CodeSampleX

Ejemplo

google.golang.org/grpc v1.27.0

Muestra verificada para golang google.golang.org/grpc v1.27.0. El contrato se ejecutó en go 1.26 · linux debian/x64 · docker y pasó.

sha256:f2097c544b1ac52ed0d05356b6cc61d9fe4647be0d6ca99c16406548aa7b7f3b

Esta red ofrece una sola cosa: una muestra que compila. La ejecutó en un sandbox y guardó el recibo firmado. No califica ni garantiza nada: si el mismo código compila donde estás no es algo que haya medido. Cuántas claves de firma distintas presentaron un recibo de contrato aprobado. Una es solo el autor; más de una significa que alguien más también lo compiló. Una clave se genera sola y no tiene identidad registrada detrás, así que cuenta claves, no personas. MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia
Contrato firmado aprobado
Recibos de verificación
1
Claves de firma que lo compilaron
1
Entorno declarado linux 24 · ubuntu · glibc 2.39 x64 go

Entornos de las ejecuciones de verificación

Entorno Contrato Etapas Ejecución
go 1.26 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26@sha256:e30143be198a…		 2026-10-17

Caso

HOW
Objetivo
verify pkg:golang/google.golang.org/grpc@v1.27.0
Paquetes
Creado
2026-10-17T05:02:55Z

Contrato

  1. grpc.NewServer registers a unary ServiceDesc and reports the method via GetServiceInfo
  2. grpc.DialContext with bufconn.Listen and grpc.WithInsecure invokes the unary method with outgoing metadata and receives the expected response
  3. missing required incoming metadata returns codes.InvalidArgument via status.Error and is observed with status.Code on the client

Archivos

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • test/contract.go

Descargar el artefacto de código fuente (tar.gz)

Código fuente

PROMPT.md
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@v1.27.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/grpc@v1.27.0

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.
csx.json
{"case":{"caseId":"case:sha256:9cb65e3bb67738d2374479640340ea64b872f958ce1b6a67e9dca82c1fda6840","contract":["grpc.NewServer registers a unary ServiceDesc and reports the method via GetServiceInfo","grpc.DialContext with bufconn.Listen and grpc.WithInsecure invokes the unary method with outgoing metadata and receives the expected response","missing required incoming metadata returns codes.InvalidArgument via status.Error and is observed with status.Code on the client"],"goal":"verify pkg:golang/google.golang.org/grpc@v1.27.0","kind":"HOW","packages":["pkg:golang/google.golang.org/grpc@v1.27.0"],"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/grpc@v1.27.0"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/grpc@v1.27.0","verifierAdapter":"golang@1"}
go.mod
module sample

go 1.21

require google.golang.org/grpc v1.27.0

require (
	github.com/golang/protobuf v1.3.2 // indirect
	golang.org/x/net v0.0.0-20190311183353-d8887717615a // indirect
	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a // indirect
	golang.org/x/text v0.3.0 // indirect
	google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 // indirect
)
go.sum
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.27.0 h1:rRYRFMVgRv6E0D70Skyfsr28tDXIuuPZyWGMPdMcnXg=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/google.golang.org/grpc@v1.27.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/grpc@v1.27.0"
  ]
}
test/contract.go
package main

import (
	"context"
	"fmt"
	"net"
	"os"
	"time"

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

type byteCodec struct{}

func (byteCodec) Marshal(v interface{}) ([]byte, error) {
	b, ok := v.(*[]byte)
	if !ok {
		return nil, fmt.Errorf("unexpected marshal type %T", v)
	}
	return *b, nil
}

func (byteCodec) Unmarshal(data []byte, v interface{}) error {
	b, ok := v.(*[]byte)
	if !ok {
		return fmt.Errorf("unexpected unmarshal type %T", v)
	}
	*b = append((*b)[:0], data...)
	return nil
}

func (byteCodec) String() string {
	return "bytes"
}

type echoService interface {
	Echo(ctx context.Context, in *[]byte) (*[]byte, error)
}

type echoServer struct{}

func (s *echoServer) Echo(ctx context.Context, in *[]byte) (*[]byte, error) {
	md, ok := metadata.FromIncomingContext(ctx)
	if !ok || len(md.Get("x-req-id")) == 0 || md.Get("x-req-id")[0] != "req-42" {
		return nil, status.Error(codes.InvalidArgument, "missing metadata")
	}
	out := []byte("ack:" + string(*in))
	return &out, nil
}

func echoHandler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
	in := new([]byte)
	if err := dec(in); err != nil {
		return nil, err
	}
	if interceptor == nil {
		return srv.(echoService).Echo(ctx, in)
	}
	info := &grpc.UnaryServerInfo{
		Server:     srv,
		FullMethod: "/sample.EchoService/Echo",
	}
	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
		return srv.(echoService).Echo(ctx, req.(*[]byte))
	}
	return interceptor(ctx, in, info, handler)
}

func main() {
	lis := bufconn.Listen(1024 * 1024)
	defer lis.Close()

	srv := grpc.NewServer(grpc.CustomCodec(byteCodec{}))
	srv.RegisterService(&grpc.ServiceDesc{
		ServiceName: "sample.EchoService",
		HandlerType: (*echoService)(nil),
		Methods: []grpc.MethodDesc{
			{
				MethodName: "Echo",
				Handler:    echoHandler,
			},
		},
		Streams:  []grpc.StreamDesc{},
		Metadata: "sample.proto",
	}, &echoServer{})

	info := srv.GetServiceInfo()
	svcInfo, ok := info["sample.EchoService"]
	if !ok || len(svcInfo.Methods) != 1 || svcInfo.Methods[0].Name != "Echo" {
		fmt.Fprintln(os.Stderr, "service registration check failed")
		os.Exit(1)
	}

	go func() {
		_ = srv.Serve(lis)
	}()
	defer srv.Stop()

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	conn, err := grpc.DialContext(
		ctx,
		"bufnet",
		grpc.WithContextDialer(func(ctx context.Context, _ string) (net.Conn, error) {
			return lis.Dial()
		}),
		grpc.WithInsecure(),
		grpc.WithDefaultCallOptions(grpc.CallCustomCodec(byteCodec{})),
	)
	if err != nil {
		fmt.Fprintf(os.Stderr, "dial failed: %v\n", err)
		os.Exit(1)
	}
	defer conn.Close()

	outCtx := metadata.AppendToOutgoingContext(ctx, "x-req-id", "req-42")
	req := []byte("ping")
	var resp []byte
	if err := conn.Invoke(outCtx, "/sample.EchoService/Echo", &req, &resp); err != nil {
		fmt.Fprintf(os.Stderr, "invoke failed: %v\n", err)
		os.Exit(1)
	}
	if string(resp) != "ack:ping" {
		fmt.Fprintf(os.Stderr, "unexpected response: %q\n", string(resp))
		os.Exit(1)
	}

	var badResp []byte
	err = conn.Invoke(ctx, "/sample.EchoService/Echo", &req, &badResp)
	if status.Code(err) != codes.InvalidArgument {
		fmt.Fprintf(os.Stderr, "expected InvalidArgument, got %v\n", err)
		os.Exit(1)
	}

	fmt.Println("contract ok")
}

Seeder de origen

anónimo