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Syed Muhammad Ali Raza
Syed Muhammad Ali Raza

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Blockchain CRUD Operation

Robustly Improve CRUD Operations: Managing Blockchain Technology


Blockchain technology has attracted a lot of attention for its potential to transform various industries by providing decentralized and transparent solutions. One prominent programming language used for blockchain development is Solidity. In this article, we will explore how Solidity offers a secure and reliable approach to data management, allowing you to perform CRUD (Create, Read, Update, Delete) operations on the blockchain.

Understanding persistence and CRUD operations:

Solidity is a high-level programming language specifically designed for developing smart contracts on blockchain platforms, specifically Ethereum. This allows developers to define and implement business logic on the blockchain network. Using Solidity, we can create smart contracts that facilitate CRUD operations that allow us to manipulate the data stored in the notebook.

  1. Create:
    Data generation in Solidity is achieved through the deployment of smart contracts. Smart contracts act as self-enforcing contracts between multiple parties and are used to define data structures and associated functions. When a smart contract is deployed, the initial data can be configured and subsequent data can be added by custom contract functions.

  2. Read:
    Solidity allows you to read the data stored in the blockchain by defining a function that receives information from a smart contract. By defining the relevant revenue function in the smart contract, any authorized party in the blockchain can access the data. This function returns the requested information in a secure and transparent manner.

  3. Update:
    Updating data in the blockchain is done using smart contract functions that modify existing data. Solidity supports state variable functions that can be called by authorized users that allow specific data fields to be updated or new data added. This function implements the logic necessary to validate and implement the desired changes.

  4. Delete:
    In most blockchain transactions, data corruption is not recommended due to the immutability of the blockchain. Instead, a common approach is to mark the data as "deleted" or "inactive" to maintain the integrity of the block history. By adding additional data fields to change state variables or indicate inactive states, data can be efficiently extracted from future operations by preserving historical records.

Perform CRUD operations robustly:

Let's demonstrate the implementation of CRUD operations in Solidity using a simple example of a decentralized address book smart contract.

pragma solidity ^0.8.0;

contract AddressBook {
    struct Contact {
        string name;
        string email;
        string phoneNumber;

    mapping(address => Contact) private contacts;

    // Create operation
    function addContact(address _address, string memory _name, string memory _email, string memory _phoneNumber) external {
        Contact memory newContact = Contact(_name, _email, _phoneNumber);
        contacts[_address] = newContact;

    // Read operation
    function getContact(address _address) external view returns (string memory, string memory, string memory) {
        Contact memory contact = contacts[_address];
        return (,, contact.phoneNumber);

    // Update operation
    function updateContact(address _address, string memory _name, string memory _email, string memory _phoneNumber) external {
        Contact storage contact = contacts[_address]; = _name; = _email;
        contact.phoneNumber = _phoneNumber;

    // Delete operation
    function deleteContact(address _address) external {
        delete contacts[_address];

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In this example, the AddressBook'' contract defines theContact'' structure and provides the mapping of addresses to contacts. The addContact, getContact, updateContact, and deleteContact functions allow you to create, read, update, and delete contacts respectively.

The results:
Solidity provides developers with powerful tools to perform CRUD operations on the blockchain. Using this language, we can create smart contracts that facilitate secure and transparent data management. Whether developing decentralized applications, decentralized financial platforms or supply chain solutions, Solidity's support for CRUD processes enables developers to build innovative blockchain-based systems that improve trust, security and efficiency in a variety of industries.

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