Release notes
=============

Here are brief summaries of what's changed between each snapshot release.

Unreleased
----------

Here are changes in git master that haven't yet made it to a snapshot release:

* Made the ``NotaryService`` extensible, we now have both validating and non-validating notaries.
* Added a protocol for changing the notary for a state.
* Every ``ContractState`` now has to specify a *participants* field, which is a list of parties that are able to
  consume this state in a valid transaction. This is used for e.g. making sure all relevant parties obtain the updated
  state when changing a notary.
* Introduced ``TransactionState``, which wraps ``ContractState``, and is used when defining a transaction output.
  The notary field is moved from ``ContractState`` into ``TransactionState``.
* Every transaction now has a *type* field, which specifies custom build & validation rules for that transaction type.
  Currently two types are supported:

  - **General**. Runs the default build and validation logic.
  - **NotaryChange**. Contract code is not run during validation, checks that the notary field is the only difference
    between the inputs and outputs.

* The cash contract has moved from com.r3corda.contracts to com.r3corda.contracts.cash.
* Amount class is now generic, to support non-currency types (such as assets, or currency with additional information).
* Refactored the Cash contract to have a new FungibleAsset superclass, to model all countable assets that can be merged
  and split (currency, barrels of oil, etc.)
* Switched to the ed25519 elliptic curve from secp256r1. Note that this introduces a new external lib dependency.

Milestone 0
-----------

This is the first release, which includes:

* Some initial smart contracts: cash, commercial paper, interest rate swaps
* An interest rate oracle
* The first version of the protocol/orchestration framework
* Some initial support for pluggable consensus mechanisms
* Tutorials and documentation explaining how it works
* Much more ...