From e9230279986efbb95e1d427fd4d5f0dec38d3ece Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Mon, 9 Mar 2026 20:19:52 +0100
Subject: [PATCH 1/8] feat: add active_ab_tests to swap events

---
 packages/bridge-controller/CHANGELOG.md       |  1 +
 .../src/utils/metrics/types.ts                |  8 ++++
 .../bridge-status-controller/CHANGELOG.md     |  1 +
 .../src/bridge-status-controller.test.ts      |  4 +-
 .../src/bridge-status-controller.ts           | 38 ++++++++++++++++---
 .../bridge-status-controller/src/types.ts     | 10 ++++-
 .../src/utils/metrics.test.ts                 | 36 +++++++++++++++++-
 .../src/utils/metrics.ts                      | 13 ++++++-
 8 files changed, 100 insertions(+), 11 deletions(-)

diff --git a/packages/bridge-controller/CHANGELOG.md b/packages/bridge-controller/CHANGELOG.md
index a284dbe2cef..cdd1d58ad08 100644
--- a/packages/bridge-controller/CHANGELOG.md
+++ b/packages/bridge-controller/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Widen `RequiredEventContextFromClient` `InputChanged.input_amount_preset` to accept arbitrary string labels (for example `85%`, `95%`, `MAX`) while preserving compatibility with `InputAmountPreset` enum values. ([#8069](https://github.com/MetaMask/core/pull/8069))
+- Include optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`.
 
 ## [67.3.0]
 
diff --git a/packages/bridge-controller/src/utils/metrics/types.ts b/packages/bridge-controller/src/utils/metrics/types.ts
index 9d8504c106a..7949b573cb2 100644
--- a/packages/bridge-controller/src/utils/metrics/types.ts
+++ b/packages/bridge-controller/src/utils/metrics/types.ts
@@ -243,11 +243,15 @@ type RequiredEventContextFromClientBase = {
  * This combines the event-specific properties from RequiredEventContextFromClientBase
  * with an optional `location` property. When `location` is omitted, the controller
  * falls back to the value stored via `setLocation()` (defaults to MainView).
+ *
+ * `ab_tests` is the legacy field and `active_ab_tests` is the newer field.
+ * Both are kept for a migration window and are treated as separate payloads.
  */
 export type RequiredEventContextFromClient = {
   [K in keyof RequiredEventContextFromClientBase]: RequiredEventContextFromClientBase[K] & {
     location?: MetaMetricsSwapsEventSource;
     ab_tests?: Record<string, string>;
+    active_ab_tests?: Record<string, string>;
   };
 };
 
@@ -309,6 +313,9 @@ export type EventPropertiesFromControllerState = {
 /**
  * trackUnifiedSwapBridgeEvent payload properties consist of required properties from the client
  * and properties from the bridge controller
+ *
+ * `ab_tests` will be deprecated in favor of `active_ab_tests` in the future.
+ * `ab_tests` and `active_ab_tests` intentionally coexist during migration.
  */
 export type CrossChainSwapsEventProperties<
   T extends UnifiedSwapBridgeEventName,
@@ -317,6 +324,7 @@ export type CrossChainSwapsEventProperties<
       action_type: MetricsActionType;
       location: MetaMetricsSwapsEventSource;
       ab_tests?: Record<string, string>;
+      active_ab_tests?: Record<string, string>;
     }
   | Pick<EventPropertiesFromControllerState, T>[T]
   | Pick<RequiredEventContextFromClient, T>[T];
diff --git a/packages/bridge-status-controller/CHANGELOG.md b/packages/bridge-status-controller/CHANGELOG.md
index 125966be132..946265b6e23 100644
--- a/packages/bridge-status-controller/CHANGELOG.md
+++ b/packages/bridge-status-controller/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added optional `abTests` parameter to `StartPollingForBridgeTxStatusArgs` ([#8007](https://github.com/MetaMask/core/pull/8007))
 - Added optional `abTests` parameter to `submitTx` and `submitIntent` methods for A/B test experiment attribution ([#8007](https://github.com/MetaMask/core/pull/8007))
 - `trackUnifiedSwapBridgeEvent` now resolves `ab_tests` from event properties or transaction history and includes it in emitted events ([#8007](https://github.com/MetaMask/core/pull/8007))
+- Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`.
 
 ### Changed
 
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.test.ts b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
index 5d4469f177f..10e2743fcfd 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.test.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
@@ -4255,7 +4255,7 @@ describe('BridgeStatusController', () => {
         expect(messengerCallSpy.mock.lastCall).toMatchSnapshot();
       });
 
-      it('should include ab_tests from history in tracked event properties', () => {
+      it('should include ab_tests and active_ab_tests from history in tracked event properties', () => {
         const abTestsTxMetaId = 'bridgeTxMetaIdAbTests';
         bridgeStatusController.startPollingForBridgeTxStatus({
           ...getMockStartPollingForBridgeTxStatusArgs({
@@ -4263,6 +4263,7 @@ describe('BridgeStatusController', () => {
             srcTxHash: '0xsrcTxHashAbTests',
           }),
           abTests: { token_details_layout: 'treatment' },
+          activeAbTests: { bridge_quote_sorting: 'variant_b' },
         });
 
         const messengerCallSpy = jest.spyOn(mockBridgeStatusMessenger, 'call');
@@ -4284,6 +4285,7 @@ describe('BridgeStatusController', () => {
           expect.anything(),
           expect.objectContaining({
             ab_tests: { token_details_layout: 'treatment' },
+            active_ab_tests: { bridge_quote_sorting: 'variant_b' },
           }),
         );
       });
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.ts b/packages/bridge-status-controller/src/bridge-status-controller.ts
index 0b0efe710d0..c14f6402312 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.ts
@@ -522,6 +522,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
       isStxEnabled,
       location,
       abTests,
+      activeAbTests,
       accountAddress: selectedAddress,
     } = startPollingForBridgeTxStatusArgs;
 
@@ -569,6 +570,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
       featureId: quoteResponse.featureId,
       location,
       ...(abTests && { abTests }),
+      ...(activeAbTests && { activeAbTests }),
     };
     this.update((state) => {
       // Use actionId as key for pre-submission, or txMeta.id for post-submission
@@ -1318,7 +1320,8 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
    * @param isStxEnabledOnClient - Whether smart transactions are enabled on the client, for example the getSmartTransactionsEnabled selector value from the extension
    * @param quotesReceivedContext - The context for the QuotesReceived event
    * @param location - The entry point from which the user initiated the swap or bridge (e.g. Main View, Token View, Trending Explore)
-   * @param abTests - A/B test context to attribute events to specific experiments
+   * @param abTests - Legacy A/B test context for `ab_tests` (backward compatibility)
+   * @param activeAbTests - New A/B test context for `active_ab_tests` (migration target). Attributes events to specific experiments.
    * @returns The transaction meta
    */
   submitTx = async (
@@ -1328,6 +1331,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     quotesReceivedContext?: RequiredEventContextFromClient[UnifiedSwapBridgeEventName.QuotesReceived],
     location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
     abTests?: Record<string, string>,
+    activeAbTests?: Record<string, string>,
   ): Promise<TransactionMeta & Partial<SolanaTransactionMeta>> => {
     this.messenger.call(
       'BridgeController:stopPollingForQuotes',
@@ -1351,6 +1355,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
       isHardwareAccount,
       location,
       abTests,
+      activeAbTests,
     );
     // Emit Submitted event after submit button is clicked
     !quoteResponse.featureId &&
@@ -1532,6 +1537,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
               approvalTxId,
               location,
               abTests,
+              activeAbTests,
             },
             actionId,
           );
@@ -1582,6 +1588,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
           approvalTxId,
           location,
           abTests,
+          activeAbTests,
         });
       }
 
@@ -1611,7 +1618,8 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
    * @param params.signature - Hex signature produced by eth_signTypedData_v4
    * @param params.accountAddress - The EOA submitting the order
    * @param params.location - The entry point from which the user initiated the swap or bridge
-   * @param params.abTests - A/B test context to attribute events to specific experiments
+   * @param params.abTests - Legacy A/B test context for `ab_tests` (backward compatibility)
+   * @param params.activeAbTests - New A/B test context for `active_ab_tests` (migration target). Attributes events to specific experiments.
    * @returns A lightweight TransactionMeta-like object for history linking
    */
   submitIntent = async (params: {
@@ -1620,9 +1628,16 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     accountAddress: string;
     location?: MetaMetricsSwapsEventSource;
     abTests?: Record<string, string>;
+    activeAbTests?: Record<string, string>;
   }): Promise<Pick<TransactionMeta, 'id' | 'chainId' | 'type' | 'status'>> => {
-    const { quoteResponse, signature, accountAddress, location, abTests } =
-      params;
+    const {
+      quoteResponse,
+      signature,
+      accountAddress,
+      location,
+      abTests,
+      activeAbTests,
+    } = params;
 
     this.messenger.call(
       'BridgeController:stopPollingForQuotes',
@@ -1638,6 +1653,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
       isHardwareAccount,
       location,
       abTests,
+      activeAbTests,
     );
 
     try {
@@ -1783,6 +1799,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
           startTime,
           location,
           abTests,
+          activeAbTests,
         });
 
         // Start polling using the orderId key to route to intent manager
@@ -1831,11 +1848,16 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
       EventName
     >[EventName],
   ): void => {
+    // Legacy/new metrics fields are intentionally kept independent during migration.
     const historyAbTests = txMetaId
       ? this.state.txHistory?.[txMetaId]?.abTests
       : undefined;
-    const resolvedAbTests =
-      eventProperties?.ab_tests ?? historyAbTests ?? undefined;
+    const historyActiveAbTests = txMetaId
+      ? this.state.txHistory?.[txMetaId]?.activeAbTests
+      : undefined;
+    const resolvedAbTests = eventProperties?.ab_tests ?? historyAbTests;
+    const resolvedActiveAbTests =
+      eventProperties?.active_ab_tests ?? historyActiveAbTests;
 
     const baseProperties = {
       action_type: MetricsActionType.SWAPBRIDGE_V1,
@@ -1848,6 +1870,10 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
         Object.keys(resolvedAbTests).length > 0 && {
           ab_tests: resolvedAbTests,
         }),
+      ...(resolvedActiveAbTests &&
+        Object.keys(resolvedActiveAbTests).length > 0 && {
+          active_ab_tests: resolvedActiveAbTests,
+        }),
     };
 
     // This will publish events for PERPS dropped tx failures as well
diff --git a/packages/bridge-status-controller/src/types.ts b/packages/bridge-status-controller/src/types.ts
index ed410151560..b47b84d4116 100644
--- a/packages/bridge-status-controller/src/types.ts
+++ b/packages/bridge-status-controller/src/types.ts
@@ -138,10 +138,15 @@ export type BridgeHistoryItem = {
    */
   location?: MetaMetricsSwapsEventSource;
   /**
-   * A/B test context to attribute swap/bridge events to specific experiments.
+   * Legacy A/B test metrics context (`ab_tests`) kept for backward compatibility.
    * Keys are test names, values are variant names (e.g. { token_details_layout: 'treatment' }).
    */
   abTests?: Record<string, string>;
+  /**
+   * New A/B test metrics context (`active_ab_tests`) that replaces `ab_tests`.
+   * Kept separate so migration can run both payloads in parallel.
+   */
+  activeAbTests?: Record<string, string>;
   /**
    * Attempts tracking for exponential backoff on failed fetches.
    * We track the number of attempts and the last attempt time for each txMetaId that has failed at least once
@@ -211,7 +216,10 @@ export type StartPollingForBridgeTxStatusArgs = {
   approvalTxId?: BridgeHistoryItem['approvalTxId'];
   isStxEnabled?: BridgeHistoryItem['isStxEnabled'];
   location?: BridgeHistoryItem['location'];
+  // Legacy field for `ab_tests` metrics payload.
   abTests?: BridgeHistoryItem['abTests'];
+  // New field for `active_ab_tests` metrics payload.
+  activeAbTests?: BridgeHistoryItem['activeAbTests'];
   accountAddress: string;
 };
 
diff --git a/packages/bridge-status-controller/src/utils/metrics.test.ts b/packages/bridge-status-controller/src/utils/metrics.test.ts
index 2d17838369e..af239fbbb2c 100644
--- a/packages/bridge-status-controller/src/utils/metrics.test.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.test.ts
@@ -1,4 +1,9 @@
-import { StatusTypes, FeeType, ActionTypes } from '@metamask/bridge-controller';
+import {
+  StatusTypes,
+  FeeType,
+  ActionTypes,
+  MetaMetricsSwapsEventSource,
+} from '@metamask/bridge-controller';
 import {
   MetricsSwapType,
   MetricsActionType,
@@ -17,6 +22,7 @@ import {
   getTradeDataFromHistory,
   getRequestMetadataFromHistory,
   getEVMTxPropertiesFromTransactionMeta,
+  getPreConfirmationPropertiesFromQuote,
 } from './metrics';
 import type { BridgeHistoryItem } from '../types';
 
@@ -964,6 +970,34 @@ describe('metrics utils', () => {
     });
   });
 
+  describe('getPreConfirmationPropertiesFromQuote', () => {
+    it('should include both ab_tests and active_ab_tests when both sets are provided', () => {
+      const abTests = { token_details_layout: 'treatment' };
+      const activeAbTests = { bridge_quote_sorting: 'variant_b' };
+      const result = getPreConfirmationPropertiesFromQuote(
+        {
+          quote: mockHistoryItem.quote,
+          estimatedProcessingTimeInSeconds: 900,
+          adjustedReturn: { usd: '1980' },
+          sentAmount: { usd: '2000' },
+          gasFee: { effective: { usd: '2.54739' } },
+        } as never,
+        false,
+        false,
+        MetaMetricsSwapsEventSource.MainView,
+        abTests,
+        activeAbTests,
+      );
+
+      expect(result).toStrictEqual(
+        expect.objectContaining({
+          ab_tests: abTests,
+          active_ab_tests: activeAbTests,
+        }),
+      );
+    });
+  });
+
   describe('getEVMSwapTxPropertiesFromTransactionMeta', () => {
     const mockTransactionMeta: TransactionMeta = {
       id: 'test-tx-id',
diff --git a/packages/bridge-status-controller/src/utils/metrics.ts b/packages/bridge-status-controller/src/utils/metrics.ts
index 462a92025aa..7274f943b0a 100644
--- a/packages/bridge-status-controller/src/utils/metrics.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.ts
@@ -177,7 +177,8 @@ export const getPriceImpactFromQuote = (
  * @param isStxEnabledOnClient - Whether smart transactions are enabled on the client, for example the getSmartTransactionsEnabled selector value from the extension
  * @param isHardwareAccount - whether the tx is submitted using a hardware wallet
  * @param location - The entry point from which the user initiated the swap or bridge (e.g. Main View, Token View, Trending Explore)
- * @param abTests - A/B test context to attribute events to specific experiments
+ * @param abTests - Legacy A/B test context for `ab_tests` (backward compatibility)
+ * @param activeAbTests - New A/B test context for `active_ab_tests` (migration target)
  * @returns The properties for the pre-confirmation event
  */
 export const getPreConfirmationPropertiesFromQuote = (
@@ -186,6 +187,7 @@ export const getPreConfirmationPropertiesFromQuote = (
   isHardwareAccount: boolean,
   location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
   abTests?: Record<string, string>,
+  activeAbTests?: Record<string, string>,
 ) => {
   const { quote } = quoteResponse;
   return {
@@ -205,7 +207,14 @@ export const getPreConfirmationPropertiesFromQuote = (
     action_type: MetricsActionType.SWAPBRIDGE_V1,
     custom_slippage: false, // TODO detect whether the user changed the default slippage
     location,
-    ...(abTests && Object.keys(abTests).length > 0 && { ab_tests: abTests }),
+    ...(abTests &&
+      Object.keys(abTests).length > 0 && {
+        ab_tests: abTests,
+      }),
+    ...(activeAbTests &&
+      Object.keys(activeAbTests).length > 0 && {
+        active_ab_tests: activeAbTests,
+      }),
   };
 };
 

From fccc363c6205ef2f8455ed3b23deae7f34512073 Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Mon, 9 Mar 2026 20:22:42 +0100
Subject: [PATCH 2/8] chore: changelog

---
 packages/bridge-controller/CHANGELOG.md        | 2 +-
 packages/bridge-status-controller/CHANGELOG.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/bridge-controller/CHANGELOG.md b/packages/bridge-controller/CHANGELOG.md
index cdd1d58ad08..7f8f39eb4f0 100644
--- a/packages/bridge-controller/CHANGELOG.md
+++ b/packages/bridge-controller/CHANGELOG.md
@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Widen `RequiredEventContextFromClient` `InputChanged.input_amount_preset` to accept arbitrary string labels (for example `85%`, `95%`, `MAX`) while preserving compatibility with `InputAmountPreset` enum values. ([#8069](https://github.com/MetaMask/core/pull/8069))
-- Include optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`.
+- Include optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ## [67.3.0]
 
diff --git a/packages/bridge-status-controller/CHANGELOG.md b/packages/bridge-status-controller/CHANGELOG.md
index 946265b6e23..a6c06c5a72d 100644
--- a/packages/bridge-status-controller/CHANGELOG.md
+++ b/packages/bridge-status-controller/CHANGELOG.md
@@ -13,7 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added optional `abTests` parameter to `StartPollingForBridgeTxStatusArgs` ([#8007](https://github.com/MetaMask/core/pull/8007))
 - Added optional `abTests` parameter to `submitTx` and `submitIntent` methods for A/B test experiment attribution ([#8007](https://github.com/MetaMask/core/pull/8007))
 - `trackUnifiedSwapBridgeEvent` now resolves `ab_tests` from event properties or transaction history and includes it in emitted events ([#8007](https://github.com/MetaMask/core/pull/8007))
-- Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`.
+- Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ### Changed
 

From fd0c1946885d030164d229f10436dd111a8fed68 Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 13:03:52 +0100
Subject: [PATCH 3/8] fix: format submitIntent destructuring after merge

---
 .../src/bridge-status-controller.ts                      | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/packages/bridge-status-controller/src/bridge-status-controller.ts b/packages/bridge-status-controller/src/bridge-status-controller.ts
index b298ae06198..fa17d5dce36 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.ts
@@ -1618,13 +1618,8 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     abTests?: Record<string, string>;
     activeAbTests?: Record<string, string>;
   }): Promise<Pick<TransactionMeta, 'id' | 'chainId' | 'type' | 'status'>> => {
-    const {
-      quoteResponse,
-      accountAddress,
-      location,
-      abTests,
-      activeAbTests,
-    } = params;
+    const { quoteResponse, accountAddress, location, abTests, activeAbTests } =
+      params;
 
     this.messenger.call(
       'BridgeController:stopPollingForQuotes',

From 384cfdfef81d6ff4ba5fa9bc93863dd0b02d974f Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 13:09:04 +0100
Subject: [PATCH 4/8] chore: changloe

---
 packages/bridge-controller/CHANGELOG.md        | 2 +-
 packages/bridge-status-controller/CHANGELOG.md | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/bridge-controller/CHANGELOG.md b/packages/bridge-controller/CHANGELOG.md
index d30e21ce036..e503e13c984 100644
--- a/packages/bridge-controller/CHANGELOG.md
+++ b/packages/bridge-controller/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **BREAKING:** Optional constructor option `getUseAssetsControllerForRates`: when it returns true, exchange rates are read from the new `@metamask/assets-controller` (`AssetsController:getExchangeRatesForBridge`) instead of `MultichainAssetsRatesController`, `TokenRatesController`, and `CurrencyRateController`. ([#8090](https://github.com/MetaMask/core/pull/8090))
 - Add `AssetPickerOpened` unified swap bridge metrics event with an `asset_location` property to indicate `'source'` or `'destination'`. ([#7985](https://github.com/MetaMask/core/pull/7985))
+- Add optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ### Changed
 
@@ -34,7 +35,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Widen `RequiredEventContextFromClient` `InputChanged.input_amount_preset` to accept arbitrary string labels (for example `85%`, `95%`, `MAX`) while preserving compatibility with `InputAmountPreset` enum values. ([#8069](https://github.com/MetaMask/core/pull/8069))
-- Include optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ## [67.3.0]
 
diff --git a/packages/bridge-status-controller/CHANGELOG.md b/packages/bridge-status-controller/CHANGELOG.md
index 3954b107546..f18df50fd4d 100644
--- a/packages/bridge-status-controller/CHANGELOG.md
+++ b/packages/bridge-status-controller/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
+
 ### Changed
 
 - Bump `@metamask/transaction-controller` from `^62.19.0` to `^62.20.0` ([#8104](https://github.com/MetaMask/core/pull/8104))
@@ -19,7 +22,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added optional `abTests` parameter to `StartPollingForBridgeTxStatusArgs` ([#8007](https://github.com/MetaMask/core/pull/8007))
 - Added optional `abTests` parameter to `submitTx` and `submitIntent` methods for A/B test experiment attribution ([#8007](https://github.com/MetaMask/core/pull/8007))
 - `trackUnifiedSwapBridgeEvent` now resolves `ab_tests` from event properties or transaction history and includes it in emitted events ([#8007](https://github.com/MetaMask/core/pull/8007))
-- Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ### Changed
 

From ad4b7f24ec6ba66a64718e8d71b9d76cc3c96f76 Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 15:28:55 +0100
Subject: [PATCH 5/8] fix: activeAbTests as array of objects

---
 packages/bridge-controller/src/utils/metrics/types.ts       | 4 ++--
 .../src/bridge-status-controller.test.ts                    | 4 ++--
 .../src/bridge-status-controller.ts                         | 6 +++---
 packages/bridge-status-controller/src/types.ts              | 3 ++-
 packages/bridge-status-controller/src/utils/metrics.test.ts | 2 +-
 packages/bridge-status-controller/src/utils/metrics.ts      | 4 ++--
 6 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/packages/bridge-controller/src/utils/metrics/types.ts b/packages/bridge-controller/src/utils/metrics/types.ts
index 4173120cd05..080a0b149d0 100644
--- a/packages/bridge-controller/src/utils/metrics/types.ts
+++ b/packages/bridge-controller/src/utils/metrics/types.ts
@@ -254,7 +254,7 @@ export type RequiredEventContextFromClient = {
   [K in keyof RequiredEventContextFromClientBase]: RequiredEventContextFromClientBase[K] & {
     location?: MetaMetricsSwapsEventSource;
     ab_tests?: Record<string, string>;
-    active_ab_tests?: Record<string, string>;
+    active_ab_tests?: Record<string, string>[];
   };
 };
 
@@ -328,7 +328,7 @@ export type CrossChainSwapsEventProperties<
       action_type: MetricsActionType;
       location: MetaMetricsSwapsEventSource;
       ab_tests?: Record<string, string>;
-      active_ab_tests?: Record<string, string>;
+      active_ab_tests?: Record<string, string>[];
     }
   | Pick<EventPropertiesFromControllerState, T>[T]
   | Pick<RequiredEventContextFromClient, T>[T];
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.test.ts b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
index 10e2743fcfd..0ee94d4cf19 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.test.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
@@ -4263,7 +4263,7 @@ describe('BridgeStatusController', () => {
             srcTxHash: '0xsrcTxHashAbTests',
           }),
           abTests: { token_details_layout: 'treatment' },
-          activeAbTests: { bridge_quote_sorting: 'variant_b' },
+          activeAbTests: [{ bridge_quote_sorting: 'variant_b' }],
         });
 
         const messengerCallSpy = jest.spyOn(mockBridgeStatusMessenger, 'call');
@@ -4285,7 +4285,7 @@ describe('BridgeStatusController', () => {
           expect.anything(),
           expect.objectContaining({
             ab_tests: { token_details_layout: 'treatment' },
-            active_ab_tests: { bridge_quote_sorting: 'variant_b' },
+            active_ab_tests: [{ bridge_quote_sorting: 'variant_b' }],
           }),
         );
       });
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.ts b/packages/bridge-status-controller/src/bridge-status-controller.ts
index fa17d5dce36..9e389b38d5c 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.ts
@@ -1321,7 +1321,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     quotesReceivedContext?: RequiredEventContextFromClient[UnifiedSwapBridgeEventName.QuotesReceived],
     location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
     abTests?: Record<string, string>,
-    activeAbTests?: Record<string, string>,
+    activeAbTests?: Record<string, string>[],
   ): Promise<TransactionMeta & Partial<SolanaTransactionMeta>> => {
     this.messenger.call(
       'BridgeController:stopPollingForQuotes',
@@ -1616,7 +1616,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     accountAddress: string;
     location?: MetaMetricsSwapsEventSource;
     abTests?: Record<string, string>;
-    activeAbTests?: Record<string, string>;
+    activeAbTests?: Record<string, string>[];
   }): Promise<Pick<TransactionMeta, 'id' | 'chainId' | 'type' | 'status'>> => {
     const { quoteResponse, accountAddress, location, abTests, activeAbTests } =
       params;
@@ -1856,7 +1856,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
           ab_tests: resolvedAbTests,
         }),
       ...(resolvedActiveAbTests &&
-        Object.keys(resolvedActiveAbTests).length > 0 && {
+        resolvedActiveAbTests.length > 0 && {
           active_ab_tests: resolvedActiveAbTests,
         }),
     };
diff --git a/packages/bridge-status-controller/src/types.ts b/packages/bridge-status-controller/src/types.ts
index 2d5dcccbe29..9cc148f5958 100644
--- a/packages/bridge-status-controller/src/types.ts
+++ b/packages/bridge-status-controller/src/types.ts
@@ -146,8 +146,9 @@ export type BridgeHistoryItem = {
   /**
    * New A/B test metrics context (`active_ab_tests`) that replaces `ab_tests`.
    * Kept separate so migration can run both payloads in parallel.
+   * This field is an array of test objects.
    */
-  activeAbTests?: Record<string, string>;
+  activeAbTests?: Record<string, string>[];
   /**
    * Attempts tracking for exponential backoff on failed fetches.
    * We track the number of attempts and the last attempt time for each txMetaId that has failed at least once
diff --git a/packages/bridge-status-controller/src/utils/metrics.test.ts b/packages/bridge-status-controller/src/utils/metrics.test.ts
index af239fbbb2c..a068a52d585 100644
--- a/packages/bridge-status-controller/src/utils/metrics.test.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.test.ts
@@ -973,7 +973,7 @@ describe('metrics utils', () => {
   describe('getPreConfirmationPropertiesFromQuote', () => {
     it('should include both ab_tests and active_ab_tests when both sets are provided', () => {
       const abTests = { token_details_layout: 'treatment' };
-      const activeAbTests = { bridge_quote_sorting: 'variant_b' };
+      const activeAbTests = [{ bridge_quote_sorting: 'variant_b' }];
       const result = getPreConfirmationPropertiesFromQuote(
         {
           quote: mockHistoryItem.quote,
diff --git a/packages/bridge-status-controller/src/utils/metrics.ts b/packages/bridge-status-controller/src/utils/metrics.ts
index 7274f943b0a..cbf0d3e7c22 100644
--- a/packages/bridge-status-controller/src/utils/metrics.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.ts
@@ -187,7 +187,7 @@ export const getPreConfirmationPropertiesFromQuote = (
   isHardwareAccount: boolean,
   location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
   abTests?: Record<string, string>,
-  activeAbTests?: Record<string, string>,
+  activeAbTests?: Record<string, string>[],
 ) => {
   const { quote } = quoteResponse;
   return {
@@ -212,7 +212,7 @@ export const getPreConfirmationPropertiesFromQuote = (
         ab_tests: abTests,
       }),
     ...(activeAbTests &&
-      Object.keys(activeAbTests).length > 0 && {
+      activeAbTests.length > 0 && {
         active_ab_tests: activeAbTests,
       }),
   };

From cb4e503119a401e90654588f7eb11c2a16df8ecf Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 16:41:03 +0100
Subject: [PATCH 6/8] Fix active_ab_tests typing

---
 packages/bridge-controller/src/utils/metrics/types.ts       | 4 ++--
 .../src/bridge-status-controller.test.ts                    | 6 ++++--
 .../src/bridge-status-controller.ts                         | 4 ++--
 packages/bridge-status-controller/src/types.ts              | 2 +-
 packages/bridge-status-controller/src/utils/metrics.test.ts | 4 +++-
 packages/bridge-status-controller/src/utils/metrics.ts      | 2 +-
 6 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/packages/bridge-controller/src/utils/metrics/types.ts b/packages/bridge-controller/src/utils/metrics/types.ts
index 080a0b149d0..df0396cfe5e 100644
--- a/packages/bridge-controller/src/utils/metrics/types.ts
+++ b/packages/bridge-controller/src/utils/metrics/types.ts
@@ -254,7 +254,7 @@ export type RequiredEventContextFromClient = {
   [K in keyof RequiredEventContextFromClientBase]: RequiredEventContextFromClientBase[K] & {
     location?: MetaMetricsSwapsEventSource;
     ab_tests?: Record<string, string>;
-    active_ab_tests?: Record<string, string>[];
+    active_ab_tests?: { key: string; value: string }[];
   };
 };
 
@@ -328,7 +328,7 @@ export type CrossChainSwapsEventProperties<
       action_type: MetricsActionType;
       location: MetaMetricsSwapsEventSource;
       ab_tests?: Record<string, string>;
-      active_ab_tests?: Record<string, string>[];
+      active_ab_tests?: { key: string; value: string }[];
     }
   | Pick<EventPropertiesFromControllerState, T>[T]
   | Pick<RequiredEventContextFromClient, T>[T];
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.test.ts b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
index 0ee94d4cf19..c336673ce2a 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.test.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.test.ts
@@ -4263,7 +4263,7 @@ describe('BridgeStatusController', () => {
             srcTxHash: '0xsrcTxHashAbTests',
           }),
           abTests: { token_details_layout: 'treatment' },
-          activeAbTests: [{ bridge_quote_sorting: 'variant_b' }],
+          activeAbTests: [{ key: 'bridge_quote_sorting', value: 'variant_b' }],
         });
 
         const messengerCallSpy = jest.spyOn(mockBridgeStatusMessenger, 'call');
@@ -4285,7 +4285,9 @@ describe('BridgeStatusController', () => {
           expect.anything(),
           expect.objectContaining({
             ab_tests: { token_details_layout: 'treatment' },
-            active_ab_tests: [{ bridge_quote_sorting: 'variant_b' }],
+            active_ab_tests: [
+              { key: 'bridge_quote_sorting', value: 'variant_b' },
+            ],
           }),
         );
       });
diff --git a/packages/bridge-status-controller/src/bridge-status-controller.ts b/packages/bridge-status-controller/src/bridge-status-controller.ts
index 9e389b38d5c..144a68f470a 100644
--- a/packages/bridge-status-controller/src/bridge-status-controller.ts
+++ b/packages/bridge-status-controller/src/bridge-status-controller.ts
@@ -1321,7 +1321,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     quotesReceivedContext?: RequiredEventContextFromClient[UnifiedSwapBridgeEventName.QuotesReceived],
     location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
     abTests?: Record<string, string>,
-    activeAbTests?: Record<string, string>[],
+    activeAbTests?: { key: string; value: string }[],
   ): Promise<TransactionMeta & Partial<SolanaTransactionMeta>> => {
     this.messenger.call(
       'BridgeController:stopPollingForQuotes',
@@ -1616,7 +1616,7 @@ export class BridgeStatusController extends StaticIntervalPollingController<Brid
     accountAddress: string;
     location?: MetaMetricsSwapsEventSource;
     abTests?: Record<string, string>;
-    activeAbTests?: Record<string, string>[];
+    activeAbTests?: { key: string; value: string }[];
   }): Promise<Pick<TransactionMeta, 'id' | 'chainId' | 'type' | 'status'>> => {
     const { quoteResponse, accountAddress, location, abTests, activeAbTests } =
       params;
diff --git a/packages/bridge-status-controller/src/types.ts b/packages/bridge-status-controller/src/types.ts
index 9cc148f5958..7473c502d49 100644
--- a/packages/bridge-status-controller/src/types.ts
+++ b/packages/bridge-status-controller/src/types.ts
@@ -148,7 +148,7 @@ export type BridgeHistoryItem = {
    * Kept separate so migration can run both payloads in parallel.
    * This field is an array of test objects.
    */
-  activeAbTests?: Record<string, string>[];
+  activeAbTests?: { key: string; value: string }[];
   /**
    * Attempts tracking for exponential backoff on failed fetches.
    * We track the number of attempts and the last attempt time for each txMetaId that has failed at least once
diff --git a/packages/bridge-status-controller/src/utils/metrics.test.ts b/packages/bridge-status-controller/src/utils/metrics.test.ts
index a068a52d585..b7475214048 100644
--- a/packages/bridge-status-controller/src/utils/metrics.test.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.test.ts
@@ -973,7 +973,9 @@ describe('metrics utils', () => {
   describe('getPreConfirmationPropertiesFromQuote', () => {
     it('should include both ab_tests and active_ab_tests when both sets are provided', () => {
       const abTests = { token_details_layout: 'treatment' };
-      const activeAbTests = [{ bridge_quote_sorting: 'variant_b' }];
+      const activeAbTests = [
+        { key: 'bridge_quote_sorting', value: 'variant_b' },
+      ];
       const result = getPreConfirmationPropertiesFromQuote(
         {
           quote: mockHistoryItem.quote,
diff --git a/packages/bridge-status-controller/src/utils/metrics.ts b/packages/bridge-status-controller/src/utils/metrics.ts
index cbf0d3e7c22..e24188fb114 100644
--- a/packages/bridge-status-controller/src/utils/metrics.ts
+++ b/packages/bridge-status-controller/src/utils/metrics.ts
@@ -187,7 +187,7 @@ export const getPreConfirmationPropertiesFromQuote = (
   isHardwareAccount: boolean,
   location: MetaMetricsSwapsEventSource = MetaMetricsSwapsEventSource.MainView,
   abTests?: Record<string, string>,
-  activeAbTests?: Record<string, string>[],
+  activeAbTests?: { key: string; value: string }[],
 ) => {
   const { quote } = quoteResponse;
   return {

From b9f09873b62a4cc10ecb0ac2158f9020341f1e7a Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 17:11:50 +0100
Subject: [PATCH 7/8] chore: changelog

---
 packages/bridge-controller/CHANGELOG.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/bridge-controller/CHANGELOG.md b/packages/bridge-controller/CHANGELOG.md
index d503f97f4b1..5df1e17952c 100644
--- a/packages/bridge-controller/CHANGELOG.md
+++ b/packages/bridge-controller/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
+
 ## [69.0.1]
 
 ### Changed
@@ -20,7 +24,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **BREAKING:** Optional constructor option `getUseAssetsControllerForRates`: when it returns true, exchange rates are read from the new `@metamask/assets-controller` (`AssetsController:getExchangeRatesForBridge`) instead of `MultichainAssetsRatesController`, `TokenRatesController`, and `CurrencyRateController`. ([#8090](https://github.com/MetaMask/core/pull/8090))
 - Add `AssetPickerOpened` unified swap bridge metrics event with an `asset_location` property to indicate `'source'` or `'destination'`. ([#7985](https://github.com/MetaMask/core/pull/7985))
-- Add optional `active_ab_tests` property in Unified SwapBridge metrics event context and payload types, alongside existing `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ### Changed
 

From 11de6f26ef3ab13e589fa44b05e3cb546a631523 Mon Sep 17 00:00:00 2001
From: Bryan Fullam <bryan.fullam@consensys.net>
Date: Tue, 10 Mar 2026 17:20:11 +0100
Subject: [PATCH 8/8] chore: changelog formatting

---
 packages/bridge-status-controller/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/bridge-status-controller/CHANGELOG.md b/packages/bridge-status-controller/CHANGELOG.md
index 8f755f7e161..bd397d6b0ae 100644
--- a/packages/bridge-status-controller/CHANGELOG.md
+++ b/packages/bridge-status-controller/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+
 - Added optional `activeAbTests` context support so Unified SwapBridge events can include `active_ab_tests` independently of `ab_tests`. ([#8152](https://github.com/MetaMask/core/pull/8152))
 
 ## [68.0.2]