Ethereum: Blockchain SHA256 hash and nonce [duplicate]

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Ethereum: Understanding Blockchain Hash and Nance

As a smart contract developer in the Ethereum block chain, it is likely to be familiar with the HASH SHA256 function used for the integrity of data and cryptographic purposes. However, when it comes to miners who try to create new blocks, understand how they work is crucial to optimize their code.

Sha256 hash creation

In Ethereum, each block has a unique hash value that serves as its fingerprint. The ET_Hash_Type event issued by the network during the creation of blocks includes information about this hash, which includes:

• Transaction data (non -compromised transactions)

• A random Nance (a sequence number used to verify the order of the block)

When the miners try to create new blocks, they try to calculate the hash SHA256 of the following components:

• Transaction data : The transactions not compromised in each block.

• Random Nance

  : The sequence number generated by the miner.

• HASH BLOCK: THE SINGLE HASH VALUE OF THE CURRENT BLOCK.

Interpreting the hash block

The Block_Hash field represents the hash Sha256 of the entire block, including transaction data and the random Nance. Miners use this hash to verify that their block is valid and not manipulated during transmission.

In a nutshell, each miner would make unwanted transactions and try to create a hash of transactions with a random Nance. However, there are some key differences:

* Transaction data : Only transaction data (non -compromised transactions) are included in each block. The Nance is random and adds later.

* Hashh Block: The hash of the entire block, including transaction data and Nonce.

Why do miners prefer to use a random child

Miners prefer to use a random Nance for several reasons:

• Block operation : Miners must verify that their block is ordered correctly by all nodes on the network.

• PREVENTION OF THE PRECIENCE DATA : When using a random Nance, the miners avoid any precommittee of data (that is, commit transactions before they are included in the block).

• Increased security : The use of a random Nance makes it more difficult for an attacker to predict or manipulate the hash of the block.

Example code

Here is a simplified example of how a random Nance could generate and calculate the hash Sha256:

`JavaScript

Console.log (Nance: $ {Nance});

Console.log (Block hash: $ {blockhash.tostring ()});

In this example,Transactionatais an object that contains uncommitted transactions. The random Nance (Nance`) is used to calculate the hash SHA256 of the transaction data and Nance.

By understanding how miners work in Ethereum Blockchain, you can optimize your code to take advantage of these security characteristics and at the same time ensure that your intelligent contracts are executed correctly.

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