Segwit2x Beta Released as New UAHF Code Proposal `ABC´ Removes 1MB-Limit

Segwit2x Beta Released and New UAHF Code Proposal `ABC´ Removes 1MB-Limit

Saturday, July 1st was filled with fresh new code as the Segwit2x working group released the team’s protocol beta v1.14.3 with release notes. Alongside this, a new implementation of a user-activated hard fork (UAHF) was made available for download the same day.

Also read: Mining, Merchants, and Traders—Thailand’s Got the Bitcoin Fever

The Segwit2x Beta Codebase Has Been Released

Segwit2x Beta Released as New UAHF Code Proposal `ABC´ Removes 1MB-LimitThere’s a lot going on behind the scenes in the world of bitcoin development and even more so within the context of scaling. This weekend the Segwit2x beta was released, as well as a bitcoin developer’s mailing list message from Jeff Garzik who’s been doing a lot of the code work for this project. The new release includes various bug fixes and consensus changes according to the Github repo.

“The charter and goal of the segwit2x effort has always been tightly focused on a “SegWit + 2M HF” safe network upgrade, and producing/testing/auditing software to accomplish that,” explains the Segwit2x beta release. “Milestones are intentionally labeled “alpha” or “beta” per normal software engineering practices, and expectations should be set accordingly.”

The over-simplified summary of the network upgrade sequence is: bit-4 SegWit activation + 144*90 blocks This matches the goal outlined in the kickoff Project Mission: “Segwit will start being enforced shortly after lock in, whereas as 2mb blocks will be a bit farther out to ensure people have plenty of time to upgrade their nodes.”

Bitcoin proponents, who are often very vocal on social media and forums, are still voicing mixed signals when it comes to this compromise. As far as mining support goes, the “intention” to signal the next steps is roughly 84.7 percent at the time of writing.

Segwit2x Beta Released as New UAHF Code Proposal `ABC´ Removes 1MB-Limit
Segwit2x (Intention) signaling is 84.7% on July 1, 2017.

The User Activated Hard Fork Code “Bitcoin ABC” Revealed

Segwit2x Beta Released as New UAHF Code Proposal `ABC´ Removes 1MB-Limit
Bitcoin ABC’s current Github avatar.

At The Future of Bitcoin event in Arnhem, software engineer and the chief developer of the D compiler SDC, Amaury Séchet, revealed “Bitcoin ABC”, an implementation of a UAHF.

Séchet gave the crowd in Arnhem an explanation of the ABC protocol by detailing that it falls in line with Bitmain’s recent contingency plan announcement. However, Bitmain has not officially made any statements concerning endorsement of the Bitcoin ABC project. During the conference, the developer answered questions about the new implementation and revealed it doesn’t support Segwit or Replace By Fee (RBF) components. The fork will also remove the 1MB block size limit and will follow this UAHF spec available for review on Github.      

“This UAHF specification is inspired by the idea of a flag day, but changed to a time-based fork due to miner requests,” explains the UAHF spec. “It should be possible to change easily to a height-based fork – the sense of the requirements would largely stay the same.”

Segwit2x Beta Released as New UAHF Code Proposal `ABC´ Removes 1MB-Limit
Amaury Séchet (Deadalnix) reveals Bitcoin ABC at The Future of Bitcoin event in Arnhem.

Furthermore, the team has revealed its vision of “achievable block sizes over the coming years” which scales upwards of 16MB by August of 2019. Séchet further announced at the conference the project is being helped by a pseudonym programmer named “Ftrader.” The developers have also started a Bitcoin ABC subreddit where Ftrader has been responding to questions and a very basic website as well. The team’s site has the Bitcoin ABC binaries and code available for download.

With the beta code release for Segwit2x, the new UAHF code, and the current user-activated soft fork (UASF) movement there’s a lot to follow this summer in regards to the bitcoin scaling debate and solutions from many development teams. Bitcoin.com will be sure to keep our readers informed every step of the way.

What do you think about the beta release of Segwit2x? What do you think about the UAHF plan? Let us know in the comments below.


Images via Shutterstock, The Future of Bitcoin, and the Bitcoin ABC and Segwit2x Github repos.


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  • CryptoSam

    I am with the miners on this, 2x is a more market based improvement. I want Bitcoin to compete with the market, not end up some “store of value” with stagnated development. It gives the option and not a “mandate” to use unproven side chains to bring transaction speed and capacity to real world market demands.

    I am frankly tired of seeing the market cap being handed on a silver platter for the alt-coins who believe in radical development because that’s what people want. If you cannot buy a cup of coffee with Bitcoin then what is it good for?

    • Dr. Bubó

      OK, but why would you buy a shitty coffee on your only money what would worth double or triple by christmas? Any person with some common sense would rather spend his fiat, not his bitcoin or gold…
      By definition, bitcoin was designed to be a digital gold, not world money. The world with so much debt needs inflation, a deflatory money alone would collapse the world economy really bad.

      • Steffen Sølling

        The value of bitcoin will only continue to rise if bitcoin can be used. Bitcoins value comes from its usefulness. The 1 MB limit degrades the usefulness of bitcoin. Bitcoin was designed to be world money.

        • CryptoSam

          Well said, coders are not the best economists and they should stop pretending to be.

        • Dr. Bubó

          The value of bitcoin will only continue to rise if bitcoin can be used. – True.
          The 1 MB limit degrades the usefulness of bitcoin. – True.
          Bitcoin was designed to be world money. – Not true. Otherwise it wouldn’t have the 1mb limit and the scarcity. Gold has been THE money for centuries, its supply was (and is) in theory unlimited (mines were operating everywhere) but its scarcity always caused problems in the economy (as the economy was expanding more faster than we mined gold). Now we have much-much more debt, we also need much-much more inflation (in other words money supply) to keep the economy going.
          It is basic economy, not rocket science.

  • Monty Kirkman

    Segwit will happen, UASF won’t and the 2mb increase…well don’t hold your breath.

    • JAFO

      Segwit will happen, and everyone will see it failure to add any benefit whatsoever. I for one cannot wait.

      • Monty Kirkman

        lol..yeah right

  • ANNY

    BITCOIN will do more better in the process and after, the end was known from the beginning.

    • JAFO

      word

  • Khurram Javed

    Who will be storing bitcoin as it’s block size increases (exponentially?) overtime? What incentive do the nodes have?
    Segwit will appear to make bitcoin part centralized and part decentralized which is not that appealing either.
    Regarding how bitcoin can be used, I would like to use it for whatever I want not only as a storage of wealth. I’d ideally like to use it to make all purchases because it is superior to other forms of currency

    • Ricky Bickerton

      users do NOT need to store the blockchain, they just install a wallet and any user is good to go. there are also plenty of people out there(i am one of them), that will happily set up expensive nodes if they are needed in future, many getting into btc recently fail to understand how many people out there hold a good few btc that have increased in value dramatically, i am pretty sure everyone who has held at least 100 btc from 2015 or earlier will be more than happy to pay whatever it costs to set up nodes for btc to scale on chain, the btc they hold will depend on it, and the cost will be nothing to the gains they have made, so there is no valid point to the argument that each and every user needs to store the entire blockchain, its just a dumb argument as people dont do that today. There are estimated over 10 million users of bitcoin, yet there are less than 8000 nodes running, you dont need to be a genius to see its an EXTREMELY small number of users that are actually running nodes, nodes should not be cheap to setup imo as they should use decent hardware so they can handle growth which will require more than a raspberry pi or android device, and we cannot let governance be decided by nodes, as it would just mean whoever can afford to setup the most nodes will decide btc’s future, and thats not how it works. The incentive to run an expensive node is quite clear to anyone that has profited from btc and hold btc, “take some of your profits you easily made and setup a SECURE node to protect those assets value” that is enough incentive for any hodler. Final note, as always you totally forgot about Moore’s law.

  • Khurram Javed

    Miners are not coders so shouldn’t coders be debating with coders to come to a solution? It’s like a mechanic arguing with surgeon telling doc what is best surgical procedure? What is going on here?

    • CryptoSam

      Haha, Well then coders should stop trying to be economists. What good is code if you are unable to use it on anything?

      Bitcoin is libertarian capitalism, a bunch of socialist democratic geeks need to stop pretending they understand money and value and build code that works with market conditions. If bitcoin had developed in pace with economic demands we wouldn’t be having ICO’s pulling in hundreds of millions of dollars because people want a technology that they can use today.

    • Ricky Bickerton

      no, its more like a mechanic telling a customer, they should replace their vintage rolls royce engine with a brand new engine pulled from a Skoda that comes out next year, when the customer only come in to fix a puncture.

  • JohnnyAp

    To much talking not enough fuc%_€*÷ coding! Lets do LTC, people are sick of arguments after arguments…… if they want worthless codes on an hard drive to play with let them flap to it.

    Crypto needs to moves faster then ico scammer and token that multiply like rats infecting the primal ideas.Decentralization was the basic supported by a community that works together….. now money is getting everyone apple core to rot.

  • Dr. Bubó

    Every cubic kilometre of sea water has 9kg of gold. Gold is not as scarce as you think. And certanly not capped!!! If population is growing, debt is growing and economy is growing, money supply needs to grow too. Otherwise it will be worse than 2007 and 1929 combined. Give the world a deflatory money and billions will starve, revolutions and wars would come and innocent people will be killed on the streets. Same as Venezuela. Venezuela’s problem is not coming from the inflation, the HYPERinflation is only one sign of the deeper (political) problem.
    You comment represents the general misconceptions and lack of basic financial knowledge. Denying facts and common knowledge is not the way to go. Don’t get me wrong, I also invest in bitcoin. It is good as digital gold. But as world money would be a disaster.
    If you want to reset the world’s finance and do a paradigm shift introducing bitcoin, well, it may be done in a few decades. How? I don’t know. But visit Venezuela first, because that would be the middle term result.

    • Steffen Sølling

      You spread claims but without reasoning. I don’t believe your claims. You have not understood that physical and electronic money printing is a huge and very profitable business for the ones who have a monopoly on printing. To keep their huge profits they spend some of it spreading all sorts of lies about the usefulness of the printing to prevent people from revolting. Every time new money is created all the existing money loses value. It is hidden theft from existing owners of money. Henry Ford said: “It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be a revolution before tomorrow morning.”

      • Dr. Bubó

        “money printing is a huge and very profitable business for the ones who have a monopoly on printing” Same with mining…
        Look, I can’t argue with you if you simply don’t understand the basics and keep repeating the popular bullshit propaganda.
        Imagine if you had a fixed rate mortgage for 30 years. If there is (a little) inflation, you pay a bit less value to your bank every year. But if there is deflation, prices are falling, wages are falling but you pay the same amount to the bank and go bankrupt. Because you would pay more value to the bank every year. More importantly, everybody else and every businesses and government would bankrupt. Like in Venezuela, but for different reasons.
        Since you don’t understand finance, lets put it this way: Ask your girlfriend/wife, if she wants to live her life without sex (deflation). Probably no. Then ask about having sex 1-2 times a week (little inflation). Probably yes. Then ask about 100 times a week, every week regardless of her desires or condition (hyperinflation). Probably no.
        So: deflation is bad, some inflation is good, hyperinflation is bad again. Got it? Probably not. 🙁

        • Steffen Sølling

          “Same with mining…”. Not true. There is no monopoly in mining. Just go ahead and start mining if you want to. Competition keeps profits below those in a monopoly.

          “you simply don’t understand the basics” & “Since you don’t understand finance”. I have a masters degree in finance & accounting. I was among the best students.

          “everybody else and every businesses and government would bankrupt.” Governments and the existing banks will probably go bankrupt because bitcoin provides a lifeline away from the existing fraudulent systems. Normal businesses will not go bankrupt. For them it is just another currency with some new features.

          “But if there is deflation, prices are falling, wages are falling but you pay the same amount to the bank and go bankrupt. Because you would pay more value to the bank every year.” The terms of a bitcoin loan would reflect the different expectations regarding inflation/deflation.

          “life without sex (deflation)” Those two things, (amount of sex and inflation/deflation) have no connection.

          • Dr. Bubó

            “The terms of a bitcoin loan would reflect the different expectations regarding inflation/deflation.” Exactly. But that needs a financial paradigm shift first, pushing the reset button. Now how do you imagine it is going to happen? What happens with the existing debt? If you erase it like Tyler in the Fight Club, you also erase the pensions of every citizen in your country. Have you not heard that the devil is always in the details? Your radical idealism would make the world like Venezuela.
            You don’t understand that money supply has been NEVER constant in the history before. We have been mining gold all the time! That is inflation. Money supply needs to change regarding the economy. The recent problem is, that who makes that decision? Since there are 200 countries around and the first wave of the 2007 crisis came from a small country, Iceland, it is hard to control everything. What a country can control is its money supply. That would be wiped out with the capped bitcoin forever and that would be that kind of real time experiment what I would not like to see. If you know how to make a smooth transition from this system to the other, go ahead and write it down.

    • JAFO

      I do not believe you are a doctor.

      • Dr. Bubó

        No, I work in finance and invest.

        • JAFO

          To understand bitcoin you need a background in finance and be able to write code. You lack the latter.

          • Dr. Bubó

            True, still I can see its flaws. You gonna disagree, but it has 3 problems: limited block size, capped (not just limited) supply and the power of miners, which problem comes from the first 2. The decision making became too political and financial.
            However, none of this to be a real problem if it wants to be digital gold and nothing more. But to became world money, you should eliminate all the 3 problems.
            I would really appreciate if you could detail how I am wrong about it.

          • JAFO

            1) Core/Blockstream are finished and the blocksize wars will end this year. That ship has sailed.
            2) The algorithmic support (it is not capped within our lifetimes) is a good thing as it supplies certainty to the market. You need to do some research on divisibility to get your head around that.
            3) The power of miners is the only way it can work. It is kinda like democratic-capitalism: it is not perfect, but every other solution is worse. However if you think you have a better idea, then go start an alt-coin.

          • Dr. Bubó

            2, is total irrelevant nonsense. I can’t teach you basic economy and history in a comment, i give up. Read my answers to Steffen Sølling

          • JAFO

            Being a graduate of one of the top 20 universities on the planet, I believe my economics knowledge is sound. It is you that misunderstands (2). Maybe you should try that again and do some real research?

          • Dr. Bubó

            deflation nothing has to do to divisibility. your comment was a nonsense, you clearly don’t understand what I was writing about

          • JAFO

            The value of bitcoin will expand as the value of the bitcoin economy expands. Everyone knows bitcoin is a deflationary currency, while some may argue that it is bad, in this situation (where the gov is not doing the printing) it works well. Maybe you should come up with a better supply algorithm and go make an alt-coin?

          • Dr. Bubó

            A deflatory currency eventually will stop being used as money and will become an investment. Same happened with gold. The USD is still based on gold, and in theory you could still pay with it. However, people rather keep it, so in practice it stopped being functioning as money and became an investment many decades ago.
            The question is still the same: digital gold or world money? Cant get both. In the first case, bitcoin is good as it is, we can increase the block size once in a while but thats it. It will remain as the queen of cc, the hallway of digital money, the one and only, which would have a psychological,sentimental value, good investment, collectors item. In the latter, we should remove the supply cap, speed up transactions etc. But even if you code 3-5% inflation into it, still brings many problems and a dangerous experiment. As everything in life, economy is cyclical, too. Good times, bad times, good times, bad times. Money supply needs to be adjusted to that. Money supply NEVER been static in the history and inflation NEVER been static. Population, growth, greed (apetite for risk), investment volume, employment, interest rates, wars etc. are all changing factors. If you could answer all those financial issues with a capped or invariably inflated money you would win a Nobel prize.
            Not surprisingly, the problem of the fiat currencies has been already solved by technology. We could fire all idiot central bankers and put an algorithm in there to control money supply as needed. Its just not gonna happen.

          • JAFO

            “A deflationary currency eventually will stop being used as money…” Lol, that has never happened in the history of mankind.

            Gold stopped being money when governments broke the gold standard, and they only did that cause they could not print gold. Inflationary printing of money by government has become the standard now, and that will not end well. The gold standard worked pretty well when it was in use, except for the fact that governments did not have control of the supply. Bitcoins model is close enough to that to work as well.

          • Dr. Bubó

            You are wrong in every sentence. I would suggest some more research in the matter.

          • Taiwoo

            I don’t see gold (“deflationary currency”) being used as money in everyday transactions. So I think Bubó has a valid point!

          • JAFO

            Actually I should have quoted more of what he said. So I fixed it for you…

        • NAIJABOY

          this all boils down to adoption. Dr. Bubó, if you where paid a salary in bitcoins would you convert it to fiat just to spend??

          • Dr. Bubó

            That question nothing has to do bitcoin’s ability to become world money as it is now. I buy bitcoin, but I don’t spend it, because I have no reason to do so. I believe that not many people would want to spend a money what increase in value every day. Because that is what deflation means…
            I can’t argue with you guys because you all think that bankers are evil reptiles from an other planet wanting to enslave us trough inflation. No, sorry, the world is a bit more complicated than that.

          • NAIJABOY

            Wrong answer

          • Dr. Bubó

            Good argument.
            As expected.

  • bt

    I’m excited to see where the lightning network will take us. Bigger blocks won’t get us there fast enough, even without the huge risk of centralization they’d cause.

  • CryptoSam

    You should sell your bitcoin and buy trading cards, they store value and you cannot use them anywhere. They are more suited to your philosophy. Oh and read more books on economics.

  • Dr. Bubó

    Nice piece of propaganda, I even agree with most of it, but you failed to answer my question and detail HOW you think it could happen.
    You also fail to realise that I am not an enemy to bitcoin. My argument is that to be digital gold and world money are two very different functions and we can’t have both at the same time.
    Your argument seems to be this: for the thousands of years we used gold for money, all problem came from the fact that we kept mining gold, causing inflation. So, you say, the solution to all money problem would have been to shut down every gold mine and cap the money supply. In other words, you solve the money problem by providing less money to people. You want to drive your car faster by taking your foot off the accelerator. I’ve never heard such a nonsense stupidity and yes, I am 100% sure it would be a disaster. Please read some about deflation before you answer.

    • Steffen Sølling

      “you failed to answer my question and detail HOW you think it could happen.”

      More and more people will use bitcoin (when the cap is removed) and eventually bitcoin becomes the normal money. Similar to how the world transitioned from using
      1) physical letters to using email, Facebook and other electronic communication
      2) physical newspapers to using electronic news channels
      3) typewriters to using word processing software.

      Adoption grew and grew and eventually the old ways had lost their importance.

      “Your argument seems to be this: … ”
      The way you portray my argument is not true.

      • Dr. Bubó

        Is the cap to be removed???

  • King Zaki

    I thought that those Bitcoin visa cards like Monaco let you spend your Bitcoin in fiat value.