Mastering Blockchain

Block

As discussed earlier, blocks are the main building blocks of a blockchain. Ethereum blocks consist of various components, which are described as follows:

• The block header
• The transactions list
• The list of headers of Ommers or Uncles

The transaction list is simply a list of all transactions included in the block. In addition, the list of headers of Uncles is also included in the block. The most important and complex part is the block header, which is discussed here.

Block header

Block headers are the most critical and detailed components of an Ethereum block. The header contains valuable information, which is described in detail here.

Parent hash

This is the Keccak 256-bit hash of the parent (previous) block's header.

Ommers hash

This is the Keccak ...