Interface HelloOk

interface HelloOk {
    type: "hello-ok";
    protocol: number;
    server: { version: string; connId: string };
    features: { methods: string[]; events: string[] };
    snapshot: Snapshot;
    canvasHostUrl?: string;
    auth?: {
        deviceToken: string;
        role: string;
        scopes: string[];
        issuedAtMs?: number;
    };
    policy: {
        maxPayload: number;
        maxBufferedBytes: number;
        tickIntervalMs: number;
    };
}