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  • Be careful with cross-chain atomic swaps! I've found a (fixable) exploit in the most common implementation (OP_HASH160 <hash> OP_EQUALVERIFY)
    by /u/markblundeberg on February 19, 2018 at 3:56 am

    Hash locked atomic swaps are a fantastic idea, allowing two parties to exchange distinct cryptocurrencies without having to trust each other. It involves a careful dance of "I'll let you take my funds but in doing so you have to reveal a secret that lets me take your funds." However, I've recently discovered that the most common implementation of smart contracts for atomic swap typically has a subtle bug involving incompatible secret sizes between different cryptocurrency scripting languages. It therefore affects some trading pairs (BTC <-> ETH) but not others (BTC <-> LTC). The bug allows one party to steal the funds of the other, without risk. All details here, including a simple fix: I've only been into crypto for a few months and I've taken a liking to Bitcoin Cash and r/btc, and I think you guys deserve a warning. Feel free to spread it around! Cheers, -Mark PS: I have another idea I'm writing up that should ease the risk of instantly accepting unconfirmed payments. Like GreenAddress but better. Keep an eye out for my next post, in the next couple days! submitted by /u/markblundeberg [link] [comments […]

  • Yoshitaka Kitao, Representative Director, President & CEO of SBI Holdings: "Japan’s SBI Group Mining Bitcoin Cash Now"
    by /u/rdar1999 on February 19, 2018 at 3:50 am

    submitted by /u/rdar1999 [link] [comments […]

  • Lightning Network scalabity woes
    by /u/democracy101 on February 19, 2018 at 1:56 am

    submitted by /u/democracy101 [link] [comments […]

  • Jeff Berwick Anarchopulco Must Watch
    by /u/Chris_Pacia on February 19, 2018 at 1:54 am

    submitted by /u/Chris_Pacia [link] [comments […]

  • Sneak Peak at 'Bitcoin Cash MiniPOS Server'... Merchants can soon accept in-store 0 confirmation BCH payments processed in under 30 seconds.
    by /u/howelzy on February 19, 2018 at 1:06 am

    submitted by /u/howelzy [link] [comments […]

  • Laughed at this for 5 minutes straight and I'm still determining whether it was actually funny or not.
    by /u/JustRedditThat on February 19, 2018 at 12:58 am

    submitted by /u/JustRedditThat [link] [comments […]

  • Core Shill Gets Boo'ed Off By Audience at Anarchapulco (go to 28:30 for question that sparks it)
    by /u/majorpaynei86 on February 19, 2018 at 12:47 am

    submitted by /u/majorpaynei86 [link] [comments […]

  • Here is a video of AA admitting that LN nodes/hubs can be hacked and users' funds stolen, yet this crook turns it around to say that this security flaw is good because it will encourage decentralisation. AA is 100% corrupt
    by /u/geekmonk on February 18, 2018 at 11:42 pm

    submitted by /u/geekmonk [link] [comments […]

  • Name-calling Bitcoin Cash as "BCash" or "BTrash" (I recommend pasting the link to this video as the sole response to anyone you see who indulges in such behavior)
    by /u/BitcoinIsTehFuture on February 18, 2018 at 10:56 pm

    submitted by /u/BitcoinIsTehFuture [link] [comments […]

  • There's no such thing as mistakes, just happy little corrections.
    by /u/SerentiveCapital on February 18, 2018 at 10:43 pm

    submitted by /u/SerentiveCapital [link] [comments […]

  • One of biggest bitcoin companies is now an enemy of bitcoin! Unbelievable.
    by /u/bambarasta on February 18, 2018 at 10:38 pm

    Bitcoin now wants to make Bitpay their enemy. Fuck adoption. Fuck what Bitpay did to get bitcoin mainstream. Propaganda in all its glory. submitted by /u/bambarasta [link] [comments […]

  • Reporting live from Anarchapulco, BCH-dev Amaury Sechet: 'BTC is bitcoin-quota'
    by /u/Anen-o-me on February 18, 2018 at 10:29 pm

    Amaury explained why BTC is expensive, slow, and unreliable because the 1mb block size creates a quota limit on transactions. He and some others decided to fork away from BTC last August to keep bitcoin cheap, fast, and reliable by eliminating the quota. We don't want a system that works one month and doesn't work the next month. The transaction fee goes down because nobody is using it? That's not what you want. We can do Visa-level transactions with a mid-grade computer. Sure at some point on-chain may run out of ability to scale, but we have plenty of time to deploy multiple solutions until that happens, and he says he wants to deploy all of them. He says lightning is still being developed. Now the few Core-partisans are lining up to ask questions. Some asking about centralization caused by larger block size. Another question about energy use of bitcoin. "Gigabyte blocks are not that big. US and Canada internet sucks. In Europe and much of the world we have cheap gigabit connections." One guy is asking people to call BTC as "bitcoin-core," not just "bitcoin." Questiner says BCH has multiple devs, is that really centralized when BTC has just one dev group, Core? Amaury is explaining how BCH dev is significantly decentralized and competitive. If the bitcoincash-ABC wallet starts falling behind, others will gain market share. Core-guy is asking about about BCH malleability. Amaury: we have fixed 3rd party malleability, he has a general fix in mind and hopes to deploy it in the November BCH fork, but he has to convince others too, it's not up to him. Guy asking about transaction times of 10 minutes, how can a merchant take instant payments? (Basic bitch question) Amaury: we removed the transaction with highest fee being the preferred transaction (RBF) and nodes will generally choose the first seen transaction. So it works now but not perfectly. For point of sale transactions the ideal transaction time is like 3-5 seconds max. We have some ideas in mind to make that possible with high security but he not ready to talk about it. That's about it. I couldn't record everything! Hopefully Amaury's talk will be made available for free online sometime soon. Consider attending Anarchapulco next year! There're 1600 anarchists and ancaps here this year, up from 600 last year. Everyone here loves bitcoincash, there's only a few unenlightened Core partisans here. And Acapulco is lovely. And I got to meet Roger Ver as well as many other libertarian heroes. Ron Paul spoke last night to rapturous applause and endorsed crypto tech. And my personal favorite, Larken Rose. Later guys, stay encrypted! submitted by /u/Anen-o-me [link] [comments […]

  • First GitHub Bitcoin Cash bounty claimed that wasn't posted by myself!
    by /u/Tibanne on February 18, 2018 at 10:09 pm

    submitted by /u/Tibanne [link] [comments […]

  • Athena Bitcoin Integrates Bitcoin Cash Support for All Its ATMs
    by /u/BobsBurgers3Bitcoin on February 18, 2018 at 8:19 pm

    submitted by /u/BobsBurgers3Bitcoin [link] [comments […]

  • Shower thought: the worst thing that could happen to BTC right now is if people start actually using crypto and not only speculating...
    by /u/unitedstatian on February 18, 2018 at 8:09 pm

    submitted by /u/unitedstatian [link] [comments […]

  • Roger Speech at Anarchopulco
    by /u/Chris_Pacia on February 18, 2018 at 7:46 pm

    submitted by /u/Chris_Pacia [link] [comments […]

  • Wyoming Bill Would Exempt Cryptocurrency from Property Taxes; Encourage Use and Help Undermine Federal Reserve Monopoly on Money
    by /u/democracy101 on February 18, 2018 at 6:29 pm

    submitted by /u/democracy101 [link] [comments […]

  • Gambling tycoon builds $100m bitcoin-funded Antiguan resort | Technology
    by /u/unitedstatian on February 18, 2018 at 6:29 pm

    submitted by /u/unitedstatian [link] [comments […]

  • We need more people like Vitallik Buterin, he doesn't try to inflate the price at all cost like some do.
    by /u/unitedstatian on February 18, 2018 at 5:31 pm

    submitted by /u/unitedstatian [link] [comments […]

  • Rick Falkvinge on the Lightning Network: Requirement to have private keys online, routing doesn't work, legal liability for nodes, and reactive mesh security doesn't work
    by /u/Falkvinge on February 18, 2018 at 5:06 pm

    submitted by /u/Falkvinge [link] [comments […]

  • Edge Wallet is Live! (Support for BTC and BCH, plus many others)
    by /u/Rassah on February 18, 2018 at 4:59 pm

    submitted by /u/Rassah [link] [comments […]

  • The search continues
    by /u/Sloop_man on February 18, 2018 at 4:46 pm

    submitted by /u/Sloop_man [link] [comments […]

  • Bitcoin (BCH) vs Bitcoin Core (BTC) Fees
    by /u/Egon_1 on February 18, 2018 at 1:40 pm

    submitted by /u/Egon_1 [link] [comments […]

  • The reason why BTC supporters get so emotional in the debate is because they can't rationally argue their fork is the real bitcoin when technically speaking it's transforming BTC into an altcoin which shares only the ledger with the original bitcoin.
    by /u/unitedstatian on February 18, 2018 at 1:18 pm

    submitted by /u/unitedstatian [link] [comments […]

  • Coinbase’s PayPal Like Plugin Integrates With Shopify, Allowing Two Minutes Set Up For Merchants to Accept Ethereum, Bitcoin, Bitcoin Cash and Litecoin
    by /u/PM_UR_TITS_SILLYGIRL on February 18, 2018 at 8:05 am

    submitted by /u/PM_UR_TITS_SILLYGIRL [link] [comments […]

  • Please read our Frequently Asked Questions (FAQ)
    by /u/BitcoinXio on March 1, 2017 at 4:33 pm

    This FAQ thread serves to inform both new and existing users about common Bitcoin issues, complaints, and comments that readers coming to this Bitcoin subreddit may have. This is a living and breathing document, which will change over time. If you have suggestions on how to change it, please comment below or message the mods. What is /r/btc? Bitcoin is commonly abbreviated as BTC, hence the name. The /r/btc reddit community was originally created as a community to discuss bitcoin. It quickly gained momentum in August 2015 when the bitcoin block size debate heightened. On the legacy /r/bitcoin subreddit it was discovered that moderators were heavily censoring discussions that were not inline with their own opinions. Once realized, the subreddit subscribers began to openly question the censorship which led to thousands of redditors being banned from the /r/bitcoin subreddit. A large number of redditors switched to other subreddits such as /r/bitcoin_uncensored and /r/btc. For a run-down on the history of censorship, please read A (brief and incomplete) history of censorship in /r/bitcoin by John Blocke and /r/Bitcoin Censorship, Revisted by John Blocke. Update October 2017: As yet another example, /r/bitcoin censored 5,683 posts and comments just in the month of September 2017 alone. This shows the sheer magnitude of censorship that is happening. Read a synopsis of /r/bitcoin to get the full story and a complete understanding of why people are so upset with /r/bitcoin's censorship. Why is censorship bad for Bitcoin? As demonstrated above, censorship has become prevalent in almost all of the major Bitcoin communication channels. The impacts of censorship in Bitcoin are very real. "Censorship can really hinder a society if it is bad enough. Because media is such a large part of people’s lives today and it is the source of basically all information, if the information is not being given in full or truthfully then the society is left uneducated [...] Censorship is probably the number one way to lower people’s right to freedom of speech." By censoring certain topics and specific words, people in these Bitcoin communication channels are literally being brain washed into thinking a certain way, molding the reader in a way that they desire; this has a lasting impact especially on users who are new to Bitcoin. Censoring in Bitcoin is the direct opposite of what the spirit of Bitcoin is, and should be condemned anytime it occurs. Also, it's important to think critically, and have an open mind. What is the goal of /r/btc? This subreddit is a diverse community dedicated to the success of bitcoin. /r/btc honors the spirit and nature of Bitcoin being a place for open and free discussion about Bitcoin without the interference of moderators. Subscribers at anytime can look at and review the public moderator logs. This subreddit does have rules as mandated by reddit that we must follow plus a couple of rules of our own. Make sure to read the /r/btc wiki for more information and resources about this subreddit which includes information such as the benefits of Bitcoin, how to get started with Bitcoin, and more. What is Bitcoin? Bitcoin is a digital currency, also called a virtual currency, which can be transacted for a low-cost nearly instantly from anywhere in the world. Bitcoin also powers the blockchain, which is a public immutable and decentralized global ledger. Unlike traditional currencies such as dollars, bitcoins are issued and managed without the need for any central authority whatsoever. There is no government, company, or bank in charge of bitcoin. As such, it is more resistant to wild inflation and corrupt banks. With bitcoin, you can be your own bank. Read the Bitcoin whitepaper to further understand the schematics of how Bitcoin works. You can download a Bitcoin client to start fully using Bitcoin today; note that it takes time to sync full clients, which can take anywhere from 7 hours to over 24 hours for the initial blockchain download depending on your hardware and bandwidth. How do I buy Bitcoin? You can buy Bitcoin on an exchange or with a brokerage. If you're looking to buy Bitcoin with your credit card you can simply visit this buy Bitcoin link to get started quickly and safely. There are several others places to buy Bitcoin too; please check the sidebar under brokers, exchanges, and trading for other go-to service providers to begin buying and trading Bitcoin. Make sure to do your homework first before choosing an exchange to ensure you are choosing the right one for you. How do I store my Bitcoin securely? After the initial step of buying your first Bitcoin, you will need a Bitcoin wallet to secure your bitcoin. Knowing which Bitcoin wallet to choose is the second most important step in becoming a Bitcoin user. Since you are investing funds into Bitcoin, choosing the right Bitcoin wallet for you is a critical step that shouldn’t be taken lightly. Use this guide to help you choose the right wallet for you. Check the sidebar under Bitcoin wallets to get started and find a wallet that you can store your Bitcoin in. Why is my transaction taking so long to process? Bitcoin transactions typically confirm in ~10 minutes. A confirmation means that the Bitcoin transaction has been verified by the network through the process known as mining. Once a transaction is confirmed, it cannot be reversed or double spent. Transactions are included in blocks. Over the past year, the Bitcoin network has hit its maximum capacity of 1MB of available transaction space (block size limit) causing fees to rise and block confirmations to slow. If you have sent out a Bitcoin transaction and it’s delayed, chances are the fee you used wasn’t enough to out-compete others causing it to be backlogged. The transaction won’t confirm until it clears the backlog. To help with this as a temporary solution, you can check fee estimator services to help you figure out the right fee to pay or use a transaction accelerator service to help get an already broadcast transaction mined and confirmed. Why does my transaction cost so much, I thought Bitcoin was supposed to be cheap? As described above, transaction fees have spiked in the past year mainly due to a limit on transaction space. This has created what is called a fee market, which has primarily been a premature artificially induced price increase on transaction fees due to the limited amount of block space available (supply vs. demand). The original plan was for fees to help secure the network when the block reward decreased and eventually stopped, but the plan was not to reach that point until some time in the future, around the year 2140. What is the block size limit? The original Bitcoin client didn’t have a block size cap, however was limited to 32MB due to the Bitcoin protocol message size constraint. However, in July 2010 Bitcoin’s creator Satoshi Nakamoto introduced a temporary 1MB limit as an anti-DDoS measure. The temporary measure from Satoshi Nakamoto was made clear three months later when Satoshi said the block size limit can be increased again by phasing it in when it’s needed (when the demand arises). When introducing Bitcoin on the cryptography mailing list in 2008, Satoshi said that scaling to Visa levels “would probably not seem like a big deal.” How can the block size be increased to accommodate more transactions? There have been many discussions and proposals to increase the block size over the past couple of years, so far without any success. The most recent way introduced by a group of developers has been through a new client called Bitcoin Unlimited (BU), which removes the temporary limit like the original client and lets the free market decide what block size is best, allowing for on-chain scaling. The BU plan is to accomplish this via a hard fork. Another recent alternative has been Segregated Witness (SegWit), which only allows a limited amount more of transactions through a signature optimization, removing signature data from conventional transactions and placing it into a new space, called the transaction witness. SegWit has been deployed as a soft fork (but not active), although it could also be implemented as a hard fork. What is a hard fork? A hard fork is when a block is broadcast under a new and different set of protocol rules which is accepted by nodes that have upgraded to support the new protocol. In this case, Bitcoin diverges from a single blockchain to two separate blockchains (a majority chain and a minority chain). Some argue that having two chains is problematic, but that is only the case if you believe that the minority chain will survive and have more market value than the majority chain. Read more about hard forks in our Hard Fork mega thread. What is a soft fork? A soft fork is when a block is broadcast under a new and different set of protocol rules, but the difference is that nodes don’t realize the rules have changed, and continue to accept blocks created by the newer nodes. Some argue that soft forks are bad because they trick old-unupdated nodes into believing transactions are valid, when they may not actually be valid. Doesn't it hurt decentralization if we increase the block size? Some argue that by lifting the limit on transaction space, that the cost of validating transactions on individual nodes will increase to the point where people will not be able to run nodes individually, giving way to centralization. This is a false dilemma because at this time there is no proven metric to quantify decentralization; although it has been shown that the current level of decentralization will remain with or without a block size increase. It's a logical fallacy to believe that decentralization only exists when you have people all over the world running full nodes. The reality is that only people with the income to sustain running a full node (even at 1MB) will be doing it. So whether it's 1MB, 2MB, or 4MB, the costs of doing business is negligible for the people who can already do it. If the block size limit is removed, this will also allow for more users worldwide to use and transact introducing the likelihood of having more individual node operators. Decentralization is not a metric, it's a direction. This is a good video describing the direction of how decentralization should look. Additionally, the effects of increasing the block capacity beyond 1MB has been studied with results showing that up to 4MB is safe and will not hurt decentralization (Cornell paper, PDF). Other papers also show that no block size limit is safe (Peter Rizun, PDF). Lastly, through an informal survey among all top Bitcoin miners, many agreed that a block size increase between 2-4MB is acceptable. What is the block size debate all about anyways? The block size debate boils down to different sets of users who are trying to come to consensus on the best way to scale Bitcoin for growth and success. Scaling Bitcoin has actually been a topic of discussion since Bitcoin was first released in 2008; for example you can read how Satoshi Nakamoto was asked about scaling here and how he thought at the time it would be addressed. Fortunately Bitcoin has seen tremendous growth and by the year 2013, scaling Bitcoin had became a hot topic. For a run down on the history of scaling and how we got to where we are today, see the Block size limit debate history lesson post. What is Bitcoin Cash? This is a question we are seeing a lot of since Bitcoin hard forked on August 1, 2017. Bitcoin Cash (symbol: BCH) is just a newer version of Bitcoin that split in August in attempt to solve the scaling problems that have been plaguing Bitcoin for years. At it's core Bitcoin Cash is just a continuation of the Bitcoin project that allows for bigger blocks which will give way to more growth and adoption. You can read more about Bitcoin Cash in this mega thread or learn the difference between legacy Bitcoin and Bitcoin Cash. What is SegWit2x? Called SegWit2X, the upgrade plan calls for a very specific fork (or a change to Bitcoin's rules), one that would make certain rules valid that weren't valid before. Specifically, Segwit2x would change the size of the blocks passed regularly around the network and stored in the blockchain from 1 MB to 2 MB to allow for more onchain capacity and growth. The SegWit2X announcement explains the upgrade to 2MB was first discussed at the ‘Hong Kong Roundtable Agreement’, and had further solidified at the ‘New York Agreement’ (NYA) this year at the Consensus conference. Both agreements involved implementing SegWit first and a block size increase from 1MB to 2MB later. "The November 2017 upgrade to 2MB blocks is a hard-fork, but necessary changes are trivial to perform," explains the Segwit2x working group’s announcement. The targeted hard fork date is set to trigger on block height 494784, which is estimated to happen on or around November 16, 2017. Please read the SegWit2X readiness checklist for more details and information about compatible clients. What now? Bitcoin is a fluid ever changing system. If you want to keep up with Bitcoin, we suggest that you subscribe to /r/btc and stay in the loop here, as well as other places to get a healthy dose of perspective from different sources. Also, check the sidebar for additional resources. Have more questions? Submit a post and ask your peers for help! submitted by /u/BitcoinXio [link] [comments […]


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