[HN Gopher] How blocks are chained in a blockchain
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       How blocks are chained in a blockchain
        
       Author : tapanjk
       Score  : 28 points
       Date   : 2025-10-27 16:27 UTC (2 days ago)
        
 (HTM) web link (www.johndcook.com)
 (TXT) w3m dump (www.johndcook.com)
        
       | a3w wrote:
       | Not "a blockchain", since e.g. Hyperledger Fabric and other
       | blockchains do not have the sha256 hashing and proof of work
       | parts.
       | 
       | But "the" blockchain, as in Bitcoin blockchain, the most infamous
       | one.
       | 
       | Title is misleading, but blog post is clear in being about
       | Bitcoin.
        
         | lagniappe wrote:
         | I'd say the majority of the modern non-fork networks don't use
         | proof of work and sha256. I'm on a team building one at the
         | moment and we're using sha3.sum512 and no proof of work for
         | production. Some "blockchains" aren't even blockchains of
         | sequential blocks, they are forest DAGs of just transactions.
         | 
         | I think the author's heart is in the right place and I'm
         | thankful that it's being discussed on HN, as blockchain
         | discussions can be a bit hit or miss here.
        
         | Retr0id wrote:
         | "The" blockchain is still "a" blockchain. There are many
         | possible blockchain instantiations and Bitcoin is one of them.
        
       | coolThingsFirst wrote:
       | Sure but how is this distributed?
       | 
       | Does every device hold the chain of blocks?
        
         | dewey wrote:
         | Yes, at least if you want to verify the whole chain.
        
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       (page generated 2025-10-29 23:00 UTC)