google.golang.org/grpc v1.72.1: Version, NewServer, codes.Code

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/grpc@v1.72.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/grpc@v1.72.1

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:sha256:8f95c7e3fcf63efc1c17cec502a2323193366fda15601a4fc57c4098f3eedb23","contract":["grpc.Version exposes the package version string matching 1.72.1","grpc.NewServer initializes a functional gRPC server instance that can be stopped","codes.Code formats canonical gRPC status codes to string representations","status.New constructs a Status value carrying the specified code and message","status.Code extracts canonical code from status error, OK from nil, and Unknown from generic error","metadata.Pairs creates structured multi-value metadata accessible via Get"],"goal":"verify pkg:golang/google.golang.org/grpc@v1.72.1","kind":"HOW","packages":["pkg:golang/google.golang.org/grpc@v1.72.1"],"schemaVersion":1,"symbols":["google.golang.org/grpc.Version","google.golang.org/grpc.NewServer","google.golang.org/grpc/codes.Code","google.golang.org/grpc/status.New","google.golang.org/grpc/status.Code","google.golang.org/grpc/metadata.Pairs"]},"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/grpc@v1.72.1"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/grpc@v1.72.1","symbols":["google.golang.org/grpc.Version","google.golang.org/grpc.NewServer","google.golang.org/grpc/codes.Code","google.golang.org/grpc/status.New","google.golang.org/grpc/status.Code","google.golang.org/grpc/metadata.Pairs"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.23

require google.golang.org/grpc v1.72.1

require (
	golang.org/x/net v0.35.0 // indirect
	golang.org/x/sys v0.30.0 // indirect
	golang.org/x/text v0.22.0 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a // indirect
	google.golang.org/protobuf v1.36.5 // indirect
)

github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
go.opentelemetry.io/otel/metric v1.34.0 h1:+eTR3U0MyfWjRDhmFMxe2SsW64QrZ84AOhvqS7Y+PoQ=
go.opentelemetry.io/otel/metric v1.34.0/go.mod h1:CEDrp0fy2D0MvkXE+dPV7cMi8tWZwX3dmaIhwPOaqHE=
go.opentelemetry.io/otel/sdk v1.34.0 h1:95zS4k/2GOy069d321O8jWgYsW3MzVV+KuSPKp7Wr1A=
go.opentelemetry.io/otel/sdk v1.34.0/go.mod h1:0e/pNiaMAqaykJGKbi+tSjWfNNHMTxoC9qANsCzbyxU=
go.opentelemetry.io/otel/sdk/metric v1.34.0 h1:5CeK9ujjbFVL5c1PhLuStg1wxA7vQv7ce1EK0Gyvahk=
go.opentelemetry.io/otel/sdk/metric v1.34.0/go.mod h1:jQ/r8Ze28zRKoNRdkjCZxfs6YvBTG1+YIqyFVFYec5w=
go.opentelemetry.io/otel/trace v1.34.0 h1:+ouXS2V8Rd4hp4580a8q23bg0azF2nI8cqLYnC8mh/k=
go.opentelemetry.io/otel/trace v1.34.0/go.mod h1:Svm7lSjQD7kG7KJ/MUHPVXSDGz2OX4h0M2jHBhmSfRE=
golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a h1:51aaUVRocpvUOSQKM6Q7VuoaktNIaMCLuhZB6DKksq4=
google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a/go.mod h1:uRxBH1mhmO8PGhU89cMcHaXKZqO+OfakD8QQO0oYwlQ=
google.golang.org/grpc v1.72.1 h1:HR03wO6eyZ7lknl75XlxABNVLLFc2PAb6mHlYh756mA=
google.golang.org/grpc v1.72.1/go.mod h1:wH5Aktxcg25y1I3w7H69nHfXdOG3UiadoBtjh3izSDM=
google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=

package main

import (
	"fmt"

	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/grpc/status"
)

func main() {
	fmt.Printf("grpc version: %s\n", grpc.Version)

	s := grpc.NewServer()
	defer s.Stop()

	st := status.New(codes.NotFound, "resource not found")
	fmt.Printf("status code: %s, message: %s\n", st.Code(), st.Message())

	md := metadata.Pairs("content-type", "application/grpc", "custom-header", "custom-value")
	fmt.Printf("metadata content-type: %v\n", md.Get("content-type"))
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/google.golang.org/grpc@v1.72.1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/grpc@v1.72.1"
  ]
}

package main

import (
	"errors"
	"fmt"
	"os"

	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/grpc/status"
)

func main() {
	// Assertion 1: grpc.Version exposes the package version string matching "1.72.1"
	if grpc.Version != "1.72.1" {
		fmt.Fprintf(os.Stderr, "FAIL: expected grpc.Version == 1.72.1, got %q\n", grpc.Version)
		os.Exit(1)
	}

	// Assertion 2: grpc.NewServer initializes a functional gRPC server instance that can be stopped
	s := grpc.NewServer()
	if s == nil {
		fmt.Fprintf(os.Stderr, "FAIL: grpc.NewServer returned nil\n")
		os.Exit(1)
	}
	s.Stop()

	// Assertion 3: codes.Code formats canonical gRPC status codes to string representations
	if got := codes.OK.String(); got != "OK" {
		fmt.Fprintf(os.Stderr, "FAIL: codes.OK.String() = %q, want OK\n", got)
		os.Exit(1)
	}
	if got := codes.NotFound.String(); got != "NotFound" {
		fmt.Fprintf(os.Stderr, "FAIL: codes.NotFound.String() = %q, want NotFound\n", got)
		os.Exit(1)
	}
	if got := codes.InvalidArgument.String(); got != "InvalidArgument" {
		fmt.Fprintf(os.Stderr, "FAIL: codes.InvalidArgument.String() = %q, want InvalidArgument\n", got)
		os.Exit(1)
	}

	// Assertion 4: status.New constructs a Status value carrying the specified code and message
	st := status.New(codes.NotFound, "resource not found")
	if st == nil {
		fmt.Fprintf(os.Stderr, "FAIL: status.New returned nil\n")
		os.Exit(1)
	}
	if st.Code() != codes.NotFound {
		fmt.Fprintf(os.Stderr, "FAIL: st.Code() = %v, want NotFound\n", st.Code())
		os.Exit(1)
	}
	if st.Message() != "resource not found" {
		fmt.Fprintf(os.Stderr, "FAIL: st.Message() = %q, want 'resource not found'\n", st.Message())
		os.Exit(1)
	}

	// Assertion 5: status.Code extracts canonical code from status error, OK from nil, and Unknown from generic error
	err := st.Err()
	if got := status.Code(err); got != codes.NotFound {
		fmt.Fprintf(os.Stderr, "FAIL: status.Code(err) = %v, want NotFound\n", got)
		os.Exit(1)
	}
	if got := status.Code(nil); got != codes.OK {
		fmt.Fprintf(os.Stderr, "FAIL: status.Code(nil) = %v, want OK\n", got)
		os.Exit(1)
	}
	genericErr := errors.New("arbitrary non-grpc error")
	if got := status.Code(genericErr); got != codes.Unknown {
		fmt.Fprintf(os.Stderr, "FAIL: status.Code(genericErr) = %v, want Unknown\n", got)
		os.Exit(1)
	}

	// Assertion 6: metadata.Pairs creates structured multi-value metadata accessible via Get
	md := metadata.Pairs("content-type", "application/grpc", "custom-header", "v1", "custom-header", "v2")
	if ct := md.Get("content-type"); len(ct) != 1 || ct[0] != "application/grpc" {
		fmt.Fprintf(os.Stderr, "FAIL: metadata.Get(content-type) = %v\n", ct)
		os.Exit(1)
	}
	if vals := md.Get("custom-header"); len(vals) != 2 || vals[0] != "v1" || vals[1] != "v2" {
		fmt.Fprintf(os.Stderr, "FAIL: metadata.Get(custom-header) = %v\n", vals)
		os.Exit(1)
	}

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