NewBlockchainReactor creates a new reactor instance.

NopMetrics returns no-op Metrics.

PrometheusMetrics returns metrics for in and out events, errors, etc.

BlockchainChannel is a channel for blocks and status updates (`BlockStore` height).

MetricsSubsystem is a subsystem shared by all metrics exposed by this package.

BlockchainReactor handles fast sync protocol.

Metrics contains metrics exposed by this package.

Routine is a structure that models a finite state machine as serialized stream of events processed by a handle function.

Event is the type that can be added to the priority queue.

PeerByID is a list of peers sorted by peerID.