A demo without 🚀 science, just simple UTXO spending logic.

Related tags

Third-party APIs Wrapperswallet-stucktx-demo
Overview

Stuck TX Demo

Docker container that runs 4 dogecoind to demonstrate "the stuck tx problem".

Scenario

  1. A wallet sends out 3 transactions to a recipient of resp 51k, 52k and 53k DOGE.
  2. All transactions get stuck because there is no miner that is accepting the fee
  3. The first transaction (tx0) gets replaced by respending its inputs
  4. The second transaction (tx1) gets replaced without respending inputs
  5. The third transaction (tx2) is forgotten
  6. When the wallet (or an attacker!!!) sends the original tx1 again, the recipient gets the amount twice

Usage

You need an x86 linux pc or vm with docker and git installed.

git clone https://github.com/patricklodder/wallet-stucktx-demo.git
cd wallet-stucktx-demo
docker build -t wallet-stucktx-demo:latest .
docker run wallet-stucktx-demo:latest

Example output

[00] Setup...  (T=T-2h)
  wallet: sends   txs with 0.10000000 DOGE/kb fee
  relay1: accepts txs with 1.00000000 DOGE/kb fee
  relay2: accepts txs with 0.00100000 DOGE/kb fee
   miner: accepts txs with 1.00000000 DOGE/kb fee

[01] Mining blocks and seeding wallet...  (T=T-2h)
  our wallet has 5 inputs with a total balance of 500000.00000000 DOGE

[02] Sending 3 too low fee transactions... (T-2h)
  tx0: 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 sending 51000 to n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP
  tx1: 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 sending 52000 to n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP
  tx2: 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc sending 53000 to n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP
  our wallet node has 3 mempool entries
  our wallet has 2 inputs with a total balance of 343999.93220000 DOGE

[03] Syncing mempools... (T=T-2h)
  wallet has 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
  wallet has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  wallet has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
  relay2 has 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
  relay2 has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  relay2 has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
  relay1 does not have 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
  relay1 does not have 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  relay1 does not have 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
   miner does not have 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
   miner does not have 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
   miner does not have 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool

[04] Mining a block... (T=T-2h)
  wallet still has 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
  wallet still has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  wallet still has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
  relay2 still has 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 in mempool
  relay2 still has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  relay2 still has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
  our wallet has 2 inputs with a total balance of 343999.93220000 DOGE

==============================================

[05] Timewarp back to the future, mempools expire... (T=T+0)
  wallet has 0 transactions in mempool
  relay1 has 0 transactions in mempool
  relay2 has 0 transactions in mempool
   miner has 0 transactions in mempool

[06] Our wallet seems confused now... (T=T+0)
  our wallet has 2 inputs with a total balance of 200000.00000000 DOGE
  very concern!

[07] But the wallet still remembers these transactions... (T=T+0)
  wallet remembers tx 041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 for -51000.00000000
  wallet remembers tx 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 for -52000.00000000
  wallet remembers tx 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc for -53000.00000000

[08] Replace tx0 for 51000 correctly... (T=T+0)
  copy inputs:
    aeaef799f34676b2de572d6de105485147263df68490cfe9232595a3a60f47b6 / 1
  copy outputs:
    mtPvDHF7AqorQiZzrAjnYT4Q1U8eJnKk1K: 48999.97740000
    n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP: 51000.00000000
  change fee to 1 DOGE by changing the change output:
    mtPvDHF7AqorQiZzrAjnYT4Q1U8eJnKk1K: 48999.00000000
  create, sign and push new tx:
    wallet sent d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528

[09] The replacement tx0 gets accepted everywhere... (T=T+0)
  wallet has d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528 in mempool
  relay1 has d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528 in mempool
  relay2 has d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528 in mempool
   miner has d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528 in mempool
  and gets mined...
  our wallet has 3 inputs with a total balance of 248999.00000000 DOGE
  that takes care of tx1! wow

[10] We do an oopsie and we accidentally: (T=T+0)
     send out a new tx1 without replacing the original inputs, and
     completely forget about tx2
  wallet has 31cf7f93fcf22ec5d83846c9bec8409d38a491faccd019844e1a5ad6bdf1ca50 in mempool
  relay1 has 31cf7f93fcf22ec5d83846c9bec8409d38a491faccd019844e1a5ad6bdf1ca50 in mempool
  relay2 has 31cf7f93fcf22ec5d83846c9bec8409d38a491faccd019844e1a5ad6bdf1ca50 in mempool
   miner has 31cf7f93fcf22ec5d83846c9bec8409d38a491faccd019844e1a5ad6bdf1ca50 in mempool
  it gets mined...
  our wallet has 3 inputs with a total balance of 196998.00000000 DOGE
  such confuse!!!

==============================================

[11] The miner updates... (T=T+0)
  wallet: sends   txs with 0.10000000 DOGE/kb fee
  relay1: accepts txs with 1.00000000 DOGE/kb fee
  relay2: accepts txs with 0.00100000 DOGE/kb fee
   miner: accepts txs with 0.00100000 DOGE/kb fee

[12] Our wallet sends out cached transactions... (T=T+0)
  wallet has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
  wallet has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool
   miner has 2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 in mempool
   miner has 1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc in mempool

[13] The cached transactions get mined... (T=T+0)
  our wallet has 5 inputs with a total balance of 291997.95480000 DOGE

  (negative confirmations indicate a replaced transaction)
  041166db29f2b683d6d93e80c89f1c21d6ed1784cca1affb1237f80ac35389d7 for -51000.00000000 has -4 conf
  2e81e9aeefeb6ca1e0c242bcb29e447ee70e5ae5e106e476d754ea7bb09b1d68 for -52000.00000000 has 1 conf
  1a0a798316436d96a5e0ef9fdc5ee563b38da973a7a589730ef7af9f01424acc for -53000.00000000 has 1 conf
  d7703393f53fce77f859e6ed3b7a8a96eaa3749d372ddce8500be85dadbf1528 for -51000.00000000 has 4 conf
  31cf7f93fcf22ec5d83846c9bec8409d38a491faccd019844e1a5ad6bdf1ca50 for -52000.00000000 has 3 conf

HOUSTON, WE HAVE A PROBLEM!
    let's make it n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP's problem!
    Dear n4LRQGEKcyRCXqD2MH3ompyMTJKitxu1WP, you owe us 52,000 DOGE. Plz send.

=====THE END=====
Owner
Patrick Lodder
Patrick Lodder
GitHub Repository
Bancos de Dados Relacionais (SQL) na AWS com Amazon RDS

Bancos de Dados Relacionais (SQL) na AWS com Amazon RDS Repositório para o Live Coding DIO do dia 24/11/2021 Serviços utilizados Amazon RDS AWS Lambda

Cassiano Ricardo de Oliveira Peres 4 Jul 30, 2022
Visualize size of directories, s3 buckets.

Dir Sizer This is a work in progress, right now consider this an Alpha or Proof of Concept level. dir_sizer is a utility to visualize the size of a di

Scott Seligman 13 Dec 08, 2022
A simple and easy to use musicbot in python and it uses lavalink.

Lavalink-MusicBot A simple and easy to use musicbot in python and it uses lavalink. ✨ Features plays music in your discord server well thats it i gues

Afnan 1 Nov 29, 2021
Get informed when your DeFI Earn CRO Validator is jailed or changes the commission rate.

CRO-DeFi-Warner Intro CRO-DeFi-Warner can be used to notify you when a validator changes the commission rate or gets jailed. It can also notify you wh

5 May 16, 2022
A simple but useful Discord Selfbot with essential features, made with discord.py-self.

Discord Selfbot Xyno Discord Selfbot Xyno is a simple but useful selfbot for Discord. It has currently limited useful features but it will be updated

Amit Pathak 7 Apr 24, 2022
A python notification tool used for sending you text messages when certain conditions are met in the game, Neptune's Pride.

A python notification tool used for sending you text messages when certain conditions are met in the game, Neptune's Pride.

Paul Clarke 1 Jan 16, 2022
An Open-Source Discord bot created to provide basic functionality which should be in every discord guild. We use this same bot with additional configurations for our guilds.

A Discord bot completely written to be taken from the source and built according to your own custom needs. This bot supports some core features and is

Tesseract Coding 14 Jan 11, 2022
This bot is made with Python and it is running using Docker container and is concentrated on heroku.

This bot is made with Python and it is running using Docker container and is concentrated on heroku.

Movindu Bandara 1 Nov 16, 2021
Add members to unlimited telegram channels and groups

Program Features 📌 Coded with Python version 10. 📌 without the need for a proxy. 📌 without the need for a Telegram ID. 📌 Ability to add infinite p

hack4lx 10 Nov 25, 2022
Discord bot that displays the current Swatch Internet Time (.beat) as a status.

Internet-Time-Display Discord bot that displays the current Swatch Internet Time (.beat) as a status. Visit the website! Add the bot to your server! A

2 Mar 15, 2022
Recursive-Bucket-Sort - An efficient sorting algorithm (implemented in Python) inspired by the Bucket Sort and the Pigeonhole Sort

Recursive Bucket Sorting Algorithm An algorithm (implemented here in Python) mai

Joshua McDonagh 1 Jan 24, 2022
A synchronous, object oriented API wrapper for thecatapi

cats.py A synchronous, object oriented API wrapper for thecatapi Table Of Content cats.py Table Of Content Installation Usage Contributing FAQ License

Marcus 2 Feb 04, 2022
A simple way to create a request to the coinpayment API with a valid HMAC using your private key and command

Coinpayments Verify TXID Created for Astral Discord bot A simple way to create a request to the coinpayment API with a valid HMAC using your private k

HellSec 1 Nov 07, 2022
Automatically kick deleted accounts

AntiDeletedAccountsBot (ADAB) Automatically kick deleted accounts Based on uniborg, a pluggable asyncio Telegram userbot based on Telethon. Installati

Qwerty-Space 34 Jan 02, 2023
Automated crypto trading bot as adapted from Algovibes.

crypto-trading-bot Automated crypto trading bot as adapted from Algovibes. Pre-requisites Ensure that you have created a Binance API key before procee

Kai Koh 33 Nov 01, 2022
A GUI Application that creates a Spotify Playlist from any year in the past, by just entering your preferred date

A GUI Application that creates a Spotify Playlist from any year in the past, by just entering your preferred date

David .K. Danso 1 Jan 17, 2022
Set of classes and tools to communicate with a Noso wallet using NosoP

NosoPy Set of classes and tools to communicate with a Noso wallet using NosoP(Noso Protocol). The data that can be retrieved consist of: Node informat

Noso Project 1 Jan 10, 2022
Simple Discord bot for the Collectez community.

Harvey - Discord Bot Simple Discord bot for the Collectez community. Features Ping the current status of Collectez's Teztools node. Steal emojis from

delintkhaum 1 Dec 26, 2021
A Python library for loading data from a SpaceX Starlink satellite.

Starlink Python A Python library for loading data from a SpaceX Starlink satellite. The goal is to be a simple interface for Starlink. It builds upon

Austin 2 Jan 16, 2022
Python API client library for phpIPAM installations

phpypam: Python API client library for phpIPAM installation As we started to develop phpipam-ansible-modules we used an existing python library for ph

codeaffen 3 Aug 03, 2022