update changelog

CHANGELOG.md

@@ -1,11 +1,33 @@
 # Change Log
+
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [2.2.0](https://github.com/LedgerHQ/app-cardano/compare/2.1.0...LedgerHQ:2.2.0) - [TBD]
 
+Support for signing pool registrations by operators.
+
+### Added
+
+- pool cold key derivation, as described in [CIP 1853 - HD Stake Pool Cold Keys for Cardano](https://cips.cardano.org/cips/cip1853/)
+- operational certificate signining
+- new use case for transactions containing pool registration certificate: operators can sign such a transaction with pool cold key
+- in the new use case, pool relays and the VRF key are displayed to the user
+- support for pool retirement certificates in ordinary transactions
+
+### Changed
+
+- pool registration transactions have reworked APDU flow (not compatible with older version of the js library), but ordinary transactions are backwards-compatible
+
+### Fixed
+
+
+
+
+## [2.2.0](https://github.com/LedgerHQ/app-cardano/compare/2.1.0...LedgerHQ:2.2.0) - [February 15th 2021]
+
 Mary and Allegra hardfork-related changes. `signTransaction` call APDU changes are breaking, therefore it won't work properly with [https://www.npmjs.com/package/@cardano-foundation/ledgerjs-hw-app-cardano](ledgerjs-hw-app-cardano) version 2.1.0 and older.
 
 ### Added
@@ -22,7 +44,10 @@ Mary and Allegra hardfork-related changes. `signTransaction` call APDU changes a
 
 ### Fixed
 
-## [2.1.0](https://github.com/LedgerHQ/app-cardano/compare/2.0.5...LedgerHQ:2.1.0) - [January 7th 2020]
+
+
+
+## [2.1.0](https://github.com/LedgerHQ/app-cardano/compare/2.0.5...LedgerHQ:2.1.0) - [January 7th 2021]
 
 Introduced support for stake pool registration certificates for stake pool owners. `signTransaction` call APDU changes are breaking, therefore it won't work properly with [https://www.npmjs.com/package/@cardano-foundation/ledgerjs-hw-app-cardano](ledgerjs-hw-app-cardano) 2.0.1 and older.
 
@@ -38,6 +63,9 @@ d- Support bulk public key export: https://github.com/LedgerHQ/app-cardano/pull/
 
 ### Fixed
 
+
+
+
 ## [2.0.5](https://github.com/LedgerHQ/app-cardano/compare/2.0.4...LedgerHQ:2.0.5) - [November 6th 2020]
 ### Added
 
@@ -47,8 +75,11 @@ d- Support bulk public key export: https://github.com/LedgerHQ/app-cardano/pull/
 
 - Compilation fixes related to Ledger Nano X
 
+
+
+
 ## [2.0.4](https://github.com/LedgerHQ/app-cardano/compare/2.0.3...LedgerHQ:2.0.4) - [August 21st 2020]
- 
+
 ### Added
 
 ### Changed
@@ -57,6 +88,9 @@ d- Support bulk public key export: https://github.com/LedgerHQ/app-cardano/pull/
 
 - Serialize reward address instead of staking key into the withdrawals within the transaction body: https://github.com/LedgerHQ/app-cardano/pull/2
 
+
+
+
 ## [2.0.3](https://github.com/LedgerHQ/app-cardano/compare/2.0.2...LedgerHQ:2.0.3) - [July 31st 2020]
 
 ### Added
@@ -67,6 +101,9 @@ d- Support bulk public key export: https://github.com/LedgerHQ/app-cardano/pull/
 
 - Fix ttl block/epoch calculation to reflect network parameter changes: https://github.com/LedgerHQ/app-cardano/pull/1
 
+
+
+
 ## [2.0.2](https://github.com/LedgerHQ/app-cardano/releases/tag/2.0.2) - [July 29th 2020]
 
 First public release with Shelley-era support. Older, 1.x.x releases of this app are meant for the Byron-era Cardano blockchain and no longer work in the Shelley-era (and newer ones) of the Cardano blockchain.