stats

type HandlerStats interface {
	// BlockRequestHandler stats
	IncBlockRequest()
	IncMissingBlockHash()
	UpdateBlocksReturned(num uint16)
	UpdateBlockRequestProcessingTime(duration time.Duration)

	// CodeRequestHandler stats
	IncCodeRequest()
	IncMissingCodeHash()
	UpdateCodeReadTime(duration time.Duration)
	UpdateCodeBytesReturned(bytes uint32)

	// LeafsRequestHandler stats
	IncLeafsRequest()
	UpdateLeafsReturned(numLeafs uint16)
	UpdateLeafsRequestProcessingTime(duration time.Duration)
	IncMissingRoot()
}