[#341] Add notifications controller

Signed-off-by: Angira Kekteeva <kira@nspcc.ru>

api/notifications/controller.go

@@ -0,0 +1,51 @@
+package notifications
+
+import (
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+const (
+	DefaultTimeout = 30 * time.Second
+)
+
+type Options struct {
+	URL                       string
+	TLSCertFilepath           string
+	TLSAuthPrivateKeyFilePath string
+	Timeout                   time.Duration
+	RootCAFiles               []string
+}
+
+type Controller struct {
+	taskQueueConnection *nats.Conn
+	jsClient            nats.JetStream
+}
+
+func NewController(p *Options) (*Controller, error) {
+	if p == nil {
+		return nil, nil
+	}
+
+	ncopts := []nats.Option{
+		nats.ClientCert(p.TLSCertFilepath, p.TLSAuthPrivateKeyFilePath),
+		nats.RootCAs(p.RootCAFiles...),
+		nats.Timeout(p.Timeout),
+	}
+
+	nc, err := nats.Connect(p.URL, ncopts...)
+	if err != nil {
+		return nil, err
+	}
+
+	js, err := nc.JetStream()
+	if err != nil {
+		return nil, err
+	}
+
+	return &Controller{
+		taskQueueConnection: nc,
+		jsClient:            js,
+	}, nil
+}

cmd/s3-gw/app.go

@@ -16,6 +16,7 @@ import (
 	"github.com/nspcc-dev/neofs-s3-gw/api/cache"
 	"github.com/nspcc-dev/neofs-s3-gw/api/handler"
 	"github.com/nspcc-dev/neofs-s3-gw/api/layer"
+	"github.com/nspcc-dev/neofs-s3-gw/api/notifications"
 	"github.com/nspcc-dev/neofs-s3-gw/api/resolver"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/version"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/wallet"
@@ -35,6 +36,7 @@ type (
 		tls  *tlsConfig
 		obj  layer.Client
 		api  api.Handler
+		nc   *notifications.Controller
 
 		maxClients api.MaxClients
 
@@ -141,6 +143,12 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		l.Fatal("failed to form resolver", zap.Error(err))
 	}
 
+	nopts := getNotificationsOptions(v, l)
+	nc, err := notifications.NewController(nopts)
+	if err != nil {
+		l.Fatal("failed to enable notifications", zap.Error(err))
+	}
+
 	layerCfg := &layer.Config{
 		Caches: getCacheOptions(v, l),
 		AnonKey: layer.AnonymousKey{
@@ -169,6 +177,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		obj:  obj,
 		tls:  tls,
 		api:  caller,
+		nc:   nc,
 
 		webDone: make(chan struct{}, 1),
 		wrkDone: make(chan struct{}, 1),
@@ -251,6 +260,28 @@ func (a *App) Server(ctx context.Context) {
 	close(a.webDone)
 }
 
+func getNotificationsOptions(v *viper.Viper, l *zap.Logger) *notifications.Options {
+	if enabled := v.GetBool(cfgEnableNATS); !enabled {
+		return nil
+	}
+
+	cfg := notifications.Options{}
+	cfg.URL = v.GetString(cfgNATSEndpoint)
+	cfg.Timeout = v.GetDuration(cfgNATSTimeout)
+	if cfg.Timeout <= 0 {
+		l.Error("invalid lifetime, using default value (in seconds)",
+			zap.String("parameter", cfgNATSTimeout),
+			zap.Duration("value in config", cfg.Timeout),
+			zap.Duration("default", notifications.DefaultTimeout))
+		cfg.Timeout = notifications.DefaultTimeout
+	}
+	cfg.TLSCertFilepath = v.GetString(cfgNATSTLSCertFile)
+	cfg.TLSAuthPrivateKeyFilePath = v.GetString(cfgNATSAuthPrivateKeyFile)
+	cfg.RootCAFiles = v.GetStringSlice(cfgNATSRootCAFiles)
+
+	return &cfg
+}
+
 func getCacheOptions(v *viper.Viper, l *zap.Logger) *layer.CachesConfig {
 	cacheCfg := layer.DefaultCachesConfigs()
 

cmd/s3-gw/app_settings.go

@@ -69,6 +69,14 @@ const ( // Settings.
 	cfgAccessBoxCacheLifetime   = "cache.accessbox.lifetime"
 	cfgAccessBoxCacheSize       = "cache.accessbox.size"
 
+	// NATS.
+	cfgEnableNATS             = "nats.enabled"
+	cfgNATSEndpoint           = "nats.endpoint"
+	cfgNATSTimeout            = "nats.timeout"
+	cfgNATSTLSCertFile        = "nats.cert_file"
+	cfgNATSAuthPrivateKeyFile = "nats.key_file"
+	cfgNATSRootCAFiles        = "nats.root_ca"
+
 	// Policy.
 	cfgDefaultPolicy = "default_policy"
 

go.mod

@@ -9,6 +9,8 @@ require (
 	github.com/golang/mock v1.6.0 // indirect
 	github.com/google/uuid v1.2.0
 	github.com/gorilla/mux v1.8.0
+	github.com/nats-io/nats-server/v2 v2.7.1 // indirect
+	github.com/nats-io/nats.go v1.13.1-0.20220121202836-972a071d373d
 	github.com/nspcc-dev/neo-go v0.98.0
 	github.com/nspcc-dev/neofs-api-go/v2 v2.11.2-0.20220114101721-227a871a04ac
 	github.com/nspcc-dev/neofs-sdk-go v0.0.0-20220121080144-596774ce5bd3
@@ -18,7 +20,7 @@ require (
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.3.0
 	go.uber.org/zap v1.18.1
-	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97
+	golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce
 	golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f // indirect
 	google.golang.org/grpc v1.41.0
 	google.golang.org/protobuf v1.27.1

go.sum

@@ -141,8 +141,9 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
-github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.3 h1:fHPg5GQYlCeLIPB9BZqMVR5nR9A+IM5zcgeTdjMYmLA=
+github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -222,6 +223,8 @@ github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
+github.com/klauspost/compress v1.13.4 h1:0zhec2I8zGnjWcKyLl6i3gPqKANCCn5e9xmviEEeX6s=
+github.com/klauspost/compress v1.13.4/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
@@ -246,6 +249,8 @@ github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Ky
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
+github.com/minio/highwayhash v1.0.1 h1:dZ6IIu8Z14VlC0VpfKofAhCy74wu/Qb5gcn52yWoz/0=
+github.com/minio/highwayhash v1.0.1/go.mod h1:BQskDq+xkJ12lmlUUi7U0M5Swg3EWR+dLTk+kldvVxY=
 github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
 github.com/mitchellh/go-homedir v1.0.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eIhFbs2+BFgRtFPeD/KE+zxI=
@@ -263,6 +268,16 @@ github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
 github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
+github.com/nats-io/jwt/v2 v2.2.1-0.20220113022732-58e87895b296 h1:vU9tpM3apjYlLLeY23zRWJ9Zktr5jp+mloR942LEOpY=
+github.com/nats-io/jwt/v2 v2.2.1-0.20220113022732-58e87895b296/go.mod h1:0tqz9Hlu6bCBFLWAASKhE5vUA4c24L9KPUUgvwumE/k=
+github.com/nats-io/nats-server/v2 v2.7.1 h1:SDj8R0PJPVekw3EgHxGtTfJUuMbsuaul1nwWFI3xTyk=
+github.com/nats-io/nats-server/v2 v2.7.1/go.mod h1:tckmrt0M6bVaDT3kmh9UrIq/CBOBBse+TpXQi5ldaa8=
+github.com/nats-io/nats.go v1.13.1-0.20220121202836-972a071d373d h1:GRSmEJutHkdoxKsRypP575IIdoXe7Bm6yHQF6GcDBnA=
+github.com/nats-io/nats.go v1.13.1-0.20220121202836-972a071d373d/go.mod h1:BPko4oXsySz4aSWeFgOHLZs3G4Jq4ZAyE6/zMCxRT6w=
+github.com/nats-io/nkeys v0.3.0 h1:cgM5tL53EvYRU+2YLXIK0G2mJtK12Ft9oeooSZMA2G8=
+github.com/nats-io/nkeys v0.3.0/go.mod h1:gvUNGjVcM2IPr5rCsRsC6Wb3Hr2CQAm08dsxtV6A5y4=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/nspcc-dev/dbft v0.0.0-20191205084618-dacb1a30c254/go.mod h1:w1Ln2aT+dBlPhLnuZhBV+DfPEdS2CHWWLp5JTScY3bw=
 github.com/nspcc-dev/dbft v0.0.0-20191209120240-0d6b7568d9ae/go.mod h1:3FjXOoHmA51EGfb5GS/HOv7VdmngNRTssSeQ729dvGY=
 github.com/nspcc-dev/dbft v0.0.0-20200117124306-478e5cfbf03a/go.mod h1:/YFK+XOxxg0Bfm6P92lY5eDSLYfp06XOdL8KAVgXjVk=
@@ -431,8 +446,10 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 h1:/UOmuWzQfxxo9UtlXMwuQU8CMgg1eZXqTRwkSQJWKOI=
+golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce h1:Roh6XWxHFKrPgC/EQhVubSAGQ6Ozk6IdxHSzt1mR0EI=
+golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -479,8 +496,9 @@ golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -502,6 +520,7 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190130150945-aca44879d564/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190204203706-41f3e6584952/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -531,10 +550,12 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
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+golang.org/x/sys v0.0.0-20220111092808-5a964db01320 h1:0jf+tOCoZ3LyutmCOWpVni1chK4VfFLhRsDK7MhqGRY=
+golang.org/x/sys v0.0.0-20220111092808-5a964db01320/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210429154555-c04ba851c2a4 h1:UPou2i3GzKgi6igR+/0C5XyHKBngHxBp/CL5CQ0p3Zk=
 golang.org/x/term v0.0.0-20210429154555-c04ba851c2a4/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
@@ -546,6 +567,8 @@ golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 h1:GZokNIeuVkl3aZHJchRrr13WCsols02MLUcz1U9is6M=
+golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180318012157-96caea41033d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=