deps: upgrade trace_engine and drop manually written types

core/audits/layout-shifts.js

@@ -69,13 +69,16 @@ class LayoutShifts extends Audit {
 
     /** @type {Item[]} */
     const items = [];
-    const layoutShiftEvents = clusters.flatMap(c => c.events);
+    const layoutShiftEvents =
+      /** @type {import('../lib/trace-engine.js').SaneSyntheticLayoutShift[]} */(
+        clusters.flatMap(c => c.events)
+      );
     const topLayoutShiftEvents = layoutShiftEvents
       .sort((a, b) => b.args.data.weighted_score_delta - a.args.data.weighted_score_delta)
       .slice(0, MAX_LAYOUT_SHIFTS);
     for (const event of topLayoutShiftEvents) {
       const biggestImpactNodeId = TraceElements.getBiggestImpactNodeForShiftEvent(
-        event.args.data.impacted_nodes, impactByNodeId);
+        event.args.data.impacted_nodes || [], impactByNodeId);
       const biggestImpactElement = traceElements.find(t => t.nodeId === biggestImpactNodeId);
 
       // Turn root causes into sub-items.

core/computed/metrics/cumulative-layout-shift.js

@@ -159,7 +159,13 @@
         LayoutShifts: TraceEngine.TraceHandlers.LayoutShifts,
         Screenshots: TraceEngine.TraceHandlers.Screenshots,
       });
-      await processor.parse(events);
+      // eslint-disable-next-line max-len
+      await processor.parse(/** @type {import('@paulirish/trace_engine').Types.TraceEvents.TraceEventData[]} */ (
+        events
+      ));
+      if (!processor.data) {
+        throw new Error('null trace engine result');
+      }
       return processor.data.LayoutShifts.sessionMaxScore;
     };
     const cumulativeLayoutShift = await run(allFrameShiftEvents.map(e => e.event));

core/computed/trace-engine-result.js

@@ -26,8 +26,13 @@
       Samples: TraceEngine.TraceHandlers.Samples,
       Screenshots: TraceEngine.TraceHandlers.Screenshots,
     });
-    await engine.parse(traceEvents);
-    return engine.data;
+    // eslint-disable-next-line max-len
+    await engine.parse(/** @type {import('@paulirish/trace_engine').Types.TraceEvents.TraceEventData[]} */ (
+      traceEvents
+    ));
+    // TODO: use TraceEngine.TraceProcessor.createWithAllHandlers above.
+    return /** @type {import('@paulirish/trace_engine').Handlers.Types.TraceParseData} */(
+      engine.data);
   }
 
   /**
@@ -61,7 +66,11 @@
       }
     }
 
-    return TraceEngineResult.runTraceEngine(traceEvents);
+    const result = await TraceEngineResult.runTraceEngine(traceEvents);
+    if (!result) {
+      throw new Error('null trace engine result');
+    }
+    return result;
   }
 }
 

core/gather/gatherers/root-causes.js

@@ -32,26 +32,33 @@
     // nodeIds if the DOM domain was enabled before this gatherer, invoke it to be safe.
     await driver.defaultSession.sendCommand('DOM.getDocument', {depth: -1, pierce: true});
 
+    /** @type {import('@paulirish/trace_engine').RootCauses.RootCauses.RootCauseProtocolInterface} */
     const protocolInterface = {
       /** @param {string} url */
       // eslint-disable-next-line no-unused-vars
       getInitiatorForRequest(url) {
         return null;
       },
-      /** @param {number[]} backendNodeIds */
+      /** @param {import('@paulirish/trace_engine/generated/protocol.js').DOM.BackendNodeId[]} backendNodeIds */
       async pushNodesByBackendIdsToFrontend(backendNodeIds) {
         const response = await driver.defaultSession.sendCommand(
           'DOM.pushNodesByBackendIdsToFrontend', {backendNodeIds});
-        return response.nodeIds;
+        const nodeIds =
+          /** @type {import('@paulirish/trace_engine/generated/protocol.js').DOM.NodeId[]} */(
+            response.nodeIds);
+        return nodeIds;
       },
-      /** @param {number} nodeId */
+      /** @param {import('@paulirish/trace_engine/generated/protocol.js').DOM.NodeId} nodeId */
       async getNode(nodeId) {
         try {
           const response = await driver.defaultSession.sendCommand('DOM.describeNode', {nodeId});
           // This always zero, so let's fix it here.
           // https://bugs.chromium.org/p/chromium/issues/detail?id=1515175
           response.node.nodeId = nodeId;
-          return response.node;
+          const node =
+            /** @type {import('@paulirish/trace_engine/generated/protocol.js').DOM.Node} */(
+              response.node);
+          return node;
         } catch (err) {
           if (err.message.includes('Could not find node with given id')) {
             // TODO: when injecting an iframe, the engine gets the node of that frame's document element.
@@ -64,7 +71,8 @@
             // When this is fixed, remove this try/catch.
             // Note: this could be buggy by giving the wrong node detail if a node id meant for a non-main frame
             // happens to match one from the main frame ... which is pretty likely...
-            return null;
+            // TODO: fix trace engine type to allow returning null.
+            return /** @type {any} */(null);
           }
           throw err;
         }
@@ -79,17 +87,20 @@
           return [];
         }
       },
-      /** @param {number} nodeId */
+      /** @param {import('@paulirish/trace_engine/generated/protocol.js').DOM.NodeId} nodeId */
       async getMatchedStylesForNode(nodeId) {
         try {
           const response = await driver.defaultSession.sendCommand(
             'CSS.getMatchedStylesForNode', {nodeId});
-          return response;
-        } catch {
-          return [];
+          return {...response, getError() {}};
+        } catch (err) {
+          return /** @type {any} */({getError() {
+            return err.toString();
+          }});
         }
       },
       /** @param {string} url */
+      // @ts-expect-error
       // eslint-disable-next-line no-unused-vars
       async fontFaceForSource(url) {
         return null;
@@ -104,6 +115,8 @@
     const layoutShiftEvents = traceEngineResult.LayoutShifts.clusters.flatMap(c => c.events);
     for (const event of layoutShiftEvents) {
       const r = await rootCausesEngine.layoutShifts.rootCausesForEvent(traceEngineResult, event);
+      if (!r) continue;
+
       for (const cause of r.fontChanges) {
         // TODO: why isn't trace engine unwrapping this promise ...
         cause.fontFace = await cause.fontFace;

core/gather/gatherers/trace-elements.js

@@ -117,15 +117,19 @@ class TraceElements extends BaseGatherer {
   static async getTopLayoutShifts(trace, traceEngineResult, rootCauses, context) {
     const {impactByNodeId} = await CumulativeLayoutShift.request(trace, context);
     const clusters = traceEngineResult.LayoutShifts.clusters ?? [];
-    const layoutShiftEvents = clusters.flatMap(c => c.events);
+    const layoutShiftEvents =
+      /** @type {import('../../lib/trace-engine.js').SaneSyntheticLayoutShift[]} */(
+        clusters.flatMap(c => c.events)
+      );
 
     return layoutShiftEvents
       .sort((a, b) => b.args.data.weighted_score_delta - a.args.data.weighted_score_delta)
       .slice(0, MAX_LAYOUT_SHIFTS)
       .flatMap(event => {
         const nodeIds = [];
+        const impactedNodes = event.args.data.impacted_nodes || [];
         const biggestImpactedNodeId =
-          this.getBiggestImpactNodeForShiftEvent(event.args.data.impacted_nodes, impactByNodeId);
+          this.getBiggestImpactNodeForShiftEvent(impactedNodes, impactByNodeId);
         if (biggestImpactedNodeId !== undefined) {
           nodeIds.push(biggestImpactedNodeId);
         }

core/lib/trace-engine.js

@@ -1,15 +1,14 @@
-// @ts-expect-error missing types
 import * as TraceEngine from '@paulirish/trace_engine';
 
 import {polyfillDOMRect} from './polyfill-dom-rect.js';
 
+/** @typedef {import('@paulirish/trace_engine').Types.TraceEvents.SyntheticLayoutShift} SyntheticLayoutShift */
+/** @typedef {SyntheticLayoutShift & {args: {data: NonNullable<SyntheticLayoutShift['args']['data']>}}} SaneSyntheticLayoutShift */
+
 polyfillDOMRect();
 
-/** @type {import('../../types/trace-engine.js').TraceProcessor & typeof import('../../types/trace-engine.js').TraceProcessor} */
 const TraceProcessor = TraceEngine.Processor.TraceProcessor;
-/** @type {import('../../types/trace-engine.js').TraceHandlers} */
 const TraceHandlers = TraceEngine.Handlers.ModelHandlers;
-/** @type {import('../../types/trace-engine.js').RootCauses & typeof import('../../types/trace-engine.js').RootCauses} */
 const RootCauses = TraceEngine.RootCauses.RootCauses.RootCauses;
 
 export {

package.json

@@ -180,13 +180,13 @@
     "webtreemap-cdt": "^3.2.1"
   },
   "dependencies": {
-    "@paulirish/trace_engine": "^0.0.7",
+    "@paulirish/trace_engine": "^0.0.12",
     "@sentry/node": "^6.17.4",
     "axe-core": "^4.8.4",
     "chrome-launcher": "^1.1.0",
     "configstore": "^5.0.1",
     "csp_evaluator": "1.1.1",
-    "devtools-protocol": "0.0.1211954",
+    "devtools-protocol": "0.0.1232444",
     "enquirer": "^2.3.6",
     "http-link-header": "^1.1.1",
     "intl-messageformat": "^10.5.3",
@@ -211,8 +211,8 @@
     "yargs-parser": "^21.0.0"
   },
   "resolutions": {
-    "puppeteer/**/devtools-protocol": "0.0.1211954",
-    "puppeteer-core/**/devtools-protocol": "0.0.1211954"
+    "puppeteer/**/devtools-protocol": "0.0.1232444",
+    "puppeteer-core/**/devtools-protocol": "0.0.1232444"
   },
   "repository": "GoogleChrome/lighthouse",
   "keywords": [

types/artifacts.d.ts

@@ -5,6 +5,8 @@
  */
 
 import {Protocol as Crdp} from 'devtools-protocol/types/protocol.js';
+import * as TraceEngine from '@paulirish/trace_engine';
+import {LayoutShiftRootCausesData} from '@paulirish/trace_engine/models/trace/root-causes/LayoutShift.js';
 
 import {parseManifest} from '../core/lib/manifest-parser.js';
 import {Simulator} from '../core/lib/dependency-graph/simulator/simulator.js';
@@ -23,7 +25,6 @@ import LHResult from './lhr/lhr.js'
 import Protocol from './protocol.js';
 import Util from './utility-types.js';
 import Audit from './audit.js';
-import {TraceProcessor, LayoutShiftRootCauses} from './trace-engine.js';
 
 export type Artifacts = BaseArtifacts & GathererArtifacts;
 
@@ -569,10 +570,10 @@ declare module Artifacts {
     type?: string;
   }
 
-  type TraceEngineResult = TraceProcessor['data'];
+  type TraceEngineResult = TraceEngine.Handlers.Types.TraceParseData;
 
   interface TraceEngineRootCauses {
-    layoutShifts: Record<number, LayoutShiftRootCauses>;
+    layoutShifts: Record<number, LayoutShiftRootCausesData>;
   }
 
   interface ViewportDimensions {