diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
index c198e6a..826caa3 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
@@ -200,3 +200,5 @@
 
 #vendor
 vendor/
+
+.envrc
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
index 702fa5b..fc198d8 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
@@ -1,21 +1,16 @@
 sudo: false
 language: go
 go:
-  - 1.8.x
+  - 1.13.x
+  - 1.14.x
+  - 1.15.x
+
 env:
-  - DEP_VERSION="0.3.2"
-
-before_install:
-  # Download the binary to bin folder in $GOPATH
-  - curl -L -s https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 -o $GOPATH/bin/dep
-  # Make the binary executable
-  - chmod +x $GOPATH/bin/dep
-
-install:
-  - dep ensure
+  global:
+    - GO111MODULE=on
 
 script:
  - make test
- 
+
 after_success:
   - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md
index 0e64822..6eeb7e2 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CHANGELOG.md
@@ -13,10 +13,30 @@
 - `Security` in case of vulnerabilities.
 
 ## [Unreleased]
-### Added
-- This CHANGELOG file to keep track of changes.
 
-## 1.0.0 - 2018-05-08
+### Added
+
+- [#223](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/223) Add go-kit logging middleware - [adrien-f](https://github.com/adrien-f)
+
+## [v1.1.0] - 2019-09-12
+### Added
+- [#226](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/226) Support for go modules.
+- [#221](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/221) logging/zap add support for gRPC LoggerV2  - [kush-patel-hs](https://github.com/kush-patel-hs)
+- [#181](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/181) Rate Limit support - [ceshihao](https://github.com/ceshihao)
+- [#161](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/161) Retry on server stream call - [lonnblad](https://github.com/lonnblad)
+- [#152](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/152) Exponential backoff functions - [polyfloyd](https://github.com/polyfloyd)
+- [#147](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/147) Jaeger support for ctxtags extraction - [vporoshok](https://github.com/vporoshok)
+- [#184](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/184) ctxTags identifies if the call was sampled
+
+### Deprecated
+- [#201](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/201) `golang.org/x/net/context` - [houz42](https://github.com/houz42)
+- [#183](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/183) Documentation Generation in favour of <godoc.org>.
+
+### Fixed
+- [172](https://github.com/grpc-ecosystem/go-grpc-middleware/pull/172) Passing ctx into retry and recover - [johanbrandhorst](https://github.com/johanbrandhorst)
+- Numerious documentation fixes.
+
+## v1.0.0 - 2018-05-08
 ### Added
 - grpc_auth 
 - grpc_ctxtags
@@ -27,4 +47,5 @@
 - grpc_validator
 - grpc_recovery
 
-[Unreleased]: https://github.com/grpc-ecosystem/go-grpc-middleware/compare/v1.0.0...HEAD 
+[Unreleased]: https://github.com/grpc-ecosystem/go-grpc-middleware/compare/v1.1.0...HEAD 
+[v1.1.0]: https://github.com/grpc-ecosystem/go-grpc-middleware/compare/v1.0.0...v1.1.0 
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
deleted file mode 100644
index ebdcb75..0000000
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
+++ /dev/null
@@ -1,123 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  name = "cloud.google.com/go"
-  packages = ["compute/metadata"]
-  revision = "2d3a6656c17a60b0815b7e06ab0be04eacb6e613"
-  version = "v0.16.0"
-
-[[projects]]
-  name = "github.com/davecgh/go-spew"
-  packages = ["spew"]
-  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
-  version = "v1.1.0"
-
-[[projects]]
-  name = "github.com/gogo/protobuf"
-  packages = ["gogoproto","proto","protoc-gen-gogo/descriptor"]
-  revision = "342cbe0a04158f6dcb03ca0079991a51a4248c02"
-  version = "v0.5"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/golang/protobuf"
-  packages = ["jsonpb","proto","ptypes","ptypes/any","ptypes/duration","ptypes/struct","ptypes/timestamp"]
-  revision = "1e59b77b52bf8e4b449a57e6f79f21226d571845"
-
-[[projects]]
-  name = "github.com/opentracing/opentracing-go"
-  packages = [".","ext","log","mocktracer"]
-  revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
-  version = "v1.0.2"
-
-[[projects]]
-  name = "github.com/pmezard/go-difflib"
-  packages = ["difflib"]
-  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
-  version = "v1.0.0"
-
-[[projects]]
-  name = "github.com/sirupsen/logrus"
-  packages = ["."]
-  revision = "f006c2ac4710855cf0f916dd6b77acf6b048dc6e"
-  version = "v1.0.3"
-
-[[projects]]
-  name = "github.com/stretchr/testify"
-  packages = ["assert","require","suite"]
-  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
-  version = "v1.1.4"
-
-[[projects]]
-  name = "go.uber.org/atomic"
-  packages = ["."]
-  revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
-  version = "v1.3.1"
-
-[[projects]]
-  name = "go.uber.org/multierr"
-  packages = ["."]
-  revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
-  version = "v1.1.0"
-
-[[projects]]
-  name = "go.uber.org/zap"
-  packages = [".","buffer","internal/bufferpool","internal/color","internal/exit","zapcore"]
-  revision = "35aad584952c3e7020db7b839f6b102de6271f89"
-  version = "v1.7.1"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/crypto"
-  packages = ["ssh/terminal"]
-  revision = "94eea52f7b742c7cbe0b03b22f0c4c8631ece122"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/net"
-  packages = ["context","context/ctxhttp","http2","http2/hpack","idna","internal/timeseries","lex/httplex","trace"]
-  revision = "a8b9294777976932365dabb6640cf1468d95c70f"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/oauth2"
-  packages = [".","google","internal","jws","jwt"]
-  revision = "f95fa95eaa936d9d87489b15d1d18b97c1ba9c28"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/sys"
-  packages = ["unix","windows"]
-  revision = "13fcbd661c8ececa8807a29b48407d674b1d8ed8"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/text"
-  packages = ["collate","collate/build","internal/colltab","internal/gen","internal/tag","internal/triegen","internal/ucd","language","secure/bidirule","transform","unicode/bidi","unicode/cldr","unicode/norm","unicode/rangetable"]
-  revision = "75cc3cad82b5f47d3fb229ddda8c5167da14f294"
-
-[[projects]]
-  name = "google.golang.org/appengine"
-  packages = [".","internal","internal/app_identity","internal/base","internal/datastore","internal/log","internal/modules","internal/remote_api","internal/urlfetch","urlfetch"]
-  revision = "150dc57a1b433e64154302bdc40b6bb8aefa313a"
-  version = "v1.0.0"
-
-[[projects]]
-  branch = "master"
-  name = "google.golang.org/genproto"
-  packages = ["googleapis/rpc/status"]
-  revision = "7f0da29060c682909f650ad8ed4e515bd74fa12a"
-
-[[projects]]
-  name = "google.golang.org/grpc"
-  packages = [".","balancer","balancer/roundrobin","codes","connectivity","credentials","credentials/oauth","encoding","grpclb/grpc_lb_v1/messages","grpclog","internal","keepalive","metadata","naming","peer","resolver","resolver/dns","resolver/passthrough","stats","status","tap","transport"]
-  revision = "5a9f7b402fe85096d2e1d0383435ee1876e863d0"
-  version = "v1.8.0"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "b24c6670412eb0bc44ed1db77fecc52333f8725f3e3272bdc568f5683a63031f"
-  solver-name = "gps-cdcl"
-  solver-version = 1
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
deleted file mode 100644
index 0a7d4c1..0000000
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
+++ /dev/null
@@ -1,35 +0,0 @@
-[[constraint]]
-  name = "github.com/gogo/protobuf"
-  version = "0.5.0"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/golang/protobuf"
-
-[[constraint]]
-  name = "github.com/opentracing/opentracing-go"
-  version = "1.0.2"
-
-[[constraint]]
-  name = "github.com/sirupsen/logrus"
-  version = "1.0.3"
-
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "1.1.4"
-
-[[constraint]]
-  name = "go.uber.org/zap"
-  version = "1.7.1"
-
-[[constraint]]
-  branch = "master"
-  name = "golang.org/x/net"
-
-[[constraint]]
-  branch = "master"
-  name = "golang.org/x/oauth2"
-
-[[constraint]]
-  name = "google.golang.org/grpc"
-  version = "1.8.0"
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
index 224069b..814e155 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
@@ -7,7 +7,7 @@
 [![codecov](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware/branch/master/graph/badge.svg)](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware)
 [![Apache 2.0 License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
 [![quality: production](https://img.shields.io/badge/quality-production-orange.svg)](#status)
-[![Slack](slack.png)](https://join.slack.com/t/improbable-eng/shared_invite/enQtMzQ1ODcyMzQ5MjM4LWY5ZWZmNGM2ODc5MmViNmQ3ZTA3ZTY3NzQwOTBlMTkzZmIxZTIxODk0OWU3YjZhNWVlNDU3MDlkZGViZjhkMjc)
+[![Slack](https://img.shields.io/badge/slack-%23grpc--middleware-brightgreen)](https://slack.com/share/IRUQCFC23/9Tm7hxRFVKKNoajQfMOcUiIk/enQtODc4ODI4NTIyMDcxLWM5NDA0ZTE4Njg5YjRjYWZkMTI5MzQwNDY3YzBjMzE1YzdjOGM5ZjI1NDNiM2JmNzI2YjM5ODE5OTRiNTEyOWE)
 
 [gRPC Go](https://github.com/grpc/grpc-go) Middleware: interceptors, helpers, utilities.
 
@@ -15,7 +15,7 @@
 
 [gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for
 Interceptors, i.e. [middleware](https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81#.gv7tdlghs) 
-that is executed either on the gRPC Server before the request is passed onto the user's application logic, or on the gRPC client either around the user call. It is a perfect way to implement
+that is executed either on the gRPC Server before the request is passed onto the user's application logic, or on the gRPC client around the user call. It is a perfect way to implement
 common patterns: auth, logging, message, validation, retries or monitoring.
 
 These are generic building blocks that make it easy to build multiple microservices easily.
@@ -29,20 +29,20 @@
 
 myServer := grpc.NewServer(
     grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
+        grpc_recovery.StreamServerInterceptor(),
         grpc_ctxtags.StreamServerInterceptor(),
         grpc_opentracing.StreamServerInterceptor(),
         grpc_prometheus.StreamServerInterceptor,
         grpc_zap.StreamServerInterceptor(zapLogger),
         grpc_auth.StreamServerInterceptor(myAuthFunction),
-        grpc_recovery.StreamServerInterceptor(),
     )),
     grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+        grpc_recovery.UnaryServerInterceptor(),
         grpc_ctxtags.UnaryServerInterceptor(),
         grpc_opentracing.UnaryServerInterceptor(),
         grpc_prometheus.UnaryServerInterceptor,
         grpc_zap.UnaryServerInterceptor(zapLogger),
         grpc_auth.UnaryServerInterceptor(myAuthFunction),
-        grpc_recovery.UnaryServerInterceptor(),
     )),
 )
 ```
@@ -58,7 +58,8 @@
    * [`grpc_ctxtags`](tags/) - a library that adds a `Tag` map to context, with data populated from request body
    * [`grpc_zap`](logging/zap/) - integration of [zap](https://github.com/uber-go/zap) logging library into gRPC handlers.
    * [`grpc_logrus`](logging/logrus/) - integration of [logrus](https://github.com/sirupsen/logrus) logging library into gRPC handlers.
-
+   * [`grpc_kit`](logging/kit/) - integration of [go-kit](https://github.com/go-kit/kit/tree/master/log) logging library into gRPC handlers.
+   * [`grpc_grpc_logsettable`](logging/settable/) - a wrapper around `grpclog.LoggerV2` that allows to replace loggers in runtime (thread-safe).
 
 #### Monitoring
    * [`grpc_prometheus`⚡](https://github.com/grpc-ecosystem/go-grpc-prometheus) - Prometheus client-side and server-side monitoring middleware
@@ -71,6 +72,7 @@
 #### Server
    * [`grpc_validator`](validator/) - codegen inbound message validation from `.proto` options
    * [`grpc_recovery`](recovery/) - turn panics into gRPC errors
+   * [`ratelimit`](ratelimit/) - grpc rate limiting by your own limiter
 
 
 ## Status
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
index 45a2f5f..ea3738b 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
@@ -6,7 +6,8 @@
 package grpc_middleware
 
 import (
-	"golang.org/x/net/context"
+	"context"
+
 	"google.golang.org/grpc"
 )
 
@@ -18,35 +19,19 @@
 func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor {
 	n := len(interceptors)
 
-	if n > 1 {
-		lastI := n - 1
-		return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-			var (
-				chainHandler grpc.UnaryHandler
-				curI         int
-			)
-
-			chainHandler = func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
-				if curI == lastI {
-					return handler(currentCtx, currentReq)
-				}
-				curI++
-				resp, err := interceptors[curI](currentCtx, currentReq, info, chainHandler)
-				curI--
-				return resp, err
+	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+		chainer := func(currentInter grpc.UnaryServerInterceptor, currentHandler grpc.UnaryHandler) grpc.UnaryHandler {
+			return func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
+				return currentInter(currentCtx, currentReq, info, currentHandler)
 			}
-
-			return interceptors[0](ctx, req, info, chainHandler)
 		}
-	}
 
-	if n == 1 {
-		return interceptors[0]
-	}
+		chainedHandler := handler
+		for i := n - 1; i >= 0; i-- {
+			chainedHandler = chainer(interceptors[i], chainedHandler)
+		}
 
-	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-		return handler(ctx, req)
+		return chainedHandler(ctx, req)
 	}
 }
 
@@ -58,35 +43,19 @@
 func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor {
 	n := len(interceptors)
 
-	if n > 1 {
-		lastI := n - 1
-		return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-			var (
-				chainHandler grpc.StreamHandler
-				curI         int
-			)
-
-			chainHandler = func(currentSrv interface{}, currentStream grpc.ServerStream) error {
-				if curI == lastI {
-					return handler(currentSrv, currentStream)
-				}
-				curI++
-				err := interceptors[curI](currentSrv, currentStream, info, chainHandler)
-				curI--
-				return err
+	return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+		chainer := func(currentInter grpc.StreamServerInterceptor, currentHandler grpc.StreamHandler) grpc.StreamHandler {
+			return func(currentSrv interface{}, currentStream grpc.ServerStream) error {
+				return currentInter(currentSrv, currentStream, info, currentHandler)
 			}
-
-			return interceptors[0](srv, stream, info, chainHandler)
 		}
-	}
 
-	if n == 1 {
-		return interceptors[0]
-	}
+		chainedHandler := handler
+		for i := n - 1; i >= 0; i-- {
+			chainedHandler = chainer(interceptors[i], chainedHandler)
+		}
 
-	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
-	return func(srv interface{}, stream grpc.ServerStream, _ *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
-		return handler(srv, stream)
+		return chainedHandler(srv, ss)
 	}
 }
 
@@ -97,35 +66,19 @@
 func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor {
 	n := len(interceptors)
 
-	if n > 1 {
-		lastI := n - 1
-		return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
-			var (
-				chainHandler grpc.UnaryInvoker
-				curI         int
-			)
-
-			chainHandler = func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error {
-				if curI == lastI {
-					return invoker(currentCtx, currentMethod, currentReq, currentRepl, currentConn, currentOpts...)
-				}
-				curI++
-				err := interceptors[curI](currentCtx, currentMethod, currentReq, currentRepl, currentConn, chainHandler, currentOpts...)
-				curI--
-				return err
-			}
-
-			return interceptors[0](ctx, method, req, reply, cc, chainHandler, opts...)
-		}
-	}
-
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
 	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
-		return invoker(ctx, method, req, reply, cc, opts...)
+		chainer := func(currentInter grpc.UnaryClientInterceptor, currentInvoker grpc.UnaryInvoker) grpc.UnaryInvoker {
+			return func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error {
+				return currentInter(currentCtx, currentMethod, currentReq, currentRepl, currentConn, currentInvoker, currentOpts...)
+			}
+		}
+
+		chainedInvoker := invoker
+		for i := n - 1; i >= 0; i-- {
+			chainedInvoker = chainer(interceptors[i], chainedInvoker)
+		}
+
+		return chainedInvoker(ctx, method, req, reply, cc, opts...)
 	}
 }
 
@@ -136,35 +89,19 @@
 func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor {
 	n := len(interceptors)
 
-	if n > 1 {
-		lastI := n - 1
-		return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
-			var (
-				chainHandler grpc.Streamer
-				curI         int
-			)
-
-			chainHandler = func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) {
-				if curI == lastI {
-					return streamer(currentCtx, currentDesc, currentConn, currentMethod, currentOpts...)
-				}
-				curI++
-				stream, err := interceptors[curI](currentCtx, currentDesc, currentConn, currentMethod, chainHandler, currentOpts...)
-				curI--
-				return stream, err
-			}
-
-			return interceptors[0](ctx, desc, cc, method, chainHandler, opts...)
-		}
-	}
-
-	if n == 1 {
-		return interceptors[0]
-	}
-
-	// n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
 	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
-		return streamer(ctx, desc, cc, method, opts...)
+		chainer := func(currentInter grpc.StreamClientInterceptor, currentStreamer grpc.Streamer) grpc.Streamer {
+			return func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) {
+				return currentInter(currentCtx, currentDesc, currentConn, currentMethod, currentStreamer, currentOpts...)
+			}
+		}
+
+		chainedStreamer := streamer
+		for i := n - 1; i >= 0; i-- {
+			chainedStreamer = chainer(interceptors[i], chainedStreamer)
+		}
+
+		return chainedStreamer(ctx, desc, cc, method, opts...)
 	}
 }
 
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
index 7168950..718e100 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
@@ -23,7 +23,7 @@
 
 	myServer := grpc.NewServer(
 	    grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(loggingStream, monitoringStream, authStream)),
-	    grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary),
+	    grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary)),
 	)
 
 These interceptors will be executed from left to right: logging, monitoring and auth.
@@ -63,7 +63,7 @@
 	func FakeAuthStreamingInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
 	   newStream := grpc_middleware.WrapServerStream(stream)
 	   newStream.WrappedContext = context.WithValue(ctx, "user_id", "john@example.com")
-	   return handler(srv, stream)
+	   return handler(srv, newStream)
 	}
 */
 package grpc_middleware
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.mod b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.mod
new file mode 100644
index 0000000..7dc62e5
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.mod
@@ -0,0 +1,22 @@
+module github.com/grpc-ecosystem/go-grpc-middleware
+
+require (
+	github.com/go-kit/kit v0.9.0
+	github.com/go-logfmt/logfmt v0.4.0 // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/gogo/protobuf v1.3.2
+	github.com/golang/protobuf v1.3.3
+	github.com/opentracing/opentracing-go v1.1.0
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/sirupsen/logrus v1.4.2
+	github.com/stretchr/testify v1.4.0
+	go.uber.org/atomic v1.4.0 // indirect
+	go.uber.org/multierr v1.1.0 // indirect
+	go.uber.org/zap v1.10.0
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974
+	golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be
+	google.golang.org/genproto v0.0.0-20200423170343-7949de9c1215 // indirect
+	google.golang.org/grpc v1.29.1
+)
+
+go 1.14
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.sum b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.sum
new file mode 100644
index 0000000..ee522cd
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/go.sum
@@ -0,0 +1,122 @@
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+google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
+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/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200423170343-7949de9c1215 h1:0Uz5jLJQioKgVozXa1gzGbzYxbb/rhQEVvSWxzw5oUs=
+google.golang.org/genproto v0.0.0-20200423170343-7949de9c1215/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+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 v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.29.1 h1:EC2SB8S04d2r73uptxphDSUG+kTKVgjRPF+N3xpxRB4=
+google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+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=
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
index 51dc5b8..b18d2d2 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
@@ -8,7 +8,8 @@
 	go fmt $(GOFILES_NOVENDOR)
 
 vet:
-	go vet $(GOFILES_NOVENDOR)
+	# do not check lostcancel, they are intentional.
+	go vet -lostcancel=false $(GOFILES_NOVENDOR)
 
 test: vet
 	./scripts/test_all.sh
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/context.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/context.go
index 583025c..0da1658 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/context.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/context.go
@@ -69,10 +69,10 @@
 	return t
 }
 
-func setInContext(ctx context.Context, tags Tags) context.Context {
+func SetInContext(ctx context.Context, tags Tags) context.Context {
 	return context.WithValue(ctx, ctxMarkerKey, tags)
 }
 
-func newTags() Tags {
+func NewTags() Tags {
 	return &mapTags{values: make(map[string]interface{})}
 }
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/fieldextractor.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/fieldextractor.go
index 549ff48..a4073ab 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/fieldextractor.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/fieldextractor.go
@@ -64,10 +64,10 @@
 		field := v.Field(i)
 		kind := field.Kind()
 		// Only recurse down direct pointers, which should only be to nested structs.
-		if kind == reflect.Ptr {
+		if (kind == reflect.Ptr || kind == reflect.Interface) && field.CanInterface() {
 			reflectMessageTags(field.Interface(), existingMap, tagName)
 		}
-		// In case of arrays/splices (repeated fields) go down to the concrete type.
+		// In case of arrays/slices (repeated fields) go down to the concrete type.
 		if kind == reflect.Array || kind == reflect.Slice {
 			if field.Len() == 0 {
 				continue
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/interceptors.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/interceptors.go
index 038afd2..a7ced60 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/interceptors.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/interceptors.go
@@ -4,10 +4,12 @@
 package grpc_ctxtags
 
 import (
-	"github.com/grpc-ecosystem/go-grpc-middleware"
-	"golang.org/x/net/context"
+	"context"
+
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/peer"
+
+	"github.com/grpc-ecosystem/go-grpc-middleware"
 )
 
 // UnaryServerInterceptor returns a new unary server interceptors that sets the values for request tags.
@@ -66,11 +68,11 @@
 }
 
 func newTagsForCtx(ctx context.Context) context.Context {
-	t := newTags()
+	t := NewTags()
 	if peer, ok := peer.FromContext(ctx); ok {
 		t.Set("peer.address", peer.Addr.String())
 	}
-	return setInContext(ctx, t)
+	return SetInContext(ctx, t)
 }
 
 func setRequestFieldTags(ctx context.Context, f RequestFieldExtractorFunc, fullMethodName string, req interface{}) {
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/client_interceptors.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/client_interceptors.go
index f8fdecf..2e9cafd 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/client_interceptors.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/client_interceptors.go
@@ -4,6 +4,7 @@
 package grpc_opentracing
 
 import (
+	"context"
 	"io"
 	"sync"
 
@@ -11,7 +12,6 @@
 	opentracing "github.com/opentracing/opentracing-go"
 	"github.com/opentracing/opentracing-go/ext"
 	"github.com/opentracing/opentracing-go/log"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/metadata"
@@ -25,6 +25,9 @@
 			return invoker(parentCtx, method, req, reply, cc, opts...)
 		}
 		newCtx, clientSpan := newClientSpanFromContext(parentCtx, o.tracer, method)
+		if o.unaryRequestHandlerFunc != nil {
+			o.unaryRequestHandlerFunc(clientSpan, req)
+		}
 		err := invoker(newCtx, method, req, reply, cc, opts...)
 		finishClientSpan(clientSpan, err)
 		return err
@@ -76,9 +79,7 @@
 
 func (s *tracedClientStream) CloseSend() error {
 	err := s.ClientStream.CloseSend()
-	if err != nil {
-		s.finishClientSpan(err)
-	}
+	s.finishClientSpan(err)
 	return err
 }
 
@@ -127,7 +128,7 @@
 	// Make sure we add this to the metadata of the call, so it gets propagated:
 	md := metautils.ExtractOutgoing(ctx).Clone()
 	if err := tracer.Inject(clientSpan.Context(), opentracing.HTTPHeaders, metadataTextMap(md)); err != nil {
-		grpclog.Printf("grpc_opentracing: failed serializing trace information: %v", err)
+		grpclog.Infof("grpc_opentracing: failed serializing trace information: %v", err)
 	}
 	ctxWithMetadata := md.ToOutgoing(ctx)
 	return opentracing.ContextWithSpan(ctxWithMetadata, clientSpan), clientSpan
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/id_extract.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/id_extract.go
index d19f3c8..bc7302e 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/id_extract.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/id_extract.go
@@ -23,8 +23,11 @@
 // https://github.com/opentracing/basictracer-go/blob/1b32af207119a14b1b231d451df3ed04a72efebf/propagation_ot.go#L26
 // Jaeger from Uber use one-key schema with next format '{trace-id}:{span-id}:{parent-span-id}:{flags}'
 // https://www.jaegertracing.io/docs/client-libraries/#trace-span-identity
-func injectOpentracingIdsToTags(span opentracing.Span, tags grpc_ctxtags.Tags) {
-	if err := span.Tracer().Inject(span.Context(), opentracing.HTTPHeaders, &tagsCarrier{tags}); err != nil {
+// Datadog uses keys ending with 'trace-id' and 'parent-id' (for span) by default:
+// https://github.com/DataDog/dd-trace-go/blob/v1/ddtrace/tracer/textmap.go#L77
+func injectOpentracingIdsToTags(traceHeaderName string, span opentracing.Span, tags grpc_ctxtags.Tags) {
+	if err := span.Tracer().Inject(span.Context(), opentracing.HTTPHeaders,
+		&tagsCarrier{Tags: tags, traceHeaderName: traceHeaderName}); err != nil {
 		grpclog.Infof("grpc_opentracing: failed extracting trace info into ctx %v", err)
 	}
 }
@@ -32,10 +35,28 @@
 // tagsCarrier is a really hacky way of
 type tagsCarrier struct {
 	grpc_ctxtags.Tags
+	traceHeaderName string
 }
 
 func (t *tagsCarrier) Set(key, val string) {
 	key = strings.ToLower(key)
+
+	if key == t.traceHeaderName {
+		parts := strings.Split(val, ":")
+		if len(parts) == 4 {
+			t.Tags.Set(TagTraceId, parts[0])
+			t.Tags.Set(TagSpanId, parts[1])
+
+			if parts[3] != jaegerNotSampledFlag {
+				t.Tags.Set(TagSampled, "true")
+			} else {
+				t.Tags.Set(TagSampled, "false")
+			}
+
+			return
+		}
+	}
+
 	if strings.Contains(key, "traceid") {
 		t.Tags.Set(TagTraceId, val) // this will most likely be base-16 (hex) encoded
 	}
@@ -51,17 +72,11 @@
 		}
 	}
 
-	if key == "uber-trace-id" {
-		parts := strings.Split(val, ":")
-		if len(parts) == 4 {
-			t.Tags.Set(TagTraceId, parts[0])
-			t.Tags.Set(TagSpanId, parts[1])
+	if strings.HasSuffix(key, "trace-id") {
+		t.Tags.Set(TagTraceId, val)
+	}
 
-			if parts[3] != jaegerNotSampledFlag {
-				t.Tags.Set(TagSampled, "true")
-			} else {
-				t.Tags.Set(TagSampled, "false")
-			}
-		}
+	if strings.HasSuffix(key, "parent-id") {
+		t.Tags.Set(TagSpanId, val)
 	}
 }
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/metadata.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/metadata.go
index 38f251d..3649fb5 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/metadata.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/metadata.go
@@ -7,8 +7,6 @@
 	"encoding/base64"
 	"strings"
 
-	"fmt"
-
 	"google.golang.org/grpc/metadata"
 )
 
@@ -32,12 +30,8 @@
 func (m metadataTextMap) ForeachKey(callback func(key, val string) error) error {
 	for k, vv := range m {
 		for _, v := range vv {
-			if decodedKey, decodedVal, err := metadata.DecodeKeyValue(k, v); err == nil {
-				if err = callback(decodedKey, decodedVal); err != nil {
-					return err
-				}
-			} else {
-				return fmt.Errorf("failed decoding opentracing from gRPC metadata: %v", err)
+			if err := callback(k, v); err != nil {
+				return err
 			}
 		}
 	}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/options.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/options.go
index e75102b..430fe56 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/options.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/options.go
@@ -21,9 +21,18 @@
 // If it returns false, the given request will not be traced.
 type FilterFunc func(ctx context.Context, fullMethodName string) bool
 
+// UnaryRequestHandlerFunc is a custom request handler
+type UnaryRequestHandlerFunc func(span opentracing.Span, req interface{})
+
+// OpNameFunc is a func that allows custom operation names instead of the gRPC method.
+type OpNameFunc func(method string) string
+
 type options struct {
-	filterOutFunc FilterFunc
-	tracer        opentracing.Tracer
+	filterOutFunc           FilterFunc
+	tracer                  opentracing.Tracer
+	traceHeaderName         string
+	unaryRequestHandlerFunc UnaryRequestHandlerFunc
+	opNameFunc              OpNameFunc
 }
 
 func evaluateOptions(opts []Option) *options {
@@ -35,6 +44,9 @@
 	if optCopy.tracer == nil {
 		optCopy.tracer = opentracing.GlobalTracer()
 	}
+	if optCopy.traceHeaderName == "" {
+		optCopy.traceHeaderName = "uber-trace-id"
+	}
 	return optCopy
 }
 
@@ -47,9 +59,31 @@
 	}
 }
 
+// WithTraceHeaderName customizes the trace header name where trace metadata passed with requests.
+// Default one is `uber-trace-id`
+func WithTraceHeaderName(name string) Option {
+	return func(o *options) {
+		o.traceHeaderName = name
+	}
+}
+
 // WithTracer sets a custom tracer to be used for this middleware, otherwise the opentracing.GlobalTracer is used.
 func WithTracer(tracer opentracing.Tracer) Option {
 	return func(o *options) {
 		o.tracer = tracer
 	}
 }
+
+// WithUnaryRequestHandlerFunc sets a custom handler for the request
+func WithUnaryRequestHandlerFunc(f UnaryRequestHandlerFunc) Option {
+	return func(o *options) {
+		o.unaryRequestHandlerFunc = f
+	}
+}
+
+// WithOpName customizes the trace Operation name
+func WithOpName(f OpNameFunc) Option {
+	return func(o *options) {
+		o.opNameFunc = f
+	}
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/server_interceptors.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/server_interceptors.go
index 53764a0..186b108 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/server_interceptors.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/server_interceptors.go
@@ -4,13 +4,14 @@
 package grpc_opentracing
 
 import (
+	"context"
+
 	"github.com/grpc-ecosystem/go-grpc-middleware"
 	"github.com/grpc-ecosystem/go-grpc-middleware/tags"
 	"github.com/grpc-ecosystem/go-grpc-middleware/util/metautils"
 	"github.com/opentracing/opentracing-go"
 	"github.com/opentracing/opentracing-go/ext"
 	"github.com/opentracing/opentracing-go/log"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/grpclog"
 )
@@ -26,7 +27,14 @@
 		if o.filterOutFunc != nil && !o.filterOutFunc(ctx, info.FullMethod) {
 			return handler(ctx, req)
 		}
-		newCtx, serverSpan := newServerSpanFromInbound(ctx, o.tracer, info.FullMethod)
+		opName := info.FullMethod
+		if o.opNameFunc != nil {
+			opName = o.opNameFunc(info.FullMethod)
+		}
+		newCtx, serverSpan := newServerSpanFromInbound(ctx, o.tracer, o.traceHeaderName, opName)
+		if o.unaryRequestHandlerFunc != nil {
+			o.unaryRequestHandlerFunc(serverSpan, req)
+		}
 		resp, err := handler(newCtx, req)
 		finishServerSpan(ctx, serverSpan, err)
 		return resp, err
@@ -40,7 +48,11 @@
 		if o.filterOutFunc != nil && !o.filterOutFunc(stream.Context(), info.FullMethod) {
 			return handler(srv, stream)
 		}
-		newCtx, serverSpan := newServerSpanFromInbound(stream.Context(), o.tracer, info.FullMethod)
+		opName := info.FullMethod
+		if o.opNameFunc != nil {
+			opName = o.opNameFunc(info.FullMethod)
+		}
+		newCtx, serverSpan := newServerSpanFromInbound(stream.Context(), o.tracer, o.traceHeaderName, opName)
 		wrappedStream := grpc_middleware.WrapServerStream(stream)
 		wrappedStream.WrappedContext = newCtx
 		err := handler(srv, wrappedStream)
@@ -49,21 +61,21 @@
 	}
 }
 
-func newServerSpanFromInbound(ctx context.Context, tracer opentracing.Tracer, fullMethodName string) (context.Context, opentracing.Span) {
+func newServerSpanFromInbound(ctx context.Context, tracer opentracing.Tracer, traceHeaderName, opName string) (context.Context, opentracing.Span) {
 	md := metautils.ExtractIncoming(ctx)
 	parentSpanContext, err := tracer.Extract(opentracing.HTTPHeaders, metadataTextMap(md))
 	if err != nil && err != opentracing.ErrSpanContextNotFound {
-		grpclog.Printf("grpc_opentracing: failed parsing trace information: %v", err)
+		grpclog.Infof("grpc_opentracing: failed parsing trace information: %v", err)
 	}
 
 	serverSpan := tracer.StartSpan(
-		fullMethodName,
+		opName,
 		// this is magical, it attaches the new span to the parent parentSpanContext, and creates an unparented one if empty.
 		ext.RPCServerOption(parentSpanContext),
 		grpcTag,
 	)
 
-	injectOpentracingIdsToTags(serverSpan, grpc_ctxtags.Extract(ctx))
+	injectOpentracingIdsToTags(traceHeaderName, serverSpan, grpc_ctxtags.Extract(ctx))
 	return opentracing.ContextWithSpan(ctx, serverSpan), serverSpan
 }
 
@@ -74,7 +86,6 @@
 		// Don't tag errors, log them instead.
 		if vErr, ok := v.(error); ok {
 			serverSpan.LogKV(k, vErr.Error())
-
 		} else {
 			serverSpan.SetTag(k, v)
 		}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/nicemd.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/nicemd.go
index a277bee..1c60585 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/nicemd.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/nicemd.go
@@ -4,9 +4,9 @@
 package metautils
 
 import (
+	"context"
 	"strings"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc/metadata"
 )
 
@@ -49,7 +49,7 @@
 			found = true
 		} else {
 			for _, allowedKey := range copiedKeys {
-				if strings.ToLower(allowedKey) == strings.ToLower(k) {
+				if strings.EqualFold(allowedKey, k) {
 					found = true
 					break
 				}
@@ -83,7 +83,7 @@
 //
 // The function is binary-key safe.
 func (m NiceMD) Get(key string) string {
-	k, _ := encodeKeyValue(key, "")
+	k := strings.ToLower(key)
 	vv, ok := m[k]
 	if !ok {
 		return ""
@@ -98,7 +98,7 @@
 // The function is binary-key safe.
 
 func (m NiceMD) Del(key string) NiceMD {
-	k, _ := encodeKeyValue(key, "")
+	k := strings.ToLower(key)
 	delete(m, k)
 	return m
 }
@@ -109,8 +109,8 @@
 //
 // The function is binary-key safe.
 func (m NiceMD) Set(key string, value string) NiceMD {
-	k, v := encodeKeyValue(key, value)
-	m[k] = []string{v}
+	k := strings.ToLower(key)
+	m[k] = []string{value}
 	return m
 }
 
@@ -120,7 +120,7 @@
 //
 // The function is binary-key safe.
 func (m NiceMD) Add(key string, value string) NiceMD {
-	k, v := encodeKeyValue(key, value)
-	m[k] = append(m[k], v)
+	k := strings.ToLower(key)
+	m[k] = append(m[k], value)
 	return m
 }
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/single_key.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/single_key.go
deleted file mode 100644
index 8a53871..0000000
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/single_key.go
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2016 Michal Witkowski. All Rights Reserved.
-// See LICENSE for licensing terms.
-
-package metautils
-
-import (
-	"encoding/base64"
-	"strings"
-)
-
-const (
-	binHdrSuffix = "-bin"
-)
-
-func encodeKeyValue(k, v string) (string, string) {
-	k = strings.ToLower(k)
-	if strings.HasSuffix(k, binHdrSuffix) {
-		val := base64.StdEncoding.EncodeToString([]byte(v))
-		v = string(val)
-	}
-	return k, v
-}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
index 597b862..05ccfb3 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
@@ -4,7 +4,8 @@
 package grpc_middleware
 
 import (
-	"golang.org/x/net/context"
+	"context"
+
 	"google.golang.org/grpc"
 )