sequenceDiagram
    title Node Initialization — Pair A (InitNode)

    participant MainA as main (Pair A)
    participant NodeA as Node A
    participant libp2pA as libp2p (Pair A)
    participant DBA as DB Pair A (oc-lib)
    participant NATSA as NATS A
    participant IndexerA as Indexer (partagé)
    participant StreamA as StreamService A
    participant PubSubA as PubSubService A

    MainA->>NodeA: InitNode(isNode, isIndexer, isNativeIndexer)

    NodeA->>NodeA: LoadKeyFromFilePrivate() → priv
    NodeA->>NodeA: LoadPSKFromFile() → psk

    NodeA->>libp2pA: New(PrivateNetwork(psk), Identity(priv), ListenAddr:4001)
    libp2pA-->>NodeA: host A (PeerID_A)

    Note over NodeA: isNode == true

    NodeA->>libp2pA: NewGossipSub(ctx, host)
    libp2pA-->>NodeA: ps (GossipSub)

    NodeA->>IndexerA: ConnectToIndexers → SendHeartbeat /opencloud/heartbeat/1.0
    Note over IndexerA: Heartbeat long-lived établi<br/>Score qualité calculé (bw + uptime + diversité)
    IndexerA-->>NodeA: OK

    NodeA->>NodeA: claimInfo(name, hostname)
    NodeA->>IndexerA: TempStream /opencloud/record/publish/1.0
    NodeA->>IndexerA: json.Encode(PeerRecord A signé)
    IndexerA->>IndexerA: DHT.PutValue("/node/"+DID_A, record)

    NodeA->>DBA: NewRequestAdmin(PEER).Search(SELF)
    DBA-->>NodeA: peer A local (ou UUID généré)

    NodeA->>NodeA: StartGC(30s) — GC sur StreamRecords

    NodeA->>StreamA: InitStream(ctx, host, PeerID_A, 1000, nodeA)
    StreamA->>StreamA: SetStreamHandler(heartbeat/partner, search, planner, ...)
    StreamA->>DBA: Search(PEER, PARTNER) → liste partenaires
    DBA-->>StreamA: [] (aucun partenaire au démarrage)
    StreamA-->>NodeA: StreamService A

    NodeA->>PubSubA: InitPubSub(ctx, host, ps, nodeA, streamA)
    PubSubA->>PubSubA: subscribeEvents(PB_SEARCH, timeout=-1)
    PubSubA-->>NodeA: PubSubService A

    NodeA->>NodeA: SubscribeToSearch(ps, callback)
    Note over NodeA: callback: GetPeerRecord(evt.From)<br/>→ StreamService.SendResponse

    NodeA->>NATSA: ListenNATS(nodeA)
    Note over NATSA: Enregistre handlers:<br/>CREATE_RESOURCE, PROPALGATION_EVENT

    NodeA-->>MainA: *Node A prêt