January 2019
Beginner to intermediate
372 pages
11h 17m
English
Content preview from Foundations of Blockchain
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Block header
The block header, as stated before, consists of the metadata of the block. This holds the information that's needed to link the blocks in the blockchain:
Figure 1.4: Structure of a block header
Each block header will have the components outlined in Figure 1.4. These are the minimum fields required in a permissionless blockchain, such as Bitcoin, to efficiently create a block that can be appended to an immutable blockchain. The Previous Block Hash field is a reference to the last block created. The Merkle Root is the value of the Merkle hash tree; it summarizes all the transactions in the block. Timestamp, Difficulty Target, and ...
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