---
title: States of the Aggregation Service
---

%% CAS Beacon and SMT Beacon cohorts. The service sees hashes only.

stateDiagram-v2
    state "Enroll participants" as Enroll
    state "Ready" as Ready
    state "Collect responses" as Collect
    state "Send the entries for checks" as Build
    state "Collect signatures" as Sign
    state "Broadcast the Beacon Signal" as Broadcast
    state "Round failed" as Failed

    [*] --> Enroll: advertise the cohort
    Enroll --> Ready: Beacon Address computed
    Ready --> Collect: round starts
    Collect --> Build: all n responses
    Collect --> Failed: a participant does not respond
    Build --> Sign
    Sign --> Broadcast: n signatures, or k with a fallback
    Sign --> Failed: too few signatures
    Broadcast --> Ready
    Failed --> Ready
    Ready --> [*]: cohort closed