2017-06-07 15:14:01 +00:00
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API: ServiceHub
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===============
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Within ``FlowLogic.call``, the flow developer has access to the node's ``ServiceHub``, which provides access to the
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various services the node provides. The services offered by the ``ServiceHub`` are split into the following categories:
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* ``ServiceHub.networkMapCache``
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* Provides information on other nodes on the network (e.g. notaries…)
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* ``ServiceHub.identityService``
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* Allows you to resolve anonymous identities to well-known identities if you have the required certificates
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2017-06-29 10:13:40 +00:00
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* ``ServiceHub.attachments``
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* Gives you access to the node's attachments
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* ``ServiceHub.validatedTransactions``
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* Gives you access to the transactions stored in the node
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2017-06-07 15:14:01 +00:00
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* ``ServiceHub.vaultService``
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* Stores the node’s current and historic states
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* ``ServiceHub.keyManagementService``
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* Manages signing transactions and generating fresh public keys
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* ``ServiceHub.myInfo``
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* Other information about the node
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* ``ServiceHub.clock``
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* Provides access to the node’s internal time and date
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2020-01-09 11:18:32 +00:00
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* ``ServiceHub.diagnosticsService``
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* Provides diagnostic information about the node, including the node version and currently running apps. Note that this data should be
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used for diagnostic purposes ONLY
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* ``ServiceHub.contractUpgradeService``
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* Provides functionality for secure contract upgrades
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2017-06-07 15:14:01 +00:00
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Additional, ``ServiceHub`` exposes the following properties:
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* ``ServiceHub.loadState`` and ``ServiceHub.toStateAndRef`` to resolve a ``StateRef`` into a ``TransactionState`` or
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a ``StateAndRef``
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2017-10-01 22:33:15 +00:00
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* ``ServiceHub.signInitialTransaction`` to sign a ``TransactionBuilder`` and convert it into a ``SignedTransaction``
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* ``ServiceHub.createSignature`` and ``ServiceHub.addSignature`` to create and add signatures to a ``SignedTransaction``
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