ocpp-debugkit · sepehr-safari · Jul 17, 2026 · Jul 17, 2026 · Jul 17, 2026
diff --git a/.changeset/open-ocpp-trace-input.md b/.changeset/open-ocpp-trace-input.md
@@ -0,0 +1,5 @@
+---
+'@ocpp-debugkit/toolkit': minor
+---
+
+Read the Open OCPP Trace interchange format. `parseTrace()` auto-detects it and `parseOpenOcppTrace()` parses it directly, mapping records onto the internal event model with raw-frame precedence, messageId-based action derivation, and unknown-field tolerance. `deriveOpenOcppTraceView()` exposes the format's consumer view, checked in CI against the specification's 15 conformance fixtures.
diff --git a/CURRENT_STATE.md b/CURRENT_STATE.md
@@ -8,13 +8,13 @@
 
 ## Active Milestone
 
-**v0.4.0 - Open OCPP Trace Interop (next)**
+**v0.4.0 - Open OCPP Trace Interop (in progress)**
 
 v0.3.1 is published to npm (16 detection rules, 15 scenarios, trace diffing,
-rich scenario assertions, and the ci/anonymize/diff CLI commands). Next up is
-interoperability with the Open OCPP Trace format: reading and writing the
-shared v1.1 interchange format so DebugKit exchanges traces with other OCPP
-tools, checked against the shared conformance fixtures.
+rich scenario assertions, and the ci/anonymize/diff CLI commands). The interop
+milestone reads and writes the shared Open OCPP Trace v1.1 interchange format,
+checked against the specification's conformance fixtures. The input half
+(#121) has landed; the exporter and `convert` CLI command (#122) remain.
 
 ## What's Done
 
@@ -226,10 +226,20 @@ tools, checked against the shared conformance fixtures.
 - ✅ `@ocpp-debugkit/toolkit@0.3.1` published to npm
 - ✅ Git tag `v0.3.1` + GitHub release `v0.3.1` created
 
+### Open OCPP Trace Input Adapter (PR #124)
+
+- ✅ `parseOpenOcppTrace()` reads the Open OCPP Trace v1.1 interchange format
+  (JSONL or JSON array of records); `parseTrace()` auto-detects and delegates
+  (Issue #121)
+- ✅ Raw-frame precedence, messageId-based action derivation, unknown-field
+  tolerance; shared untrusted-input limits extracted to `parseLimits.ts`
+- ✅ `deriveOpenOcppTraceView()` exposes the format's consumer view
+- ✅ 15 specification conformance fixtures vendored and asserted in CI
+
 ## What's Next
 
-1. **v0.4.0 - Open OCPP Trace Interop** - read and write the Open OCPP Trace
-   v1.1 interchange format (#121, #122), checked against the shared fixtures
+1. **v0.4.0 - Open OCPP Trace Interop** - reading (#121) is done; remaining:
+   the exporter and `convert` CLI command (#122), then the `v0.4.0` release
 2. **v0.5.0 - OCPP 2.0.1 Support** - extend the engine beyond 1.6J: message
    set, device model, scenarios, and detection
 3. **v1.0.0 - Stable FOSS Ecosystem** - API stabilization, 20+ scenarios, docs

diff --git a/README.md b/README.md
@@ -27,6 +27,9 @@ validate behavior against known scenarios.
 - **Replay Engine** — Deterministic, pure replay engine with step forward/back,
   jump-to-event, and configurable playback speed.
 - **Report Generation** — Export session analysis as Markdown or HTML reports.
+- **Open OCPP Trace Interop** - Read the vendor-neutral
+  [Open OCPP Trace](https://github.com/open-ocpp-trace/specification) interchange
+  format, so traces from other OCPP tools can be inspected and analyzed here.
 - **React Components** — Reusable, SSR-safe components for building custom
   inspector UIs (SessionTimeline, MessageInspector, FailureSummary,
   ReportViewer, ReplayControls).

diff --git a/docs/trace-format-spec.md b/docs/trace-format-spec.md
@@ -110,6 +110,41 @@ A JSON array of raw OCPP message arrays, with no event wrapper:
 
 ---
 
+## Open OCPP Trace Format (interop)
+
+DebugKit also reads the
+[Open OCPP Trace format](https://github.com/open-ocpp-trace/specification), a
+vendor-neutral interchange format for OCPP traces. This lets traces produced by
+other tools (simulators, proxies, CSMS test suites) be inspected and analyzed
+here without hand-converting them.
+
+The format is a stream of records, one OCPP-J frame per record, as JSONL or a
+JSON array of records:
+
+```jsonl
+{"schemaVersion":"1.1","timestamp":"2024-01-15T10:30:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-001","direction":"cp-to-csms","messageType":"CALL","messageId":"msg-001","action":"BootNotification","payload":{"chargePointVendor":"SyntheticVendor","chargePointModel":"SM-100"},"raw":"[2,\"msg-001\",\"BootNotification\",{\"chargePointVendor\":\"SyntheticVendor\",\"chargePointModel\":\"SM-100\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T10:30:00.500Z","transport":"json","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-001","payload":{"status":"Accepted"},"raw":"[3,\"msg-001\",{\"status\":\"Accepted\"}]"}
+```
+
+`parseTrace()` detects this format automatically; `parseOpenOcppTrace()` parses
+it directly. How records are consumed:
+
+- `direction` maps to the internal directions: `cp-to-csms` becomes
+  `CS_TO_CSMS`, `csms-to-cp` becomes `CSMS_TO_CS`.
+- `raw`, when present, is the authoritative frame. If it disagrees with the
+  decomposed fields, the frame from `raw` wins and a warning is recorded.
+- A response (`CALLRESULT` / `CALLERROR`) may omit `action`; its effective
+  action is derived by correlating on `messageId`. `deriveOpenOcppTraceView()`
+  reports that correlation as the format's consumer view.
+- Unknown fields are ignored, so a trace from a later minor version of the
+  format still parses. The same size and event-count [limits](#limits) apply.
+
+The format is governed independently at
+[open-ocpp-trace/specification](https://github.com/open-ocpp-trace/specification),
+which ships a conformance suite that DebugKit's parser is checked against.
+
+---
+
 ## OCPP 1.6 JSON Message Structure
 
 OCPP 1.6 JSON uses WebSocket text frames containing JSON arrays. There are

diff --git a/packages/toolkit/README.md b/packages/toolkit/README.md
@@ -8,6 +8,10 @@ report generation, React components, and CLI.
 
 - **Trace Parser** — Parse OCPP 1.6 JSON traces in JSON Object, JSONL, or bare
   array format. Safe parsing with size and event-count limits.
+- **Open OCPP Trace Interop** - Read the vendor-neutral
+  [Open OCPP Trace](https://github.com/open-ocpp-trace/specification) format via
+  `parseOpenOcppTrace()` (and `parseTrace()` auto-detection), checked against the
+  specification's conformance fixtures.
 - **Failure Detection** — 16 detection rules (4 critical, 10 warning, 2 info)
   covering common failure patterns: failed authorization, connector faults,
   station offline, heartbeat timeout, meter value gaps, invalid stop reasons,
@@ -245,6 +249,11 @@ Each event has a `message` field containing a raw OCPP 1.6 JSON array:
 - **CallResult:** `[3, "UniqueId", { ...payload }]`
 - **CallError:** `[4, "UniqueId", "ErrorCode", "ErrorDescription", {}]`
 
+`parseTrace()` additionally auto-detects the vendor-neutral
+[Open OCPP Trace](https://github.com/open-ocpp-trace/specification) interchange
+format (records carrying `messageType` and `direction`); parse it directly with
+`parseOpenOcppTrace()`.
+
 See the [trace format specification](https://github.com/ocpp-debugkit/toolkit/blob/main/docs/trace-format-spec.md) for full details.
 
 ## Links

diff --git a/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/README.md b/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/README.md
@@ -0,0 +1,16 @@
+# Vendored Open OCPP Trace fixtures
+
+Conformance fixtures from the Open OCPP Trace specification, vendored here so
+DebugKit's parser is checked against them in CI.
+
+- **Source:** [open-ocpp-trace/specification](https://github.com/open-ocpp-trace/specification)
+  (`fixtures/`). All data is synthetic.
+- Each `<name>/trace.jsonl` is a trace in the shared format. Each
+  `<name>/expected.json` is the consumer view a conformant implementation
+  derives from it: correlation pairs, effective actions, unanswered calls, and
+  orphan responses.
+- [`../../openOcppTrace.conformance.test.ts`](../../openOcppTrace.conformance.test.ts)
+  asserts that `deriveOpenOcppTraceView()` reproduces every `expected.json` and
+  that `parseOpenOcppTrace()` parses every trace.
+
+Do not edit these by hand. Refresh them from the specification when it changes.
diff --git a/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/connector-fault/expected.json b/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/connector-fault/expected.json
@@ -0,0 +1,143 @@
+{
+  "schemaVersion": "1.1",
+  "counts": {
+    "records": 20,
+    "calls": 10,
+    "callResults": 10,
+    "callErrors": 0
+  },
+  "records": [
+    {
+      "index": 0,
+      "messageType": "CALL",
+      "messageId": "msg-001",
+      "action": "BootNotification"
+    },
+    {
+      "index": 1,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-001",
+      "action": "BootNotification",
+      "correlatesWith": 0
+    },
+    {
+      "index": 2,
+      "messageType": "CALL",
+      "messageId": "msg-002",
+      "action": "StatusNotification"
+    },
+    {
+      "index": 3,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-002",
+      "action": "StatusNotification",
+      "correlatesWith": 2
+    },
+    {
+      "index": 4,
+      "messageType": "CALL",
+      "messageId": "msg-003",
+      "action": "StatusNotification"
+    },
+    {
+      "index": 5,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-003",
+      "action": "StatusNotification",
+      "correlatesWith": 4
+    },
+    {
+      "index": 6,
+      "messageType": "CALL",
+      "messageId": "msg-004",
+      "action": "Authorize"
+    },
+    {
+      "index": 7,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-004",
+      "action": "Authorize",
+      "correlatesWith": 6
+    },
+    {
+      "index": 8,
+      "messageType": "CALL",
+      "messageId": "msg-005",
+      "action": "StartTransaction"
+    },
+    {
+      "index": 9,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-005",
+      "action": "StartTransaction",
+      "correlatesWith": 8
+    },
+    {
+      "index": 10,
+      "messageType": "CALL",
+      "messageId": "msg-006",
+      "action": "StatusNotification"
+    },
+    {
+      "index": 11,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-006",
+      "action": "StatusNotification",
+      "correlatesWith": 10
+    },
+    {
+      "index": 12,
+      "messageType": "CALL",
+      "messageId": "msg-hb-1",
+      "action": "Heartbeat"
+    },
+    {
+      "index": 13,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-hb-1",
+      "action": "Heartbeat",
+      "correlatesWith": 12
+    },
+    {
+      "index": 14,
+      "messageType": "CALL",
+      "messageId": "msg-007",
+      "action": "MeterValues"
+    },
+    {
+      "index": 15,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-007",
+      "action": "MeterValues",
+      "correlatesWith": 14
+    },
+    {
+      "index": 16,
+      "messageType": "CALL",
+      "messageId": "msg-008",
+      "action": "StatusNotification"
+    },
+    {
+      "index": 17,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-008",
+      "action": "StatusNotification",
+      "correlatesWith": 16
+    },
+    {
+      "index": 18,
+      "messageType": "CALL",
+      "messageId": "msg-009",
+      "action": "StopTransaction"
+    },
+    {
+      "index": 19,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-009",
+      "action": "StopTransaction",
+      "correlatesWith": 18
+    }
+  ],
+  "unansweredCalls": [],
+  "orphanResponses": []
+}
diff --git a/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/connector-fault/trace.jsonl b/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/connector-fault/trace.jsonl
@@ -0,0 +1,20 @@
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:00:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"cp-to-csms","messageType":"CALL","messageId":"msg-001","action":"BootNotification","payload":{"chargePointVendor":"SyntheticVendor","chargePointModel":"SM-100","chargePointSerialNumber":"CS-SYNTHETIC-003","firmwareVersion":"1.0.0"},"raw":"[2,\"msg-001\",\"BootNotification\",{\"chargePointVendor\":\"SyntheticVendor\",\"chargePointModel\":\"SM-100\",\"chargePointSerialNumber\":\"CS-SYNTHETIC-003\",\"firmwareVersion\":\"1.0.0\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:00:00.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-001","payload":{"currentTime":"2024-01-15T12:00:00.500Z","interval":300,"status":"Accepted"},"raw":"[3,\"msg-001\",{\"currentTime\":\"2024-01-15T12:00:00.500Z\",\"interval\":300,\"status\":\"Accepted\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:01:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":0,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-002","action":"StatusNotification","payload":{"connectorId":0,"status":"Available","errorCode":"NoError"},"raw":"[2,\"msg-002\",\"StatusNotification\",{\"connectorId\":0,\"status\":\"Available\",\"errorCode\":\"NoError\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:01:00.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-002","payload":{},"raw":"[3,\"msg-002\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":1,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-003","action":"StatusNotification","payload":{"connectorId":1,"status":"Preparing","errorCode":"NoError"},"raw":"[2,\"msg-003\",\"StatusNotification\",{\"connectorId\":1,\"status\":\"Preparing\",\"errorCode\":\"NoError\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:00.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-003","payload":{},"raw":"[3,\"msg-003\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:15.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"cp-to-csms","messageType":"CALL","messageId":"msg-004","action":"Authorize","payload":{"idTag":"SYNTHETIC-TAG-002"},"raw":"[2,\"msg-004\",\"Authorize\",{\"idTag\":\"SYNTHETIC-TAG-002\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:15.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-004","payload":{"idTagInfo":{"status":"Accepted","expiryDate":"2024-12-31T23:59:59.000Z"}},"raw":"[3,\"msg-004\",{\"idTagInfo\":{\"status\":\"Accepted\",\"expiryDate\":\"2024-12-31T23:59:59.000Z\"}}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:30.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":1,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-005","action":"StartTransaction","payload":{"connectorId":1,"idTag":"SYNTHETIC-TAG-002","meterStart":0,"timestamp":"2024-01-15T12:02:30.000Z"},"raw":"[2,\"msg-005\",\"StartTransaction\",{\"connectorId\":1,\"idTag\":\"SYNTHETIC-TAG-002\",\"meterStart\":0,\"timestamp\":\"2024-01-15T12:02:30.000Z\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:30.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-005","payload":{"transactionId":100002,"idTagInfo":{"status":"Accepted"}},"raw":"[3,\"msg-005\",{\"transactionId\":100002,\"idTagInfo\":{\"status\":\"Accepted\"}}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:31.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":1,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-006","action":"StatusNotification","payload":{"connectorId":1,"status":"Charging","errorCode":"NoError"},"raw":"[2,\"msg-006\",\"StatusNotification\",{\"connectorId\":1,\"status\":\"Charging\",\"errorCode\":\"NoError\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:02:31.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-006","payload":{},"raw":"[3,\"msg-006\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:07:30.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"cp-to-csms","messageType":"CALL","messageId":"msg-hb-1","action":"Heartbeat","payload":{},"raw":"[2,\"msg-hb-1\",\"Heartbeat\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:07:30.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-hb-1","payload":{"currentTime":"2024-01-15T12:07:30.500Z"},"raw":"[3,\"msg-hb-1\",{\"currentTime\":\"2024-01-15T12:07:30.500Z\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:15:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":1,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-007","action":"MeterValues","payload":{"connectorId":1,"transactionId":100002,"meterValue":[{"timestamp":"2024-01-15T12:15:00.000Z","sampledValue":[{"value":"3500","measurand":"Energy.Active.Import.Register","unit":"Wh"}]}]},"raw":"[2,\"msg-007\",\"MeterValues\",{\"connectorId\":1,\"transactionId\":100002,\"meterValue\":[{\"timestamp\":\"2024-01-15T12:15:00.000Z\",\"sampledValue\":[{\"value\":\"3500\",\"measurand\":\"Energy.Active.Import.Register\",\"unit\":\"Wh\"}]}]}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:15:00.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-007","payload":{},"raw":"[3,\"msg-007\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:18:00.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","connectorId":1,"direction":"cp-to-csms","messageType":"CALL","messageId":"msg-008","action":"StatusNotification","payload":{"connectorId":1,"status":"Faulted","errorCode":"ConnectorLockFailure","info":"Connector lock mechanism failure detected"},"raw":"[2,\"msg-008\",\"StatusNotification\",{\"connectorId\":1,\"status\":\"Faulted\",\"errorCode\":\"ConnectorLockFailure\",\"info\":\"Connector lock mechanism failure detected\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:18:00.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-008","payload":{},"raw":"[3,\"msg-008\",{}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:18:05.000Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"cp-to-csms","messageType":"CALL","messageId":"msg-009","action":"StopTransaction","payload":{"transactionId":100002,"idTag":"SYNTHETIC-TAG-002","meterStop":3500,"timestamp":"2024-01-15T12:18:05.000Z","reason":"Other"},"raw":"[2,\"msg-009\",\"StopTransaction\",{\"transactionId\":100002,\"idTag\":\"SYNTHETIC-TAG-002\",\"meterStop\":3500,\"timestamp\":\"2024-01-15T12:18:05.000Z\",\"reason\":\"Other\"}]"}
+{"schemaVersion":"1.1","timestamp":"2024-01-15T12:18:05.500Z","ocppVersion":"1.6","transport":"json","chargePointId":"CS-SYNTHETIC-003","direction":"csms-to-cp","messageType":"CALLRESULT","messageId":"msg-009","payload":{"idTagInfo":{"status":"Accepted"}},"raw":"[3,\"msg-009\",{\"idTagInfo\":{\"status\":\"Accepted\"}}]"}
diff --git a/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/diagnostics-failure/expected.json b/packages/toolkit/src/core/__fixtures__/open-ocpp-trace/diagnostics-failure/expected.json
@@ -0,0 +1,65 @@
+{
+  "schemaVersion": "1.1",
+  "counts": {
+    "records": 8,
+    "calls": 4,
+    "callResults": 4,
+    "callErrors": 0
+  },
+  "records": [
+    {
+      "index": 0,
+      "messageType": "CALL",
+      "messageId": "msg-001",
+      "action": "BootNotification"
+    },
+    {
+      "index": 1,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-001",
+      "action": "BootNotification",
+      "correlatesWith": 0
+    },
+    {
+      "index": 2,
+      "messageType": "CALL",
+      "messageId": "msg-002",
+      "action": "StatusNotification"
+    },
+    {
+      "index": 3,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-002",
+      "action": "StatusNotification",
+      "correlatesWith": 2
+    },
+    {
+      "index": 4,
+      "messageType": "CALL",
+      "messageId": "msg-hb-1",
+      "action": "Heartbeat"
+    },
+    {
+      "index": 5,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-hb-1",
+      "action": "Heartbeat",
+      "correlatesWith": 4
+    },
+    {
+      "index": 6,
+      "messageType": "CALL",
+      "messageId": "msg-003",
+      "action": "DiagnosticsStatusNotification"
+    },
+    {
+      "index": 7,
+      "messageType": "CALLRESULT",
+      "messageId": "msg-003",
+      "action": "DiagnosticsStatusNotification",
+      "correlatesWith": 6
+    }
+  ],
+  "unansweredCalls": [],
+  "orphanResponses": []
+}