Package org.hyperledger.fabric.gateway

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 Developing Applications chapter of the Fabric documentation.

See Also:

Developing Fabric Applications

Interface Summary

Interface	Description
Contract	Represents a smart contract instance in a network.
ContractEvent	Event emitted by the business logic of a smart contract during execution of a transaction.
Gateway	The Gateway provides the connection point for an application to access the Fabric network as a specific user.
Gateway.Builder	The Gateway Builder interface defines the options that can be configured prior to connection.
Network	A Network object represents the set of peers in a Fabric network (channel).
Transaction	A Transaction represents a specific invocation of a transaction function, and provides flexibility over how that transaction is invoked.
Wallet	Wallet defines the interface for storing and managing users' identities in a Fabric network.
Wallet.Identity	Represents a user's identity that is required to connect to a Fabric network.

Class Summary

Class	Description
DefaultCheckpointers	Provides static factory methods used to create instances of default Checkpointer implementations.

Enum Summary

Enum	Description
DefaultCommitHandlers	Default commit handler implementations.
DefaultQueryHandlers	Default query handler implementations.

Exception Summary

Exception	Description
ContractException	Thrown when an error occurs invoking a smart contract.
GatewayException	Base class for exceptions thrown by the Gateway SDK or by components of the underlying Fabric.
GatewayRuntimeException	Runtime exception for gateway classes.