google.golang.org/genproto/googleapis/rpc v0.0.0-20260904194346-d0f1323225a4: code.Code_UNAUTHENTICATED

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4
Demonstrate these symbols/APIs:
  - google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:6b0fc64033faaf4195b2582fc1c1708d165a9e5969204335fa8c3714bba447d6","contract":["code.Code_UNAUTHENTICATED represents authentication failure with enum value 16","code.Code_UNAUTHENTICATED enum converts to string representation UNAUTHENTICATED and maps in Code_name and Code_value","status.Status represents an RPC error status with code.Code_UNAUTHENTICATED and unmarshals successfully","status.Status with code.Code_UNAUTHENTICATED encapsulates error details describing authentication failure"],"goal":"verify google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4"],"schemaVersion":1,"symbols":["google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4","symbols":["google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require (
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260904194346-d0f1323225a4
	google.golang.org/protobuf v1.36.12
)

github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260904194346-d0f1323225a4 h1:5t+ZydAFj5kGVLrgCvLmpmCf9ylGRd64hpEronfRaws=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260904194346-d0f1323225a4/go.mod h1:DjtHYE8FKJLivXcBEjGwndXfIC23G0VpXiXKqG179uA=
google.golang.org/protobuf v1.36.12 h1:pJOKDDOyeXErUroCihFAd5LQuwXBSpVnKGrj5o/fwxc=
google.golang.org/protobuf v1.36.12/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"
	"log"

	"google.golang.org/genproto/googleapis/rpc/code"
	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/genproto/googleapis/rpc/status"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/anypb"
)

func main() {
	// Create an ErrorInfo detail representing an authentication failure
	errorInfo := &errdetails.ErrorInfo{
		Reason: "AUTH_TOKEN_EXPIRED",
		Domain: "auth.example.com",
		Metadata: map[string]string{
			"auth_type": "bearer",
			"realm":     "api.example.com",
		},
	}
	anyErrorInfo, err := anypb.New(errorInfo)
	if err != nil {
		log.Fatalf("failed to pack error info: %v", err)
	}

	// Create RPC status with Code_UNAUTHENTICATED
	st := &status.Status{
		Code:    int32(code.Code_UNAUTHENTICATED),
		Message: "authentication credential is invalid or expired",
		Details: []*anypb.Any{anyErrorInfo},
	}

	data, err := proto.Marshal(st)
	if err != nil {
		log.Fatalf("failed to marshal status: %v", err)
	}

	var decoded status.Status
	if err := proto.Unmarshal(data, &decoded); err != nil {
		log.Fatalf("failed to unmarshal status: %v", err)
	}

	fmt.Printf("Status Code: %d (%s)\n", decoded.GetCode(), code.Code_name[decoded.GetCode()])
	fmt.Printf("Status Message: %s\n", decoded.GetMessage())
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20260904194346-d0f1323225a4"
  ],
  "symbols": [
    "google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED"
  ]
}

package main

import (
	"fmt"
	"os"

	"google.golang.org/genproto/googleapis/rpc/code"
	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/genproto/googleapis/rpc/status"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/anypb"
)

func assert(condition bool, message string) {
	if !condition {
		fmt.Fprintf(os.Stderr, "Assertion failed: %s\n", message)
		os.Exit(1)
	}
}

func main() {
	// 1. code.Code_UNAUTHENTICATED represents authentication failure with enum value 16
	assert(code.Code_UNAUTHENTICATED == 16, "code.Code_UNAUTHENTICATED must have value 16")
	assert(int32(code.Code_UNAUTHENTICATED) == 16, "int32(code.Code_UNAUTHENTICATED) must be 16")

	// 2. code.Code_UNAUTHENTICATED enum converts to string representation UNAUTHENTICATED and maps in Code_name and Code_value
	assert(code.Code_UNAUTHENTICATED.String() == "UNAUTHENTICATED", "code.Code_UNAUTHENTICATED.String() must be UNAUTHENTICATED")
	assert(code.Code_name[int32(code.Code_UNAUTHENTICATED)] == "UNAUTHENTICATED", "code.Code_name[16] must be UNAUTHENTICATED")
	assert(code.Code_value["UNAUTHENTICATED"] == int32(code.Code_UNAUTHENTICATED), "code.Code_value[UNAUTHENTICATED] must match Code_UNAUTHENTICATED")

	// 3. status.Status represents an RPC error status with code.Code_UNAUTHENTICATED and unmarshals successfully
	st := &status.Status{
		Code:    int32(code.Code_UNAUTHENTICATED),
		Message: "missing or invalid authentication token",
	}
	assert(st.GetCode() == int32(code.Code_UNAUTHENTICATED), "status code must match Code_UNAUTHENTICATED")
	assert(st.GetMessage() == "missing or invalid authentication token", "status message must match")

	data, err := proto.Marshal(st)
	assert(err == nil, "proto.Marshal(st) must succeed")
	assert(len(data) > 0, "marshaled payload must not be empty")

	var decoded status.Status
	err = proto.Unmarshal(data, &decoded)
	assert(err == nil, "proto.Unmarshal(data) must succeed")
	assert(decoded.GetCode() == int32(code.Code_UNAUTHENTICATED), "decoded status code must match Code_UNAUTHENTICATED")
	assert(decoded.GetMessage() == "missing or invalid authentication token", "decoded message must match")

	// 4. status.Status with code.Code_UNAUTHENTICATED encapsulates error details describing authentication failure
	errorInfo := &errdetails.ErrorInfo{
		Reason: "TOKEN_EXPIRED",
		Domain: "auth.example.com",
		Metadata: map[string]string{
			"auth_type": "bearer",
			"status":    "expired",
		},
	}
	anyDetail, err := anypb.New(errorInfo)
	assert(err == nil, "anypb.New(errorInfo) must succeed")

	st.Details = []*anypb.Any{anyDetail}
	assert(len(st.GetDetails()) == 1, "details count must be 1")

	unpackedInfo := &errdetails.ErrorInfo{}
	err = anypb.UnmarshalTo(st.GetDetails()[0], unpackedInfo, proto.UnmarshalOptions{})
	assert(err == nil, "anypb.UnmarshalTo must succeed")
	assert(unpackedInfo.GetReason() == "TOKEN_EXPIRED", "unpacked reason must match")
	assert(unpackedInfo.GetDomain() == "auth.example.com", "unpacked domain must match")
	assert(unpackedInfo.GetMetadata()["auth_type"] == "bearer", "metadata auth_type must match")
	assert(unpackedInfo.GetMetadata()["status"] == "expired", "metadata status must match")

	fmt.Println("All contract assertions for Code_UNAUTHENTICATED passed successfully.")
}