audball.sol

pragma solidity ^0.5.0;

contract SafeMath {

    function safeAdd(uint a, uint b) public pure returns (uint c) {
        c = a + b;
        require(c >= a, "Invalid input");
    }

    function safeSub(uint a, uint b) public pure returns (uint c) {
        require(b <= a, "Invalid input");
        c = a - b;
    }

    function safeMul(uint a, uint b) public pure returns (uint c) {
        c = a * b;
        require(a == 0 || c / a == b, "Invalid input");
    }

    function safeDiv(uint a, uint b) public pure returns (uint c) {
        require(b > 0, "Invalid input");
        c = a / b;
    }
}


contract ERC20Interface {

    function totalSupply() public view returns (uint);
    function balanceOf(address tokenOwner) public view returns (uint balance);
    function allowance(address tokenOwner, address spender) public view returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);
    function transferFrom(address from, address to, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed delegate, uint tokens);

}


contract ApproveAndCallFallBack {

    function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}


contract Owned {

    address public owner;
    address public newOwner;

    event OwnershipTransferred(address indexed _from, address indexed _to);

    constructor() public {
        owner = msg.sender;
    }

    modifier onlyOwner {
        require(msg.sender == owner, "You are not the owner");
        _;
    }

    function transferOwnership(address _newOwner) public onlyOwner {
        newOwner = _newOwner;
    }

    function acceptOwnership() public {
        require(msg.sender == newOwner, "You are not the new owner");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
        newOwner = address(0);
    }
}


contract audball is ERC20Interface, Owned, SafeMath {

    string public symbol;
    string public name;
    uint8 public decimals;
    uint _totalSupply;

    mapping(address => uint) balances;
    mapping(address => mapping(address => uint)) allowed;

    constructor () public {
        symbol = "AUDBALL";
        name = "Audball Token";
        decimals = 18;
        _totalSupply = 100000000000000000000;
        balances[0xC2C255932A77F4831566822c1f01d9F735CC152E] = _totalSupply;
        emit Transfer(address(0), 0xC2C255932A77F4831566822c1f01d9F735CC152E, _totalSupply);
    }

    function totalSupply() public view returns (uint) {
        return _totalSupply;
    }

    function balanceOf(address tokenOwner) public view returns (uint) {
        return balances[tokenOwner];
    }

    function transfer(address to, uint tokens) public returns (bool) {
        require(tokens <= balances[msg.sender], "Not enough tokens in supply");
        balances[msg.sender] = safeSub(balances[msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(msg.sender, to, tokens);
        return true;
    }

    function approve(address spender, uint tokens) public returns (bool) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }

    function allowance(address tokenOwner, address spender) public view returns (uint) {
        return allowed[tokenOwner][spender];
    }

    function transferFrom(address from, address to, uint tokens) public returns (bool) {
        require(tokens <= balances[from], "Invalid token amount");
        require(tokens <= allowed[from][msg.sender], "Invalid token amount");
        balances[from] = safeSub(balances[from], tokens);
        allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(from, to, tokens);
        return true;
    }

    function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
        return true;
    }

    function () external payable {
        revert("Fallback function");
    }

    function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
        return ERC20Interface(tokenAddress).transfer(owner, tokens);
    }

}