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pragma solidity ^0.4.25;

contract ComputeContractAddress
{
    function addressFrom(address _origin, uint _nonce) public pure returns (address) {
        bytes memory data;
        if(_nonce == 0x00)          data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(0x80));
        else if(_nonce <= 0x7f)     data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(_nonce));
        else if(_nonce <= 0xff)     data = abi.encodePacked(byte(0xd7), byte(0x94), _origin, byte(0x81), uint8(_nonce));
        else if(_nonce <= 0xffff)   data = abi.encodePacked(byte(0xd8), byte(0x94), _origin, byte(0x82), uint16(_nonce));

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/**
 *Submitted for verification at Etherscan.io on 2020-08-22
*/

pragma solidity ^0.5.0;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".

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/**
 *Submitted for verification at Etherscan.io on 2020-07-03
*/

pragma solidity ^0.5.0;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".

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How to get on Rinkeby Testnet in less than 10 minutes

Following instructions from the excellent https://www.rinkeby.io/

Synchronizing a Full Node

A full node lets you access all state. There is a light node (state-on-demand) and wallet-only (no state) instructions as well,

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var Payroll = artifacts.require("./Payroll.sol");
var BigNumber = require('bignumber.js');
// Nodejs doesn't support import..from.. syntax now.
//import expectThrow from "zeppelin-solidity/test/helpers/expectThrow";;

var expectThrow = async function(promise) {
  try {
    await promise;
  } catch (err) {
    const revert_op = err.message.search('revert') >= 0;

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0x1738A04F8942489E68d39409bA9C5c7864C2D754

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0x1738A04F8942489E68d39409bA9C5c7864C2D754

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// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md   
contract ERC20 {                                                                   
    function totalSupply() constant returns (uint256 totalSupply);                 
    function balanceOf(address _owner) constant returns (uint256 balance);         
    function transfer(address _to, uint256 _value) returns (bool success);         
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
    function approve(address _spender, uint256 _value) returns (bool success);  
    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);

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// ==UserScript==
// @name           Google Search Better Privacy
// @description    Delete unnecessary params and add useful params on Google Search.
// @version        0.0.4
// @include        http://*.google.*/search*
// @include        http://*.google.*/imgres*
// @include        https://*.google.*/search*
// @include        https://*.google.*/imgres*
// @exclude        http://play.google.com/*
// @exclude        http://mail.google.com/*

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Preparing the Build Environment

cd ~/Desktop
mkdir wget-build
cd wget-build

Building & Installing GMP 5.0.2