feat(pass-style,marshal): ByteArray, a binary Passable

endojs · Aug 16, 2024 · eed07e2 · eed07e2
1 parent 7bc95fc
commit eed07e2
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 5 deletions.
diff --git a/packages/pass-style/package.json b/packages/pass-style/package.json
@@ -37,6 +37,7 @@
     "@endo/env-options": "^1.1.5",
     "@endo/errors": "^1.2.4",
     "@endo/eventual-send": "^1.2.4",
+    "@endo/immutable-arraybuffer": "^0.1.0",
     "@endo/promise-kit": "^1.1.4",
     "@fast-check/ava": "^1.1.5"
   },

diff --git a/packages/pass-style/src/byteArray.js b/packages/pass-style/src/byteArray.js
@@ -1,11 +1,15 @@
 import { X } from '@endo/errors';
+import {
+  transferBufferToImmutable,
+  isBufferImmutable,
+} from '@endo/immutable-arraybuffer';
 import { assertChecker } from './passStyle-helpers.js';
 
 const { getPrototypeOf, getOwnPropertyDescriptor } = Object;
 const { ownKeys, apply } = Reflect;
 
-// @ts-expect-error TODO How do I add it to the ArrayBuffer type?
-const AnImmutableArrayBuffer = new ArrayBuffer(0).transferToImmutable();
+const AnImmutableArrayBuffer = transferBufferToImmutable(new ArrayBuffer(0));
+
 /**
  * As proposed, this will be the same as `ArrayBuffer.prototype`. As shimmed,
  * this will be a hidden intrinsic that inherits from `ArrayBuffer.prototype`.
@@ -26,9 +30,7 @@ const immutableGetter = getOwnPropertyDescriptor(
  * @returns {boolean}
  */
 const canBeValid = (candidate, check = undefined) =>
-  (candidate instanceof ArrayBuffer &&
-    // @ts-expect-error TODO How do I add it to the ArrayBuffer type?
-    candidate.immutable) ||
+  (candidate instanceof ArrayBuffer && isBufferImmutable(candidate)) ||
   (!!check && check(false, X`Immutable ArrayBuffer expected: ${candidate}`));
 
 /**