🐛 Fix toBigInt and fromBigInt calculations

CHANGELOG.md

@@ -1,5 +1,8 @@
 Changelog
 =========
+#### Version 3.3.4
+* Fix `toBigInt` and `fromBigInt` calculations
+
 #### Version 3.3.3
 * Fix error transaction signature when a value has the 8th decimal > 5
 

lib/src/utils/utils.dart

@@ -1,6 +1,7 @@
 /// SPDX-License-Identifier: AGPL-3.0-or-later
 
 import 'dart:math';
+import 'package:decimal/decimal.dart';
 import 'dart:typed_data';
 import 'package:pinenacl/encoding.dart' show Base16Encoder;
 
@@ -42,7 +43,9 @@ int toBigInt(num? number) {
   if (number == null) {
     return 0;
   }
-  return (number * 100000000).floor();
+  return (Decimal.parse(number.toString()) * Decimal.parse('100000000'))
+      .toDouble()
+      .floor();
 }
 
 /// Convert big int of 10^8 decimals to any number
@@ -51,7 +54,8 @@ num fromBigInt(int? number) {
   if (number == null) {
     return 0;
   }
-  return number / 100000000;
+  return (Decimal.parse(number.toString()) / Decimal.parse('100000000'))
+      .toDouble();
 }
 
 /// Convert any number into a byte array

pubspec.lock

@@ -177,6 +177,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.3"
+  decimal:
+    dependency: "direct main"
+    description:
+      name: decimal
+      sha256: "24a261d5d5c87e86c7651c417a5dbdf8bcd7080dd592533910e8d0505a279f21"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.3"
   dependency_validator:
     dependency: "direct dev"
     description:
@@ -545,6 +553,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.2.1"
+  rational:
+    dependency: transitive
+    description:
+      name: rational
+      sha256: ba58e9e18df9abde280e8b10051e4bce85091e41e8e7e411b6cde2e738d357cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
   rxdart:
     dependency: transitive
     description:

pubspec.yaml

@@ -3,7 +3,7 @@ name: archethic_lib_dart
 description: Archethic dart library for Flutter for Node and Browser. This library aims to provide a easy way to create Archethic transaction and to send them over the network
 homepage: https://github.com/archethic-foundation/libdart
 
-version: 3.3.3
+version: 3.3.4
 
 environment:
   sdk: ">=3.1.0 <4.0.0"
@@ -15,6 +15,9 @@ dependencies:
   # Implementations of SHA, MD5, and HMAC cryptographic functions
   crypto: ^3.0.3
 
+  # The decimal package allows you to deal with decimal numbers without losing precision
+  decimal: ^2.3.3
+
   # Package ecdsa implements the Elliptic Curve Digital Signature Algorithm, as defined in FIPS 186-3
   ecdsa: ^0.0.4
 

test/utils_test.dart

@@ -48,6 +48,28 @@ void main() {
     test('should convert a double into a big integer with 10^8', () {
       expect(toBigInt(1.234567), 123456700);
     });
+
+    test('should convert a double into a big integer with 10^8', () {
+      expect(toBigInt(9.95), 995000000);
+    });
+
+    test('should convert a double into a big integer with 10^8', () {
+      expect(toBigInt(0.617714895), 61771489);
+    });
+  });
+
+  group('fromBigInt', () {
+    test('should convert a big integer with 10^8 into double', () {
+      expect(1.234567, fromBigInt(123456700));
+    });
+
+    test('should convert a big integer with 10^8 into double', () {
+      expect(9.95, fromBigInt(995000000));
+    });
+
+    test('should convert a big integer with 10^8 into double', () {
+      expect(0.61771489, fromBigInt(61771489));
+    });
   });
 
   group('toByteArray', () {