Data Components of Bitcoin Block

This section describes data components of Bitcoin block.

At a high level, a Bitcoin block has two major data components:

1. Transaction List - The ordered list of transactions. The list could have 0 transactions, or more than 1,000 transactions. There is no upper limit. But the block size is limited to 1 MB. So if the average size of transactions is 500 bytes. You can store up to 2,000 transactions in a block.

2. Block header - The block header has a fixed size of 80 bytes. It contains 4 important information:

Below is an illustration of 2 data components in a Bitcoin block: Transaction List and Block Header. Note that the Merkle Tree is not stored in the block.

Data Components of Bitcoin Block
Data Components of Bitcoin Block

Last update: 2017.

Table of Contents

 About This Book

 Introduction of Bitcoin

 Bitcoin Blockchain

 Bitcoin Wallet

 Bitcoin Core

 Bitcoin Transaction

 Bitcoin-Qt - Bitcoin Core GUI

 Bitcoin Mining

 Bitcoin Consensus Rules

Bitcoin Block Data Structure

Data Components of Bitcoin Block

 Data Properties of Bitcoin Block

 Merkle Root of Bitcoin Block

 Calculate Double-SHA256 Hash with Python

 Verify Merkle Root of 2 Transactions

 Verify Merkle Root of 7 Transactions

 Data Structure of Bitcoin Block

 "getblock blockhash 0" - Serialized Hex Block Data

 Block Hash Calculation Algorithm

 Block Hash Calculation in Python

 Calculate Double-SHA256 Hash with Java

 Bitcoin Transaction Data Structure

 blockexplorer.com API

 Copay - Bitcoin Wallet

 References

 PDF Printing Version