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changelog additions, mainly for crypto and finance related tasks

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Konstantinos Chalkias 2017-08-31 16:56:24 +01:00 committed by GitHub
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docs/source/changelog.rst
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@ -70,6 +70,44 @@ UNRELEASED
* Removed the concept of relevancy from ``LinearState``. The ``ContractState``'s relevancy to the vault can be determined
by the flow context, the vault will process any transaction from a flow which is not derived from transaction resolution verification.
* Removed the tolerance attribute from ``TimeWindowChecker`` and thus, there is no extra tolerance on the notary side anymore.
* The ``FungibleAsset`` interface has been made simpler. The ``Commands`` grouping interface
that included the ``Move``, ``Issue`` and ``Exit`` interfaces have all been removed, while the ``move`` function has
been renamed to ``withNewOwnerAndAmount`` to be consistent with the ``withNewOwner`` function of the ``OwnableState``.
* The ``IssueCommand`` interface has been removed from ``Structures``, because, due to the introduction of nonces per
transaction component, the issue command does not need a nonce anymore and it does not require any other attributes.
* As a consequence of the above and the simpler ``FungibleAsset`` format, fungible assets like ``Cash`` now use
``class Issue : TypeOnlyCommandData()``, because it's only its presence (``Issue``) that matters.
* A new `PrivacySalt` transaction component is introduced, which is now an attribute in ``TraversableTransaction`` and
inherently in ``WireTransaction``.
* A new ``nonces: List<SecureHash>`` feature has been added to ``FilteredLeaves``.
* Due to the ``nonces`` and ``PrivacySalt`` introduction, new functions have been added to ``MerkleTransaction``:
``fun <T : Any> serializedHash(x: T, privacySalt: PrivacySalt?, index: Int): SecureHash``
``fun <T : Any> serializedHash(x: T, nonce: SecureHash): SecureHash``
``fun computeNonce(privacySalt: PrivacySalt, index: Int)``.
* A new ``SignatureMetadata`` data class is introduced with two attributes, ``platformVersion: Int`` and
``schemeNumberID: Int`` (the signature scheme used).
* As part of the metadata support in signatures, a new ``data class SignableData(val txId: SecureHash, val signatureMetadata: SignatureMetadata)``
is introduced, which represents the object actually signed.
* The unused ``MetaData`` and ``SignatureType`` in ``crypto`` package have been removed.
* The ``class TransactionSignature(bytes: ByteArray, val by: PublicKey, val signatureMetadata: SignatureMetadata): DigitalSignature(bytes)``
class is now utilised Vs the old ``DigitalSignature.WithKey`` for Corda transaction signatures. Practically, it takes
the ``signatureMetadata`` as an extra input, in order to support signing both the transaction and the extra metadata.
* To reflect changes in the signing process, the ``Crypto`` object is now equipped with the:
``fun doSign(keyPair: KeyPair, signableData: SignableData): TransactionSignature`` and
``fun doVerify(txId: SecureHash, transactionSignature: TransactionSignature): Boolean`` functions.
* ``SerializationCustomization.addToWhitelist()` now accepts multiple classes via varargs.
Milestone 14