Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- pragma solidity ^0.4.19;
- /**
- * @title SafeMath
- * @dev Math operations with safety checks that throw on error
- */
- library SafeMath {
- function mul(uint256 a, uint256 b) internal constant returns (uint256) {
- uint256 c = a * b;
- assert(a == 0 || c / a == b);
- return c;
- }
- function div(uint256 a, uint256 b) internal constant returns (uint256) {
- // assert(b > 0); // Solidity automatically throws when dividing by 0
- uint256 c = a / b;
- // assert(a == b * c + a % b); // There is no case in which this doesn't hold
- return c;
- }
- function sub(uint256 a, uint256 b) internal constant returns (uint256) {
- assert(b <= a);
- return a - b;
- }
- function add(uint256 a, uint256 b) internal constant returns (uint256) {
- uint256 c = a + b;
- assert(c >= a);
- return c;
- }
- }
- contract Token {
- /// @return total amount of tokens
- function totalSupply() constant returns (uint256 supply) {}
- /// @param _owner The address from which the balance will be retrieved
- /// @return The balance
- function balanceOf(address _owner) constant returns (uint256 balance) {}
- /// @notice send `_value` token to `_to` from `msg.sender`
- /// @param _to The address of the recipient
- /// @param _value The amount of token to be transferred
- /// @return Whether the transfer was successful or not
- function transfer(address _to, uint256 _value) returns (bool success) {}
- /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
- /// @param _from The address of the sender
- /// @param _to The address of the recipient
- /// @param _value The amount of token to be transferred
- /// @return Whether the transfer was successful or not
- function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
- /// @notice `msg.sender` approves `_addr` to spend `_value` tokens
- /// @param _spender The address of the account able to transfer the tokens
- /// @param _value The amount of wei to be approved for transfer
- /// @return Whether the approval was successful or not
- function approve(address _spender, uint256 _value) returns (bool success) {}
- /// @param _owner The address of the account owning tokens
- /// @param _spender The address of the account able to transfer the tokens
- /// @return Amount of remaining tokens allowed to spent
- function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
- event Transfer(address indexed _from, address indexed _to, uint256 _value);
- event Approval(address indexed _owner, address indexed _spender, uint256 _value);
- uint public decimals;
- string public name;
- }
- /**
- * @title Ownable
- * @dev The Ownable contract has an owner address, and provides basic authorization control
- * functions, this simplifies the implementation of "user permissions".
- */
- contract Ownable {
- address public owner;
- /**
- * @dev The Ownable constructor sets the original `owner` of the contract to the sender
- * account.
- */
- function Ownable() public {
- owner = msg.sender;
- }
- /**
- * @dev Throws if called by any account other than the owner.
- */
- modifier onlyOwner() {
- require(msg.sender == owner);
- _;
- }
- /**
- * @dev Allows the current owner to transfer control of the contract to a newOwner.
- * @param newOwner The address to transfer ownership to.
- */
- function transferOwnership(address newOwner) onlyOwner public {
- require(newOwner != address(0));
- owner = newOwner;
- }
- }
- contract AirDrop is Ownable {
- address public tokenAddress;
- Token public token;
- uint256 public valueAirDrop;
- mapping (address => uint8) public payedAddress;
- function AirDrop() public{
- tokenAddress = 0xxxxxxxxxxxxxxxxxxxxxxxxxxxx;
- token = Token(tokenAddress);
- valueAirDrop = 100;
- }
- function setTokenAddress(address _address) onlyOwner public{
- tokenAddress = _address;
- token = Token(tokenAddress);
- }
- function refund() onlyOwner public{
- token.transfer(owner, token.balanceOf(this));
- }
- function () external payable {
- require(msg.value == 0);
- require(payedAddress[msg.sender] == 0);
- payedAddress[msg.sender] = 1;
- token.transfer(msg.sender, valueAirDrop);
- }
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement