Merge 38128830cc into f8a22aab06

Fixes https://github.com/mautrix/whatsapp/issues/662
Fixes https://github.com/element-hq/element-x-ios/issues/1047

portal.go

@@ -3500,6 +3500,13 @@ func (portal *Portal) convertMediaMessage(intent *appservice.IntentAPI, source *
 			return portal.makeMediaBridgeFailureMessage(info, fmt.Errorf("failed to upload media: %w", err), converted, nil, "")
 		}
 	}
+
+	// Sticker events require the URL field to be present https://spec.matrix.org/v1.9/client-server-api/#events-16
+	// This seems to affect only clients based on the Rust SDK on encrypted channels (like Element X)
+	if typeName == "sticker" && converted.Content.File != nil {
+		converted.Extra["url"] = ""
+	}
+
 	return converted
 }