CR7V

contract CR7Coin { string public name = "CR7 Coin"; string public symbol = "CR7"; uint8 public decimals = 18; uint256 public totalSupply; mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); constructor(uint256 _initialSupply) { totalSupply = _initialSupply * 10 ** uint256(decimals); balanceOf[msg.sender] = totalSupply; } function transfer(address to, uint256 value) public returns (bool success) { require(to != address(0), "Invalid address"); require(balanceOf[msg.sender] >= value, "Insufficient balance"); balanceOf[msg.sender] -= value; balanceOf[to] += value; emit Transfer(msg.sender, to, value); return true; } function approve(address spender, uint256 value) public returns (bool success) { allowance[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } function transferFrom(address from, address to, uint256 value) public returns (bool success) { require(from != address(0), "Invalid address"); require(balanceOf[from] >= value, "Insufficient balance"); require(allowance[from][msg.sender] >= value, "Allowance exceeded"); balanceOf[from] -= value; balanceOf[to] += value; allowance[from][msg.sender] -= value; emit Transfer(from, to, value); return true; } }