BIP91 vs August 1st

BIP91 reaches 80.5% network support
19 July 2017   4575

Is the first decentralized peer-to-peer payment network that is powered by its users with no central authority or middlemen

Bitcoin community has lost sleep for a couple of months over SegWit2x and the Bitcoin User Activated Soft Fork (UASF) which is to be activated on August the 1st.

Now, while a significant part of users is concerned about a possible hardfork in the Bitcoin network, the miners begin to vote for BIP91 proposal as it is considered to have good chances to become an unexpected compromise solution in the debate on consensus.

In fact, it is the only proposal actively preventing a Bitcoin chain split right now. The bigger question is whether or not BIP91 can gain enough traction in the coming days.


Distributed database that is used to maintain a continuously growing list of records, called blocks

The support for BIP91 is certainly on the rise. Various mining pools are actively signaling support for this solution right now: 80.5% of blocks mined over the past 24 hours support this solution. It goes without saying that scaling Bitcoin without a chain split should be in everybody’s best interest.

Bitcoin voting chart on Bitcoin voting chart on

Why BIP91?

The implementation of softfork in the Bitcoin network requires miners to include a special signal bit into the blocks, thereby showing their willingness to adopt the new rules. The original version of Segwit2x required the inclusion of the fourth signal bit (bit 4) in order to support BIP141, and that's when the conflict appeared, because the BIP141 code had been already written to respond to the first signal bit (bit 1).

To bypass this conflict, BIP91 uses an additional bit signaling the mandatory acceptance of the original first signal bit. Accordingly, there is no need to change the already existing SegWit activation logic.

Thus, if BIP91 to be activated before July 31th, it will replace BIP148, which also assumes the activation of SegWit, but carries the risk of splitting the Bitcoin network into several blockchains.

However, if one big mining pool stops signaling it, BIP91 will be back below 80% pretty quickly. Given that some pools like to play games with the rest of the Bitcoin community, BIP91 may never happen in the end. After all, there are less than two weeks to see it get locked in, which means time is of the essence.

Sparkpool to Freeze $300k Reward

As reported, pool suggests that such a high commission could have been paid by someone in error and is considering the possibility of a refund
20 February 2019   68

The Sparkpool mining pool decided to freeze the remuneration in the amount of 2,103,1485 for the extraction of block # 7,238,290. The management of the organization suggests that such a high commission could have been paid by someone in error and is considering the possibility of a refund, CoinDesk reports.

The head of the Sparkpool Xin Xu argues that users of the pool understand and agree with the decision, given the size of the amount involved.

Unfortunately, and fortunately, blockchain is so far not completely run by machines; human are still involved. So we have an opportunity to correct the problem. Integrity is our pool’s priority.

Xin Xu

CEO, Sparkpool

While some users suggested that a large commission was paid by mistake, others admitted that this could be a goodwill gesture from an anonymous donor to the community of the miner or even an attempt to launder money through the blockchain cryptocurrency.