itxtoledo’s gists

davidecaruso / install-robo3t.sh

Last active October 22, 2021 07:26

Install Robo3T on Linux

	#!/bin/bash
	cd /tmp \|\| exit

	printf "Downloading Robo 3T...\n"
	filename="${1:-robo3t-1.4.4-linux-x86_64-e6ac9ec}"; # Default: v1.4.4
	wget -q https://download.studio3t.com/robomongo/linux/$filename.tar.gz
	if [ $? -ne 0 ];then
	printf "Invalid package given.\n"
	exit 1
	fi

islishude / create2_with_eip1167_Example.md

Created March 6, 2020 02:16

Solidity proxy with CREATE2

Complete example

pragma solidity ^0.6.2;

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address tokenOwner) external view returns (uint balance);
    function allowance(address tokenOwner, address spender) external view returns (uint remaining);
    function transfer(address to, uint tokens) external returns (bool success);

Spyna / push-notifications.js

Created August 29, 2019 15:13

Push notification manager

	const pushServerPublicKey = "BIN2Jc5Vmkmy-S3AUrcMlpKxJpLeVRAfu9WBqUbJ70SJOCWGCGXKY-Xzyh7HDr6KbRDGYHjqZ06OcS3BjD7uAm8";

	/**
	* checks if Push notification and service workers are supported by your browser
	*/
	function isPushNotificationSupported() {
	return "serviceWorker" in navigator && "PushManager" in window;
	}

	/**

bjoveski / address_calculation.js

Created August 9, 2019 20:30

	function buildCreate2Address(senderAddress, saltHex, bytecode) {
	return web3.utils.toChecksumAddress(`0x${web3.utils.sha3(`0x${[
	'ff',
	senderAddress,
	saltHex,
	web3.utils.sha3(bytecode)
	].map(x => x.replace(/0x/, ''))
	.join('')}`).slice(-40)}`);
	}

miguelmota / build_create2_address.js

Created November 17, 2018 06:28

JavaScript build ethereum create2 address (counterfactual smart contract address)

	function buildCreate2Address(creatorAddress, saltHex, byteCode) {
	const parts = [
	'ff',
	creatorAddress.slice(2),
	saltHex.slice(2),
	web3.utils.sha3(byteCode).slice(2),
	]

	const partsHash = web3.utils.sha3(`0x${parts.join('')}`)
	return `0x${partsHash.slice(-40)}`.toLowerCase()

willianmano / Lottery.sol

Created September 5, 2018 13:39

A Lottery Solidity Smart Contract

	pragma solidity ^0.4.21;

	contract Lottery {
	address public manager;
	address[] public players;

	constructor() public {
	manager = msg.sender;
	}

edhaase / SequelizeModels.js

Last active December 10, 2021 05:38

Load sequelize models from a folder

	/*
	* Not actually a JS file; Normally you'd break these components up.
	*/

	/* creating the database connection */
	var db = new Sequelize('database', 'username', 'password', ...);

	/* loading the models */
	var fs = require('fs');
	var path = require('path');

marcoscastro / grafos_lista.cpp

Created February 18, 2015 17:08

C++ - Grafos - Lista de adjacência

	// Grafos - Lista de adjacência

	#include <iostream>
	#include <list>
	#include <algorithm> // função find

	using namespace std;

	class Grafo
	{

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