Unique Node List Explained

A simple guide to the UNL concept and why it is central to Ripple-style consensus.

What a UNL is

A Unique Node List, or UNL, is the set of validators a server listens to when participating in XRP Ledger consensus.

Why UNL exists

UNL logic helps a server decide which validation votes it should consider. This is different from networks where every node treats every participant the same way.

UNL and trust assumptions

The UNL concept is tied to trust assumptions in Ripple-style consensus. It is one reason the XRP Ledger source material is more technical than a simple asset whitepaper.

UNL and decentralization questions

UNL design often appears in discussions about XRP Ledger decentralization, validator diversity, and network safety.

How to use this concept

To understand XRPL, read UNL together with validators, consensus rounds, and ledger close.