Bitcoin Roundtable Consensus

On February 21st, 2016, in Hong Kong’s Cyberport, representatives from the bitcoin industry and members of the development community have agreed on the following points:

• We understand that SegWit continues to be developed actively as a soft-fork and is likely to proceed towards release over the next two months, as originally scheduled.
• We will continue to work with the entire Bitcoin protocol development community to develop, in public, a safe hard-fork based on the improvements in SegWit. The Bitcoin Core contributors present at the Bitcoin Roundtable will have an implementation of such a hard-fork available as a recommendation to Bitcoin Core within three months after the release of SegWit.
• This hard-fork is expected to include features which are currently being discussed within technical communities, including an increase in the non-witness data to be around 2 MB, with the total size no more than 4 MB, and will only be adopted with broad support across the entire Bitcoin community.
• We will run a SegWit release in production by the time such a hard-fork is released in a version of Bitcoin Core.
• We will only run Bitcoin Core-compatible consensus systems, eventually containing both SegWit and the hard-fork, in production, for the foreseeable future.
• We are committed to scaling technologies which use block space more efficiently, such as Schnorr multisig.

Based on the above points, the timeline will likely follow the below dates.

• SegWit is expected to be released in April 2016.
• The code for the hard-fork will therefore be available by July 2016.
• If there is strong community support, the hard-fork activation will likely happen around July 2017.

The undersigned support this roadmap.

Together, we are:

Kevin Pan Manager AntPool

Anatoly Legkodymov CEO A-XBT

Larry Salibra Bitcoin Association Hong Kong

Leonhard Weese Bitcoin Association Hong Kong

Cory Fields Bitcoin Core Contributor

Johnson Lau Bitcoin Core Contributor

Luke Dashjr Bitcoin Core Contributor

Matt Corallo Bitcoin Core Contributor

Peter Todd Bitcoin Core Contributor

Kang Xie Bitcoin Roundtable

Phil Potter Chief Strategy Officer Bitfinex

Valery Vavilov CEO BitFury

Alex Petrov CIO BitFury

Jihan Wu Co-CEO Bitmain

Micree Zhan Co-CEO Bitmain

James Hilliard Pool/Farm Admin BitmainWarranty

Yoshi Goto CEO BitmainWarranty

Alex Shultz CEO BIT-X Exchange

Han Solo CEO Blockcloud

Adam Back President Blockstream

Bobby Lee CEO BTCC

Samson Mow COO BTCC

Robin Yao CTO BW

Obi Nwosu Managing Director Coinfloor

Mark Lamb Founder Coinfloor

Wang Chun Admin F2Pool

Marco Streng CEO Genesis Mining

Marco Krohn CFO Genesis Mining

Oleksandr Lutskevych CEO GHash.IO & CEX.IO

Wu Gang CEO HaoBTC

Leon Li CEO Huobi

Zhang Jian Vice President Huobi

Eric Larchevêque CEO Ledger

Jack Liao CEO LIGHTNINGASIC & BitExchange

Star Xu CEO OKCoin

Jack Liu Head of International OKCoin

Guy Corem CEO Spondoolies-Tech

Pindar Wong Sponsor

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