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library SafeMath    - function mul(uint256 a, uint256 b)    - function div(uint256 a, uint256 b)    - function sub(uint256 a, uint256 b)    - function add(uint256 a, uint256 b)  contract ERC20Basic    - function balanceOf(address who)    - function transfer(address to, uint256 ...  contract ERC20 is ERC20Basic    - function allowance(address owner, add ...    - function transferFrom(address from, a ...    - function approve(address spender, uin ...  contract ERC677 is ERC20    - function transferAndCall(address to, ...  contract ERC677Receiver    - function onTokenTransfer(address _sen ...  contract BasicToken is ERC20Basic    - function transfer(address _to, uint25 ...    - function balanceOf(address _owner)  contract StandardToken is ERC20, B ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...    - function allowance(address _owner, ad ...    - function increaseApproval (address _s ...    - function decreaseApproval (address _s ...  contract ERC677Token is ERC677    - function transferAndCall(address _to, ...    - function contractFallback(address _to ...    - function isContract(address _addr)  contract LinkToken is StandardToke ... *    - function LinkToken()    - function transferAndCall(address _to, ...    - function transfer(address _to, uint _ ...    - function approve(address _spender, ui ...    - function transferFrom(address _from, ...

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/**
 *Submitted for verification at Etherscan.io on 2017-09-23
*/
pragma solidity ^0.4.16;
/**
 * @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) {
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• Callisto Network - April 14th, 2019 - Security Audit Report

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