util

type Clock interface {
	Now() time.Time
	Since(time.Time) time.Duration
}

type FixedClock struct {
	NowTime time.Time
}

type LogicalError error

type SystemClock struct{}

type ThroughputReader struct {
	LogName        string
	R              io.Reader
	StartedAt      time.Time
	LastProgressAt time.Time
	ProcessedBytes int
	Context        context.Context
}

type ThroughputWriter struct {
	LogName        string
	W              io.Writer
	StartedAt      time.Time
	LastProgressAt time.Time
	ProcessedBytes int
	Context        context.Context
}