Unintentional fork appears in Segwit2x's chain

Segwit2x has experienced a fork in its blockchain causing the full stop in the process of the creation of new blocks for about twenty hours
12 July 2017   981
Bitcoin

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

Segiwt2x, software behind an agreement of 80% of the mining hashrate and some major bitcoin companies, launched a separate testnet several weeks ago in order to provide an environment in which this new piece of software can be developed and see what potential effects it would have on the real Bitcoin network. The testnet is a completely separate blockchain, with separate miners, separate coins, separate nodes, and most importantly, separate consensus rules that decide whether or not a block is valid.

The accidental fork thing occurred on Monday, July 10. It caused the network to essentially go down for almost a full day along with creating two incompatible testnets. Apparently, not a single block was created during this period as developers rushed to find the cause and to work out a solution to the problem.

Blockchain

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

As it turned out, the reason for the fork was that when the chain hit a certain block number, the first block that began the chain allowing for 2MB blocks needed to be over 1MB. Since it is a testnet and lacks a real user base, the mempool was essentially empty. There weren’t enough transactions being made to add up to greater than 1MB, causing the fork.

Although unexpected timing, this is otherwise a good field test.
 

Jeff Garzik
The leader of the Segiwt2x team

In a message on the Segwit2x working group mailing list, the leader of the team Jeff Garzik reported that the fork is a result of a testnet miner activating the fork without the preparation needed from the rest of the people on the testnet. While it is obviously a problem that needs to be fixed, developers argue that the point of the testnet is to test new software.

Experts are also concerned about the problem, assuming that the fork could affect the outcome of the vote. If the number of miners decreases, the implementation of Segwit2x might be postponed.

Change.org to Mine for Charity

According to the calculations, if 10k computers will run the minning screensaver for 12 hours a day, the charity fund will receive $10k monthly
18 July 2018   99

Social platform for petitions Change.org announced the launch of a screensaver that mines Monero on users' computers. All tokens will be transferred to the charity fund of Change.org. This is reported by Coindesk.

This initiative was launched in partnership with the marketing agency Tracelocke Brazil.

Representatives of Change.org report that the screensaver will consume resources only when users do not use the computer. According to their calculations, if 10 thousand computers will run the screensaver for 12 hours a day, the charity fund will be transferred $ 10 thousand monthly.

At the moment the program is available only for Windows users and the platform did not report on the release plans for the version for macOS.

Note that at the end of April, a similar action was launched by the Australian unit of the United Nations International Children's Emergency Fund; (UNICEF). The website "Page of Hope" mines Monero cryptocurrency.