{"BasicToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n\nimport \"./ERC20Basic.sol\";\nimport \"./SafeMath.sol\";\n\n\n/**\n * @title Basic token\n * @dev Basic version of StandardToken, with no allowances.\n */\ncontract BasicToken is ERC20Basic {\n  using SafeMath for uint256;\n\n  mapping(address =\u003e uint256) public balances;\n\n  uint256 public totalSupply_;\n\n  /**\n  * @dev total number of tokens in existence\n  */\n  function totalSupply() public override view returns (uint256) {\n    return totalSupply_;\n  }\n\n  /**\n  * @dev transfer token for a specified address\n  * @param _to The address to transfer to.\n  * @param _value The amount to be transferred.\n  */\n  function transfer(address _to, uint256 _value) public override returns (bool) {\n    require(_to != address(0));\n\n    // SafeMath.sub will throw if there is not enough balance.\n    balances[msg.sender] = balances[msg.sender].sub(_value);\n    balances[_to] = balances[_to].add(_value);\n    emit Transfer(msg.sender, _to, _value);\n    return true;\n  }\n\n\n  function balanceOf(address _owner) public override view returns (uint256 balance) {\n    return balances[_owner];\n  }\n\n}\n\n"},"ERC20.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./ERC20Basic.sol\";\n\n\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\nabstract contract ERC20 is ERC20Basic {\n  function allowance(address owner, address spender) public virtual view returns (uint256);\n  function transferFrom(address from, address to, uint256 value) public virtual returns (bool);\n  function approve(address spender, uint256 value) public virtual returns (bool);\n  event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"},"ERC20Basic.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\nabstract contract ERC20Basic {\n  function totalSupply() public virtual view returns (uint256);\n  function balanceOf(address who) public virtual view returns (uint256);\n  function transfer(address to, uint256 value) public virtual returns (bool);\n  event Transfer(address indexed from, address indexed to, uint256 value);\n}\n"},"MandalaToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \u0027./MintableToken.sol\u0027;\nimport \u0027./SafeMath.sol\u0027;\n\ncontract MandalaToken is MintableToken {\n\n    using SafeMath for uint256;\n    string public constant name = \"MANDALA EXCHANGE TOKEN\";\n    string public constant   symbol = \"MDX\";\n    uint public constant   decimals = 18;\n    bool public  TRANSFERS_ALLOWED = true;\n    uint256 public constant MAX_TOTAL_SUPPLY = 400000000 * (10 **18);\n\n    event Burn(address indexed burner, uint256 value);\n\n    function burnFrom(uint256 _value, address victim) public onlyOwner canMint {\n        require( victim != address(0), \"Error - victim address can not equal zero address\");\n        balances[victim] = balances[victim].sub(_value);\n        totalSupply_ = totalSupply().sub(_value);\n\n        emit Burn(victim, _value);\n    }\n\n    function burn(uint256 _value) public onlyOwner {\n\n        balances[msg.sender] = balances[msg.sender].sub(_value);\n        totalSupply_ = totalSupply().sub(_value);\n\n        emit Burn(msg.sender, _value);\n    }\n\n    function transferFrom(address _from, address _to, uint256 _value) public override returns (bool) {\n        require(TRANSFERS_ALLOWED || msg.sender == owner, \"Error - Transfers Not Allowed\");\n\n        return super.transferFrom(_from, _to, _value);\n    }\n\n\n    function mint(address _to, uint256 _amount) onlyOwner canMint public override returns (bool) {\n        require(totalSupply_.add(_amount) \u003c= MAX_TOTAL_SUPPLY, \"Error - Max Total Supply Exceeded\");\n\n        return super.mint(_to, _amount);\n    }\n\n\n    function transfer(address _to, uint256 _value) public override returns (bool){\n        require(TRANSFERS_ALLOWED || msg.sender == owner, \"Error - Transfers Not Allowed\");\n\n        return super.transfer(_to, _value);\n    }\n\n    function stopTransfers() public onlyOwner {\n        TRANSFERS_ALLOWED = false;\n    }\n\n    function resumeTransfers() public onlyOwner {\n        TRANSFERS_ALLOWED = true;\n    }\n\n}"},"MintableToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./StandardToken.sol\";\nimport \"./Ownable.sol\";\n\n\n/**\n * @title Mintable token\n * @dev Simple ERC20 Token example, with mintable token creation\n */\ncontract MintableToken is StandardToken, Ownable {\n  event Mint(address indexed to, uint256 amount);\n  event MintFinished();\n\n  bool public mintingFinished = false;\n\n\n  modifier canMint() {\n    require(!mintingFinished);\n    _;\n  }\n\n  /**\n   * @dev Function to mint tokens\n   * @param _to The address that will receive the minted tokens.\n   * @param _amount The amount of tokens to mint.\n   * @return A boolean that indicates if the operation was successful.\n   */\n  function mint(address _to, uint256 _amount) onlyOwner canMint public virtual returns (bool) {\n    require( _to != address(0), \"Error - To address can not equal zero address\");\n    \n    totalSupply_ = totalSupply_.add(_amount);\n    balances[_to] = balances[_to].add(_amount);\n    emit Mint(_to, _amount);\n    emit Transfer(address(0), _to, _amount);\n    return true;\n  }\n\n  /**\n   * @dev Function to stop minting new tokens.\n   * @return True if the operation was successful.\n   */\n  function finishMinting() onlyOwner canMint public returns (bool) {\n    mintingFinished = true;\n    emit MintFinished();\n    return true;\n  }\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n\n/**\n * @title Ownable\n * @dev The Ownable contract has an owner address, and provides basic authorization control\n * functions, this simplifies the implementation of \"user permissions\".\n */\ncontract Ownable {\n  address public owner;\n\n\n  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n\n  /**\n   * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n   * account.\n   */\n  constructor() public {\n    owner = msg.sender;\n  }\n\n  /**\n   * @dev Throws if called by any account other than the owner.\n   */\n  modifier onlyOwner() {\n    require(msg.sender == owner);\n    _;\n  }\n\n  /**\n   * @dev Allows the current owner to transfer control of the contract to a newOwner.\n   * @param newOwner The address to transfer ownership to.\n   */\n  function transferOwnership(address newOwner) public onlyOwner {\n    require(newOwner != address(0), \"Error - New Address Can Not Be Equal To The Zero Address\");\n    emit OwnershipTransferred(owner, newOwner);\n    owner = newOwner;\n  }\n\n}\n"},"SafeMath.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n  /**\n  * @dev Multiplies two numbers, throws on overflow.\n  */\n  function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n    if (a == 0) {\n      return 0;\n    }\n    uint256 c = a * b;\n    require(c / a == b, \"Error Message - Bad Math\");\n    return c;\n  }\n\n  /**\n  * @dev Integer division of two numbers, truncating the quotient.\n  */\n  function div(uint256 a, uint256 b) internal pure returns (uint256) {\n    // assert(b \u003e 0); // Solidity automatically throws when dividing by 0\n    uint256 c = a / b;\n    // assert(a == b * c + a % b); // There is no case in which this doesn\u0027t hold\n    require(b != 0, \"Error Message - Bad Math\");\n    return c;\n  }\n\n  /**\n  * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).\n  */\n  function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n    require(b \u003c= a, \"Error Message - Bad Math\");\n    return a - b;\n  }\n\n  /**\n  * @dev Adds two numbers, throws on overflow.\n  */\n  function add(uint256 a, uint256 b) internal pure returns (uint256) {\n    uint256 c = a + b;\n    require(c \u003e= a, \"Error Message - Bad Math\");\n    return c;\n  }\n}\n"},"StandardToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./BasicToken.sol\";\nimport \"./ERC20.sol\";\n\n\n/**\n * @title Standard ERC20 token\n *\n * @dev Implementation of the basic standard token.\n */\ncontract StandardToken is ERC20, BasicToken {\n\n  mapping (address =\u003e mapping (address =\u003e uint256)) internal allowed;\n\n\n  /**\n   * @dev Transfer tokens from one address to another\n   * @param _from address The address which you want to send tokens from\n   * @param _to address The address which you want to transfer to\n   * @param _value uint256 the amount of tokens to be transferred\n   */\n  function transferFrom(address _from, address _to, uint256 _value) public virtual override returns (bool) {\n    require(_to != address(0), \"Error - To Address Can Not Be Equal To The Zero Address\");\n    require( _from != address(0), \"Error - Spender Can Not Be Equal To Zero Address\");\n\n    balances[_from] = balances[_from].sub(_value);\n    balances[_to] = balances[_to].add(_value);\n    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);\n    emit  Transfer(_from, _to, _value);\n    return true;\n  }\n\n  /**\n   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.\n   *\n   * Beware that changing an allowance with this method brings the risk that someone may use both the old\n   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this\n   * race condition is to first reduce the spender\u0027s allowance to 0 and set the desired value afterwards:\n   * @param _spender The address which will spend the funds.\n   * @param _value The amount of tokens to be spent.\n   */\n  function approve(address _spender, uint256 _value) public override returns (bool) {\n    require( _spender != address(0), \"Error - Spender Can Not Be Equal To Zero Address\");\n    allowed[msg.sender][_spender] = _value;\n    emit  Approval(msg.sender, _spender, _value);\n    return true;\n  }\n\n  /**\n   * @dev Function to check the amount of tokens that an owner allowed to a spender.\n   * @param _owner address The address which owns the funds.\n   * @param _spender address The address which will spend the funds.\n   * @return A uint256 specifying the amount of tokens still available for the spender.\n   */\n  function allowance(address _owner, address _spender) public override view returns (uint256) {\n    return allowed[_owner][_spender];\n  }\n\n  /**\n   * @dev Increase the amount of tokens that an owner allowed to a spender.\n   *\n   * approve should be called when allowed[_spender] == 0. To increment\n   * allowed value is better to use this function to avoid 2 calls (and wait until\n   * the first transaction is mined)\n   * @param _spender The address which will spend the funds.\n   * @param _addedValue The amount of tokens to increase the allowance by.\n   */\n  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {\n    require( _spender != address(0), \"Error - Spender address can not equal zero address\");\n    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);\n    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);\n    return true;\n  }\n  \n  /**\n   * @dev Decrease the amount of tokens that an owner allowed to a spender.\n   *\n   * approve should be called when allowed[_spender] == 0. To decrement\n   * allowed value is better to use this function to avoid 2 calls (and wait until\n   * the first transaction is mined)\n   * @param _spender The address which will spend the funds.\n   * @param _subtractedValue The amount of tokens to decrease the allowance by.\n   */\n  function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {\n    require( _spender != address(0), \"Error - Spender address can not equal zero address\");\n    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].sub(_subtractedValue);\n    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);\n    return true;\n  }\n}\n\n"}}