Filter out falsey opts in /relations API hits

spec/unit/utils.spec.ts

@@ -26,6 +26,15 @@ describe("utils", function() {
                 "foo=bar&baz=beer%40",
             );
         });
+
+        it("should handle boolean and numeric values", function() {
+            const params = {
+                string: "foobar",
+                number: 12345,
+                boolean: false,
+            };
+            expect(utils.encodeParams(params)).toEqual("string=foobar&number=12345&boolean=false");
+        });
     });
 
     describe("encodeUri", function() {

src/@types/requests.ts

@@ -143,7 +143,7 @@ export interface IBindThreePidBody {
 export interface IRelationsRequestOpts {
     from?: string;
     to?: string;
-    limit?: string;
+    limit?: number;
 }
 
 export interface IRelationsResponse {

src/client.ts

@@ -6763,11 +6763,7 @@ export class MatrixClient extends EventEmitter {
         eventType?: EventType | string | null,
         opts: IRelationsRequestOpts = {},
     ): Promise<IRelationsResponse> {
-        const params = new URLSearchParams();
-        for (const [key, val] of Object.entries(opts)) {
-            params.set(key, val);
-        }
-        const queryString = params.toString();
+        const queryString = utils.encodeParams(opts as Record<string, string | number>);
 
         let templatedUrl = "/rooms/$roomId/relations/$eventId";
         if (relationType !== null) templatedUrl += "/$relationType";

src/utils.ts

@@ -27,12 +27,19 @@ import type NodeCrypto from "crypto";
 
 /**
  * Encode a dictionary of query parameters.
+ * Omits any undefined/null values.
  * @param {Object} params A dict of key/values to encode e.g.
  * {"foo": "bar", "baz": "taz"}
  * @return {string} The encoded string e.g. foo=bar&baz=taz
  */
-export function encodeParams(params: Record<string, string>): string {
-    return new URLSearchParams(params).toString();
+export function encodeParams(params: Record<string, string | number | boolean>): string {
+    const searchParams = new URLSearchParams();
+    for (const [key, val] of Object.entries(params)) {
+        if (val !== undefined && val !== null) {
+            searchParams.set(key, String(val));
+        }
+    }
+    return searchParams.toString();
 }
 
 export type QueryDict = Record<string, string | string[]>;