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 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 syntax = "proto3";
 
 package google.protobuf;
 
 option cc_enable_arenas = true;
 option go_package = "google.golang.org/protobuf/types/known/timestamppb";
 option java_package = "com.google.protobuf";
 option java_outer_classname = "TimestampProto";
 option java_multiple_files = true;
 option objc_class_prefix = "GPB";
 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
 
 // A Timestamp represents a point in time independent of any time zone or local
 // calendar, encoded as a count of seconds and fractions of seconds at
 // nanosecond resolution. The count is relative to an epoch at UTC midnight on
 // January 1, 1970, in the proleptic Gregorian calendar which extends the
 // Gregorian calendar backwards to year one.
 //
 // All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
 // second table is needed for interpretation, using a [24-hour linear
 // smear](https://developers.google.com/time/smear).
 //
 // The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
 // restricting to that range, we ensure that we can convert to and from [RFC
 // 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
 //
 // # Examples
 //
 // Example 1: Compute Timestamp from POSIX `time()`.
 //
 //     Timestamp timestamp;
 //     timestamp.set_seconds(time(NULL));
 //     timestamp.set_nanos(0);
 //
 // Example 2: Compute Timestamp from POSIX `gettimeofday()`.
 //
 //     struct timeval tv;
 //     gettimeofday(&tv, NULL);
 //
 //     Timestamp timestamp;
 //     timestamp.set_seconds(tv.tv_sec);
 //     timestamp.set_nanos(tv.tv_usec * 1000);
 //
 // Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
 //
 //     FILETIME ft;
 //     GetSystemTimeAsFileTime(&ft);
 //     UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
 //
 //     // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
 //     // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
 //     Timestamp timestamp;
 //     timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
 //     timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
 //
 // Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
 //
 //     long millis = System.currentTimeMillis();
 //
 //     Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
 //         .setNanos((int) ((millis % 1000) * 1000000)).build();
 //
 // Example 5: Compute Timestamp from Java `Instant.now()`.
 //
 //     Instant now = Instant.now();
 //
 //     Timestamp timestamp =
 //         Timestamp.newBuilder().setSeconds(now.getEpochSecond())
 //             .setNanos(now.getNano()).build();
 //
 // Example 6: Compute Timestamp from current time in Python.
 //
 //     timestamp = Timestamp()
 //     timestamp.GetCurrentTime()
 //
 // # JSON Mapping
 //
 // In JSON format, the Timestamp type is encoded as a string in the
 // [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
 // format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
 // where {year} is always expressed using four digits while {month}, {day},
 // {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
 // seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
 // are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
 // is required. A proto3 JSON serializer should always use UTC (as indicated by
 // "Z") when printing the Timestamp type and a proto3 JSON parser should be
 // able to accept both UTC and other timezones (as indicated by an offset).
 //
 // For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
 // 01:30 UTC on January 15, 2017.
 //
 // In JavaScript, one can convert a Date object to this format using the
 // standard
 // [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
 // method. In Python, a standard `datetime.datetime` object can be converted
 // to this format using
 // [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
 // the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
 // the Joda Time's [`ISODateTimeFormat.dateTime()`](
 // http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime()
 // ) to obtain a formatter capable of generating timestamps in this format.
 //
 message Timestamp {
   // Represents seconds of UTC time since Unix epoch
   // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
   // 9999-12-31T23:59:59Z inclusive.
   int64 seconds = 1;
 
   // Non-negative fractions of a second at nanosecond resolution. Negative
   // second values with fractions must still have non-negative nanos values
   // that count forward in time. Must be from 0 to 999,999,999
   // inclusive.
   int32 nanos = 2;
 }

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