events-node: update EventParams type

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/stale-roses-serve.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-events-node': patch
+---
+
+The `EventParams` payload must now be a `JsonValue`, and the `metadata` type has been tweaked.

plugins/events-node/package.json

@@ -51,7 +51,8 @@
     "test": "backstage-cli package test"
   },
   "dependencies": {
-    "@backstage/backend-plugin-api": "workspace:^"
+    "@backstage/backend-plugin-api": "workspace:^",
+    "@backstage/types": "workspace:^"
   },
   "devDependencies": {
     "@backstage/backend-common": "^0.25.0",

plugins/events-node/src/api/EventParams.ts

@@ -14,10 +14,12 @@
  * limitations under the License.
  */
 
+import { JsonValue } from '@backstage/types';
+
 /**
  * @public
  */
-export interface EventParams<TPayload = unknown> {
+export interface EventParams<TPayload extends JsonValue = JsonValue> {
   /**
    * Topic for which this event should be published.
    */
@@ -29,5 +31,5 @@ export interface EventParams<TPayload = unknown> {
   /**
    * Metadata (e.g., HTTP headers and similar for events received from external).
    */
-  metadata?: Record<string, string | string[] | undefined>;
+  metadata?: { [name in string]?: string | string[] };
 }

yarn.lock

@@ -6166,6 +6166,7 @@ __metadata:
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/backend-test-utils": "workspace:^"
     "@backstage/cli": "workspace:^"
+    "@backstage/types": "workspace:^"
   languageName: unknown
   linkType: soft