What is blockchain node and how it works? - Aurpay
blockchain node

What is blockchain node and how it works?

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Published on 6/22/2022 by Aurpaytech
blockchain node

Blockchain consists of a set of blocks

Several facts to remember:

  • A blockchain block is not a node.
  • A node consists of a group of blocks together.
  • A node contains a copy of the transaction history on the blockchain.


Basic types of nodes on blockchain


1. Full node:

  • Stores entire transaction history of blockchain data
  • Functionalities include block validation, states verification
  • Fulfill data request


2. Light node:

  • It only stores the header chain
  • Able to do data validation according to the state roots in the block headers
  • Suitable for low-capacity devices


3. Archive node:

Similar to the full node but build an archive of historical states

  • Not for average users but suitable for block explorers, wallet vendors, and chain analytics


There are other types as well,

In general, a node can do the following:


Step 1:

A miner tries to broadcast a new block to the blockchain.


Step 2:

Nodes check whether a block is valid or not. According to the transaction history, nodes have the right to accept or reject the league.


Step 3:

Nodes broadcast this transaction history to other nodes to synchronize the entire blockchain.

By the way, a miner must run a full node for block validation since the new block needs to cross-compare the transaction history.

Minimum requirements for Bitcoin and Ethereum nodes:

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