Bitcoin blockchain compression
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Content:
- Bitcoin Blockchain Compression Algorithm for Blank Node Synchronization
- Announcing Blockstream Satellite 2.0
- Bitcoin Blockchain Grows to 300 Gigabytes in Size
- Coinbase’s COO Says Company Is Preparing To Compress Trading Fees
- How Bitcoin mining really works
- Crypto-Compression of Medical Images by Selective Encryption of DCT
- Six myths about blockchain and Bitcoin: Debunking the effectiveness of the technology
Bitcoin Blockchain Compression Algorithm for Blank Node Synchronization
Peter Tschipper has been doing some very careful, quantitative studies on how to compress a Bitcoin connection. If Bitcoin messages could be compressed well, this may allow us to get more scaling bang for the buck, by enabling the network to send larger blocks in the number of bytes currently used to send a relatively small block.
But Peter's results so far do not look very inspiring. I believe the problems here stem from the choice of the generic Lempel-Ziv family of compressors. While I'm not familiar with every single compression engine Peter tested, the Lempel-Ziv family of compressors are generally based on "compression tables. Note that the sequence "abc" got added into the table only after it was encountered twice in the input. This is nice and generic and works well for English text where certain letter sequences e.
There are opportunities for much better compression, made possible by the structured reuse of certain byte sequences in the Bitcoin wire protocol. On a Bitcoin wire connection, we might see several related transactions reorganizing coins in a set of addresses, and therefore, several reuses of byte addresses. Or we might see a byte transaction get transmitted, followed by the same transaction, repeated in a block.
Ideally, we'd learn the sequence that may be repeated later on, all at once, and replace it with a short number, referring back to the long sequence.
In the example above, if we knew that "abcdf" was a unit that would likely be repeated, we would put it into the compression table as a whole, instead of relying on repetition to get it into the table.
Yet the LZ variants I know of will need to see a byte sequence repeated times in order to develop a single, reusable, byte long subsequence in the compression table.
So, a Bitcoin-specific compressor can do significantly better, but is it a good idea? Let's argue both sides of the coin:. On the one hand, Bitcoin-specific compressors will be closely tied to the contents of messages, which might make it difficult to change the wire format later on -- changes to the wire format may need corresponding changes to the compressor.
If the compressor cannot be implemented cleanly, then the protocol-agnostic, off-the-shelf compressors have a maintainability edge, which comes at the expense of the compression ratio.
Another argument is that compression algorithms of any kind should be tested thoroughly before inclusion, and brand new code may lack the maturity required. The nature of LZ compressors leads me to believe that much higher compression ratios are possible by building a custom, Bitcoin-aware compressor.
If I had to guess, I would venture that compression ratios of 2X or more are possible for some cases, and I base this on the fact that transactions are sometimes transmitted twice over links, once for dissemination and once as part of a block. In some sense, the "O 1 block propagation" idea that Gavin proposed a while ago can be seen as extreme example of a Bitcoin-specific compressor, albeit one that constrains the order of transactions in a block.
Compression can buy us some additional throughput at zero cost, modulo code complexity. Given the amount of acrimonious debate over the block size we have all had to endure, it seems criminal to leave potentially free improvements on the table. Even if the resulting code is deemed too complex to include in the production client right now, it would be good to understand the potential for improvement. This is the kind of self-contained exercise that bright young hackers love to tackle.
It'd bring in new programmers into the ecosystem, and many of us would love to discover the limits of compressibility for Bitcoin bits on a wire. And the results would be interesting even if the final compression engine is not enabled by default, or not even merged. Hacker and professor at Cornell, with interests that span distributed systems, OSes and networking. Hacking, Distributed. Bleak Outlook But Peter's results so far do not look very inspiring. Why Bitcoin Doesn't Compress Well.
Opportunity for Better Compression. Cons On the one hand, Bitcoin-specific compressors will be closely tied to the contents of messages, which might make it difficult to change the wire format later on -- changes to the wire format may need corresponding changes to the compressor. Pros The nature of LZ compressors leads me to believe that much higher compression ratios are possible by building a custom, Bitcoin-aware compressor.
How To Do It. Follow el33th4xor.
Announcing Blockstream Satellite 2.0
Abstract: The blockchain provides an immutable, transparent, and decentralized method for data storage. However, as the volume of data gradually increases, the public blockchain system requires significant storage space. The bitcoin block's structure was analyzed. A method was introduced to compress the size of transactions in the bitcoin blockchain by encoding specific fields.
Bitcoin Blockchain Grows to 300 Gigabytes in Size
My Chia blockchain is My last backup is about a week old, and the difference in size comes out to a growth of MB per day. I cannot imagine how much it will grow if the world starts actually using Chia outside of farming. I know Chia is doing their Bluebox thing to compress the blockchain, but how much compression is realistic? And how much of a hit will our nodes take while this compression is going on? Will it be a permanent thing to keep size down or a one-time deal? I ask because am pretty sure I had more skipped signage points last time the Bluebox Timelords were doing their thing before they stopped due to the memleak. I appreciate any input anybody may have on this. This will have to be addressed, as there is only so much space that it is reasonable to devote to the blockchain. That being said we have all devoted a serious amount of space to plots, which are fundamentally of no inherent value.
Coinbase’s COO Says Company Is Preparing To Compress Trading Fees
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How Bitcoin mining really works
While Coinbase Global Inc. Financial Services Conference on Tuesday. Coinbase has been diversifying from trading fees, which make up the majority of its revenue but tend to be volatile because of the wild swings in the prices of many cryptocurrencies. It offers a smaller, but growing subscription services that it expects to provide more predictable revenue. The company charges one of the higher fees in the industry, and investors have been concerned that it will face pressure to lower fees amid rising competition.
Crypto-Compression of Medical Images by Selective Encryption of DCT
Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I need to know if there is a way to print the Y component of the compressed key, or if I need to generate it from the uncompressed y component. If I need to generate it, can someone link me to a good explanation of how to work with the Integer class? You don't create a compressed key.
Six myths about blockchain and Bitcoin: Debunking the effectiveness of the technology
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With this, the MoCo team is also announcing its token pre-sale begins on June 20th. With just your smartphone camera, you will be able to make a 3D virtual avatar that exists on the MoCo Platform, with AI translating and emulating your real-life gestures into the avatar. All of this creates the next leap in the way that we communicate. MoCo can take a 1. All of this is blockchain-backed, with the MoCo Token allowing for token-based tipping, subscriptions, paid chats, and other payment scenarios including marketplaces within the MoCo VR ecosystem. Demonstrations of the industry-changing video compression technology from MoCo are being shown at the Japan Blockchain Conference from June 26thth, and will also be available at the Blockchain World Conference from July 11thth. Attendees and journalists will get the opportunity to interact with the virtual future right now.
There's also live online events, interactive content, certification prep materials, and more. You may have heard that bitcoin is based on cryptography , which is a branch of mathematics used extensively in computer security. Cryptography can also be used to prove knowledge of a secret without revealing that secret digital signature , or prove the authenticity of data digital fingerprint. These types of cryptographic proofs are the mathematical tools critical to bitcoin and used extensively in bitcoin applications.
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