Package org.hyperledger.fabric.client

package org.hyperledger.fabric.client

This package provides the set of interfaces that enable a Java application to interact with a Fabric blockchain network. It provides a simple API to submit transactions to a ledger or query the contents of a ledger with minimal code. The Gateway SDK implements the Fabric programming model as described in the Running a Fabric Application tutorial of the Fabric documentation.

The entry point into this package is Gateway.

See Also:

• Running a Fabric Application

Related Packages

Package	Description
org.hyperledger.fabric.client.identity	Provides classes and interfaces for describing client identity and for creating digital signatures on behalf of client identities.

Class	Description
BlockAndPrivateDataEventsRequest	A Fabric Gateway call to obtain block and private data events.
BlockAndPrivateDataEventsRequest.Builder	Builder used to create a new block and private data events request.
BlockEventsRequest	A Fabric Gateway call to obtain block events.
BlockEventsRequest.Builder	Builder used to create a new block events request.
Builder<T>	A builder used to create new object instances from configuration state.
CallOption	Deprecated. Use gRPC CallOptions instead.
ChaincodeEvent	Chaincode event emitted by a transaction function.
ChaincodeEventsRequest	A Fabric Gateway call to obtain chaincode events.
ChaincodeEventsRequest.Builder	Builder used to create a new chaincode events request.
Checkpoint	Checkpoint provides the current position for event processing.
Checkpointer	Checkpointer allows update of a checkpoint position after events are successfully processed.
CloseableIterator<T>	An iterator that can be closed when the consumer does not want to read any more elements, freeing up resources that may be held by the iterator.
Commit	Allows access to information about a transaction that is committed to the ledger.
CommitException	Thrown when a transaction fails to commit successfully.
CommitStatusException	Thrown when a failure occurs obtaining the commit status of a transaction.
Contract	Represents a smart contract instance in a network.
EndorseException	Thrown when a failure occurs endorsing a transaction proposal.
EventsBuilder<T>	Builder used to create a new events request.
EventsRequest<T>	A Fabric Gateway call to obtain events.
FileCheckpointer	Checkpointer implementation backed by persistent file storage.
FilteredBlockEventsRequest	A Fabric Gateway call to obtain filtered block events.
FilteredBlockEventsRequest.Builder	Builder used to create a new filtered block events request.
Gateway	The Gateway provides the connection point for an application to access the Fabric network as a specific user.
Gateway.Builder	The builder is used to specify the options used when connecting a Gateway.
GatewayException	Thrown if an error is encountered while invoking gRPC services on a gateway peer.
GatewayRuntimeException	Thrown if an error is encountered while invoking gRPC services on a gateway peer.
Hash	Hash function implementations used to generate a digest of a supplied message.
InMemoryCheckpointer	A non-persistent Checkpointer implementation.
Network	Network represents a network of nodes that are members of a specific Fabric channel.
Proposal	A Fabric Gateway transaction proposal, which can be used to evaluate a transaction to query ledger state, or obtain endorsements so that the transaction can be submitted to update ledger state.
Proposal.Builder	Builder used to create a new transaction proposal.
Signable	A Fabric Gateway call that can be explicitly signed.
Status	Information about a transaction that is committed to the ledger.
SubmitException	Thrown when a failure occurs submitting an endorsed transaction to the orderer.
SubmittedTransaction	Allows access to the transaction result and its commit status on the ledger.
Transaction	An endorsed transaction that can be submitted to the orderer for commit to the ledger.
TransactionException	Thrown when a failure occurs invoking a transaction.