Add a method to encode the snowflake as a byte slice

snowflake.go

@@ -3,6 +3,7 @@ package snowflake
 
 import (
 	"encoding/base64"
+	"encoding/binary"
 	"errors"
 	"strconv"
 	"sync"
@@ -105,11 +106,19 @@ func (f ID) Base64() string {
 	return base64.StdEncoding.EncodeToString(f.Bytes())
 }
 
-// Bytes returns a byte array of the snowflake ID
+// Bytes returns a byte slice of the snowflake ID
 func (f ID) Bytes() []byte {
 	return []byte(f.String())
 }
 
+// IntBytes returns an array of bytes of the snowflake ID, encoded as a
+// big endian integer.
+func (f ID) IntBytes() [8]byte {
+	var b [8]byte
+	binary.BigEndian.PutUint64(b[:], uint64(f))
+	return b
+}
+
 // Time returns an int64 unix timestamp of the snowflake ID time
 func (f ID) Time() int64 {
 	return (int64(f) >> 22) + Epoch

snowflake_test.go

@@ -1,6 +1,9 @@
 package snowflake
 
-import "testing"
+import (
+	"bytes"
+	"testing"
+)
 
 func TestMarshalJSON(t *testing.T) {
 	id := ID(13587)
@@ -16,6 +19,14 @@ func TestMarshalJSON(t *testing.T) {
 	}
 }
 
+func TestMarshalsIntBytes(t *testing.T) {
+	id := ID(13587).IntBytes()
+	expected := []byte{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x35, 0x13}
+	if !bytes.Equal(id[:], expected) {
+		t.Errorf("Expected ID to be encoded as %v, got %v", expected, id)
+	}
+}
+
 func TestUnmarshalJSON(t *testing.T) {
 	strID := "\"13587\""
 	expected := ID(13587)