Light Node
sovereign assets • layer 1s • payment networks
Light node, also known as a lightweight or SPV (Simplified Payment Verification) node, is a type of blockchain client that does not store the entire blockchain. Instead, it downloads only the essential data—such as block headers and relevant transactions—to verify activity and interact with the network.
Light nodes rely on full nodes to provide accurate blockchain information but allow users to send, receive, and verify transactions with less storage and bandwidth. They are ideal for mobile wallets, browser-based interfaces, and users with limited computing resources.
While not as trustless or secure as full nodes, light nodes enable broader participation and accessibility in decentralized networks.
Use Case: A mobile Bitcoin wallet may operate as a light node, downloading block headers and using Merkle proofs from full nodes to confirm payments quickly without storing the full blockchain.
Key Concepts:
- Full Node — Stores the complete blockchain and serves data to light nodes.
- Simplified Payment Verification — Verification method that enables light nodes to confirm transactions.
- Block Headers — Compact metadata used by light nodes for transaction validation.
- Merkle Root — Cryptographic hash structure enabling efficient transaction proofs.
Summary: Light nodes make blockchain access practical for everyday devices, balancing efficiency and accessibility while relying on full nodes for full security and validation.