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What is Blockchain and How it Work?

Mohd. Razdar Hasan
Published: July 14, 2022


Blockchain is one of the fastest-growing networks having a CAGR (Compound Annual Growth Rate) of  85.9%. Not only that, its market is estimated to be around  $ 1432 billion by 2030, as per the data of findstack.

So, in this blog, we will discuss the various aspects of it i.e., what is blockchain, its advantages and disadvantages, its benefits, and How it works?

What is Blockchain?

What is blockchain?

Blockchain is a network of connected blocks that store data on both ends so that you can track its origin easily. It’s a dispersed database or ledger that nodes of the computer network share. The entire data is digitally stored, and one can easily trace its origin without hassle. An important characteristic is that it assures the safety and fidelity of recorded data without the involvement of any third party.

The block can store data such as what, when, how, etc., as per the user’s desire. When block capacity is filled, it’s closed and linked with the previous block forming a network of connected blocks. 

Once a block fills, a new block is created automatically that is compiled and added to the chain. Usually, a standard database collects data in tables, but here the data is strongly tied in blocks.

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After a block fills, each of them is set to stone and embedded as a part of the timeline and is given the exact timestamp when it’s added to the chain.

Simply put, Blockchain is a network of a strongly connected chain that stores the data in blocks. Instead of tables, it uses blocks, and when a block is packed, it is then tied to the chain of a previously stored block with a timestamp.

Advantages of Blockchain

Advantages o Blockchain

Like any other technology or product, this technology also has advantages that help scale its feasibility.

Open Source: This technology is accessible to all means one does not require permission from anybody to join and contribute to the distributed network.

Authenticity: This technology stores data in a decentralized manner, so it’s easy to verify the correctness of the information by using zero-knowledge proof without revealing anything about the data.

Permanent: Because of the decentralized structure, data information or records stored is permanent because it is decentralized over several trustworthy nodes.

Robust Security: For storing transactions, blockchain uses hashing techniques. Transactions are recorded on blocks, which are connected with other blocks for concrete security. Moreover, it uses SHA 256 hashing for tighter and robust security.

Permanency: Because of its decentralized structure, it’s hard to temper data within a block. Changes in any block will reflect on all nodes, so fraud occurrence reduces significantly.

Effectiveness: Its structure is a way that removes the use of third-party intervention in transactions making the system faster and more efficient. 

Disadvantages of Blockchain

Now, let’s see some of the limitations of this technology.

Scalability: One of the most significant limitations of this technology is scalability because of the fixed size of the block for storing information. The size of each block is 1 MB which means it can only hold a couple of transactions on a single block.

Slugginess: For adding the next block in the chain, miners need to calculate nonce values many times, which is a time-consuming and sluggish process. It causes trouble for its industrial implementation, as the speed is low and hinders the transaction process.

Legal obligation: In various countries, this technology is either banned or has many legal obligations, which are compulsory for its operation. Moreover, environmental issues also are causing it to lag in the commercial sector.

Storage: In a blockchain, each network node stores the data, which creates a storage issue. Further, if you want to increase the number of transactions, you must add more storage.

Regulations and Restrictions: Usability is one of the significant issues which block chain faces. Because the use of blockchain-based currencies is not that common. Moreover, various financial institutions do not accept the use of this technology.

Benefits of Blockchain

Benefits of Block chain

Improved Security

This technology can significantly change the way how your important information is viewed. The transactions are tamper-proof, making it too difficult to alter the record as it is end-to-end encrypted. Further, it helps prevent unauthorized and fraudulent activity. Moreover, participants can efficiently address privacy issues by anonymizing personal data on the network using permission to control access.


Blockchain uses distributed ledger transactions, and data are recorded identically in multiple locations. Every network participant who has permission to view the same information can access it conveniently with complete transparency at the exact moment. It records all transactions with time and date stamps.


The audit trail of blockchain documents enables you to track an asset’s origin at every step on its journey. Its data is easily traceable, and you can share its origin directly with customers. Additionally, it also exposes the weaknesses in the supply chain.


With the ‘smart contracts,’ one can automate block transactions. It will increase the efficiency and speed of the process. The next step of the transaction is automatically triggered when the preset condition for the smart contracts is fulfilled. Smart contracts reduce human and third-party intervention to verify whether contract terms are in accordance or not.

How Blockchain work?

For its functioning, every technology requires some core elements on which it works. Blockchain also has some essential elements that help its functioning. These are:

  1. Blocks
  2. Miners
  3. Nodes
How block chain work?

1. Blocks

The basic building block to store data is a block. Each block contains data, and when one block is filled, it automatically moves to the next one. This form a chained network of block strongly linked with each other. However, each block has three fundamental elements:

  • Data is stored inside them, and they have a size of 1MB.
  • Blocks use a randomly generated 32-bit ‘Nonce,’ which generates a block header ‘Hash.’
  • Wedded with Nonce is a 256-bit ‘Hash,’ which must start with a massive number of zeroes (which means it has to start with a small number).

Constructing the first block of the chain creates a nonce that generates the cryptographic hash. Also, the data inside it is considered signed and permanently tied to the nonce and hash until mined.

2. Miners

Through the mining process, miners create a new block on the chain, which helps them mine the data available inside the block.

Each block of the chain has its unique nonce and hash, but it also references the hash of the previous block in the chain hence, mining a block isn’t easy, especially on large chains.

For data mining, miners use special software which solves complex maths problems of finding a nonce that generates an accepted hash. A Nonce is only 32-bit, while the Hash is 256-bit, having a rough estimate of nearly 4 billion combinations to be mined before finding the right ‘Golden Nonce.’

But mining has its challenges, as a change in an initial block will require re-mining all the blocks which come after in the chain.

3. Nodes

One of the main concepts of this technology is decentralization. One computer or organization cannot own the chain. Instead, it is a distributed ledger through which the nodes are connected to the chain. These nodes can be any kind of electronic device which hold copies of the blockchain and maintain the network functioning.

Each node has its replica of the chain, and the network must algorithmically approve any mined block to be updated, verified, and trusted on the chain. Because of transparency, every action in the ledger can be viewed and checked. Each participant has unique alphanumeric identification numbers assigned to them, for viewing the transactions.

How Can Webkul Help You?

You must be wondering how Webkul can help and what role it plays in blockchain? 🤔🤔

Webkul is one of the leading names in providing B2B/B2C eCommerce, marketplace, hyperlocal, and mobile app development. In addition, we have worked with fortune 500 companies to provide them with solutions to their problems.

Further, we have Bitpay Payment Acquirer, which enables you to acquire digital payments using bitcoin.


In short, it is one of the fastest-growing technology, which can be the key to unlocking the future. Moreover, its plenty of features and security measures make it an ideal choice for transactions as it records the whole data, and it is difficult to alter the stored data at any level. The block structure can play a vital role to make things work for data and transactions.

Besides, if you have any doubts or queries regarding our apps, please Create A Ticket Here.

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I hope you find the blog helpful, do let us know in the comment how much you like this blog.