net.corda.node.services.transactions

## Package net.corda.node.services.transactions

### Types

DistributedImmutableMap | `class DistributedImmutableMap<K : Any, V : Any>` A distributed map state machine that doesnt allow overriding values. The state machine is replicated across a Copycat Raft cluster.
InMemoryUniquenessProvider | `class InMemoryUniquenessProvider : UniquenessProvider` A dummy Uniqueness provider that stores the whole history of consumed states in memory
NotaryService | `abstract class NotaryService : SingletonSerializeAsToken` A Notary service acts as the final signer of a transaction ensuring two things:
PersistentUniquenessProvider | `class PersistentUniquenessProvider : UniquenessProvider, SingletonSerializeAsToken` A RDBMS backed Uniqueness provider
RaftUniquenessProvider | `class RaftUniquenessProvider : UniquenessProvider, SingletonSerializeAsToken` A uniqueness provider that records committed input states in a distributed collection replicated and persisted in a Raft cluster, using the Copycat framework (http://atomix.io/copycat/).
RaftValidatingNotaryService | `class RaftValidatingNotaryService : NotaryService` A validating notary service operated by a group of mutually trusting parties, uses the Raft algorithm to achieve consensus.
SimpleNotaryService | `class SimpleNotaryService : NotaryService` A simple Notary service that does not perform transaction validation
ValidatingNotaryService | `class ValidatingNotaryService : NotaryService` A Notary service that validates the transaction chain of he submitted transaction before committing it