Ethereum: Why does the mined block differ so much from the block template?

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The mysterious block template: Understand the unique mined blocks of Ethereum

As an experienced cryptography enthusiast, it is likely to have noticed that Ethereum blocks contain more information than their corresponding templates. In this article, we will deepen the reasons behind this discrepancy and explore why the mining block differs both from the block template.

The segregated witness of Ethereum (Segwit)

One of the main factors that contribute to these differences lies in the implementation of segregated witnesses (Segwit). Introduced in 2017, Segwit was designed to improve Bitcoin’s scalability and allow more efficient transactions. However, its adoption rate was relatively slow.

To address the limitations of the traditional Bitcoin blocks, Ethereum developers created a new block template, called “block template” or “BTX”. This template is the basis of all Ethereum blocks and contains several environments that govern their behavior.

The block template: a more detailed appearance

When running bitcoin -cli getblocktemplate with the-format = btx option, you will receive the block template in a more detailed format. The BTX template includes:

• Block heading : This section contains metadata on the block, including its type (header or payload), sequence number, time brand and block size.

• Block body : This section is where real data is stored. It is divided into two parts: the “payload” and the “header”.

• Useful load : This part stores additional information, such as transaction ID, addresses and metadata.

THE MINADO BLOCK

Now that you know what the block template contains, let’s compare with a mined Ethereum block. As requested, we will examine the specific block at height 680175.

When inspecting the body of the block (payload) using the GetblockTemplate ‘command of Bitcoin with the-format = btx option and then comparing it to the block header in the BTX template, we noticed several differences:

* Time brand : The mining block has a different time mark than its corresponding block template. This may seem not related to first sight, but it is essential to understand the moment of events.

* Transaction IDS : The payload contains transaction ID that is not present in the block template. These IDs can be used to verify transactions or update the state of the block.

* Metadata

: Additional metadata in the payload, such as addresses and other relevant information are stored.

Conclusion

The differences between a mined Ethereum block and its corresponding block template are due to the unique implementation of segregated witnesses (secwit) on the Ethereum network. The BTX template provides a more detailed view of the structure of each block, including the body of the block and the metadata.

While these differences may seem unusual at first glance, they are a crucial aspect to maintain the integrity and consistency of the Ethereum block chain.

Additional resources

If you are interested in learning more about secwit or understanding how Ethereum blocks affect, I recommend you review the following resources:

* Ethereum corem wallet documentation : This tutorial provides a deep look at the Bitcoin ‘GetblockTemplate’ Getblock Comando and its use with different block headers.

* Segwit Whitepaper : Segwit’s official technical document explains the design and implementation of this new protocol, which has revolutionized the scalability of Bitcoin.

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