Draft Specification for V2

• Make bit assignment customizable

  • BitsTime = 63 - BitsSequence - BitsMachineID
  • BitsSequence > 0
  • BitsMachineID > 0
  • BitsSequence + BitsMachineID < 32

• Make the time unit customizable

type Settings struct {
	BitsSequence   int
	BitsMachineID  int
	TimeUnit       time.Duration
	StartTime      time.Time
	MachineID      func() (int, error)
	CheckMachineID func(int) bool
}

• Remove NewSonyflake
  • Use New instead

func New(st Settings) (*Sonyflake, error)
func NewSonyflake(st Settings) *Sonyflake

• NextID returns int64 instead of uint64

func (sf *Sonyflake) NextID() (int64, error)