Merge branch 'master' of https://github.com/bsv-blockchain/ts-sdk into TOB-21-Hex

Author: Stephen-Thomson

CHANGELOG.md

@@ -5,6 +5,7 @@ All notable changes to this project will be documented in this file. The format
 ## Table of Contents
 
 - [Unreleased](#unreleased)
+- [1.9.20 - 2025-12-02](#1920---2025-12-02)
 - [1.9.19 - 2025-12-02](#1919---2025-12-02)
 - [1.9.18 - 2025-12-02](#1918---2025-12-02)
 - [1.9.17 - 2025-12-01](#1917---2025-12-01)
@@ -191,6 +192,21 @@ All notable changes to this project will be documented in this file. The format
 ### Security
 ---
 
+### [1.9.20] - 2025-12-02
+
+### Security
+
+- Corrected ECDSA nonce range validation to strictly follow the specification.
+  The implementation now correctly accepts `k = 1` and `k = n-1` when generating or
+  validating nonces, resolving the issue raised in TOB-23.
+
+### Fixed
+
+- Updated both locations in the ECDSA sign function where the incorrect bound
+  check was performed, ensuring consistent and standards-compliant behavior.
+
+---
+
 ### [1.9.19] - 2025-12-02
 
 ### Added

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@bsv/sdk",
-  "version": "1.9.18",
+  "version": "1.9.19",
   "type": "module",
   "description": "BSV Blockchain Software Development Kit",
   "main": "dist/cjs/mod.js",