// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/**
 * @title SafeMath
 * @dev Math operations with safety checks (optional for Solidity >= 0.8.0)
 */
library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a * b;
        require(a == 0 || c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
}

/**
 * @title ERC20Basic
 */
interface ERC20Basic {
    function totalSupply() external view returns (uint256);
    function balanceOf(address who) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
}

/**
 * @title BasicToken
 */
contract BasicToken is ERC20Basic {
    mapping(address => uint256) internal _balances;
    uint256 internal _totalSupply;

    function transfer(address _to, uint256 _value) external override returns (bool) {
        require(_to != address(0), "ERC20: transfer to the zero address");
        require(_balances[msg.sender] >= _value, "ERC20: insufficient balance");

        _balances[msg.sender] = _balances[msg.sender] - _value;
        _balances[_to] = _balances[_to] + _value;

        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    function balanceOf(address _owner) external view override returns (uint256) {
        return _balances[_owner];
    }

    function totalSupply() external view override virtual returns (uint256) {
        return _totalSupply;
    }
}

/**
 * @title ERC20 interface
 */
interface ERC20 is ERC20Basic {
    function allowance(address owner, address spender) external view returns (uint256);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
    function approve(address spender, uint256 value) external returns (bool);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @title StandardToken
 */
contract StandardToken is ERC20, BasicToken {
    mapping(address => mapping(address => uint256)) private _allowed;

    function totalSupply() external view override(ERC20Basic, BasicToken) returns (uint256) {
        return _totalSupply;
    }

    function allowance(address _owner, address _spender) external view override returns (uint256) {
        return _allowed[_owner][_spender];
    }

    function approve(address _spender, uint256 _value) external override returns (bool) {
        require(_spender != address(0), "ERC20: approve to the zero address");

        _allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function increaseAllowance(address _spender, uint256 _addedValue) external returns (bool) {
        require(_spender != address(0), "ERC20: increaseAllowance to the zero address");

        _allowed[msg.sender][_spender] += _addedValue;
        emit Approval(msg.sender, _spender, _allowed[msg.sender][_spender]);
        return true;
    }

    function decreaseAllowance(address _spender, uint256 _subtractedValue) external returns (bool) {
        require(_spender != address(0), "ERC20: decreaseAllowance to the zero address");

        uint256 currentAllowance = _allowed[msg.sender][_spender];
        require(currentAllowance >= _subtractedValue, "ERC20: decreased allowance below zero");

        _allowed[msg.sender][_spender] = currentAllowance - _subtractedValue;
        emit Approval(msg.sender, _spender, _allowed[msg.sender][_spender]);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) external override returns (bool) {
        require(_from != address(0), "ERC20: transfer from the zero address");
        require(_to != address(0), "ERC20: transfer to the zero address");
        require(_balances[_from] >= _value, "ERC20: transfer amount exceeds balance");
        require(_allowed[_from][msg.sender] >= _value, "ERC20: transfer amount exceeds allowance");

        _balances[_from] = _balances[_from] - _value;
        _balances[_to] = _balances[_to] + _value;
        _allowed[_from][msg.sender] = _allowed[_from][msg.sender] - _value;

        emit Transfer(_from, _to, _value);
        return true;
    }
}

/**
 * @title Indicoin Token
 * @dev ERC-20 Token with initial supply assigned to deployer.
 */
contract Indicoin is StandardToken {
    string public constant name = "Indicoin";
    string public constant symbol = "INDI";
    uint8 public constant decimals = 18;
    uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(decimals));

    constructor() {
        _totalSupply = INITIAL_SUPPLY;
        _balances[msg.sender] = INITIAL_SUPPLY;

        emit Transfer(address(0), msg.sender, INITIAL_SUPPLY);
    }
}

{
  "compilationTarget": {
    "Indicoin.sol": "Indicoin"
  },
  "evmVersion": "prague",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}