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Showing posts from November, 2016

For the Die-Hards: Five Years In, Bitcoin Black Friday Narrows its Niche

While momentum for bitcoin as a consumer payment method has waned, Bitcoin Black Friday is still attracting attention from merchants its fifth year on. The event, a bitcoin version of the usually aggressive, post-Thanksgiving shopping spree, started in 2012 as what its founder Jon Holmquist calls "a half-baked idea". But that impromptu first year has blossomed […] Source

from Features – CoinDesk
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Why Aren't Bitcoin Businesses Talking About SegWit?

By most accounts, the activation of Segregated Witness (SegWit) should be a boon for bitcoin. The code, first proposed last December, has been introduced to the network, and at least 20% of bitcoin's hashing power is now signalling support for the software change that is expected to provide the first significant boost in capacity to […] Source

from Features – CoinDesk
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Why R3's Bank Exodus Isn't As Bad As You Think

Noelle Acheson is a 10-year veteran of company analysis, corporate finance and fund management, and a member of CoinDesk's product team. The following article originally appeared in CoinDesk Weekly, a custom-curated newsletter delivered every Sunday, exclusively to our subscribers. After a week of rumors and speculation, this much we know: Goldman Sachs, Banco Santander and Morgan Stanley […] Source

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Security alert [11/24/2016]: Consensus bug in geth v1.4.19 and v1.5.2

Security Alert

Affected configurations: Geth

Severity: High

Summary:  An issue has been identified with Geth’s journaling mechanism. This caused a network fork at block #2686351 (Nov-24-2016 14:12:07 UTC). The new Geth release 1.5.3 fixes the journaling issue and repairs the fork.Details: Geth was failing to revert empty account deletions when the transaction causing the deletions of empty accounts ended with an an out-of-gas exception. An additional issue was found in Parity, where the Parity client incorrectly failed to revert empty account deletions in a more limited set of contexts involving out-of-gas calls to precompiled contracts; the new Geth behavior matches Parity’s, and empty accounts will cease to be a source of concern in general in about one week once the state clearing process finishes.The chain that was created from block #2686351 by the old Geth client, which both Parity and the new Geth release consider invalid, seems to have been mostly abandoned around block #2686516,…

Bitcoin Price History

BTC/USD: A Quick Look At The Numbers

From Morden to Ropsten

Testing a forkThe Spurious Dragon hardfork is scheduled for the coming week; block 2675000 is likely to occur Tuesday evening (CET). The block number for the testnet “Morden” was scheduled at block 1885000. Performing the fork in the test network prior to performing it in the main network was an important measure taken in the testing process to ensure a smooth rollover into the post-fork state.The Morden fork occurred on Nov-20-2016, 06:12:20 +UTC, at block 1885000 as planned.  A bit later, at block 1885074, there was a consensus issue between Geth and Parity.Morden replay protectionThe Morden testnet has been running since the launch of the Ethereum blockchain (July 2015). At that time, concerns about replay-attacks between Morden and Mainnet were addressed by using a nonce-offset. All accounts on Morden used a starting nonce of 2^20 instead of 0, ensuring that any transaction valid on one chain would not be valid on the other.EIP 161 specifies new EVM rules regarding nonces. The imp…

Hard Fork No. 4: Spurious Dragon

The Ethereum network will be undergoing a hard fork at block number 2,675,000, which will likely occur between 15:00 and 16:00 UTC on Tuesday, November 22, 2016. A countdown timer can be seen at The Morden test network will be undergoing a hard fork at block number 1,885,000.As a user, what do I need to do?Download the latest version of your Ethereum client:Latest version of Ethereum Wallet/Mist (v0.8.7)Latest geth client (v1.5.2)Latest Parity client (v1.4.4)Latest ruby-ethereum client (v0.11.0)What happens if I do not update my client?If you are using an Ethereum client that is not updated for the upcoming hard fork, your client will sync to the pre-fork blockchain once the fork occurs. You will be stuck on an incompatible chain following the old rules and you will be unable to send ether or operate on the post-fork Ethereum network.Importantly, if your client is not updated, it also means that any transactions you make will still be susceptible to replay attac…

Whoa… Geth 1.5

The Go Ethereum team is very proud to finally release Geth 1.5, which can almost be called a complete internal rewrite of the Go Ethereum (go-ethereum) codebase.We’ve packed a huge number of changes into this release, and simply listing them wouldn’t do them justice. Instead, we’ve decided to write them up in a more informal way, explaining not only what’s new, but also why it’s needed, and why it’s awesome!Go Ethereum websiteThe go-ethereum project never really had a website. There was something auto-generated a long time ago by GitHub, but it couldn’t really be called a decent website as it didn’t contain valuable information, didn’t look particularly good, and there was nobody to properly maintain it. But at the time it was ok as the hardcore developers were cared more about the source repository and wiki pages, than a web site.However, as Ethereum gains popularity and traction, we are now making efforts to make Geth, its code, and associated resources more accessible and streamlin…