fixup! more

Author: erights

packages/ERTP/src/mathHelpers/natMathHelpers.js

@@ -19,9 +19,6 @@ const empty = 0n;
  * smallest whole unit such that the `natMathHelpers` never deals with
  * fractional parts.
  *
- * For this 'nat' asset kind, the rightBound is always a bigint, since a a
- * fungible number has no "elements" to match against an elementPattern.
- *
  * @type {MathHelpers<'nat', Key, NatValue>}
  */
 export const natMathHelpers = harden({
@@ -33,11 +30,9 @@ export const natMathHelpers = harden({
   },
   doMakeEmpty: () => empty,
   doIsEmpty: nat => nat === empty,
-  doIsGTE: (left, rightBound) =>
-    left >= /** @type {bigint} */ (/** @type {unknown} */ (rightBound)),
+  doIsGTE: (left, right) => left >= right,
   doIsEqual: (left, right) => left === right,
   // BigInts don't observably overflow
   doAdd: (left, right) => left + right,
-  doSubtract: (left, rightBound) =>
-    Nat(left - /** @type {bigint} */ (/** @type {unknown} */ (rightBound))),
+  doSubtract: (left, right) => Nat(left - right),
 });