November 2018
Intermediate to advanced
528 pages
13h 21m
English
Content preview from Blockchain By Example
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Blocks
If we consider blockchain to be a ledger or a book, a block can be compared to a page or a table in which we record a collection of confirmed transactions. Each block stored in the blockchain is uniquely identified by a hash, and composed of a header and a body.
The header encloses information about its creation (timestamp, Merkle root, Nonce, difficulty target, and version), and a reference to a previous block, whereas the body is a collection of the accepted transactions.
When a block is successfully validated (mined), it becomes part of the official blockchain. New bitcoins are generated in the block (a coinbase transaction) and paid to the validators (or miners).
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