CodeSampleX

Sample

Convert between Go time.Time and Protocol Buffers Timestamp using timestamppb New, AsTime, IsValid, and CheckValid with zero and range validation

sha256:9f4e978498bd666624a103863d3c7a58a7a39f9095661f61dece4c3eb4e3d6af

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment linux 24 · ubuntu · glibc 2.39 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…		 2026-08-27

Case

HOW
Goal
Convert between Go time.Time and Protocol Buffers Timestamp using timestamppb New, AsTime, IsValid, and CheckValid with zero and range validation
Packages
Symbols
  • google.golang.org/protobuf/types/known/timestamppb.New
  • google.golang.org/protobuf/types/known/timestamppb.Timestamp.AsTime
  • google.golang.org/protobuf/types/known/timestamppb.Timestamp.CheckValid
  • google.golang.org/protobuf/types/known/timestamppb.Timestamp.IsValid
Created
2026-08-27T20:58:39Z

Contract

  1. timestamppb.New converts time.Time into *timestamppb.Timestamp with Seconds and Nanos normalized to UTC, correctly mapping zero time and sub-second nanoseconds.
  2. timestamppb.Timestamp.AsTime converts the protobuf message back to time.Time in UTC, and calling AsTime on a nil receiver safely returns time.Unix(0, 0).UTC().
  3. timestamppb.Timestamp.CheckValid and IsValid validate timestamp bounds from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z and reject negative or overflowing nanoseconds.
  4. timestamppb.Timestamp supports protobuf wire serialization and protojson serialization formatting as an RFC 3339 string.

Files

  • NOTES.md
  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • timestamp_test.go

Download the source artifact (tar.gz)

Origin Seeder

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