refactor(ocap-kernel): remove dead kslot branches, widen initKernelObject to accept 'kernel' owner

Author: rekmarks

packages/ocap-kernel/src/KernelServiceManager.ts

@@ -4,7 +4,7 @@ import type { Logger } from '@metamask/logger';
 import type { KernelQueue } from './KernelQueue.ts';
 import { kser, kunser } from './liveslots/kernel-marshal.ts';
 import type { KernelStore } from './store/index.ts';
-import type { KRef, EndpointId, KernelMessage } from './types.ts';
+import type { KRef, KernelMessage } from './types.ts';
 import { assert } from './utils/assert.ts';
 
 export type KernelService = {
@@ -77,7 +77,7 @@ export class KernelServiceManager {
     }
     let kref = this.#kernelStore.getKernelServiceKref(name);
     if (!kref) {
-      kref = this.#kernelStore.initKernelObject('kernel' as EndpointId);
+      kref = this.#kernelStore.initKernelObject('kernel');
       this.#kernelStore.setKernelServiceKref(name, kref);
       this.#kernelStore.pinObject(kref);
     }

packages/ocap-kernel/src/liveslots/kernel-marshal.ts

@@ -72,7 +72,7 @@ export function kslot(kref: KRef, iface: string = 'undefined'): SlotValue {
     // eslint-disable-next-line no-param-reassign
     iface = iface.slice(9);
   }
-  if (kref.startsWith('p') || kref.startsWith('kp') || kref.startsWith('rp')) {
+  if (kref.startsWith('kp')) {
     return makeStandinPromise(kref);
   }
   const standinObject = makeDefaultExo(iface, {

packages/ocap-kernel/src/store/methods/object.ts

@@ -25,10 +25,10 @@ export function getObjectMethods(ctx: StoreContext) {
    * corresponds to an object that has just been imported from somewhere. The
    * object is initially unrevoked.
    *
-   * @param owner - The endpoint that is the owner of the new object.
+   * @param owner - The endpoint or 'kernel' that is the owner of the new object.
    * @returns The new object's KRef.
    */
-  function initKernelObject(owner: EndpointId): KRef {
+  function initKernelObject(owner: EndpointId | 'kernel'): KRef {
     const koId = getNextObjectId();
     ctx.kv.set(getOwnerKey(koId), owner);
     setObjectRefCount(koId, { reachable: 1, recognizable: 1 });