Full Node vs. Light Client

What is the difference between a full node and a light client? A full node contains a full copy of the blockchain, while a light client is referencing a trusted full node's copy of the blockchain.

This allows users to transact on the blockchain without downloading an entire copy of the blockchain. And this is no small file. The entire history of the blockchain has to be downloaded, and for Bitcoin this is about 27GB.

Full nodes help process or validate transactions, so if you're interested in mining, you most likely have to be using a full node. Full nodes also contribute to the functionality of a network, by running a full node you're helping support the network.

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