January 2019
Beginner to intermediate
372 pages
11h 17m
English
Content preview from Foundations of Blockchain
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Block attributes
If we consider a blockchain as a data structure, then the blocks are aggregated sets of data that are used for formation of the blockchain. Blockchain formation is similar to linked list formation, where each node has a reference to the next node in the sequence. In the case of blockchain, each block has a reference to the previous node, thus forming a link all the way to the initial block (known as the genesis block) of the chain. As we mentioned earlier, a blockchain can be stored in either flat file or database format. Bitcoin uses LevelDB to store metadata about all the blocks that are downloaded to the disk.
Just like a linked list node, each block has a pointer, which is the identifier of the block. These are just hashed ...
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