A light node is a type of node in a cryptocurrency network that does not store the complete history of the blockchain. Instead, it only stores a portion of the blockchain data, such as the block headers. This allows light nodes to participate in the network without having to download and store the entire blockchain, making them more lightweight and requiring less computational resources.
The primary function of a light node is to quickly verify transactions and receive updates from other full nodes on the network. While light nodes cannot independently verify the entire blockchain, they rely on full nodes for this task. This trade-off in storage requirements allows light nodes to operate on devices with limited storage capacity, such as smartphones or tablets.
By using light nodes, users can still interact with the cryptocurrency network and make transactions without the need to download the entire blockchain. This makes it easier for casual users to participate in the network and benefits the overall decentralization of the cryptocurrency ecosystem.
