From fb671952e9957bb6239d78ff54e3494a1c1615e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9A=D0=B8=D1=80=D0=B8=D0=BB=D0=BB=20=D0=92=D0=B5=D1=82?=
 =?UTF-8?q?=D1=80=D0=BE=D0=B2?= <vetrovk@gmail.com>
Date: Mon, 22 Jun 2026 10:41:33 +0300
Subject: [PATCH] fix: preserve zero input in Node API

---
 src/core/Dish.mjs               |  7 ++++---
 src/node/api.mjs                |  2 +-
 tests/node/tests/NodeDish.mjs   |  3 +++
 tests/node/tests/nodeApi.mjs    | 10 ++++++++++
 tests/node/tests/operations.mjs |  7 +++++++
 5 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/src/core/Dish.mjs b/src/core/Dish.mjs
index 11b1ff9f..dc8672e6 100755
--- a/src/core/Dish.mjs
+++ b/src/core/Dish.mjs
@@ -37,17 +37,18 @@ class Dish {
     constructor(dishOrInput=null, type = null) {
         this.value = new ArrayBuffer(0);
         this.type = Dish.ARRAY_BUFFER;
+        const hasInput = Boolean(dishOrInput) || dishOrInput === 0;
 
         // Case: dishOrInput is dish object
-        if (dishOrInput &&
+        if (hasInput &&
             Object.prototype.hasOwnProperty.call(dishOrInput, "value") &&
             Object.prototype.hasOwnProperty.call(dishOrInput, "type")) {
             this.set(dishOrInput.value, dishOrInput.type);
         // input and type defined separately
-        } else if (dishOrInput && type !== null) {
+        } else if (hasInput && type !== null) {
             this.set(dishOrInput, type);
         // No type declared, so infer it.
-        } else if (dishOrInput) {
+        } else if (hasInput) {
             const inferredType = Dish.typeEnum(dishOrInput.constructor.name);
             this.set(dishOrInput, inferredType);
         }
diff --git a/src/node/api.mjs b/src/node/api.mjs
index f41feb23..092dd1fd 100644
--- a/src/node/api.mjs
+++ b/src/node/api.mjs
@@ -98,7 +98,7 @@ function transformArgs(opArgsList, newArgs) {
  * @param input
  */
 function ensureIsDish(input) {
-    if (!input) {
+    if (!input && input !== 0) {
         return new NodeDish();
     }
 
diff --git a/tests/node/tests/NodeDish.mjs b/tests/node/tests/NodeDish.mjs
index 3ec8b7e2..43a07c8c 100644
--- a/tests/node/tests/NodeDish.mjs
+++ b/tests/node/tests/NodeDish.mjs
@@ -38,6 +38,9 @@ TestRegister.addApiTests([
         const numberDish = new Dish(333);
         assert.strictEqual(numberDish.type, 2);
 
+        const zeroDish = new Dish(0);
+        assert.strictEqual(zeroDish.type, 2);
+
         const arrayBufferDish = new Dish(Buffer.from("some buffer input").buffer);
         assert.strictEqual(arrayBufferDish.type, 4);
 
diff --git a/tests/node/tests/nodeApi.mjs b/tests/node/tests/nodeApi.mjs
index 5f2476ee..d52bd458 100644
--- a/tests/node/tests/nodeApi.mjs
+++ b/tests/node/tests/nodeApi.mjs
@@ -97,6 +97,11 @@ TestRegister.addApiTests([
         assert(result instanceof NodeDish);
     }),
 
+    it("should preserve numeric zero input", () => {
+        const result = chef.toHex(0);
+        assert.strictEqual(result.toString(), "30");
+    }),
+
     it("should coerce to a string as you expect", () => {
         const result = chef.fromBase32(chef.toBase32("something"));
         assert.equal(String(result), "something");
@@ -180,6 +185,11 @@ TestRegister.addApiTests([
         assert.strictEqual(result.toString(), "ONXW2ZJANFXHA5LU");
     }),
 
+    it("chef.bake: should preserve numeric zero input", async () => {
+        const result = await chef.bake(0, "to hex");
+        assert.strictEqual(result.toString(), "30");
+    }),
+
     it("chef.bake: should complain if recipe isnt a valid object", async () => {
         await assert.rejects(() => chef.bake("some input", 3264), {
             name: "TypeError",
diff --git a/tests/node/tests/operations.mjs b/tests/node/tests/operations.mjs
index 6cf85718..5300b3ef 100644
--- a/tests/node/tests/operations.mjs
+++ b/tests/node/tests/operations.mjs
@@ -59,6 +59,13 @@ TestRegister.addApiTests([
         assert.strictEqual(result.toString(), "7");
     }),
 
+    it("ADD: preserves numeric zero input", () => {
+        const result = chef.ADD(0, {
+            key: "4",
+        });
+        assert.strictEqual(result.toString(), "4");
+    }),
+
     it("addLineNumbers: No arguments", () => {
         const result = addLineNumbers("sample input");
         assert.equal(result.toString(), "1 sample input");