A demo without ๐Ÿš€ science, just simple UTXO spending logic.

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
C Y B ฮž R UserBot is a project that simplifies the use of Telegram. All rights reserved.

C Y B ฮž R USฮžRBOT ๐Ÿ‡ฆ๐Ÿ‡ฟ C Y B ฮž R UserBot is a project that simplifies the use of Telegram. All rights reserved. Automatic Setup Android: open Termux p

C Y B ฮž R 0 Sep 20, 2022
A discord program that will send a message to nearly every user in a discord server

Discord Mass DM Scrapes users from a discord server to promote/mass dm Report Bug ยท Request Feature Features Asynchronous Easy to use Free Auto scrape

dropout 56 Jan 02, 2023
Tweet stream in OBS browser source

Tweetron TweetronใฏOBSใƒ–ใƒฉใ‚ฆใ‚ถใƒผใ‚ฝใƒผใ‚นใ‚’ไฝฟ็”จใ—ใฆใƒ„ใ‚คใƒผใƒˆใ‚’็”ป้ขไธŠใซ่กจ็คบใ™ใ‚‹ใƒ„ใƒผใƒซใ‚ฝใƒ•ใƒˆใงใ™ Windowsใฎใฟๅฏพๅฟœ (Windows10ๅ‹•ไฝœ็ขบ่ชๆธˆ) ใƒ€ใ‚ฆใƒณใƒญใƒผใƒ‰ ใ“ใกใ‚‰ใ‹ใ‚‰ๆœ€ๆ–ฐ็‰ˆใ‚’ใƒ€ใ‚ฆใƒณใƒญใƒผใƒ‰ใ—ใฆใใ ใ•ใ„ (็พๅœจใƒ™ใƒผใ‚ฟใƒ†ใ‚นใƒˆ็‰ˆใ‚’้…ๅธƒใ—ใฆใ„ใพใ™) Download ver0.0.

Cube 0 Apr 05, 2022
An open source API to validate the EU Covid Certificates / Green Certificates

Open Covid Certificate Validator This an open source API to validate EU Digital COVID Certificates. It receives a COVID certificate and validates it u

Merlin Schumacher 47 May 30, 2022
A simple economy bot for discord!

Enter all the correct values in the given configuration.json file. Make sure that BOT_TOKEN is a string value, and that OWNER_ID and GUILD_ID are integer values.

WonkyPigs 0 Aug 22, 2022
Aio-binance-library - Async library for connecting to the Binance API on Python

aio-binance-library Async library for connecting to the Binance API on Python Th

GRinvest 10 Nov 21, 2022
A python wrapper for the mangadex API V5. Work in progress

mangadex A python wrapper for the mangadex API V5. It uses the requests library and all the aditional arguments can be viewed in the Official Mangadex

Eduardo Ceja 27 Dec 14, 2022
A simple, multipurpose Discord bot.

EpicBot ๐Ÿ… A simple, multipurpose Discord bot. โ€ข Info EpicBot is a multipurpose Discord bot that was designed to make your Discord life easier and coo

Nirlep_5252_ 130 Dec 29, 2022
Instagram bot that upload images for you which scrape posts from 9gag meme website or other Instagram users , which is 24/7 Automated Runnable.

Autonicgram Automates your Instagram posts by taking images from sites like 9gag or other Instagram accounts and posting it onto your page. Features A

Mastermind 20 Sep 17, 2022
Uploader-Bot - A Modified Telegram Url Uploader Bot With Mongodb, Zee5, Sonyliv Support and Many Other Yt-dlp Sites

๐š๐šŽ๐šš๐šž๐š’๐š›๐šŽ๐š ๐š…๐šŠ๐š›๐š’๐šŠ๐š‹๐š•๐šŽ๐šœ ๐Ÿ”Š APP_ID API_HASH TG_BOT_TOKEN DATABASE_URL

11 Sep 10, 2022
Python function to construct an ODS spreadsheet on the fly - without having to store the entire file in memory or disk

stream-write-ods Python function to construct an ODS (OpenDocument Spreadsheet) on the fly - without having to store the entire file in memory or disk

Department for International Trade 1 Oct 09, 2022
A Python library to access Instagram's private API.

Instagram Private API A Python wrapper for the Instagram private API with no 3rd party dependencies. Supports both the app and web APIs. Overview I wr

2.6k Jan 05, 2023
Bringing Ethereum Virtual Machine to StarkNet at warp speed!

Warp Warp brings EVM compatible languages to StarkNet, making it possible to transpile Ethereum smart contracts to Cairo, and use them on StarkNet. Ta

Nethermind 700 Dec 26, 2022
Prometheus exporter for CNMC API

CNMC Prometheus exporter It needs a Prometheus Pushgateway Install requirements via pip install -r requirements.txt Export the following environment v

GISCE-TI 1 Oct 20, 2021
Discord bot for the IOTA Wiki

IOTA Wiki Bot Discord bot for the IOTA Wiki Report Bug ยท Request Feature About The Project This is a Discord bot for the IOTA Wiki. It's currently use

IOTA Community 2 Nov 14, 2021
Unofficial WebApp for WhatsApp Web created in PyQt6

Unofficial WebApp for WhatsApp Web created in PyQt6 using PyQt6-WebEngine

Rafael Tosta Santos 126 Dec 20, 2022
A wrapper to stream information from Twitter's Full-Archive Search Endpoint

A wrapper to stream information from Twitter's Full-Archive Search Endpoint. To exploit this library, one must have approved academic research access.

Daniela Pinto Veizaga 9 Nov 28, 2022
A component of BuzzUtilityBot that allows for inter-server communication

A component of BuzzUtilityBot that allows for inter-server communication! Separated due to privacy and ease of inspection concerns

OHaiiBuzzle 2 Oct 11, 2022
Share your files on local network just by one click.

Share Your Folder This script helps you to share any folder anywhere on your local network. it's possible to use the script on both: Windows (Click he

Mehran Seifalinia 15 Oct 23, 2022
Stream Telegram files to web

Telegram File Stream Bot A Telegram bot to stream files to web Demo Bot ยป Report a Bug | Request Feature Table of Contents About this Bot Original Rep

Wrench 572 Jan 09, 2023