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406 lines
16 KiB
ReStructuredText
406 lines
16 KiB
ReStructuredText
Upgrading a CorDapp to a new platform version
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=============================================
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These notes provide instructions for upgrading your CorDapps from previous versions, starting with the upgrade from our
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first public Beta (:ref:`Milestone 12 <changelog_m12>`), to :ref:`V1.0 <changelog_v1>`.
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.. contents::
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:depth: 3
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General rules
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-------------
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Always remember to update the version identifiers in your project gradle file:
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.. sourcecode:: shell
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ext.corda_release_version = '1.0.0'
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ext.corda_gradle_plugins_version = '1.0.0'
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It may be necessary to update the version of major dependencies:
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.. sourcecode:: shell
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ext.kotlin_version = '1.1.4'
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ext.quasar_version = '0.7.9'
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Please consult the relevant release notes of the release in question. If not specified, you may assume the
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versions you are currently using are still in force.
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We also strongly recommend cross referencing with the :doc:`changelog` to confirm changes.
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UNRELEASED
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----------
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* For existing contract ORM schemas that extend from ``CommonSchemaV1.LinearState`` or ``CommonSchemaV1.FungibleState``,
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you will need to explicitly map the ``participants`` collection to a database table. Previously this mapping was done
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in the superclass, but that makes it impossible to properly configure the table name. The required changes are to:
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* Add the ``override var participants: MutableSet<AbstractParty>? = null`` field to your class, and
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* Add JPA mappings
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For example:
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.. sourcecode:: kotlin
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@Entity
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@Table(name = "cash_states_v2",
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indexes = arrayOf(Index(name = "ccy_code_idx2", columnList = "ccy_code")))
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class PersistentCashState(
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@ElementCollection
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@Column(name = "participants")
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@CollectionTable(name="cash_states_v2_participants", joinColumns = arrayOf(
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JoinColumn(name = "output_index", referencedColumnName = "output_index"),
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JoinColumn(name = "transaction_id", referencedColumnName = "transaction_id")))
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override var participants: MutableSet<AbstractParty>? = null,
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Testing
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~~~~~~~
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* The registration mechanism for CorDapps in ``MockNetwork`` unit tests has changed:
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* CorDapp registration is now done via the ``cordappPackages`` constructor parameter of MockNetwork. This parameter
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is a list of ``String`` values which should be the package names of the CorDapps containing the contract
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verification code you wish to load
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* The ``unsetCordappPackages`` method is now redundant and has been removed
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V1.0 to V2.0
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------------
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* You need to update the ``corda_release_version`` identifier in your project gradle file. The
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corda_gradle_plugins_version should remain at 1.0.0:
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.. sourcecode:: shell
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ext.corda_release_version = '2.0.0'
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ext.corda_gradle_plugins_version = '1.0.0'
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Public Beta (M12) to V1.0
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-------------------------
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:ref:`From Milestone 14 <changelog_m14>`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Build
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^^^^^
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* MockNetwork has moved. To continue using ``MockNetwork`` for testing, you must add the following dependency to your
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``build.gradle`` file:
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.. sourcecode:: shell
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testCompile "net.corda:corda-node-driver:$corda_release_version"
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.. note:: You may only need ``testCompile "net.corda:corda-test-utils:$corda_release_version"`` if not using the Driver
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DSL
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Configuration
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^^^^^^^^^^^^^
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* ``CordaPluginRegistry`` has been removed:
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* The one remaining configuration item ``customizeSerialisation``, which defined a optional whitelist of types for
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use in object serialization, has been replaced with the ``SerializationWhitelist`` interface which should be
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implemented to define a list of equivalent whitelisted classes
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* You will need to rename your services resource file. 'resources/META-INF/services/net.corda.core.node.CordaPluginRegistry'
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becomes 'resources/META-INF/services/net.corda.core.serialization.SerializationWhitelist'
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* ``MockNode.testPluginRegistries`` was renamed to ``MockNode.testSerializationWhitelists``
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* In general, the ``@CordaSerializable`` annotation is the preferred method for whitelisting, as described in
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:doc:`serialization`
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Missing imports
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^^^^^^^^^^^^^^^
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Use IntelliJ's automatic imports feature to intelligently resolve the new imports:
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* Missing imports for contract types:
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* CommercialPaper and Cash are now contained within the ``finance`` module, as are associated helpers functions. For
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example:
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* ``import net.corda.contracts.ICommercialPaperState`` becomes ``import net.corda.finance.contracts.ICommercialPaperState``
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* ``import net.corda.contracts.asset.sumCashBy`` becomes ``import net.corda.finance.utils.sumCashBy``
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* ``import net.corda.core.contracts.DOLLARS`` becomes ``import net.corda.finance.DOLLARS``
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* ``import net.corda.core.contracts.issued by`` becomes ``import net.corda.finance.issued by``
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* ``import net.corda.contracts.asset.Cash`` becomes ``import net.corda.finance.contracts.asset.Cash``
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* Missing imports for utility functions:
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* Many common types and helper methods have been consolidated into ``net.corda.core.utilities`` package. For example:
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* ``import net.corda.core.crypto.commonName`` becomes ``import net.corda.core.utilities.commonName``
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* ``import net.corda.core.crypto.toBase58String`` becomes ``import net.corda.core.utilities.toBase58String``
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* ``import net.corda.core.getOrThrow`` becomes ``import net.corda.core.utilities.getOrThrow``
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* Missing flow imports:
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* In general, all reusable library flows are contained within the **core** API ``net.corda.core.flows`` package
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* Financial domain library flows are contained within the **finance** module ``net.corda.finance.flows`` package
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* Other flows that have moved include ``import net.corda.core.flows.ResolveTransactionsFlow``, which becomes
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``import net.corda.core.internal.ResolveTransactionsFlow``
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Core data structures
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^^^^^^^^^^^^^^^^^^^^
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* Missing ``Contract`` override:
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* ``Contract.legalContractReference`` has been removed, and replaced by the optional annotation
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``@LegalProseReference(uri = "<URI>")``
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* Unresolved reference:
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* ``AuthenticatedObject`` was renamed to ``CommandWithParties``
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* Overrides nothing:
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* ``LinearState.isRelevant`` was removed. Whether a node stores a ``LinearState`` in its vault depends on whether the
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node is one of the state's ``participants``
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* ``txBuilder.toLedgerTransaction`` now requires a ``ServiceHub`` parameter. This is used by the new Contract
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Constraints functionality to validate and resolve attachments
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Flow framework
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^^^^^^^^^^^^^^
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* ``FlowLogic`` communication has been upgraded to use explicit ``FlowSession`` instances to communicate between nodes:
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* ``FlowLogic.send``/``FlowLogic.receive``/``FlowLogic.sendAndReceive`` has been replaced by ``FlowSession.send``/
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``FlowSession.receive``/``FlowSession.sendAndReceive``. The replacement functions do not take a destination
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parameter, as this is defined implictly by the session used
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* Initiated flows now take in a ``FlowSession`` instead of ``Party`` in their constructor. If you need to access the
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counterparty identity, it is in the ``counterparty`` property of the flow session
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* ``FinalityFlow`` now returns a single ``SignedTransaction``, instead of a ``List<SignedTransaction>``
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* ``TransactionKeyFlow`` was renamed to ``SwapIdentitiesFlow``
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* ``SwapIdentitiesFlow`` must be imported from the *confidential-identities* package ``net.corda.confidential``
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Node services (ServiceHub)
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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* Unresolved reference to ``vaultQueryService``:
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* Replace all references to ``<services>.vaultQueryService`` with ``<services>.vaultService``
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* Previously there were two vault APIs. Now there is a single unified API with the same functions: ``VaultService``.
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* ``FlowLogic.ourIdentity`` has been introduced as a shortcut for retrieving our identity in a flow
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* ``serviceHub.myInfo.legalIdentity`` no longer exists
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* ``getAnyNotary`` has been removed. Use ``serviceHub.networkMapCache.notaryIdentities[0]`` instead
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* ``ServiceHub.networkMapUpdates`` is replaced by ``ServiceHub.networkMapFeed``
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* ``ServiceHub.partyFromX500Name`` is replaced by ``ServiceHub.wellKnownPartyFromX500Name``
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* A "well known" party is one that isn't anonymous. This change was motivated by the confidential identities work
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RPC Client
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^^^^^^^^^^
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* Missing API methods on the ``CordaRPCOps`` interface:
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* ``verifiedTransactionsFeed`` has been replaced by ``internalVerifiedTransactionsFeed``
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* ``verifiedTransactions`` has been replaced by ``internalVerifiedTransactionsSnapshot``
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* These changes are in preparation for the planned integration of Intel SGX™, which will encrypt the transactions
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feed. Apps that use this API will not work on encrypted ledgers. They should generally be modified to use the vault
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query API instead
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* Accessing the ``networkMapCache`` via ``services.nodeInfo().legalIdentities`` returns a list of identities
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* This change is in preparation for allowing a node to host multiple separate identities in the future
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Testing
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^^^^^^^
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Please note that ``Clauses`` have been removed completely as of V1.0. We will be revisiting this capability in a future
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release.
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* CorDapps must be explicitly registered in ``MockNetwork`` unit tests:
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* This is done by calling ``setCordappPackages``, an extension helper function in the ``net.corda.testing`` package,
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on the first line of your ``@Before`` method. This takes a variable number of ``String`` arguments which should be
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the package names of the CorDapps containing the contract verification code you wish to load
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* You should unset CorDapp packages in your ``@After`` method by using ``unsetCordappPackages`` after
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``stopNodes``
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* CorDapps must be explicitly registered in ``DriverDSL`` and ``RPCDriverDSL`` integration tests:
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* You must register package names of the CorDapps containing the contract verification code you wish to load using
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the ``extraCordappPackagesToScan: List<String>`` constructor parameter of the driver DSL
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Finance
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^^^^^^^
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* ``FungibleAsset`` interface simplification:
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* The ``Commands`` grouping interface that included the ``Move``, ``Issue`` and ``Exit`` interfaces has been removed
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* The ``move`` function has been renamed to ``withNewOwnerAndAmount``
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* This is for consistency with ``OwnableState.withNewOwner``
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Miscellaneous
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^^^^^^^^^^^^^
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* ``args[0].parseNetworkHostAndPort()`` becomes ``NetworkHostAndPort.parse(args[0])``
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* There is no longer a ``NodeInfo.advertisedServices`` property
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* The concept of advertised services has been removed from Corda. This is because it was vaguely defined and
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real-world apps would not typically select random, unknown counterparties from the network map based on
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self-declared capabilities
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* We will introduce a replacement for this functionality, business networks, in a future release
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* For now, services should be retrieved by legal name using ``NetworkMapCache.getNodeByLegalName``
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Gotchas
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^^^^^^^
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* Be sure to use the correct identity when issuing cash:
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* The third parameter to ``CashIssueFlow`` should be the *notary* (and not the *node identity*)
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:ref:`From Milestone 13 <changelog_m13>`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Core data structures
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^^^^^^^^^^^^^^^^^^^^
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* ``TransactionBuilder`` changes:
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* Use convenience class ``StateAndContract`` instead of ``TransactionBuilder.withItems`` for passing
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around a state and its contract.
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* Transaction builder DSL changes:
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* When adding inputs and outputs to a transaction builder, you must also specify ``ContractClassName``
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* ``ContractClassName`` is the name of the ``Contract`` subclass used to verify the transaction
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* Contract verify method signature change:
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* ``override fun verify(tx: TransactionForContract)`` becomes ``override fun verify(tx: LedgerTransaction)``
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* You no longer need to override ``ContractState.contract`` function
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Node services (ServiceHub)
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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* ServiceHub API method changes:
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* ``services.networkMapUpdates().justSnapshot`` becomes ``services.networkMapSnapshot()``
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Configuration
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^^^^^^^^^^^^^
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* No longer need to define ``CordaPluginRegistry`` and configure ``requiredSchemas``:
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* Custom contract schemas are automatically detected at startup time by class path scanning
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* For testing purposes, use the ``SchemaService`` method to register new custom schemas (e.g.
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``services.schemaService.registerCustomSchemas(setOf(YoSchemaV1))``)
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Identity
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^^^^^^^^
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* Party names are now ``CordaX500Name``, not ``X500Name``:
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* ``CordaX500Name`` specifies a predefined set of mandatory (organisation, locality, country) and optional fields
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(common name, organisation unit, state) with validation checking
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* Use new builder ``CordaX500Name.build(X500Name(target))`` or explicitly define the X500Name parameters using the
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``CordaX500Name`` constructors
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Testing
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^^^^^^^
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* MockNetwork testing:
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* Mock nodes in node tests are now of type ``StartedNode<MockNode>``, rather than ``MockNode``
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* ``MockNetwork`` now returns a ``BasketOf(<StartedNode<MockNode>>)``
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* You must call internals on ``StartedNode`` to get ``MockNode`` (e.g. ``a = nodes.partyNodes[0].internals``)
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* Host and port changes:
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* Use string helper function ``parseNetworkHostAndPort`` to parse a URL on startup (e.g.
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``val hostAndPort = args[0].parseNetworkHostAndPort()``)
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* Node driver parameter changes:
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* The node driver parameters for starting a node have been reordered
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* The node’s name needs to be given as an ``CordaX500Name``, instead of using ``getX509Name``
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:ref:`From Milestone 12 (First Public Beta) <changelog_m12>`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Core data structures
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^^^^^^^^^^^^^^^^^^^^
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* Transaction building:
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* You no longer need to specify the type of a ``TransactionBuilder`` as ``TransactionType.General``
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* ``TransactionType.General.Builder(notary)`` becomes ``TransactionBuilder(notary)``
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Build
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^^^^^
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* Gradle dependency reference changes:
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* Module names have changed to include ``corda`` in the artifacts' JAR names:
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.. sourcecode:: shell
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compile "net.corda:core:$corda_release_version" -> compile "net.corda:corda-core:$corda_release_version"
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compile "net.corda:finance:$corda_release_version" -> compile "net.corda:corda-finance:$corda_release_version"
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compile "net.corda:jackson:$corda_release_version" -> compile "net.corda:corda-jackson:$corda_release_version"
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compile "net.corda:node:$corda_release_version" -> compile "net.corda:corda-node:$corda_release_version"
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compile "net.corda:rpc:$corda_release_version" -> compile "net.corda:corda-rpc:$corda_release_version"
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Node services (ServiceHub)
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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* ``ServiceHub`` API changes:
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* ``services.networkMapUpdates`` becomes ``services.networkMapFeed``
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* ``services.getCashBalances`` becomes a helper method in the *finance* module contracts package
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(``net.corda.finance.contracts.getCashBalances``)
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Finance
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^^^^^^^
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* Financial asset contracts (``Cash``, ``CommercialPaper``, ``Obligations``) are now a standalone CorDapp within the
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``finance`` module:
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* You need to import them from their respective packages within the ``finance`` module (e.g.
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``net.corda.finance.contracts.asset.Cash``)
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* You need to import the associated asset flows from their respective packages within ``finance`` module. For
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example:
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* ``net.corda.finance.flows.CashIssueFlow``
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* ``net.corda.finance.flows.CashIssueAndPaymentFlow``
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* ``net.corda.finance.flows.CashExitFlow``
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* The ``finance`` gradle project files have been moved into a ``net.corda.finance`` package namespace:
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* Adjust imports of Cash flow references
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* Adjust the ``StartFlow`` permission in ``gradle.build`` files
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* Adjust imports of the associated flows (``Cash*Flow``, ``TwoPartyTradeFlow``, ``TwoPartyDealFlow``) |