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29 lines
1.5 KiB
ReStructuredText
29 lines
1.5 KiB
ReStructuredText
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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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* ``ServiceHub.vaultService``
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* Stores the node’s current and historic states
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* ``ServiceHub.storageService``
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* Stores additional information such as transactions and attachments
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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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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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* ``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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Finally, ``ServiceHub`` exposes the node's legal identity key (via ``ServiceHub.legalIdentityKey``) and its notary
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identity key (via ``ServiceHub.notaryIdentityKey``).
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