From 70f106e0963a88ef5844f6343380a9316b863d59 Mon Sep 17 00:00:00 2001
From: Mohsen <56779182+mrtnetwork@users.noreply.github.com>
Date: Tue, 1 Oct 2024 09:50:43 +0330
Subject: [PATCH] Resolve issue with CBOR encoding for large negative integers.

---
 lib/cbor/types/int.dart | 10 ++++++++--
 test/cbor_test.dart     |  1 -
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/cbor/types/int.dart b/lib/cbor/types/int.dart
index 939d1c3..8f2d26d 100644
--- a/lib/cbor/types/int.dart
+++ b/lib/cbor/types/int.dart
@@ -19,8 +19,14 @@ class CborIntValue implements CborNumeric {
   @override
   List<int> encode() {
     final bytes = CborBytesTracker();
-    bytes.pushInt(value.isNegative ? MajorTags.negInt : MajorTags.posInt,
-        value.isNegative ? ~value : value);
+    if (value.bitLength > 31 && value.isNegative) {
+      final value = (~BigInt.parse(this.value.toString())).toInt();
+      bytes.pushInt(MajorTags.negInt, value);
+    } else {
+      // print("is here lower!");
+      bytes.pushInt(value.isNegative ? MajorTags.negInt : MajorTags.posInt,
+          value.isNegative ? ~value : value);
+    }
     return bytes.toBytes();
   }
 
diff --git a/test/cbor_test.dart b/test/cbor_test.dart
index 1972854..ecc8113 100644
--- a/test/cbor_test.dart
+++ b/test/cbor_test.dart
@@ -106,7 +106,6 @@ void _decodeDateTime() {
 }
 
 void main() {
-  // decode
   test("cbor decode", () {
     _decodeInt();
     _decodeFloat();