miguelmota

Instructions

Unofficial guide on deploying a custom Optimism rollup on Kovan

⚠️ Notice: Guide updated April 2021. Check out the Optimism discord for additional help and support.

Clone optimism contracts:

git clone git@github.com:ethereum-optimism/optimism.git

spalladino

Falsehoods that Ethereum programmers believe

I recently stumbled upon Falsehoods programmers believe about time zones, which got a good laugh out of me. It reminded me of other great lists of falsehoods, such as about names or time, and made me look for an equivalent for Ethereum. Having found none, here is my humble contribution to this set.

About Gas

Calling estimateGas will return the gas required by my transaction

Calling estimateGas will return the gas that your transaction would require if it were mined now. The current state of the chain may be very different to the state in which your tx will get mined. So when your tx i

qbig

package main

import (
    "bytes"
    "crypto/ecdsa"
    "fmt"
    "log"

    "github.com/ethereum/go-ethereum/common/hexutil"
    "github.com/ethereum/go-ethereum/crypto"

garybernhardt

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

glamp

Modifying an Existing Docker Image

To install a custom package or modify an existing docker image we need to

1. run a docker a container from the image we wish to modify
2. modify the docker container
3. commit the changes to the container as a docker image
4. test changes made to image

1.) Running a docker container from an image

jhjguxin

nginx 403 Forbidden Error hosting in User Home Directory

resources

• http://serverfault.com/questions/416787/nginx-403-forbidden-error-hosting-in-user-home-directory
• rails deploy with rvm, capistrano, uniron, nginx

runtime environment

mreid

package demo;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;