It seems like the Bitcoin market and industry are rejecting Bitcoin Unlimited almost unanimously for the same reason: security and decentralization.Even miners are making the move to Segregated Witness, including the world’s largest Bitcoin miner and leading Blockchain company Bitfury.Bitfury is in support of SegWit.On March 26, Bitfury mined its first SegWit block with Bitcoin Improvement Proposal (BIP) 148 that contains the SegWit signal tag.BIP 148 is a proposal entitled “Mandatory activation of segwit deployment” released on March 12 introduced for miners as a way to signal their support for SegWit.Shaolin Fry, the author of BIP 148, explained: “Segwit increases the blocksize, fixes transaction malleability, and makes scripting easier to upgrade as well as bringing many other benefits.It is hoped that miners will respond to this BIP by activating Segwit early, before this BIP takes effect.Otherwise this BIP will cause the mandatory activation of the existing segwit deployment before the end of midnight November 15th 2017.” Shortly after the SegWit (BIP 148) block was mined by Bitfury, Bitcoin India mined block 458716 containing the same tag, also signaling support for SegWit.

Previously, Bitcoin Unlimited supporters noted that businesses and users are in favor of SegWit because the solution doesn’t affect their profitability and revenues and that the miners are in support of Bitcoin Unlimited as the software guarantees high profitability for miners.litecoin mining javascriptHowever, this reasoning is starting to be questioned by some of the largest mining pools in the market, including Bitfury and Bitcoin India.c4 bitcoin certificationBitfury is in support of SegWit for many reasons, like every other SegWit supporting organization across the market.litecoin affiliateHowever, since mid last year, Bitfury has continued to emphasize the importance of off-chain scaling and two-layer solutions such as Lightning.bitcoin danske kroner

Also, Bitfury executives including the company’s Chief Information Officer (CIO) Alex Petrov have released various reports and test results of SegWit, as shown in Whale Panda's blog post.bitcoin bovadaAlmost every business and platform operator within Bitcoin have rejected Bitcoin Unlimited due to security and decentralization issues.bitcoin hardware swedenSpecifically, prominent Bitcoin wallet platform Armory’s lead developer Andrew Chow, better known as Goatpig, stated that Armory doesn’t approve Bitcoin Unlimited’s philosophy on allowing miners to vote whichever block size best suits the Bitcoin Blockchain.“I disagree with BU's primary principle that the block size should be decided by user and miner vote.I disagree with the block size hard cap on the grounds that it is a magic number.Voting on a magic number does not improve upon this limitation.

The only acceptable solution in my eyes is an algorithmic one.To imagine a technical metric is best discovered by popular vote is wishful thinking at best.” More to that, a more obvious issue is that the Bitcoin Unlimited hard fork is contentious and dangerous in nature, as it will inevitably lead to a split chain if it is ever forked.Recently there has been much debate in the Bitcoin community regarding Segregated Witness, hard forks and soft forks, and the usage of alternative node and mining software.The Armory developers (goatpig, droark, and achow101) support Segregated Witness as is in its current form, and also support Bitcoin Core.The Armory developers also oppose hard forks that may attack the original chain.Should a long-lasting hard fork that does not attack the original chain exist, we would consider implementing functionality required to allow Armory users to transact on that chain only if absolutely necessary (e.g.the transaction format for that chain is changed).Depending on how drastic the changes are, we may implement the change fully, implement a migration tool to another wallet that supports the change, or simply not support the fork at all.

Although the Armory developers do not support malicious hard forks and may not support a non-malicious hard fork, the Armory wallet software does not perform any consensus checks as it relies on its connection to a local Bitcoin node.This node is typically Bitcoin Core, but anything based upon Core, including Bitcoin Unlimited, will work so long as no changes are made to the transaction or block formats.So long as both formats do not change, Armory should be compatible with the hard fork and will allow users to continue to transact on the forked network.Because transactions for both the forked and the original networks will primarily be valid on both networks, there is the risk for replay attacks to occur and for the loss of coins due to transaction replay.The following will help users avoid transaction replay should Bitcoin Unlimited or another similar block size increase hard fork proposal be activated.However, this procedure is not necessarily guaranteed to work and assumes that the forked chain will have significantly lower transaction fees than the original chain.

Should a chain fork occur, more up-to-date information about what Armory users can do will be posted on the Armory forums and on this website.The Armory database engine builds off of on-disk blockchain data and does not enforce consensus rules.In other words, any client that uses the same block data format and magic word as Bitcoin Core is compatible with Armory.From your perspective, running Armory against the BU chain will show you your BU balance, and vice versa.In practice, this means that to be able to interchange seamlessly between your Core and BU transaction history, you need 2 copies of the blockchain data; one for the Core chain and one for the BU chain.The same goes with the Armory database, as it is intimately tied to the underlying block data.You do not need to rescan the pre-fork BU chain to get a copy of the pre-fork Core database to work off of the pre-fork BU chain.However, to be absolutely safe, you should use Armory’s Rebuild and Rescan Databases feature to update both databases after the fork.

In addition, it may be necessary to fully re-download the blockchain if the blockchain and database copies are made post-fork.You can swap between the two by pointing Armory to the relevant pair of block data folder and database folder by using the --satoshi-datadir and --dbdir command line options respectively.A transaction replay attack is where one transaction can end up confirmed in both blockchains, thus resulting in coins on one chain being spent when you did not want those to be spent.This can happen either accidentally or intentionally due to someone broadcasting your transaction on both networks.In order to avoid transaction replay, you must “taint” your coins; you want to get a transaction on one chain that is not valid on the other.Once you have that, you can mix all of your remaining coins with the “tainted” output to the same effect.At this point none of your unspent transaction outputs (UTXOs) on one chain are valid on the other, which guarantees that your transactions are immune to transaction replay attacks.

Tainting on BU is actually fairly easy.They want to increase the block size limit and reduce tx fees.At the same time, the departure of hash power from the main chain will result in slower Core blocks and thus less capacity and higher fees.Hence, the simplest way to taint on BU is this: Create a transaction sending coins back to yourself, with a fee low enough such that it will quickly confirm on BU and will probably not confirm quickly on Core.Once the transaction is mined on BU, RBF the underlying output on the Core chain with a sufficiently high fee.This transaction can only be mined on Core now since it is invalid on BU (to which the transaction appears as a double spend).Once your RBF transaction receives enough confirmations on the Core side – six should be sufficient – you will have a UTXO exclusive to the BU chain and a UTXO exclusive the Core chain.You are now safe to taint the rest of your coins on each chain, keeping in mind that untainted coins remain valid on both chains.