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Limits of work test: Why can miners always choose a low -block hash
In the world of cryptocurrency mining, there is a fundamental principle in the game: proof of work (power). This is what allows miners to validate transactions and create new blocks in the Ethereum network. However, despite the name, Pow is not as simple as it seems. In this article, we will deepen why the miners cannot always choose a low block.
Hash function
A hash block, also known as « hash », is a hexadecimal number with 64 -Digit generated by the combination of current data and previous chain blocks. Pow’s purpose is to find a unique combination that meets a certain criterion: it must be less than or equal to the target hash.
Target Hash
Hash target is a fixed value defined by the developers of the Ethereum network, known as « difficulty ». This value represents the amount of calculation energy needed to solve a mathematical equation. The difficulty level affects the number of trials that the miners have to make before finding a valid hash block.
Why do the miners cannot always choose a hash with low block
So why can the miners simply choose a hash with low block? Here are some reasons:
- Calculation power : As the target difficulty increases, the amount of calculation energy needed to solve the equation increases exponentially. This means that even if a miner could find a lower hash block, it would take a practical time to do this.
- hash collisions: with a 64 -digit hexadecimal number, there is a small chance of hash sites in which two different inputs generate the same output hash. The miners must be extremely careful to avoid these collisions, which would allow other people to « cheat » and claim a reward without doing any work.
- The impact of the miners network : If a miner finds a low locking hash, it could interrupt the consensus mechanism. This is because other miners can take advantage of this opportunity to claim a reward before having the chance to do so.
Mathematics behind her
To illustrate why miners cannot always choose a low block hash, consider an example:
Suppose we have 1000 miners competing for the same target hash. If each miner was randomly select a number between 1 and 64 (inclusive), would essentially throw arrows on the wall without any pattern or strategy.
However, if a miner would use a gross force approach, trying all the possible block block, they could travel on a relatively fast solution due to the available calculation energy. On the other hand, even with millions of attempts per second, finding a low -lock hash remains an extremely difficult task.
Conclusion
In conclusion, although it may seem simple enough to choose a low locking hash for work proof, there are significant mathematical limitations and practices that make it impossible. The level of difficulty of the Ethereum network is carefully defined by its developers, taking into account the calculation power necessary to solve the equation. Miners should be extremely careful and strategic in their selection process to avoid possible interruptions or deception.
As the world of cryptocurrency mining continues to evolve, understanding these fundamental principles will become more and more important for those who want to participate in this interesting area.