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Apple ef3473db21 snapshot: NODE1 production state 2026-02-09 
Complete snapshot of /opt/microdao-daarion/ from NODE1 (144.76.224.179).
This represents the actual running production code that has diverged
significantly from the previous main branch.

Key changes from old main:
- Gateway (http_api.py): expanded from ~40KB to 164KB with full agent support
- Router: new /v1/agents/{id}/infer endpoint with vision + DeepSeek routing
- Behavior Policy: SOWA v2.2 (3-level: FULL/ACK/SILENT)
- Agent Registry: config/agent_registry.yml as single source of truth
- 13 agents configured (was 3)
- Memory service integration
- CrewAI teams and roles

Excluded from snapshot: venv/, .env, data/, backups, .tgz archives

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-02-09 08:46:46 -08:00

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<h1 id="43-database-events-outbox-design-microdao">43 — Database Events Outbox Design (MicroDAO)<a class="headerlink" href="#43-database-events-outbox-design-microdao" title="Permanent link">&para;</a></h1>
<p><em>Outbox Pattern: транзакційна доставка подій, таблиця outbox_events, воркери, дедуплікація, retry, backpressure, інтеграція з NATS JetStream</em></p>
<hr />
<h2 id="1-purpose-scope">1. Purpose &amp; Scope<a class="headerlink" href="#1-purpose-scope" title="Permanent link">&para;</a></h2>
<p>Outbox Pattern вирішує проблему:</p>
<blockquote>
<p>Як гарантувати, що подія завжди буде доставлена у NATS без втрати даних, навіть якщо сервіс або NATS відмовили?</p>
</blockquote>
<p>Цей документ визначає:</p>
<ul>
<li>структуру <code>outbox_events</code>,</li>
<li>процес вставки,</li>
<li>воркерів,</li>
<li>правила retry/backoff,</li>
<li>дедуплікацію,</li>
<li>atomic commit,</li>
<li>safety механізми,</li>
<li>інтеграцію з JetStream.</li>
</ul>
<hr />
<h2 id="2-why-outbox-pattern-is-required">2. Why Outbox Pattern Is Required<a class="headerlink" href="#2-why-outbox-pattern-is-required" title="Permanent link">&para;</a></h2>
<p>У DAARION.city outbox використовується для:</p>
<ul>
<li>agent-run events,</li>
<li>payouts,</li>
<li>staking,</li>
<li>wallet tx,</li>
<li>embassy updates,</li>
<li>oracle readings,</li>
<li>governance updates,</li>
<li>usage increments.</li>
</ul>
<p>Причини:</p>
<ul>
<li>JetStream може бути недоступним у момент транзакції.</li>
<li>Сервіси не повинні втрачати події.</li>
<li>Потрібно гарантувати idempotency.</li>
<li>Потрібно відокремити business logic від доставки.</li>
</ul>
<hr />
<h2 id="3-outbox-table-schema">3. Outbox Table Schema<a class="headerlink" href="#3-outbox-table-schema" title="Permanent link">&para;</a></h2>
<div class="codehilite"><pre><span></span><code><span class="k">create</span><span class="w"> </span><span class="k">table</span><span class="w"> </span><span class="n">outbox_events</span><span class="w"> </span><span class="p">(</span>
<span class="w"> </span><span class="n">id</span><span class="w"> </span><span class="nb">text</span><span class="w"> </span><span class="k">primary</span><span class="w"> </span><span class="k">key</span><span class="p">,</span>
<span class="w"> </span><span class="n">stream</span><span class="w"> </span><span class="nb">text</span><span class="w"> </span><span class="k">not</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span><span class="c1">-- e.g. STREAM_RWA</span>
<span class="w"> </span><span class="n">topic</span><span class="w"> </span><span class="nb">text</span><span class="w"> </span><span class="k">not</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span><span class="c1">-- e.g. rwa.inventory.updated</span>
<span class="w"> </span><span class="n">payload</span><span class="w"> </span><span class="n">jsonb</span><span class="w"> </span><span class="k">not</span><span class="w"> </span><span class="k">null</span><span class="p">,</span>
<span class="w"> </span><span class="n">created_at</span><span class="w"> </span><span class="n">timestamptz</span><span class="w"> </span><span class="k">default</span><span class="w"> </span><span class="n">now</span><span class="p">(),</span>
<span class="w"> </span><span class="n">processed</span><span class="w"> </span><span class="n">bool</span><span class="w"> </span><span class="k">default</span><span class="w"> </span><span class="k">false</span><span class="p">,</span>
<span class="w"> </span><span class="n">processed_at</span><span class="w"> </span><span class="n">timestamptz</span><span class="p">,</span>
<span class="w"> </span><span class="n">error</span><span class="w"> </span><span class="nb">text</span><span class="w"> </span><span class="c1">-- optional failure reason</span>
<span class="p">);</span>
</code></pre></div>
<h3 id="_1">Вимоги:<a class="headerlink" href="#_1" title="Permanent link">&para;</a></h3>
<ul>
<li><code>id</code> генерується UUID або snowflake.</li>
<li>Рядки <strong>ніколи не видаляються</strong> (тільки retention archive).</li>
<li><code>processed=false</code> означає «готовий до доставки».</li>
</ul>
<hr />
<h2 id="4-outbox-event-insertion">4. Outbox Event Insertion<a class="headerlink" href="#4-outbox-event-insertion" title="Permanent link">&para;</a></h2>
<p>Подія вставляється у <strong>тій самій транзакції</strong>, що і бізнес-операція.</p>
<p>Приклад (псевдо):</p>
<div class="codehilite"><pre><span></span><code><span class="k">BEGIN</span><span class="p">;</span>
<span class="k">UPDATE</span><span class="w"> </span><span class="n">payouts</span><span class="w"> </span><span class="k">SET</span><span class="w"> </span><span class="n">status</span><span class="o">=</span><span class="s1">&#39;generated&#39;</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">id</span><span class="o">=</span><span class="s1">&#39;p_001&#39;</span><span class="p">;</span>
<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">outbox_events</span><span class="w"> </span><span class="p">(</span>
<span class="w"> </span><span class="n">id</span><span class="p">,</span><span class="w"> </span><span class="n">stream</span><span class="p">,</span><span class="w"> </span><span class="n">topic</span><span class="p">,</span><span class="w"> </span><span class="n">payload</span>
<span class="p">)</span><span class="w"> </span><span class="k">VALUES</span><span class="w"> </span><span class="p">(</span>
<span class="w"> </span><span class="n">gen_id</span><span class="p">(),</span><span class="w"> </span>
<span class="w"> </span><span class="s1">&#39;STREAM_PAYOUT&#39;</span><span class="p">,</span>
<span class="w"> </span><span class="s1">&#39;payout.generated&#39;</span><span class="p">,</span>
<span class="w"> </span><span class="s1">&#39;{&quot;payout_id&quot;:&quot;p_001&quot;,&quot;team_id&quot;:&quot;t_555&quot;}&#39;</span><span class="p">::</span><span class="n">jsonb</span>
<span class="p">);</span>
<span class="k">COMMIT</span><span class="p">;</span>
</code></pre></div>
<p>Гарантія:</p>
<ul>
<li>якщо COMMIT відбувся → подія потрапила у Outbox.</li>
<li>якщо COMMIT не відбувся → подія не існує.</li>
</ul>
<hr />
<h2 id="5-outbox-worker-architecture">5. Outbox Worker Architecture<a class="headerlink" href="#5-outbox-worker-architecture" title="Permanent link">&para;</a></h2>
<div class="codehilite"><pre><span></span><code>Outbox Worker →
SELECT * FROM outbox_events
WHERE processed=false
ORDER BY created_at
LIMIT 200;
for each event:
TRY publish to NATS
ON success → mark processed
ON failure → retry later
</code></pre></div>
<p>Workers можуть бути:</p>
<ul>
<li>1..N штук,</li>
<li>статично або auto-scaled,</li>
<li>у Mesh під mTLS.</li>
</ul>
<hr />
<h2 id="6-worker-processing-loop">6. Worker Processing Loop<a class="headerlink" href="#6-worker-processing-loop" title="Permanent link">&para;</a></h2>
<div class="codehilite"><pre><span></span><code><span class="k">while</span> <span class="n">true</span><span class="p">:</span>
<span class="n">events</span> <span class="o">=</span> <span class="n">db</span><span class="o">.</span><span class="n">fetch_unprocessed</span><span class="p">(</span><span class="n">limit</span><span class="o">=</span><span class="mi">200</span><span class="p">)</span>
<span class="k">for</span> <span class="n">evt</span> <span class="ow">in</span> <span class="n">events</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">nats</span><span class="o">.</span><span class="n">publish</span><span class="p">(</span><span class="n">evt</span><span class="o">.</span><span class="n">topic</span><span class="p">,</span> <span class="n">evt</span><span class="o">.</span><span class="n">payload</span><span class="p">)</span>
<span class="n">db</span><span class="o">.</span><span class="n">mark_processed</span><span class="p">(</span><span class="n">evt</span><span class="p">)</span>
<span class="k">except</span> <span class="n">NATSDownError</span><span class="p">:</span>
<span class="n">sleep</span><span class="p">(</span><span class="n">backoff</span><span class="p">)</span>
<span class="k">continue</span>
<span class="k">except</span> <span class="n">ValidationError</span><span class="p">:</span>
<span class="n">db</span><span class="o">.</span><span class="n">mark_error</span><span class="p">(</span><span class="n">evt</span><span class="p">,</span> <span class="s2">&quot;invalid payload&quot;</span><span class="p">)</span>
<span class="k">continue</span>
</code></pre></div>
<hr />
<h2 id="7-deduplication">7. Deduplication<a class="headerlink" href="#7-deduplication" title="Permanent link">&para;</a></h2>
<p>Необхідно витримати <strong>at-least-once</strong>, але уникати дублювань:</p>
<ul>
<li>JetStream має natural dedupe по <code>msg_id</code></li>
<li>Outbox Worker використовує:</li>
</ul>
<div class="codehilite"><pre><span></span><code>NATS header: Nats-Msg-Id = outbox_event_id
</code></pre></div>
<p>Приклад:</p>
<div class="codehilite"><pre><span></span><code><span class="n">nats</span><span class="o">.</span><span class="n">publish</span><span class="p">(</span>
<span class="n">topic</span><span class="p">,</span>
<span class="n">payload</span><span class="p">,</span>
<span class="n">headers</span><span class="o">=</span><span class="p">{</span><span class="s2">&quot;Nats-Msg-Id&quot;</span><span class="p">:</span> <span class="n">evt</span><span class="o">.</span><span class="n">id</span><span class="p">}</span>
<span class="p">)</span>
</code></pre></div>
<p>JetStream не доставить дубль.</p>
<hr />
<h2 id="8-retry-strategy">8. Retry Strategy<a class="headerlink" href="#8-retry-strategy" title="Permanent link">&para;</a></h2>
<h3 id="81-backoff">8.1 Backoff<a class="headerlink" href="#81-backoff" title="Permanent link">&para;</a></h3>
<p>Експоненційний:</p>
<div class="codehilite"><pre><span></span><code>1s → 2s → 4s → 8s → 16s → max 60s
</code></pre></div>
<h3 id="82-dead-letter-condition">8.2 Dead-letter Condition<a class="headerlink" href="#82-dead-letter-condition" title="Permanent link">&para;</a></h3>
<p>Після X помилок:</p>
<div class="codehilite"><pre><span></span><code>processed=false
error=&quot;unrecoverable&quot;
</code></pre></div>
<p>worker перестає ретрити; адміністратор розбирається вручну.</p>
<hr />
<h2 id="9-batch-processing-throughput">9. Batch Processing &amp; Throughput<a class="headerlink" href="#9-batch-processing-throughput" title="Permanent link">&para;</a></h2>
<h3 id="_2">Рекомендації:<a class="headerlink" href="#_2" title="Permanent link">&para;</a></h3>
<ul>
<li>batch size: 100–300 подій</li>
<li>2–10 worker replicas</li>
<li>автоматичний autoscaling по lag:</li>
<li>якщо кількість <code>processed=false</code> &gt; 10,000 → scale up</li>
</ul>
<hr />
<h2 id="10-event-ordering-rules">10. Event Ordering Rules<a class="headerlink" href="#10-event-ordering-rules" title="Permanent link">&para;</a></h2>
<p>Outbox Worker дотримується ordering:</p>
<ul>
<li>per stream</li>
<li>per partition key (custom)</li>
</ul>
<p>Порядок подій важливий для:</p>
<ul>
<li>payouts</li>
<li>RWA updates</li>
<li>governance</li>
</ul>
<hr />
<h2 id="11-multi-stream-routing">11. Multi-Stream Routing<a class="headerlink" href="#11-multi-stream-routing" title="Permanent link">&para;</a></h2>
<p>Сервіс визначає stream:</p>
<div class="codehilite"><pre><span></span><code>if topic startswith &quot;agent.run&quot;:
stream = STREAM_AGENT_RUN
if topic startswith &quot;embassy&quot;:
stream = STREAM_EMBASSY
</code></pre></div>
<p>Усі стріми повинні бути попередньо створені:</p>
<div class="codehilite"><pre><span></span><code><span class="p">{</span>
<span class="w"> </span><span class="nt">&quot;name&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;STREAM_RWA&quot;</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;subjects&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">&quot;rwa.inventory.*&quot;</span><span class="p">],</span>
<span class="w"> </span><span class="nt">&quot;replicas&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span>
<span class="w"> </span><span class="nt">&quot;storage&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;file&quot;</span>
<span class="p">}</span>
</code></pre></div>
<hr />
<h2 id="12-failure-modes">12. Failure Modes<a class="headerlink" href="#12-failure-modes" title="Permanent link">&para;</a></h2>
<h3 id="121-worker-crash">12.1 Worker Crash<a class="headerlink" href="#121-worker-crash" title="Permanent link">&para;</a></h3>
<p>Рішення:</p>
<ul>
<li>worker restart → обробляє далі.</li>
</ul>
<h3 id="122-database-down">12.2 Database Down<a class="headerlink" href="#122-database-down" title="Permanent link">&para;</a></h3>
<p>Outbox Worker призупиняється → не доставляє події.</p>
<h3 id="123-nats-down">12.3 NATS Down<a class="headerlink" href="#123-nats-down" title="Permanent link">&para;</a></h3>
<p>Worker робить retry до відновлення.</p>
<h3 id="124-corrupted-payload">12.4 Corrupted Payload<a class="headerlink" href="#124-corrupted-payload" title="Permanent link">&para;</a></h3>
<p>Worker позначає <code>error</code> і пропускає подію.</p>
<hr />
<h2 id="13-safety-guarantees">13. Safety Guarantees<a class="headerlink" href="#13-safety-guarantees" title="Permanent link">&para;</a></h2>
<p>Outbox забезпечує:</p>
<ul>
<li><strong>atomicity</strong></li>
<li><strong>consistency</strong></li>
<li><strong>at-least-once</strong></li>
<li><strong>no-loss</strong></li>
<li><strong>event replayability</strong></li>
<li><strong>jetstream dedupe</strong></li>
<li><strong>idempotent consumers</strong></li>
</ul>
<hr />
<h2 id="14-event-consumer-rules">14. Event Consumer Rules<a class="headerlink" href="#14-event-consumer-rules" title="Permanent link">&para;</a></h2>
<p>Кожен сервіс, що слухає події, дотримується:</p>
<ul>
<li>idempotency (повтор повинен не ламати логіку),</li>
<li>durable consumer,</li>
<li>manual ack,</li>
<li>retry on failure,</li>
<li>trace_id propagation.</li>
</ul>
<hr />
<h2 id="15-operational-metrics">15. Operational Metrics<a class="headerlink" href="#15-operational-metrics" title="Permanent link">&para;</a></h2>
<p>Моніторимо:</p>
<ul>
<li>outbox_events total count</li>
<li>unprocessed count</li>
<li>processing rate</li>
<li>worker lag</li>
<li>NATS publish latency</li>
<li>error rate</li>
</ul>
<hr />
<h2 id="16-backpressure-control">16. Backpressure Control<a class="headerlink" href="#16-backpressure-control" title="Permanent link">&para;</a></h2>
<p>Якщо worker не встигає:</p>
<ul>
<li>автоматичний autoscaling,</li>
<li>або backpressure для producer services (м'яке гальмування).</li>
</ul>
<hr />
<h2 id="17-batch-deletion-archival">17. Batch Deletion / Archival<a class="headerlink" href="#17-batch-deletion-archival" title="Permanent link">&para;</a></h2>
<p>Outbox події можуть бути:</p>
<ul>
<li>заархівовані після 90–365 днів,</li>
<li>переведені у cold storage (S3),</li>
<li>видалені після 3 років (policy-dependent).</li>
</ul>
<hr />
<h2 id="18-example-end-to-end-flow-payout">18. Example End-to-End Flow (Payout)<a class="headerlink" href="#18-example-end-to-end-flow-payout" title="Permanent link">&para;</a></h2>
<div class="codehilite"><pre><span></span><code><span class="n">sequenceDiagram</span>
<span class="w"> </span><span class="n">participant</span><span class="w"> </span><span class="n">W</span><span class="w"> </span><span class="kr">as</span><span class="w"> </span><span class="n">Wallet</span><span class="w"> </span><span class="kr">Service</span>
<span class="w"> </span><span class="n">participant</span><span class="w"> </span><span class="n">DB</span>
<span class="w"> </span><span class="n">participant</span><span class="w"> </span><span class="n">OUT</span><span class="w"> </span><span class="kr">as</span><span class="w"> </span><span class="n">Outbox</span><span class="w"> </span><span class="n">Worker</span>
<span class="w"> </span><span class="n">participant</span><span class="w"> </span><span class="n">NATS</span>
<span class="w"> </span><span class="n">W</span><span class="o">-&gt;&gt;</span><span class="n">DB</span><span class="o">:</span><span class="w"> </span><span class="n">tx</span><span class="w"> </span><span class="n">begin</span>
<span class="w"> </span><span class="n">W</span><span class="o">-&gt;&gt;</span><span class="n">DB</span><span class="o">:</span><span class="w"> </span><span class="n">insert</span><span class="w"> </span><span class="n">payout</span>
<span class="w"> </span><span class="n">W</span><span class="o">-&gt;&gt;</span><span class="n">DB</span><span class="o">:</span><span class="w"> </span><span class="n">insert</span><span class="w"> </span><span class="n">outbox_event</span><span class="p">(</span><span class="n">payout</span><span class="p">.</span><span class="n">generated</span><span class="p">)</span>
<span class="w"> </span><span class="n">DB</span><span class="o">--&gt;&gt;</span><span class="n">W</span><span class="o">:</span><span class="w"> </span><span class="n">commit</span>
<span class="w"> </span><span class="n">OUT</span><span class="o">-&gt;&gt;</span><span class="n">DB</span><span class="o">:</span><span class="w"> </span><span class="nf">fetch</span><span class="w"> </span><span class="n">unprocessed</span>
<span class="w"> </span><span class="n">OUT</span><span class="o">-&gt;&gt;</span><span class="n">NATS</span><span class="o">:</span><span class="w"> </span><span class="n">publish</span><span class="w"> </span><span class="n">payout</span><span class="p">.</span><span class="n">generated</span><span class="w"> </span><span class="p">(</span><span class="n">msg_id</span><span class="o">=</span><span class="n">evt_id</span><span class="p">)</span>
<span class="w"> </span><span class="n">NATS</span><span class="o">--&gt;&gt;</span><span class="n">OUT</span><span class="o">:</span><span class="w"> </span><span class="n">ack</span>
<span class="w"> </span><span class="n">OUT</span><span class="o">-&gt;&gt;</span><span class="n">DB</span><span class="o">:</span><span class="w"> </span><span class="n">mark</span><span class="w"> </span><span class="n">processed</span>
</code></pre></div>
<hr />
<h2 id="19-integration-with-other-docs">19. Integration with Other Docs<a class="headerlink" href="#19-integration-with-other-docs" title="Permanent link">&para;</a></h2>
<p>Цей документ доповнює:</p>
<ul>
<li><code>42_nats_event_streams_and_event_catalog.md</code></li>
<li><code>27_database_schema_migrations.md</code></li>
<li><code>34_internal_services_architecture.md</code></li>
<li><code>29_scaling_and_high_availability.md</code></li>
</ul>
<hr />
<h2 id="20-cursor">20. Завдання для Cursor<a class="headerlink" href="#20-cursor" title="Permanent link">&para;</a></h2>
<div class="codehilite"><pre><span></span><code>You are a senior backend engineer. Implement Database Events Outbox Design using:
- 43_database_events_outbox_design.md
- 42_nats_event_streams_and_event_catalog.md
- 27_database_schema_migrations.md
Tasks:
1) Create outbox_events table schema (id, stream, topic, payload, created_at, processed, processed_at, error).
2) Implement Outbox Event Insertion (atomic transaction with business logic).
3) Create Outbox Worker service (fetch unprocessed, publish to NATS, mark processed).
4) Implement Worker Processing Loop (batch processing, error handling).
5) Add Deduplication (NATS header Nats-Msg-Id = outbox_event_id).
6) Implement Retry Strategy (exponential backoff, dead-letter condition).
7) Configure Batch Processing &amp; Throughput (batch size 100-300, autoscaling).
8) Add Event Ordering Rules (per stream, per partition key).
9) Implement Multi-Stream Routing (topic → stream mapping).
10) Handle Failure Modes (worker crash, database down, NATS down, corrupted payload).
11) Add Safety Guarantees (atomicity, consistency, at-least-once, no-loss, replayability).
12) Define Event Consumer Rules (idempotency, durable consumer, manual ack, retry, trace_id).
13) Add Operational Metrics (outbox_events count, unprocessed count, processing rate, worker lag, NATS latency, error rate).
14) Implement Backpressure Control (autoscaling, producer backpressure).
15) Add Batch Deletion / Archival (90-365 days archive, S3 cold storage, 3 years deletion).
Output:
- list of modified files
- diff
- summary
</code></pre></div>
<hr />
<h2 id="21-summary">21. Summary<a class="headerlink" href="#21-summary" title="Permanent link">&para;</a></h2>
<p>Outbox Design гарантує:</p>
<ul>
<li>надійну доставку подій у JetStream,</li>
<li>100% уникнення втрати даних,</li>
<li>консистентність життєво важливих RWA/payout/embassy процесів,</li>
<li>контрольовану доставку у high-load,</li>
<li>retry/backoff без дублювань,</li>
<li>зручну діагностику й моніторинг.</li>
</ul>
<p>Це — <strong>основний транспортний транзакційний шар DAARION OS</strong>.</p>
<hr />
<p><strong>Версія:</strong> 1.0<br />
<strong>Останнє оновлення:</strong> 2024-11-14</p>
</article>
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