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Miners of bitcoin, the conglomerate of operators that secure the block chain, have indicated that they will update the code for 269 blocks in the indicated period, ensuring that the software goes one step further to change its structure and make more transactions. If we go back the consensus found miners who agreed to cement the first part of a major effort to update Bitcoin, called Segwit2x. Up to 90 percent of all hash power confirmed support for this Soft fork, implying that miners activated the Segregated Witness (SegWit). It is understood, so that the BIP 148 became obsolete and on August 1 there is no change or event. But the SegWit is not a fact yet, particularly at a technical level.


The scenario
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<center> https://fs.bitcoinmagazine.com/img/images/BIP91.width-800.jpg </center>

[source](https://bitcoinmagazine.com/articles/bip-91-has-activated-heres-what-means-and-what-it-does-not/)

The BIP 91 is a proposal for the correction or improvement of Bitcoin proposed by Bitmain Engineer James Hilliard. It is linked to the New York Consensus and backed by a number of Bitcoin companies and mining groups. It is also compatible with BIP 148, which is another strategy to indirectly activate the BIP threshold 141. In fact you could consider BIP 91 as a Soft fork

The controversial proposal seeks to change the network's transaction structure through Segregated Witness (SegWit), and increase a limit on the amount of data that can be stored in transaction blocks, a measure tentatively scheduled on Autumn.
In this statement, the mining conglomerates joined almost unanimously in favor of the proposal, and the BIP 91 designed in part to prevent a possible split of Bitcoin in the network, emerged as the first important step to follow in the road map. As a result, Bitcoin saw a strong price increase on Thursday due to the perception of progress, with some calling the lock-in (BIP 91) a victory that marks a "new dawn" for this pioneering cryptocurrency. But, this Block in is only the first step to activate SegWit on the network, and come a series of stages of greater complexity.

The stages summarized
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* There will be a "grace period" in 336 blocks, which will take approximately two and a half days, during which the miners will have time to prepare for the activation.

* The BIP 91 will activate in block 477.120 and, theoretically, the mining conglomerates will begin to reject blocks that do not show support for SegWit (BIP 141). In this way, BIP 91 is a "coordination mechanism" that causes other mining groups to continue or lose mining benefits.

* SegWit could be closed-enabled during the next difficulty setting period of 2016 blocks, which takes about two weeks.

Finally, it will be said that the activation of the Segwit will be "strong and clear", as the creator of BIP 91, James Hilliard said.

It is then that Bitcoin's SegWit update will be official, and the user-activated Sof fork (UASF) BIP 148 would be replaced.

                  POSSIBLE PROBLEMS

Some members of the community, including respected Bitcoin developers and mining conglomerate operators, are raising concerns about possible errors between SegWit and BIP 91 at the time of their activation.

These concerns are reduced to:

* The automated or "thinking" miners may not be running the software that is indicated. If there are many mining groups - more than 50% - they are not running the software, it could affect the activation of SegWit.

* There could be speculation: mining conglomerates can run the right software for a while, then stop before SegWit comes on.

* In simple terms, some Bitcoin users do not trust  others (those who handle the technical aspect)

What opinions do you have about this ?

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