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   874

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.


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.

UCLA Blockchain Crypto Conference to be Held in LA

The UCLA Conference will be held on February 17-18 of 2018, gathering together the most experienced and exciting thinkers
17 February 2018   218

UCLA's Blockchain Lab and Far from LA are holding the Blockchain Cryptocurrency Conference, gathering together the most experienced and exciting thinkers across SoCal, in order to foster both economic and educational progress. The conference will concern cybersecurity, cryptocurrencies, and blockchain.

The UCLA Conference will be held on February 17-18 of 2018.

Location: The University of California, Humanities Building, 415 Portola Plaza, UCLA 90095, Los Angeles

The headline speakers will include Kathleen Breitman, the co-founder of Tezos; Sandra Ro from UWIN Lab; David Moss from EOS; Jeremy Rubin, the Bitcoin core developer, and many more.

The agenda of the conference is as follows: the future of blockchain keynote, bringing humanity to the blockchain, cybersecurity, autonomous vehicles, blockchain's influence on the development of art and culture, blockchain in the music industry, government adoption of blockchain around the world, and more.