# Functions
NewBlockCache returns a new BlockCache struct.
NewManager creates new block Manager.
NopMetrics returns no-op Metrics.
PrometheusMetrics returns Metrics build using Prometheus client library.
# Constants
MetricsSubsystem is a subsystem shared by all metrics exposed by this package.
# Structs
BlockCache maintains blocks that are seen and hard confirmed.
Metrics contains metrics exposed by this package.
Manager is responsible for aggregating transactions into blocks.