Add: NTP utils

Signed-off-by: Prajjawalk <prajjawalkhandelwal@gmail.com>

go.mod

@@ -40,6 +40,7 @@ require (
 require (
 	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
 	github.com/VictoriaMetrics/fastcache v1.6.0 // indirect
+	github.com/beevik/ntp v0.3.0
 	github.com/benbjohnson/clock v1.3.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/btcsuite/btcd v0.20.1-beta // indirect

go.sum

@@ -197,6 +197,8 @@ github.com/aws/aws-sdk-go-v2/service/sts v1.7.2/go.mod h1:8EzeIqfWt2wWT4rJVu3f21
 github.com/aws/smithy-go v1.1.0/go.mod h1:EzMw8dbp/YJL4A5/sbhGddag+NPT7q084agLbB9LgIw=
 github.com/aws/smithy-go v1.7.0/go.mod h1:SObp3lf9smib00L/v3U2eAKG8FyQ7iLrJnQiAmR5n+E=
 github.com/aws/smithy-go v1.8.0/go.mod h1:SObp3lf9smib00L/v3U2eAKG8FyQ7iLrJnQiAmR5n+E=
+github.com/beevik/ntp v0.3.0 h1:xzVrPrE4ziasFXgBVBZJDP0Wg/KpMwk2KHJ4Ba8GrDw=
+github.com/beevik/ntp v0.3.0/go.mod h1:hIHWr+l3+/clUnF44zdK+CWW7fO8dR5cIylAQ76NRpg=
 github.com/benbjohnson/clock v1.0.3/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=

utils/ntp.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"time"
+
+	"github.com/beevik/ntp"
+)
+
+var NTPServer = "pool.ntp.org"
+
+func GetNTPTime() (time.Time, error) {
+	t, err := ntp.Time(NTPServer)
+	if err != nil {
+		return t, err
+	}
+
+	return t, nil
+}
+
+func GetNTPMetadata() (*ntp.Response, error) {
+	options := ntp.QueryOptions{Timeout: 60 * time.Second, TTL: 10}
+	response, err := ntp.QueryWithOptions(NTPServer, options)
+	if err != nil {
+		return nil, err
+	}
+
+	return response, nil
+}
+
+func GetTimeOffset() (time.Duration, error) {
+	options := ntp.QueryOptions{Timeout: 60 * time.Second, TTL: 10}
+	response, err := ntp.QueryWithOptions(NTPServer, options)
+	if err != nil {
+		return 0, err
+	}
+
+	return response.ClockOffset, nil
+}