diff --git a/lib/event_processor/event_builder/log_event.ts b/lib/event_processor/event_builder/log_event.ts
index 6266d8a5a..c4132567e 100644
--- a/lib/event_processor/event_builder/log_event.ts
+++ b/lib/event_processor/event_builder/log_event.ts
@@ -13,14 +13,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import {
-  EventTags,
-  ConversionEvent,
-  ImpressionEvent,
-  UserEvent,
-} from './user_event';
+import { ConversionEvent, ImpressionEvent, UserEvent } from './user_event';
 
 import { LogEvent } from '../event_dispatcher/event_dispatcher';
+import { EventTags } from '../../shared_types';
 
 const ACTIVATE_EVENT_KEY = 'campaign_activated'
 const CUSTOM_ATTRIBUTE_FEATURE_TYPE = 'custom'
diff --git a/lib/event_processor/event_builder/user_event.ts b/lib/event_processor/event_builder/user_event.ts
index e2e52bedc..e0a91b5ae 100644
--- a/lib/event_processor/event_builder/user_event.ts
+++ b/lib/event_processor/event_builder/user_event.ts
@@ -25,7 +25,7 @@ import {
   ProjectConfig,
 } from '../../project_config/project_config';
 
-import { UserAttributes } from '../../shared_types';
+import { EventTags, UserAttributes } from '../../shared_types';
 import { LoggerFacade } from '../../logging/logger';
 
 export type VisitorAttribute = {
@@ -79,10 +79,6 @@ export type ImpressionEvent = BaseUserEvent & {
   cmabUuid?: string;
 };
 
-export type EventTags = {
-  [key: string]: string | number | null;
-};
-
 export type ConversionEvent = BaseUserEvent & {
   type: 'conversion';
 
diff --git a/lib/optimizely/index.ts b/lib/optimizely/index.ts
index 09b7d47d9..883391e4a 100644
--- a/lib/optimizely/index.ts
+++ b/lib/optimizely/index.ts
@@ -609,8 +609,9 @@ export default class Optimizely extends BaseService implements Client {
    */
   private filterEmptyValues(map: EventTags | undefined): EventTags | undefined {
     for (const key in map) {
-      if (map.hasOwnProperty(key) && (map[key] === null || map[key] === undefined)) {
-        delete map[key];
+      const typedKey = key as keyof EventTags;
+      if (map.hasOwnProperty(typedKey) && (map[typedKey] === null || map[typedKey] === undefined)) {
+        delete map[typedKey];
       }
     }
     return map;
diff --git a/lib/shared_types.ts b/lib/shared_types.ts
index c203613a3..4a727af74 100644
--- a/lib/shared_types.ts
+++ b/lib/shared_types.ts
@@ -89,7 +89,10 @@ export interface UserProfile {
 }
 
 export type EventTags = {
-  [key: string]: string | number | null;
+  revenue?: string | number | null;
+  value?: string | number | null;
+  $opt_event_properties?: Record<string, unknown>;
+  [key: string]: unknown;
 };
 
 export interface UserProfileService {
diff --git a/lib/utils/event_tag_utils/index.ts b/lib/utils/event_tag_utils/index.ts
index 7c4377d76..d50292a39 100644
--- a/lib/utils/event_tag_utils/index.ts
+++ b/lib/utils/event_tag_utils/index.ts
@@ -19,12 +19,10 @@ import {
   PARSED_NUMERIC_VALUE,
   PARSED_REVENUE_VALUE,
 } from 'log_message';
-import { EventTags } from '../../event_processor/event_builder/user_event';
 import { LoggerFacade } from '../../logging/logger';
 
-import {
-  RESERVED_EVENT_KEYWORDS,
-} from '../enums';
+import { RESERVED_EVENT_KEYWORDS } from '../enums';
+import { EventTags } from '../../shared_types';
 
 /**
  * Provides utility method for parsing event tag values
@@ -41,16 +39,18 @@ const VALUE_EVENT_METRIC_NAME = RESERVED_EVENT_KEYWORDS.VALUE;
 export function getRevenueValue(eventTags: EventTags, logger?: LoggerFacade): number | null {
   const rawValue = eventTags[REVENUE_EVENT_METRIC_NAME];
 
-  if (rawValue == null) { // null or undefined event values
+  if (rawValue == null) {
+    // null or undefined event values
     return null;
   }
 
-  const parsedRevenueValue = typeof rawValue === 'string' ? parseInt(rawValue) : rawValue;
+  const parsedRevenueValue = typeof rawValue === 'string' ? parseInt(rawValue) : Math.trunc(rawValue);
 
   if (isFinite(parsedRevenueValue)) {
     logger?.info(PARSED_REVENUE_VALUE, parsedRevenueValue);
     return parsedRevenueValue;
-  } else { // NaN, +/- infinity values
+  } else {
+    // NaN, +/- infinity values
     logger?.info(FAILED_TO_PARSE_REVENUE, rawValue);
     return null;
   }
@@ -65,7 +65,8 @@ export function getRevenueValue(eventTags: EventTags, logger?: LoggerFacade): nu
 export function getEventValue(eventTags: EventTags, logger?: LoggerFacade): number | null {
   const rawValue = eventTags[VALUE_EVENT_METRIC_NAME];
 
-  if (rawValue == null) { // null or undefined event values
+  if (rawValue == null) {
+    // null or undefined event values
     return null;
   }
 
@@ -74,7 +75,8 @@ export function getEventValue(eventTags: EventTags, logger?: LoggerFacade): numb
   if (isFinite(parsedEventValue)) {
     logger?.info(PARSED_NUMERIC_VALUE, parsedEventValue);
     return parsedEventValue;
-  } else { // NaN, +/- infinity values
+  } else {
+    // NaN, +/- infinity values
     logger?.info(FAILED_TO_PARSE_VALUE, rawValue);
     return null;
   }