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

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 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

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:sha256:364f046b6d9637a0aebcf2500150496ed39111bbb5a282ab582c2f38c48f38df","contract":["errdetails.ErrorInfo stores reason, domain, and metadata key-value pairs accessible via GetReason, GetDomain, and GetMetadata.","errdetails.ErrorInfo returns safe empty defaults when nil or uninitialized, with nil GetMetadata.","errdetails.ErrorInfo serializes and deserializes accurately using proto.Marshal and proto.Unmarshal preserving reason, domain, and metadata entries.","errdetails.ErrorInfo.Reset clears reason, domain, and metadata from the message.","errdetails.ErrorInfo packs into anypb.Any for inclusion in status.Status details and unpacks cleanly with anypb.UnmarshalTo."],"goal":"verify 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},"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","verifierAdapter":"golang@1"}

module example.com/sample

go 1.25.0

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() {
	info := &errdetails.ErrorInfo{
		Reason: "RESOURCE_QUOTA_EXCEEDED",
		Domain: "example.com",
		Metadata: map[string]string{
			"quota_limit": "1000",
			"quota_used":  "1001",
		},
	}

	fmt.Printf("Error Reason: %s\n", info.GetReason())
	fmt.Printf("Error Domain: %s\n", info.GetDomain())
	for k, v := range info.GetMetadata() {
		fmt.Printf("Metadata [%s]: %s\n", k, v)
	}

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

	var decoded errdetails.ErrorInfo
	if err := proto.Unmarshal(data, &decoded); err != nil {
		log.Fatalf("failed to unmarshal ErrorInfo: %v", err)
	}
	fmt.Printf("Decoded Reason: %s\n", decoded.GetReason())

	anyInfo, err := anypb.New(info)
	if err != nil {
		log.Fatalf("failed to pack ErrorInfo into Any: %v", err)
	}

	rpcStatus := &status.Status{
		Code:    int32(code.Code_RESOURCE_EXHAUSTED),
		Message: "rate limit exceeded for project",
		Details: []*anypb.Any{anyInfo},
	}
	fmt.Printf("Status: code=%d message=%s details=%d\n", rpcStatus.GetCode(), rpcStatus.GetMessage(), len(rpcStatus.GetDetails()))
}

{
  "schemaVersion": 1,
  "goal": "verify 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"
  ]
}

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

func main() {
	// 1. errdetails.ErrorInfo stores reason, domain, and metadata key-value pairs accessible via GetReason, GetDomain, and GetMetadata.
	info := &errdetails.ErrorInfo{
		Reason: "RESOURCE_QUOTA_EXCEEDED",
		Domain: "example.com",
		Metadata: map[string]string{
			"quota_limit": "500",
			"quota_used":  "505",
		},
	}
	assert(info.GetReason() == "RESOURCE_QUOTA_EXCEEDED", "reason mismatch")
	assert(info.GetDomain() == "example.com", "domain mismatch")
	assert(info.GetMetadata()["quota_limit"] == "500", "metadata quota_limit mismatch")
	assert(info.GetMetadata()["quota_used"] == "505", "metadata quota_used mismatch")

	// 2. errdetails.ErrorInfo returns safe empty defaults when nil or uninitialized, with nil GetMetadata.
	var nilInfo *errdetails.ErrorInfo
	assert(nilInfo.GetReason() == "", "nil ErrorInfo GetReason must be empty")
	assert(nilInfo.GetDomain() == "", "nil ErrorInfo GetDomain must be empty")
	assert(nilInfo.GetMetadata() == nil, "nil ErrorInfo GetMetadata must be nil")

	emptyInfo := &errdetails.ErrorInfo{}
	assert(emptyInfo.GetReason() == "", "empty ErrorInfo GetReason must be empty")
	assert(emptyInfo.GetDomain() == "", "empty ErrorInfo GetDomain must be empty")
	assert(emptyInfo.GetMetadata() == nil, "empty ErrorInfo GetMetadata must be nil")

	// 3. errdetails.ErrorInfo serializes and deserializes accurately using proto.Marshal and proto.Unmarshal preserving reason, domain, and metadata entries.
	data, err := proto.Marshal(info)
	assert(err == nil, "proto.Marshal failed")
	assert(len(data) > 0, "marshaled bytes empty")

	var unmarshaled errdetails.ErrorInfo
	err = proto.Unmarshal(data, &unmarshaled)
	assert(err == nil, "proto.Unmarshal failed")
	assert(unmarshaled.GetReason() == "RESOURCE_QUOTA_EXCEEDED", "unmarshaled reason mismatch")
	assert(unmarshaled.GetDomain() == "example.com", "unmarshaled domain mismatch")
	assert(unmarshaled.GetMetadata()["quota_limit"] == "500", "unmarshaled metadata mismatch")
	assert(unmarshaled.GetMetadata()["quota_used"] == "505", "unmarshaled metadata mismatch")

	// 4. errdetails.ErrorInfo.Reset clears reason, domain, and metadata from the message.
	infoToReset := &errdetails.ErrorInfo{
		Reason: "TEMP_ERROR",
		Domain: "example.com",
		Metadata: map[string]string{
			"key": "value",
		},
	}
	infoToReset.Reset()
	assert(infoToReset.GetReason() == "", "reset reason must be empty")
	assert(infoToReset.GetDomain() == "", "reset domain must be empty")
	assert(infoToReset.GetMetadata() == nil, "reset metadata must be nil")

	// 5. errdetails.ErrorInfo packs into anypb.Any for inclusion in status.Status details and unpacks cleanly with anypb.UnmarshalTo.
	anyInfo, err := anypb.New(info)
	assert(err == nil, "anypb.New failed")

	st := &status.Status{
		Code:    int32(code.Code_RESOURCE_EXHAUSTED),
		Message: "quota limit reached",
		Details: []*anypb.Any{anyInfo},
	}
	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 failed")
	assert(unpackedInfo.GetReason() == "RESOURCE_QUOTA_EXCEEDED", "unpacked reason mismatch")
	assert(unpackedInfo.GetDomain() == "example.com", "unpacked domain mismatch")
	assert(unpackedInfo.GetMetadata()["quota_limit"] == "500", "unpacked metadata quota_limit mismatch")

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