Ethereum: Non standard Tx with obscure OP codes: examples

Ethereum Transaction Analysis: Understanding Obscure OP Codes

As a Python developer, you’re likely familiar with the Ethereum blockchain’s unique transaction format. However, when dealing with transactions that contain non-standard TXs (transactions) and obscure OP codes, it can be challenging to make sense of them.

In this article, we’ll delve into the world of Ethereum transactions and explore some examples of non-standard TXs with obscure OP codes. We’ll also provide explanations and insights to help you better understand these mysterious blocks.

What is a Transaction (TX) in Ethereum?

A transaction on the Ethereum blockchain consists of several components:

• Header

  

  : The header contains metadata about the transaction, such as the sender’s public address, the recipient’s public address, and the gas limit.

• Body: The body contains the actual data being transferred between accounts.

• Witness: A witness is a small value added to the transaction’s body to verify its correctness.

Understanding OP Codes

OP codes are a crucial part of Ethereum transactions. They represent instructions that can be executed by the Ethereum Virtual Machine (EVM). Here are some common OP codes:

• 0x00: No operation

• 0x01: Constant push

• 0x02: Push variable

• 0x03: Call function

• 0x04: Subtract

• 0x05: Multiply

• 0x06: Split

• 0x07: Modulus

• 0x08: Get field offset

• 0x09: Set field offset

Examples of Non-Standard TXs with Obscure OP Codes

Let’s take the example you provided:

scriptPubKey: "...

txHash: 77822fd6663c665104119cb7635352756dfc50da76a92d417ec1a12c518fad69"

Here are some examples of non-standard TXs with obscure OP codes that might give you a glimpse into the workings of this mysterious block:

• 0x00000001: This OP code is used to push a constant value onto the stack. In this case, it’s likely being pushed a value representing the transaction hash (e.g., the hexadecimal representation of the block number).

• 0x00000004: This OP code is used to subtract one value from another. The operands are likely to be passed as constants.

• 0x00000003: This OP code is used to call a function. In this case, it’s likely being called the tx.origin field, which contains information about the origin of the transaction.

Insights and Advice

When dealing with non-standard TXs with obscure OP codes, keep in mind:

• Always check the scriptPubKey to understand what data is being sent.

• Verify the txHash by checking its hexadecimal representation or using a tool like Etherscan.

• When working with transactions, it’s essential to understand the roles and values ​​involved.

By analyzing these examples and understanding OP codes, you’ll be better equipped to tackle more complex Ethereum transactions in your Python code. Happy analysis!