---
# System prepended metadata

title: REORG.WTF

---

# REORG.WTF

#### Yet another public research unconference in the open with the brilliant super-coders.

**Date:** Saturday, Aug 7, 2021
**Time:** 12:00 - 17:30 ET / 9:00 - 14:30 PT / 16:00 - 21:30 UTC   
**Conference link:** https://www.crowdcast.io/e/reorg-wtf-summit (please use Chrome browser)
**Format:** [defi.wtf](http://defi.wtf/#/) meets [MEV Roast](https://github.com/flashbots/pm#mev-roast-recordings)
**Previous WTF event**: [MEV.wtf](https://hackmd.io/ivUzk3piQEG8ALzCGbxlag)
**MEV research grants:** [MEV Fellowship Grants](https://github.com/flashbots/mev-research/blob/main/grants.md)

*Brought to you by [Flashbots Research](https://github.com/flashbots/mev-research), special thanks to [IC3](https://www.initc3.org/) and [Dystopia Labs](https://dystopialabs.com/).*


## A bird's eye view on reorgs
* 12:00 - 12:20 ET | **Types of blockchain reorgs on various consensus algorithms** (20min)
    * Speaker: *[Georgios Konstantopoulos](https://twitter.com/gakonst)* 
    * Resources: [Blogpost](https://www.paradigm.xyz/2021/07/ethereum-reorgs-after-the-merge/) | [Slides](https://docs.google.com/presentation/d/1_bWx6ab15ScWSDGABnKcMJ3DStAOmBAj60mNx1zxEYg/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/1)
* 12:20 - 12:35 ET | **EVM-based 51% attack: an analysis** (20min)
    * Speaker: *[Yaz Khoury](https://twitter.com/Yazanator)*
    * Resoureces: [Slides](https://docs.google.com/presentation/d/1QOrVbYjzh6AxFWXUNeQ5CSURbxl05LV3ehOkJhW7ODs/edit#slide=id.p) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/2)| [Forkwatch Monitor](https://www.forkwatch.io/)
* 12:35 - 12:50 ET | **L2 fast finality and reorgs** (15min)
    * Speaker: *[Samuel Shadrach](https://twitter.com/SamuelShadrach4)*
    * Resoureces: [Slides](https://docs.google.com/presentation/d/1uX2JAGpz4KTb_91kHHmniVR5cNiqOCFTIqI2VWcxAAI/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/3)
* 12:50 - 13:10 ET | **Reorgs in PoS and multi-agent selfish mining** (20min)
    * Speaker: *[Michael Neuder](https://twitter.com/neuderthanyou)* 
    * Resources: [Paper](https://arxiv.org/abs/2102.02247) | [Slides](https://www.overleaf.com/project/6102d26284c027ba814f0932) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/4)
* 13:10 - 13:30 ET | **BDoS: "Reorg" across chains** (15min)
    * Speaker: *[Yan Ji](https://twitter.com/iseriohn42)*
    * Resources: [Paper](https://arxiv.org/abs/1912.07497) | [Slides](https://drive.google.com/drive/folders/1DwfGgJ-gazzRWkrUyypKfZ5bkQn25rRS) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/5)
* 13:30 - 13:50 ET | **Reorg counterattacks** (20min)
    * Speaker: *[Dan Moroz](https://twitter.com/dmoroz)*
    * Resources: [Paper](https://arxiv.org/pdf/2002.10736.pdf) | [Slides](https://drive.google.com/file/d/171IeGWEO9E1Sr0rmwNYXanLxMJOUyoY3/view) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/6)

## The op-eds: beyond NP-hard?
* 13:50 - 14:30 ET | **The tweet heard round the world? The binance hack & perspectives on reorg incentives** (40min)
    * Roast Master: *[Hasu](https://twitter.com/hasufl)*
    * Panelists: *[Brandon Curtis](https://twitter.com/bcmakes), [James Prestwich](https://twitter.com/_prestwich), [Jeremy Rubin](https://twitter.com/JeremyRubin)*
    * Resources: [Context](https://twitter.com/JeremyRubin/status/1125919526485254144?s=20) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/7) 
* 14:30 - 14:45 ET | **Why reorgs are negative sum** (15min)
    * Speaker: *[Phil Daian](https://twitter.com/phildaian)*
    * Resources: [Blogpost](https://medium.com/flashbots/flashbots-on-reorgs-914e397b78d8) | [Slides](https://docs.google.com/presentation/d/1W1rQsGHGX5w9qpsCOMMAFSNdLIxx0sOHnTsp0ZVmdvU/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/8)
* 14:45 - 15:00 ET | **MEV democratization and reorgs** (15min)
    * Speaker: *[Mahimna Kelkar](https://twitter.com/_mahimna)*
    * Resources: [Slides](https://drive.google.com/file/d/1_TsO2gSf14uObvnL8QFQxb81q9aTw0jr/view?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/9)
* 15:00 - 15:15 ET | **Are forks a good thing? Fast finality blockchains and reorgs** (15min)
    * Speaker: *[Zaki Manian](https://twitter.com/zmanian)*
    * Resources: [Context](https://twitter.com/bascule/status/1420121869328388098?s=21) | [Notes](https://gist.github.com/zmanian/d31ded59bd0604ad1135c620086f78ad) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/10)
* 15:15 - 16:00 ET | **Technical challenges: reorg softwares and reorg protections** (45min)
    * Roast Master: *[Phil Daian](https://twitter.com/phildaian)*
    * Panelist: *[Sunny Aggarwal](https://twitter.com/sunnya97), [Rick Dudley](https://twitter.com/AFDudley0), [Daniel Goldman](https://twitter.com/DZack23), [thegostep](https://twitter.com/thegostep), [Nathan Worsley](https://twitter.com/NathanWorsley_), [Vlad Zamfir](https://twitter.com/VladZamfir)*
    * Resources: [Roast Questions](https://docs.google.com/document/d/1WQTAxOp7f4icfJyt0oVmL1PeM22acEQ6LNIfQHvEapg/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/11)

## Reorg and mitigation on Ethereum
### The Past and Present
* 16:00 - 16:20 ET | **Searching for Ethereum reorgs** (20min)
    * Speaker: *[Robert Miller](https://twitter.com/bertcmiller)*
    * Resources: [Slides](https://drive.google.com/file/d/14kOjc7voXY49ifjPrx0yis0kaHj8bJ5N/view) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/12)
* 16:20 - 16:40 ET| **Understanding the economic motivation for reorgs and how to counter** (20min)
    * Speaker: *[Saneel Sreeni](https://twitter.com/sanlsrni/status/1417530572562391041?s=20) & [Ivan Bogatyy](https://twitter.com/IvanBogatyy)*
    * Resources: [Blogpost](https://medium.com/dragonfly-research/dr-reorg-or-how-i-learned-to-stop-worrying-and-love-mev-2ee72b428d1d) | [Slides](https://docs.google.com/presentation/d/1LG_dVXwRshTuEkzv-B4z8SEOg-a07pr-kafXj6BKC5I/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/13)
* 16:40 - 17:00 ET | **So you want to build a pool for reorgs? NGMI** (20min)
    * Speaker: *[Ivan Bogatyy](https://twitter.com/IvanBogatyy)*
    * Resources: [Blogpost](https://github.com/Mining-DAO/docs/blob/master/ethereum-mining-pool-howto.md) | [Slides](https://docs.google.com/presentation/d/14T2pXH-sYFGJ6HRaynNfUb6KJjcF3vKhhEx_yD3Rtkw/edit?usp=sharing) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/14)

### The Future
* 17:00 - 17:30 ET | **Ethereum reorgs after the merge** (30min)
    * Speaker: *[Vitalik Buterin](https://twitter.com/VitalikButerin)*
    * Resources: [Blogpost](https://www.paradigm.xyz/2021/07/ethereum-reorgs-after-the-merge/) | [Slides](https://hackmd.io/@vbuterin/reorg_wtf_slides) | [Video Recap](https://www.crowdcast.io/e/reorg-wtf-summit/15)