Ethereum: How do I compute merkle root for genesis block?

Calculation of Merkle roots on Ethereum: a step-by-step instructions

introduction

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Ethereum is a decentralized open source blockchain platform with which developers can create and provide intelligent contracts. One of the basic aspects of the Ethereum network is his consensus mechanism, which is based on the creation of blocks that contain a number of transactions. In this article we will examine how the Merkle root for a Genesis block is calculated in an independent pure C application.

What are Genesis blocks?

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A Genesis block is the first block in a blockchain and is used as a starting point for all subsequent blocks. The Genesis block contains metadata via the blockchain and its initial state. To create a Genesis block, we have to calculate the Merkle root of the transactions contained in this block.

Merkle roots

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A Merkle root is a digital fingerprint that represents the transaction set contained in a block. It is calculated by taking the SHA-256-Hash of each transaction and then combining with bit-like operations. The resulting hash serves as a Merkle root for the block.

Computing Genesis Block Merkle Root in C.

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Here is an example -c code -Snippet that shows how the Merkle root for a Genesis block is calculated:

`C



#include 

#include 

// structure to represent a transaction

TypeFef Struct {

    Uint256 value; // transaction data (e.g. account balance, amount of assets)

} Transaction;

// function for calculating Merkle root with SHA-256

Uint256 Get_Merkle_root (Const Transaction* transactions) {

    Uint256 hash;

    SHA256_CTX SHA256;

    Sha256_init (& Sha256);

    For (int i = 0; i  value.size (); i ++) {

        Const char* data = transaction-> value.data [i] .bytes;

        uint8* bytes = new uint8 [data];

        SHA256_UPDATE (& SHA256, data, I + 1);

        Hash = SHA256_Final (bytes, & Sha256);

        Delete bytes;

    }

    Return hash;

}

int main () {

    // Example of Genesis block transactions

    Transaction transactions [2] = {

        {0x00000000, 0x12345678}, // Kontosaldo: 10 ether

        {0x00000001, 0x90123456} // asset quantity: 5 units

    };

    // Calculate Merkle root for the Genesis block

    uint256 merkle_root = get_komle_root (transactions);

    Printf ("Genesis Block Merkle root: %s \ n", hex_string (Merkle_root, 64));

    Return 0;

}

This code -nippet calculates the Merkle root for a simple genesis block that contains two transactions. The function GET_MECHLE_ROOT assumes an array of transactions as input and uses SHA-256 to calculate the Merkle root.

Note that this is just one sample implementation and you may be suitable for your specific application.

Diploma

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Calculating the Merkle root for a Genesis block in an independent pure C-application can be achieved by calculating the SHA-256-Hash of each transaction and then combining with bit-grown operations. This process includes the following steps:

Initialize the SHA-256 context.

Through the entire transaction and update the context with the transaction data.

3 .. Convert each byte to a Uint8 pointer and update the context.

If you follow this approach, you can create a pure C application that calculates the Merkle -Root for Genesis blocks independently without relying on reference client libraries or other external dependencies.

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