kaichen

paper 1904.05234 Flash Boys 2.0: Frontrunning, Transaction Reordering, and Consensus Instability in Decentralized Exchanges

flashbots docs

• flashbots/mev-research: Project management for MEV Research
• flashbots/pm: Everything there is to know about Flashbots

on eth research

• https://ethresear.ch/t/mev-auctions-will-kill-ethereum/9060
• https://ethresear.ch/t/flashbots-frontrunning-the-mev-crisis/8251

kaichen

{
    "ret": [
        {
            "contractRet": "SUCCESS"
        }
    ],
    "signature": [
        "e788847a9b215d40b3abff32fd33724f2089e948273c6597f0431446dc0863437c18163cf8b0a3ab0827eb57a0bbae9fce7daa0ad9dd3c8f0406d55f132b851000"
    ],
    "txID": "78758c5303a49b7b9d010853b8774c55a554b57a26060190e3e338cb70043081",

kaichen

/* GET /allocate.json HTTP/1.1 */
{
	"api": ["124.250.3.102", "124.250.3.103", "101.201.175.228", "182.92.251.113"],
	"expires": 300,
	"fund": ["124.250.3.84", "124.250.3.85"],
	"https": true,
	"im": ["124.250.3.78:8080", "124.250.3.78:80", "124.250.3.78:8400", "124.250.3.79:8080", "124.250.3.78:443", "124.250.3.79:443", "124.250.3.78:8443", "124.250.3.79:8400", "124.250.3.79:8443", "124.250.3.79:80"],
	"pingan": ["124.250.3.102", "124.250.3.101"],
	"promo": ["124.250.3.102", "124.250.3.103"],
	"stock": ["182.92.251.113", "101.201.175.228", "124.250.3.102", "124.250.3.103"],

kaichen

-
  province: 北京市
  cities:
    - 北京市
-
  province: 天津市
  cities:
    - 天津市
-
  province: 上海市

kaichen

# List of plugins
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-sensible'

set -g @plugin 'tmux-plugins/tmux-resurrect'
set -g @plugin 'tmux-plugins/tmux-sessionist'
set -g @plugin 'tmux-plugins/tmux-continuum'

# Other examples:
# set -g @plugin 'github_username/plugin_name'

kaichen

#!/usr/bin/env bash

apt-get -y update
apt-get -y install build-essential zlib1g-dev libssl-dev libreadline5-dev libyaml-dev
cd /tmp
wget http://ruby.taobao.org/mirrors/ruby/1.9/ruby-1.9.3-p194.tar.gz
tar -xvzf ruby-1.9.3-p194.tar.gz
cd ruby-1.9.3-p194/
./configure --prefix=/usr/local --disable-install-rdoc
make

kaichen

{
  "app_state": {
    "accounts": [
      {
        "account_number": "679",
        "address": "cosmos1qqp837a4kvtgplm6uqhdge0zzu6efqgujllfst",
        "coins": [
          {
            "amount": "60091022",
            "denom": "uatom"

kaichen

{
  "actions": [
    {
      "_id": "5c232c16b5035bc1a6dc7585",
      "receipt": {
        "receiver": "luckymearena",
        "act_digest": "f7b0b39cac563a1ab054a192ef017a7d45e34e07a12b49e0ed29bd117f3448ba",
        "global_sequence": 3310712726,
        "recv_sequence": 2827,
        "auth_sequence": [

kaichen

ENS

Home | GitHub | Medium

read

• EIP-137: Ethereum Domain Name Service Specification
• A beginner’s guide to buying an ENS domain

concept

• node, hash content for privacy
• label

kaichen

luxe ens managment

data structure:

mapping(uint=>mapping(address=>bool)) public registrars; // Maps IANA IDs to authorised accounts
mapping(bytes32=>uint) public nonces; // Maps namehashes to domain nonces

keep track mapping of user id and ethereum address, and domain nonce