add comments, code refactor, fix typo

pkg/utils/datetimes.go

@@ -2,24 +2,31 @@ package utils
 
 import "time"
 
-const LongDateTimeFormat = "2006-01-02 15:04:05"
+const (
+	longDateTimeFormat = "2006-01-02 15:04:05"
+)
 
+// FormatToLongDateTime returns a textual representation of the time value formatted by long date time format
 func FormatToLongDateTime(t time.Time) string {
-	return t.Format(LongDateTimeFormat)
+	return t.Format(longDateTimeFormat)
 }
 
+// ParseFromLongDateTime parses a formatted string in long date time format
 func ParseFromLongDateTime(t string) (time.Time, error) {
-	return time.Parse(LongDateTimeFormat, t)
+	return time.Parse(longDateTimeFormat, t)
 }
 
+// GetMinTransactionTimeFromUnixTime returns the minimum transaction time from unix time
 func GetMinTransactionTimeFromUnixTime(unixTime int64) int64 {
 	return unixTime * 1000
 }
 
+// GetMaxTransactionTimeFromUnixTime returns the maximum transaction time from unix time
 func GetMaxTransactionTimeFromUnixTime(unixTime int64) int64 {
 	return unixTime*1000 + 999
 }
 
+// GetUnixTimeFromTransactionTime returns unix time from the transaction time
 func GetUnixTimeFromTransactionTime(transactionTime int64) int64 {
 	return transactionTime / 1000
 }