func (f ID) Step() int64 {
	return int64(f) & stepMask
}
Step returns an int64 of the snowflake step (or sequence) number
DEPRECATED: the below function will be removed in a future release.
package idService
import (
	"encoding/base64"
	"encoding/binary"
	"errors"
	"fmt"
	"strconv"
	"sync"
	"time"
)
var (
	Epoch int64 = 1288834974657
	NodeBits uint8 = 10
	StepBits uint8 = 12
	mu        sync.Mutex
	nodeMax   int64 = -1 ^ (-1 << NodeBits)
	nodeMask        = nodeMax << StepBits
	stepMask  int64 = -1 ^ (-1 << StepBits)
	timeShift       = NodeBits + StepBits
	nodeShift       = StepBits
)
const encodeBase32Map = "ybndrfg8ejkmcpqxot1uwisza345h769"
var decodeBase32Map [256]byte
const encodeBase58Map = "123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"
var decodeBase58Map [256]byte
type JSONSyntaxError struct{ original []byte }
func (j JSONSyntaxError) Error() string {
	return fmt.Sprintf("invalid snowflake ID %q", string(j.original))
}
var ErrInvalidBase58 = errors.New("invalid base58")
var ErrInvalidBase32 = errors.New("invalid base32")
func init() {
	for i := 0; i < len(encodeBase58Map); i++ {
		decodeBase58Map[i] = 0xFF
	}
	for i := 0; i < len(encodeBase58Map); i++ {
		decodeBase58Map[encodeBase58Map[i]] = byte(i)
	}
	for i := 0; i < len(encodeBase32Map); i++ {
		decodeBase32Map[i] = 0xFF
	}
	for i := 0; i < len(encodeBase32Map); i++ {
		decodeBase32Map[encodeBase32Map[i]] = byte(i)
	}
}
type Node struct {
	mu    sync.Mutex
	epoch time.Time
	time  int64
	node  int64
	step  int64
	nodeMax   int64
	nodeMask  int64
	stepMask  int64
	timeShift uint8
	nodeShift uint8
}
type ID int64
func NewNode(node int64) (*Node, error) {
	mu.Lock()
	nodeMax = -1 ^ (-1 << NodeBits)
	nodeMask = nodeMax << StepBits
	stepMask = -1 ^ (-1 << StepBits)
	timeShift = NodeBits + StepBits
	nodeShift = StepBits
	mu.Unlock()
	n := Node{}
	n.node = node
	n.nodeMax = -1 ^ (-1 << NodeBits)
	n.nodeMask = n.nodeMax << StepBits
	n.stepMask = -1 ^ (-1 << StepBits)
	n.timeShift = NodeBits + StepBits
	n.nodeShift = StepBits
	if n.node < 0 || n.node > n.nodeMax {
		return nil, errors.New("Node number must be between 0 and " + strconv.FormatInt(n.nodeMax, 10))
	}
	var curTime = time.Now()
	n.epoch = curTime.Add(time.Unix(Epoch/1000, (Epoch%1000)*1000000).Sub(curTime))
	return &n, nil
}
func (n *Node) Generate() ID {
	n.mu.Lock()
	now := time.Since(n.epoch).Nanoseconds() / 1000000
	if now == n.time {
		n.step = (n.step + 1) & n.stepMask
		if n.step == 0 {
			for now <= n.time {
				now = time.Since(n.epoch).Nanoseconds() / 1000000
			}
		}
	} else {
		n.step = 0
	}
	n.time = now
	r := ID((now)<<n.timeShift |
		(n.node << n.nodeShift) |
		(n.step),
	)
	n.mu.Unlock()
	return r
}
func (f ID) Int64() int64 {
	return int64(f)
}
func ParseInt64(id int64) ID {
	return ID(id)
}
func (f ID) String() string {
	return strconv.FormatInt(int64(f), 10)
}
func ParseString(id string) (ID, error) {
	i, err := strconv.ParseInt(id, 10, 64)
	return ID(i), err
}
func (f ID) Base2() string {
	return strconv.FormatInt(int64(f), 2)
}
func ParseBase2(id string) (ID, error) {
	i, err := strconv.ParseInt(id, 2, 64)
	return ID(i), err
}
func (f ID) Base32() string {
	if f < 32 {
		return string(encodeBase32Map[f])
	}
	b := make([]byte, 0, 12)
	for f >= 32 {
		b = append(b, encodeBase32Map[f%32])
		f /= 32
	}
	b = append(b, encodeBase32Map[f])
	for x, y := 0, len(b)-1; x < y; x, y = x+1, y-1 {
		b[x], b[y] = b[y], b[x]
	}
	return string(b)
}
func ParseBase32(b []byte) (ID, error) {
	var id int64
	for i := range b {
		if decodeBase32Map[b[i]] == 0xFF {
			return -1, ErrInvalidBase32
		}
		id = id*32 + int64(decodeBase32Map[b[i]])
	}
	return ID(id), nil
}
func (f ID) Base36() string {
	return strconv.FormatInt(int64(f), 36)
}
func ParseBase36(id string) (ID, error) {
	i, err := strconv.ParseInt(id, 36, 64)
	return ID(i), err
}
func (f ID) Base58() string {
	if f < 58 {
		return string(encodeBase58Map[f])
	}
	b := make([]byte, 0, 11)
	for f >= 58 {
		b = append(b, encodeBase58Map[f%58])
		f /= 58
	}
	b = append(b, encodeBase58Map[f])
	for x, y := 0, len(b)-1; x < y; x, y = x+1, y-1 {
		b[x], b[y] = b[y], b[x]
	}
	return string(b)
}
func ParseBase58(b []byte) (ID, error) {
	var id int64
	for i := range b {
		if decodeBase58Map[b[i]] == 0xFF {
			return -1, ErrInvalidBase58
		}
		id = id*58 + int64(decodeBase58Map[b[i]])
	}
	return ID(id), nil
}
func (f ID) Base64() string {
	return base64.StdEncoding.EncodeToString(f.Bytes())
}
func ParseBase64(id string) (ID, error) {
	b, err := base64.StdEncoding.DecodeString(id)
	if err != nil {
		return -1, err
	}
	return ParseBytes(b)
}
func (f ID) Bytes() []byte {
	return []byte(f.String())
}
func ParseBytes(id []byte) (ID, error) {
	i, err := strconv.ParseInt(string(id), 10, 64)
	return ID(i), err
}
func (f ID) IntBytes() [8]byte {
	var b [8]byte
	binary.BigEndian.PutUint64(b[:], uint64(f))
	return b
}
func ParseIntBytes(id [8]byte) ID {
	return ID(int64(binary.BigEndian.Uint64(id[:])))
}
func (f ID) Time() int64 {
	return (int64(f) >> timeShift) + Epoch
}
func (f ID) Node() int64 {
	return int64(f) & nodeMask >> nodeShift
}