name for display purposes
        symbol = "EZY";                               // Set the symbol for display purposes
        decimals = 8;                            // Amount of decimals for display purposes
		owner = msg.sender;
    }

    /* Send coins */
    function transfer(address _to, uint256 _value) public {
        if (_to == address(0)) revert();                               // Prevent transfer to 0x0 address. Use burn() instead
		if (_value <= 0) revert(); 
        if (balanceOf[msg.sender] < _value) revert();           // Check if the sender has enough
        if (balanceOf[_to] + _value < balanceOf[_to]) revert(); // Check for overflows
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);                     // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                            // Add the same to the recipient
        emit Transfer(msg.sender, _to, _value);                   // Notify anyone listening that this transfer took place
    }