Do I need to run a node to use crypto?

No. Most users interact through wallets and apps that connect to nodes run by others.

What's the benefit of running my own node?

It lets you verify transactions independently rather than trusting a third party's node.

Are more nodes always better?

Generally, more independent, well-distributed nodes improve decentralization and resilience, though it's not the only factor that matters.

What Is a Blockchain Node and Why Do Nodes Matter?

A blockchain node is a computer that stores a copy of the blockchain and helps validate new transactions and blocks against the network's rules. Nodes are what make a blockchain genuinely decentralized rather than dependent on any single server, a concept central to \[pillar hyperlink: What Is Blockchain\].

Node types

Full nodes store the entire blockchain history and independently verify every rule. Lighter nodes store less data and rely partly on full nodes for verification, trading some independence for lower resource requirements.

Validation

Nodes check that new transactions and blocks follow the network's rules, correct signatures, no double-spending, valid format, before accepting them. This distributed checking is what prevents any single participant from cheating unnoticed.

Decentralization

The more independent nodes a network has, spread across different operators and locations, the harder it becomes for any single party to control or corrupt the ledger. Node count and distribution are often cited as a rough proxy for a network's decentralization. See How Does Blockchain Work for how this ties into consensus.

Running a node

Anyone can typically run a full node on a public blockchain, given enough storage and bandwidth, participating directly in verifying the network rather than just trusting others to do so.

Node types

Validation

Decentralization

Running a node

Frequently asked questions