Glossary

Mysticeti concepts

Short definitions for the protocol terms that appear throughout the simulator and tutorial.

Concepts worth knowing

DAG
A directed acyclic graph: blocks can reference several earlier blocks, but references never loop backward.
Validator
A node participating in consensus by proposing blocks and referencing blocks from earlier rounds.
Round
A protocol step in which validators have an opportunity to produce proposal blocks.
Quorum
Enough validator support to make a protocol rule meaningful despite some faulty or offline validators.
Commit
A decision that a slot's chosen block is finalized and its transactions can be ordered.
Skip
A decision to move past a slot when the available evidence is not strong enough to commit it.
Equivocation
A validator creating conflicting proposals for the same slot, usually treated as faulty behavior.
Fast path
The low-latency path where enough clean references arrive for the protocol to finalize quickly.