Full Node

A full node is a type of node in a blockchain network that stores a complete copy of the blockchain. This means that it has all the transaction and block data from the genesis block (the first block in the blockchain) up to the most recent block.

A full node is responsible for validating transactions and new blocks before they are added to the blockchain, and it plays a crucial role in maintaining the integrity of the blockchain. Full nodes do this by adhering to the consensus mechanism and the rules of the blockchain network. In the case of a decentralized network like Bitcoin or Ethereum, full nodes validate transactions by checking that they follow the network's protocols and that they are digitally signed by a valid address.

In addition to validating transactions, full nodes also propagate new transactions and blocks to other nodes on the network. This helps to keep the network in sync and ensures that all nodes have access to the most recent data.

Running a full node on a blockchain network is typically done by individuals or organizations who want to participate in the network and support its security and integrity. They are incentivized with cryptocurrency or other rewards for running a full node. It is important to note that, running a full node can require a lot of storage and computational power, it can be demanding and not suitable for all users.