HasConsistentTransport returns true if the address 'a' shares a protocol set with any address in the green set.

NewIDService constructs a new *IDService and activates it by attaching its stream handler to the given host.Host.

ID is the protocol.ID of the Identify Service.

LibP2PVersion holds the current protocol version for a client running this code TODO(jbenet): fix the versioning mess.

IDService is a structure that implements ProtocolIdentify.

ObservedAddr is an entry for an address reported by our peers.

ObservedAddrSet keeps track of a set of ObservedAddrs the zero-value is ready to be used.