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Second MultiChain 2.0 preview release

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Per-asset permissions, capacity upgrading and inline metadata

Today we’re pleased to unveil the second preview release of MultiChain 2.0. This makes substantial progress on the MultiChain 2.0 roadmap, and includes an important extra feature relating to asset permissions.

Per-asset permissions

Let’s start with the surprise. This release adds the ability to separately control the send and receive permissions for each asset issued on the blockchain. This control is important in environments where each asset has different characteristics in terms of regulation, user identification requirements and so on.

At the time a new asset is issued, it can optionally be specified as receive- and/or send-restricted. Receive-restricted assets can only appear in transaction outputs whose address has receive permissions for that asset. Similarly, send-restricted assets can only be spent in transaction inputs by addresses which have per-asset send permissions. (Note that in all cases, addresses need global send and receive permissions to appear in inputs and outputs respectively.)

The send and receive permissions for an asset can be granted or revoked by any address which has admin or activate permissions for that asset. By default, these permissions are only assigned to the asset issuer, but the issuer (or any subsequently added asset administrator) can extend them to other addresses as well.

Blockchain parameter upgrades

One of the major features in development for MultiChain 2.0 is blockchain upgrading, to allow many of a chain’s parameters to be changed over time. This is vital because blockchains are designed to run for the long term, and it’s hard to predict how computer systems will be used many years after their creation.

MultiChain 1.0.x already provides a facility for upgrading a single parameter – the chain’s protocol version. This release of MultiChain 2.0 takes a significant step forwards, allowing changes to seven additional parameters related to blockchain performance and scaling. These include the target block time, maximum block size, maximum transaction size and maximum size of metadata.

As with other crucial operations relating to governance, upgrading a chain’s parameters can only be performed by the chain’s administrator(s), subject to a customizable level of consensus. We’re continuing to work on this feature, so look out for more upgradable parameters in future releases of MultiChain 2.0.

Inline metadata

MultiChain 1.0.x already supports unformatted (binary) transaction metadata, which can be embedded raw or wrapped in a stream item. The first preview release of MultiChain 2.0 extended this to allow metadata to be optionally represented in text or JSON format. In all of these cases the metadata appears in a separate transaction output containing an OP_RETURN, which makes the output unspendable by subsequent transactions.

This release of MultiChain 2.0 introduces a new type of metadata which we call “inline”. Inline metadata is stored within a regular spendable transaction output, and so is associated directly with that output’s address and/or assets. As with other forms of metadata, inline metadata can be in binary, text or JSON formats, and is easily writable and readable via a number of different APIs.

Inline metadata becomes truly powerful when used in conjunction with custom rules regarding transaction validity. One example is to send assets with an expiry date, or with a list of restrictions on where they can go next. In this release, custom validation rules can only be defined by modifying MultiChain’s C++ source code. However, once filters are implemented as part of the MultiChain 2.0 roadmap, these rules will be written in JavaScript and installed on a blockchain using regular API calls.

The road ahead

With this second preview/alpha release, we’ve completed about half of work scheduled for the open source Community edition of MultiChain 2.0. You can download and try out alpha 2 by visiting the MultiChain 2.0 preview releases page. On this page you’ll also find documentation for the new and enhanced APIs.

We’ve already started working on the next major feature for MultiChain 2.0, which we’re calling off-chain stream items. In an off-chain item, only a hash of the item’s payload is embedded inside the chain, alongside the item’s keys and some other metadata. The payload itself is stored locally by the publisher and propagated to the stream’s subscribers using peer-to-peer file sharing techniques, with the on-chain hash providing verification. The result is a huge improvement in the scalability and performance of blockchains used to record large amounts of information, where some of this information is only of interest to certain participants. While not originally planned for MultiChain 2.0, this feature rose up our list of priorities in response to user demand.

As always, we welcome your feedback on the progress of MultiChain 2.0, and look forward to delivering the next preview release in due course.

 

Please post any comments on LinkedIn.

 

Source: https://www.multichain.com/blog/2018/01/second-multichain-2-0-preview-release/

Blockchain

Bitcoin Price Has Only Ever Spent 93 Days Above $11,500

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With Bitcoin’s price hovering around $11,500, recent data indicated that the asset had spent only about three months of its existence above that particular level.

BTC: Only Three Months Above $11.5K

The official launch of the first-ever cryptocurrency came in early January 2009. Born during the last massive financial crisis, Bitcoin was this “magical money” that actually lacked any significant attention in its initial years. Consequently, its price traded close to zero for a while.

Since then, however, Bitcoin started gaining traction that ultimately resulted in severe volatility throughout the years. The massive fluctuations took the asset towards an all-time high in December 2017 of nearly $20,000, and just a year later, BTC saw its price beneath $4,000.

Fast-forwarding two years and Bitcoin is currently positioned around $11,500. Although this level is nearly twice as less as the all-time high, recent data from the analytics company Skew informed that BTC hadn’t spent a lot of time above $11,500.

Historical Performance Bitcoin Price. Source: Skew
Historical Performance Bitcoin Price. Source: Skew

More precisely, BTC’s price has hovered above $11,500 for only 93 days (or three months) since January 2009.

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Fundamentals in Place

Apart from the data above, Bitcoin’s hash rate has experienced a significant boost even after the completion of the third halving in May. As CryptoPotato reported recently, the metric measuring the computing power miners use to validate transactions on the BTC blockchain reached a new all-time high of 170 exahashes per second. This represented a 40% increase in the five months following the halving.

Although the hash rate is not correlated with the price, another report suggested an upcoming price increase. By indicating that Bitcoin whales, meaning entities with at least 1,000 coins, have slowed down accumulation, Glassnode asserted that this could ultimately be a bullish sign for the asset price.

Historically, once whales have stopped buying massive quantities, this has led to an opportunity for retail investors. According to the analytics company, Bitcoin may be in the “beginning of a run-up to a market top.”

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Source: https://cryptopotato.com/bitcoin-price-has-only-ever-spent-93-days-above-11500/

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US Fed Chair Jerome Powell Says It’s Better to Be Right Than First on CBDC

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  • US Fed Chair Powell believes that the United States should focus on getting right the development of a central bank digital currency (CBDC), rather than attempt to be first.
  • While speaking on a panel hosted by the International Monetary Fund (IMF), Powell reassured that the US is “committed to carefully and thoughtfully evaluating the potential costs and benefits of a CBDC for the US economy and payments system.”
  • Although Powell admitted that the digital currency has the potential to improve the current payments system, he claimed that the Fed hadn’t made a final decision on launching its own.
  • Reports from earlier this year suggested that the Federal Reserve had started experimenting with a hypothetical digital currency.
  • Nevertheless, today’s speech showcased that the US central bank is still unconvinced by that idea. In contrast, the other global superpower China has been making serious improvements on the matter. 
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  • CryptoPotato reported earlier today that China had taken the CBDC tests to its citizens by airdropping $1.5 million worth of the digital yuan and urging them to buy goods. However, the initial results weren’t promising as users said it didn’t offer anything groundbreaking. 

Featured Image Courtesy Of CNBC

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Source: https://cryptopotato.com/us-fed-chair-jerome-powell-says-its-better-to-be-right-than-first-on-cbdc/

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Blockchain

Bitcoin Price Eyes $12,000 Following US Fed Chair Powell Talks

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  • Bitcoin’s price finally made a worthwhile move after surging to $11,840 on Bitstamp following days of stagnation.
btcusdh_chart
BTC/USD. Source: TradingView
  • The price has since retraced a bit to trade at its current level of around $11,780. Nevertheless, this is a move in the right direction as concerns started crippling up that we might be in for a fill of the CME gap down at $11,100.
  • Bitcoin is trading approximately only $700 away from the $12,500 area – the 2020 highest level that was reached on August 17. The next major resistance for BTC now lies at $12,000 – $12,100.
  • The move came soon after the Chairman of the US Federal Reserve, Jerome Powell, spoke on a panel hosted by the International Monetary Fund (IMF).
  • During the event, he said that the US is “committed to carefully and thoughtfully evaluating the potential costs and benefits of a CBDC (Centra Bank Digital Currency) for the US economy and payments system.”
  • He also said that it’s better to be right than be first on CBDCs.
  • Interestingly enough, BTC’s move appears to be uncorrelated to the US stock market. At the time of this writing, the S&P 500 is down about 0.4%, while the Dow Jones Industrial Average (DJI) is down about 0.3%.
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Disclaimer: Information found on CryptoPotato is those of writers quoted. It does not represent the opinions of CryptoPotato on whether to buy, sell, or hold any investments. You are advised to conduct your own research before making any investment decisions. Use provided information at your own risk. See Disclaimer for more information.

Cryptocurrency charts by TradingView.


Source: https://cryptopotato.com/bitcoin-price-eyes-12000-following-us-fed-chair-powell-talks/

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