google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9: 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@v0.0.0-20241007155032-5fefd90f89a9
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9
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:sha256:685f6001c41ccfd867228968e58fba58c749921c7790f3765bdacb4bad38f502","contract":["code.Code_UNAUTHENTICATED has integer value 16 matching standard canonical RPC status","code.Code_UNAUTHENTICATED string representation equals UNAUTHENTICATED","status.Status constructs with code.Code_UNAUTHENTICATED and serializes to protobuf bytes","status.Status with code.Code_UNAUTHENTICATED deserializes correctly preserving error code and message","status.Status with code.Code_UNAUTHENTICATED packs and unpacks errdetails.ErrorInfo"],"goal":"verify google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9"],"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@v0.0.0-20241007155032-5fefd90f89a9"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9","symbols":["google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.22

require (
	google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9
	google.golang.org/protobuf v1.35.1
)

github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9 h1:QCqS/PdaHTSWGvupk2F/ehwHtGc0/GYkT+3GAcR1CCc=
google.golang.org/genproto/googleapis/rpc v0.0.0-20241007155032-5fefd90f89a9/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=

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 describing authentication failure
	authDetail := &errdetails.ErrorInfo{
		Reason: "TOKEN_EXPIRED",
		Domain: "example.com",
		Metadata: map[string]string{
			"service": "api.example.com",
		},
	}
	anyDetail, err := anypb.New(authDetail)
	if err != nil {
		log.Fatalf("failed to pack error detail: %v", err)
	}

	// Create RPC status with Code_UNAUTHENTICATED
	rpcStatus := &status.Status{
		Code:    int32(code.Code_UNAUTHENTICATED),
		Message: "Authentication credentials were missing or invalid",
		Details: []*anypb.Any{anyDetail},
	}

	// Serialize Status to protobuf bytes
	data, err := proto.Marshal(rpcStatus)
	if err != nil {
		log.Fatalf("failed to marshal status: %v", err)
	}

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

	fmt.Printf("RPC Status Code: %d (%s)\n", decoded.GetCode(), code.Code(decoded.GetCode()).String())
	fmt.Printf("RPC Status Message: %s\n", decoded.GetMessage())
	fmt.Printf("RPC Status Details: %d\n", len(decoded.GetDetails()))
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/genproto/googleapis/rpc/code.Code_UNAUTHENTICATED in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20241007155032-5fefd90f89a9"
  ],
  "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 has integer value 16 matching standard canonical RPC status
	assert(int32(code.Code_UNAUTHENTICATED) == 16, "code.Code_UNAUTHENTICATED must evaluate to 16")
	assert(code.Code(16) == code.Code_UNAUTHENTICATED, "code.Code(16) must map to Code_UNAUTHENTICATED")

	// 2. code.Code_UNAUTHENTICATED string representation equals UNAUTHENTICATED
	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 lookup must return UNAUTHENTICATED")
	assert(code.Code_value["UNAUTHENTICATED"] == 16, "code.Code_value lookup must return 16")

	// 3. status.Status constructs with code.Code_UNAUTHENTICATED and serializes to protobuf bytes
	st := &status.Status{
		Code:    int32(code.Code_UNAUTHENTICATED),
		Message: "Authentication required",
	}
	assert(st.GetCode() == int32(code.Code_UNAUTHENTICATED), "status code should match Code_UNAUTHENTICATED")
	assert(code.Code(st.GetCode()) == code.Code_UNAUTHENTICATED, "status code enum cast should equal Code_UNAUTHENTICATED")

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

	// 4. status.Status with code.Code_UNAUTHENTICATED deserializes correctly preserving error code and message
	var unmarshaled status.Status
	err = proto.Unmarshal(data, &unmarshaled)
	assert(err == nil, "proto.Unmarshal should succeed")
	assert(unmarshaled.GetCode() == int32(code.Code_UNAUTHENTICATED), "unmarshaled status code must match Code_UNAUTHENTICATED")
	assert(code.Code(unmarshaled.GetCode()) == code.Code_UNAUTHENTICATED, "unmarshaled enum must equal Code_UNAUTHENTICATED")
	assert(unmarshaled.GetMessage() == "Authentication required", "unmarshaled status message must match")

	// 5. status.Status with code.Code_UNAUTHENTICATED packs and unpacks errdetails.ErrorInfo
	errorInfo := &errdetails.ErrorInfo{
		Reason: "ACCESS_TOKEN_EXPIRED",
		Domain: "example.com",
		Metadata: map[string]string{
			"auth_scheme": "Bearer",
		},
	}
	anyDetail, err := anypb.New(errorInfo)
	assert(err == nil, "anypb.New(errorInfo) should succeed")

	stWithDetails := &status.Status{
		Code:    int32(code.Code_UNAUTHENTICATED),
		Message: "Token has expired",
		Details: []*anypb.Any{anyDetail},
	}
	assert(len(stWithDetails.GetDetails()) == 1, "details length should be 1")

	detailsData, err := proto.Marshal(stWithDetails)
	assert(err == nil, "proto.Marshal(stWithDetails) should succeed")

	var unmarshaledWithDetails status.Status
	err = proto.Unmarshal(detailsData, &unmarshaledWithDetails)
	assert(err == nil, "proto.Unmarshal should succeed")
	assert(unmarshaledWithDetails.GetCode() == int32(code.Code_UNAUTHENTICATED), "status code must be Code_UNAUTHENTICATED")
	assert(len(unmarshaledWithDetails.GetDetails()) == 1, "unmarshaled details length should be 1")

	unpackedInfo := &errdetails.ErrorInfo{}
	err = anypb.UnmarshalTo(unmarshaledWithDetails.GetDetails()[0], unpackedInfo, proto.UnmarshalOptions{})
	assert(err == nil, "anypb.UnmarshalTo ErrorInfo should succeed")
	assert(unpackedInfo.GetReason() == "ACCESS_TOKEN_EXPIRED", "unpacked reason must match ACCESS_TOKEN_EXPIRED")
	assert(unpackedInfo.GetDomain() == "example.com", "unpacked domain must match example.com")
	assert(unpackedInfo.GetMetadata()["auth_scheme"] == "Bearer", "unpacked metadata must match")

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