From dcad72ed2556acd16eb8f5c03c6a25bee38e64ea Mon Sep 17 00:00:00 2001
From: Larry Ruane <larry@electriccoin.co>
Date: Wed, 7 Apr 2021 15:04:56 -0600
Subject: [PATCH] generalize GetAddressUtxos to accept taddr list

---
 common/common.go                              |   4 +
 frontend/service.go                           |  12 +-
 go.mod                                        |   2 +-
 go.sum                                        |   4 +-
 .../grpc/balancer/balancer.go                 |  10 +
 .../grpc/balancer/base/balancer.go            |  29 ++-
 .../grpc/balancer_conn_wrappers.go            |   8 +
 vendor/google.golang.org/grpc/go.mod          |   2 +-
 vendor/google.golang.org/grpc/go.sum          |   4 +-
 .../grpc/internal/resolver/config_selector.go |  69 ++++++
 .../grpc/internal/transport/http2_client.go   |   4 +
 .../grpc/internal/transport/http2_server.go   |  15 ++
 .../grpc/internal/transport/http_util.go      |   3 +
 .../grpc/internal/transport/transport.go      |   3 +
 vendor/google.golang.org/grpc/pickfirst.go    |   2 +-
 vendor/google.golang.org/grpc/stream.go       |  30 ++-
 vendor/google.golang.org/grpc/version.go      |   2 +-
 vendor/google.golang.org/grpc/vet.sh          |  21 +-
 vendor/modules.txt                            |   2 +-
 walletrpc/service.pb.go                       | 231 +++++++++---------
 walletrpc/service.proto                       |   5 +-
 21 files changed, 317 insertions(+), 145 deletions(-)

diff --git a/common/common.go b/common/common.go
index 23e8ae6..2299a12 100644
--- a/common/common.go
+++ b/common/common.go
@@ -122,7 +122,11 @@ type (
 	}
 
 	// zcashd rpc "getaddressutxos"
+	ZcashdRpcRequestGetaddressutxos struct {
+		Addresses []string `json:"addresses"`
+	}
 	ZcashdRpcReplyGetaddressutxos []struct {
+		Address     string
 		Txid        string
 		OutputIndex int64
 		Script      string
diff --git a/frontend/service.go b/frontend/service.go
index 3eb3260..c42727e 100644
--- a/frontend/service.go
+++ b/frontend/service.go
@@ -509,11 +509,16 @@ func MempoolFilter(items, exclude []string) []string {
 }
 
 func getAddressUtxos(arg *walletrpc.GetAddressUtxosArg, f func(*walletrpc.GetAddressUtxosReply) error) error {
-	if err := checkTaddress(arg.Address); err != nil {
-		return err
+	for _, a := range arg.Addresses {
+		if err := checkTaddress(a); err != nil {
+			return err
+		}
 	}
 	params := make([]json.RawMessage, 1)
-	param, err := json.Marshal(arg.Address)
+	addrList := &common.ZcashdRpcRequestGetaddressutxos{
+		Addresses: arg.Addresses,
+	}
+	param, err := json.Marshal(addrList)
 	if err != nil {
 		return err
 	}
@@ -545,6 +550,7 @@ func getAddressUtxos(arg *walletrpc.GetAddressUtxosArg, f func(*walletrpc.GetAdd
 			return err
 		}
 		err = f(&walletrpc.GetAddressUtxosReply{
+			Address:  utxo.Address,
 			Txid:     parser.Reverse(txidBytes),
 			Index:    int32(utxo.OutputIndex),
 			Script:   scriptBytes,
diff --git a/go.mod b/go.mod
index 68048aa..7aa63b2 100644
--- a/go.mod
+++ b/go.mod
@@ -23,7 +23,7 @@ require (
 	golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57 // indirect
 	golang.org/x/text v0.3.6 // indirect
 	google.golang.org/genproto v0.0.0-20210406143921-e86de6bf7a46 // indirect
-	google.golang.org/grpc v1.36.1
+	google.golang.org/grpc v1.37.0
 	google.golang.org/protobuf v1.26.0
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/ini.v1 v1.51.0
diff --git a/go.sum b/go.sum
index 0d8f94e..7b13508 100644
--- a/go.sum
+++ b/go.sum
@@ -48,6 +48,7 @@ github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
@@ -305,8 +306,9 @@ google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ij
 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 v1.36.1 h1:cmUfbeGKnz9+2DD/UYsMQXeqbHZqZDs4eQwW0sFOpBY=
 google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.37.0 h1:uSZWeQJX5j11bIQ4AJoj+McDBo29cY1MCoC1wO3ts+c=
+google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
diff --git a/vendor/google.golang.org/grpc/balancer/balancer.go b/vendor/google.golang.org/grpc/balancer/balancer.go
index 788759b..ab531f4 100644
--- a/vendor/google.golang.org/grpc/balancer/balancer.go
+++ b/vendor/google.golang.org/grpc/balancer/balancer.go
@@ -101,6 +101,9 @@ type SubConn interface {
 	// a new connection will be created.
 	//
 	// This will trigger a state transition for the SubConn.
+	//
+	// Deprecated: This method is now part of the ClientConn interface and will
+	// eventually be removed from here.
 	UpdateAddresses([]resolver.Address)
 	// Connect starts the connecting for this SubConn.
 	Connect()
@@ -143,6 +146,13 @@ type ClientConn interface {
 	// RemoveSubConn removes the SubConn from ClientConn.
 	// The SubConn will be shutdown.
 	RemoveSubConn(SubConn)
+	// UpdateAddresses updates the addresses used in the passed in SubConn.
+	// gRPC checks if the currently connected address is still in the new list.
+	// If so, the connection will be kept. Else, the connection will be
+	// gracefully closed, and a new connection will be created.
+	//
+	// This will trigger a state transition for the SubConn.
+	UpdateAddresses(SubConn, []resolver.Address)
 
 	// UpdateState notifies gRPC that the balancer's internal state has
 	// changed.
diff --git a/vendor/google.golang.org/grpc/balancer/base/balancer.go b/vendor/google.golang.org/grpc/balancer/base/balancer.go
index e0d3428..c883efa 100644
--- a/vendor/google.golang.org/grpc/balancer/base/balancer.go
+++ b/vendor/google.golang.org/grpc/balancer/base/balancer.go
@@ -22,6 +22,7 @@ import (
 	"errors"
 	"fmt"
 
+	"google.golang.org/grpc/attributes"
 	"google.golang.org/grpc/balancer"
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/grpclog"
@@ -41,7 +42,7 @@ func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions)
 		cc:            cc,
 		pickerBuilder: bb.pickerBuilder,
 
-		subConns: make(map[resolver.Address]balancer.SubConn),
+		subConns: make(map[resolver.Address]subConnInfo),
 		scStates: make(map[balancer.SubConn]connectivity.State),
 		csEvltr:  &balancer.ConnectivityStateEvaluator{},
 		config:   bb.config,
@@ -57,6 +58,11 @@ func (bb *baseBuilder) Name() string {
 	return bb.name
 }
 
+type subConnInfo struct {
+	subConn balancer.SubConn
+	attrs   *attributes.Attributes
+}
+
 type baseBalancer struct {
 	cc            balancer.ClientConn
 	pickerBuilder PickerBuilder
@@ -64,7 +70,7 @@ type baseBalancer struct {
 	csEvltr *balancer.ConnectivityStateEvaluator
 	state   connectivity.State
 
-	subConns map[resolver.Address]balancer.SubConn // `attributes` is stripped from the keys of this map (the addresses)
+	subConns map[resolver.Address]subConnInfo // `attributes` is stripped from the keys of this map (the addresses)
 	scStates map[balancer.SubConn]connectivity.State
 	picker   balancer.Picker
 	config   Config
@@ -114,7 +120,7 @@ func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
 		aNoAttrs := a
 		aNoAttrs.Attributes = nil
 		addrsSet[aNoAttrs] = struct{}{}
-		if sc, ok := b.subConns[aNoAttrs]; !ok {
+		if scInfo, ok := b.subConns[aNoAttrs]; !ok {
 			// a is a new address (not existing in b.subConns).
 			//
 			// When creating SubConn, the original address with attributes is
@@ -125,7 +131,7 @@ func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
 				logger.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
 				continue
 			}
-			b.subConns[aNoAttrs] = sc
+			b.subConns[aNoAttrs] = subConnInfo{subConn: sc, attrs: a.Attributes}
 			b.scStates[sc] = connectivity.Idle
 			sc.Connect()
 		} else {
@@ -135,13 +141,15 @@ func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
 			// The SubConn does a reflect.DeepEqual of the new and old
 			// addresses. So this is a noop if the current address is the same
 			// as the old one (including attributes).
-			sc.UpdateAddresses([]resolver.Address{a})
+			scInfo.attrs = a.Attributes
+			b.subConns[aNoAttrs] = scInfo
+			b.cc.UpdateAddresses(scInfo.subConn, []resolver.Address{a})
 		}
 	}
-	for a, sc := range b.subConns {
+	for a, scInfo := range b.subConns {
 		// a was removed by resolver.
 		if _, ok := addrsSet[a]; !ok {
-			b.cc.RemoveSubConn(sc)
+			b.cc.RemoveSubConn(scInfo.subConn)
 			delete(b.subConns, a)
 			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
 			// The entry will be deleted in UpdateSubConnState.
@@ -184,9 +192,10 @@ func (b *baseBalancer) regeneratePicker() {
 	readySCs := make(map[balancer.SubConn]SubConnInfo)
 
 	// Filter out all ready SCs from full subConn map.
-	for addr, sc := range b.subConns {
-		if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
-			readySCs[sc] = SubConnInfo{Address: addr}
+	for addr, scInfo := range b.subConns {
+		if st, ok := b.scStates[scInfo.subConn]; ok && st == connectivity.Ready {
+			addr.Attributes = scInfo.attrs
+			readySCs[scInfo.subConn] = SubConnInfo{Address: addr}
 		}
 	}
 	b.picker = b.pickerBuilder.Build(PickerBuildInfo{ReadySCs: readySCs})
diff --git a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
index 11e592a..41061d6 100644
--- a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
+++ b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
@@ -163,6 +163,14 @@ func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
 	ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
 }
 
+func (ccb *ccBalancerWrapper) UpdateAddresses(sc balancer.SubConn, addrs []resolver.Address) {
+	acbw, ok := sc.(*acBalancerWrapper)
+	if !ok {
+		return
+	}
+	acbw.UpdateAddresses(addrs)
+}
+
 func (ccb *ccBalancerWrapper) UpdateState(s balancer.State) {
 	ccb.mu.Lock()
 	defer ccb.mu.Unlock()
diff --git a/vendor/google.golang.org/grpc/go.mod b/vendor/google.golang.org/grpc/go.mod
index cab74e5..b177cfa 100644
--- a/vendor/google.golang.org/grpc/go.mod
+++ b/vendor/google.golang.org/grpc/go.mod
@@ -4,7 +4,7 @@ go 1.11
 
 require (
 	github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403
-	github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad
+	github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/golang/protobuf v1.4.2
 	github.com/google/go-cmp v0.5.0
diff --git a/vendor/google.golang.org/grpc/go.sum b/vendor/google.golang.org/grpc/go.sum
index 77ee70b..bb25cd4 100644
--- a/vendor/google.golang.org/grpc/go.sum
+++ b/vendor/google.golang.org/grpc/go.sum
@@ -12,8 +12,8 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad h1:EmNYJhPYy0pOFjCx2PrgtaBXmee0iUX9hLlxE1xHOJE=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d h1:QyzYnTnPE15SQyUeqU6qLbWxMkwyAyu+vGksa0b7j00=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0 h1:EQciDnbrYxy13PgWoY8AqoxGiPrpgBZ1R8UNe3ddc+A=
 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=
diff --git a/vendor/google.golang.org/grpc/internal/resolver/config_selector.go b/vendor/google.golang.org/grpc/internal/resolver/config_selector.go
index e699004..5e7f367 100644
--- a/vendor/google.golang.org/grpc/internal/resolver/config_selector.go
+++ b/vendor/google.golang.org/grpc/internal/resolver/config_selector.go
@@ -24,6 +24,7 @@ import (
 	"sync"
 
 	"google.golang.org/grpc/internal/serviceconfig"
+	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/resolver"
 )
 
@@ -51,6 +52,74 @@ type RPCConfig struct {
 	Context      context.Context
 	MethodConfig serviceconfig.MethodConfig // configuration to use for this RPC
 	OnCommitted  func()                     // Called when the RPC has been committed (retries no longer possible)
+	Interceptor  ClientInterceptor
+}
+
+// ClientStream is the same as grpc.ClientStream, but defined here for circular
+// dependency reasons.
+type ClientStream interface {
+	// Header returns the header metadata received from the server if there
+	// is any. It blocks if the metadata is not ready to read.
+	Header() (metadata.MD, error)
+	// Trailer returns the trailer metadata from the server, if there is any.
+	// It must only be called after stream.CloseAndRecv has returned, or
+	// stream.Recv has returned a non-nil error (including io.EOF).
+	Trailer() metadata.MD
+	// CloseSend closes the send direction of the stream. It closes the stream
+	// when non-nil error is met. It is also not safe to call CloseSend
+	// concurrently with SendMsg.
+	CloseSend() error
+	// Context returns the context for this stream.
+	//
+	// It should not be called until after Header or RecvMsg has returned. Once
+	// called, subsequent client-side retries are disabled.
+	Context() context.Context
+	// SendMsg is generally called by generated code. On error, SendMsg aborts
+	// the stream. If the error was generated by the client, the status is
+	// returned directly; otherwise, io.EOF is returned and the status of
+	// the stream may be discovered using RecvMsg.
+	//
+	// SendMsg blocks until:
+	//   - There is sufficient flow control to schedule m with the transport, or
+	//   - The stream is done, or
+	//   - The stream breaks.
+	//
+	// SendMsg does not wait until the message is received by the server. An
+	// untimely stream closure may result in lost messages. To ensure delivery,
+	// users should ensure the RPC completed successfully using RecvMsg.
+	//
+	// It is safe to have a goroutine calling SendMsg and another goroutine
+	// calling RecvMsg on the same stream at the same time, but it is not safe
+	// to call SendMsg on the same stream in different goroutines. It is also
+	// not safe to call CloseSend concurrently with SendMsg.
+	SendMsg(m interface{}) error
+	// RecvMsg blocks until it receives a message into m or the stream is
+	// done. It returns io.EOF when the stream completes successfully. On
+	// any other error, the stream is aborted and the error contains the RPC
+	// status.
+	//
+	// It is safe to have a goroutine calling SendMsg and another goroutine
+	// calling RecvMsg on the same stream at the same time, but it is not
+	// safe to call RecvMsg on the same stream in different goroutines.
+	RecvMsg(m interface{}) error
+}
+
+// ClientInterceptor is an interceptor for gRPC client streams.
+type ClientInterceptor interface {
+	// NewStream produces a ClientStream for an RPC which may optionally use
+	// the provided function to produce a stream for delegation.  Note:
+	// RPCInfo.Context should not be used (will be nil).
+	//
+	// done is invoked when the RPC is finished using its connection, or could
+	// not be assigned a connection.  RPC operations may still occur on
+	// ClientStream after done is called, since the interceptor is invoked by
+	// application-layer operations.  done must never be nil when called.
+	NewStream(ctx context.Context, ri RPCInfo, done func(), newStream func(ctx context.Context, done func()) (ClientStream, error)) (ClientStream, error)
+}
+
+// ServerInterceptor is unimplementable; do not use.
+type ServerInterceptor interface {
+	notDefined()
 }
 
 type csKeyType string
diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_client.go b/vendor/google.golang.org/grpc/internal/transport/http2_client.go
index 8902b7f..d5bbe72 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http2_client.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http2_client.go
@@ -414,6 +414,7 @@ func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
 		buf:            newRecvBuffer(),
 		headerChan:     make(chan struct{}),
 		contentSubtype: callHdr.ContentSubtype,
+		doneFunc:       callHdr.DoneFunc,
 	}
 	s.wq = newWriteQuota(defaultWriteQuota, s.done)
 	s.requestRead = func(n int) {
@@ -832,6 +833,9 @@ func (t *http2Client) closeStream(s *Stream, err error, rst bool, rstCode http2.
 	t.controlBuf.executeAndPut(addBackStreamQuota, cleanup)
 	// This will unblock write.
 	close(s.done)
+	if s.doneFunc != nil {
+		s.doneFunc()
+	}
 }
 
 // Close kicks off the shutdown process of the transport. This should be called
diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_server.go b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
index 0cf1cc3..7c6c89d 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http2_server.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
@@ -26,6 +26,7 @@ import (
 	"io"
 	"math"
 	"net"
+	"net/http"
 	"strconv"
 	"sync"
 	"sync/atomic"
@@ -402,6 +403,20 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 		return true
 	}
 	t.maxStreamID = streamID
+	if state.data.httpMethod != http.MethodPost {
+		t.mu.Unlock()
+		if logger.V(logLevel) {
+			logger.Warningf("transport: http2Server.operateHeaders parsed a :method field: %v which should be POST", state.data.httpMethod)
+		}
+		t.controlBuf.put(&cleanupStream{
+			streamID: streamID,
+			rst:      true,
+			rstCode:  http2.ErrCodeProtocol,
+			onWrite:  func() {},
+		})
+		s.cancel()
+		return false
+	}
 	t.activeStreams[streamID] = s
 	if len(t.activeStreams) == 1 {
 		t.idle = time.Time{}
diff --git a/vendor/google.golang.org/grpc/internal/transport/http_util.go b/vendor/google.golang.org/grpc/internal/transport/http_util.go
index 7e41d11..c7dee14 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http_util.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http_util.go
@@ -111,6 +111,7 @@ type parsedHeaderData struct {
 	timeoutSet bool
 	timeout    time.Duration
 	method     string
+	httpMethod string
 	// key-value metadata map from the peer.
 	mdata          map[string][]string
 	statsTags      []byte
@@ -363,6 +364,8 @@ func (d *decodeState) processHeaderField(f hpack.HeaderField) {
 		}
 		d.data.statsTrace = v
 		d.addMetadata(f.Name, string(v))
+	case ":method":
+		d.data.httpMethod = f.Value
 	default:
 		if isReservedHeader(f.Name) && !isWhitelistedHeader(f.Name) {
 			break
diff --git a/vendor/google.golang.org/grpc/internal/transport/transport.go b/vendor/google.golang.org/grpc/internal/transport/transport.go
index 9c8f79c..5cf7c5f 100644
--- a/vendor/google.golang.org/grpc/internal/transport/transport.go
+++ b/vendor/google.golang.org/grpc/internal/transport/transport.go
@@ -241,6 +241,7 @@ type Stream struct {
 	ctx          context.Context    // the associated context of the stream
 	cancel       context.CancelFunc // always nil for client side Stream
 	done         chan struct{}      // closed at the end of stream to unblock writers. On the client side.
+	doneFunc     func()             // invoked at the end of stream on client side.
 	ctxDone      <-chan struct{}    // same as done chan but for server side. Cache of ctx.Done() (for performance)
 	method       string             // the associated RPC method of the stream
 	recvCompress string
@@ -611,6 +612,8 @@ type CallHdr struct {
 	ContentSubtype string
 
 	PreviousAttempts int // value of grpc-previous-rpc-attempts header to set
+
+	DoneFunc func() // called when the stream is finished
 }
 
 // ClientTransport is the common interface for all gRPC client-side transport
diff --git a/vendor/google.golang.org/grpc/pickfirst.go b/vendor/google.golang.org/grpc/pickfirst.go
index 56e33f6..b858c2a 100644
--- a/vendor/google.golang.org/grpc/pickfirst.go
+++ b/vendor/google.golang.org/grpc/pickfirst.go
@@ -84,7 +84,7 @@ func (b *pickfirstBalancer) UpdateClientConnState(cs balancer.ClientConnState) e
 		b.cc.UpdateState(balancer.State{ConnectivityState: connectivity.Idle, Picker: &picker{result: balancer.PickResult{SubConn: b.sc}}})
 		b.sc.Connect()
 	} else {
-		b.sc.UpdateAddresses(cs.ResolverState.Addresses)
+		b.cc.UpdateAddresses(b.sc, cs.ResolverState.Addresses)
 		b.sc.Connect()
 	}
 	return nil
diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go
index eda1248..77d2574 100644
--- a/vendor/google.golang.org/grpc/stream.go
+++ b/vendor/google.golang.org/grpc/stream.go
@@ -166,7 +166,6 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 			}
 		}()
 	}
-	c := defaultCallInfo()
 	// Provide an opportunity for the first RPC to see the first service config
 	// provided by the resolver.
 	if err := cc.waitForResolvedAddrs(ctx); err != nil {
@@ -175,18 +174,40 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 
 	var mc serviceconfig.MethodConfig
 	var onCommit func()
-	rpcConfig, err := cc.safeConfigSelector.SelectConfig(iresolver.RPCInfo{Context: ctx, Method: method})
-	if err != nil {
-		return nil, status.Convert(err).Err()
+	var newStream = func(ctx context.Context, done func()) (iresolver.ClientStream, error) {
+		return newClientStreamWithParams(ctx, desc, cc, method, mc, onCommit, done, opts...)
 	}
+
+	rpcInfo := iresolver.RPCInfo{Context: ctx, Method: method}
+	rpcConfig, err := cc.safeConfigSelector.SelectConfig(rpcInfo)
+	if err != nil {
+		return nil, toRPCErr(err)
+	}
+
 	if rpcConfig != nil {
 		if rpcConfig.Context != nil {
 			ctx = rpcConfig.Context
 		}
 		mc = rpcConfig.MethodConfig
 		onCommit = rpcConfig.OnCommitted
+		if rpcConfig.Interceptor != nil {
+			rpcInfo.Context = nil
+			ns := newStream
+			newStream = func(ctx context.Context, done func()) (iresolver.ClientStream, error) {
+				cs, err := rpcConfig.Interceptor.NewStream(ctx, rpcInfo, done, ns)
+				if err != nil {
+					return nil, toRPCErr(err)
+				}
+				return cs, nil
+			}
+		}
 	}
 
+	return newStream(ctx, func() {})
+}
+
+func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, mc serviceconfig.MethodConfig, onCommit, doneFunc func(), opts ...CallOption) (_ iresolver.ClientStream, err error) {
+	c := defaultCallInfo()
 	if mc.WaitForReady != nil {
 		c.failFast = !*mc.WaitForReady
 	}
@@ -223,6 +244,7 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		Host:           cc.authority,
 		Method:         method,
 		ContentSubtype: c.contentSubtype,
+		DoneFunc:       doneFunc,
 	}
 
 	// Set our outgoing compression according to the UseCompressor CallOption, if
diff --git a/vendor/google.golang.org/grpc/version.go b/vendor/google.golang.org/grpc/version.go
index 1051b7e..c3b87eb 100644
--- a/vendor/google.golang.org/grpc/version.go
+++ b/vendor/google.golang.org/grpc/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.36.1"
+const Version = "1.37.0"
diff --git a/vendor/google.golang.org/grpc/vet.sh b/vendor/google.golang.org/grpc/vet.sh
index b41df6d..dcd939b 100644
--- a/vendor/google.golang.org/grpc/vet.sh
+++ b/vendor/google.golang.org/grpc/vet.sh
@@ -28,7 +28,8 @@ cleanup() {
 }
 trap cleanup EXIT
 
-PATH="${GOPATH}/bin:${GOROOT}/bin:${PATH}"
+PATH="${HOME}/go/bin:${GOROOT}/bin:${PATH}"
+go version
 
 if [[ "$1" = "-install" ]]; then
   # Check for module support
@@ -107,7 +108,7 @@ go list -f {{.Dir}} ./... | xargs go run test/go_vet/vet.go
 # - gofmt, goimports, golint (with exceptions for generated code), go vet.
 gofmt -s -d -l . 2>&1 | fail_on_output
 goimports -l . 2>&1 | not grep -vE "\.pb\.go"
-golint ./... 2>&1 | not grep -vE "\.pb\.go:"
+golint ./... 2>&1 | not grep -vE "/testv3\.pb\.go:"
 go vet -all ./...
 
 misspell -error .
@@ -141,8 +142,11 @@ not grep -Fv '.CredsBundle
 .NewAddress
 .NewServiceConfig
 .Type is deprecated: use Attributes
+BuildVersion is deprecated
 balancer.ErrTransientFailure
 balancer.Picker
+extDesc.Filename is deprecated
+github.com/golang/protobuf/jsonpb is deprecated
 grpc.CallCustomCodec
 grpc.Code
 grpc.Compressor
@@ -164,13 +168,7 @@ grpc.WithServiceConfig
 grpc.WithTimeout
 http.CloseNotifier
 info.SecurityVersion
-resolver.Backend
-resolver.GRPCLB
-extDesc.Filename is deprecated
-BuildVersion is deprecated
-github.com/golang/protobuf/jsonpb is deprecated
 proto is deprecated
-xxx_messageInfo_
 proto.InternalMessageInfo is deprecated
 proto.EnumName is deprecated
 proto.ErrInternalBadWireType is deprecated
@@ -184,7 +182,12 @@ proto.RegisterExtension is deprecated
 proto.RegisteredExtension is deprecated
 proto.RegisteredExtensions is deprecated
 proto.RegisterMapType is deprecated
-proto.Unmarshaler is deprecated' "${SC_OUT}"
+proto.Unmarshaler is deprecated
+resolver.Backend
+resolver.GRPCLB
+Target is deprecated: Use the Target field in the BuildOptions instead.
+xxx_messageInfo_
+' "${SC_OUT}"
 
 # - special golint on package comments.
 lint_package_comment_per_package() {
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 976f499..b4e4088 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -109,7 +109,7 @@ golang.org/x/text/unicode/bidi
 golang.org/x/text/unicode/norm
 # google.golang.org/genproto v0.0.0-20210406143921-e86de6bf7a46
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.36.1
+# google.golang.org/grpc v1.37.0
 google.golang.org/grpc
 google.golang.org/grpc/attributes
 google.golang.org/grpc/backoff
diff --git a/walletrpc/service.pb.go b/walletrpc/service.pb.go
index bc464fe..4b13421 100644
--- a/walletrpc/service.pb.go
+++ b/walletrpc/service.pb.go
@@ -983,14 +983,16 @@ func (x *TreeState) GetTree() string {
 	return ""
 }
 
+// Results are sorted by height, which makes it easy to issue another
+// request that picks up from where the previous left off.
 type GetAddressUtxosArg struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Address     string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
-	StartHeight uint64 `protobuf:"varint,2,opt,name=startHeight,proto3" json:"startHeight,omitempty"`
-	MaxEntries  uint32 `protobuf:"varint,3,opt,name=maxEntries,proto3" json:"maxEntries,omitempty"` // zero means unlimited
+	Addresses   []string `protobuf:"bytes,1,rep,name=addresses,proto3" json:"addresses,omitempty"`
+	StartHeight uint64   `protobuf:"varint,2,opt,name=startHeight,proto3" json:"startHeight,omitempty"`
+	MaxEntries  uint32   `protobuf:"varint,3,opt,name=maxEntries,proto3" json:"maxEntries,omitempty"` // zero means unlimited
 }
 
 func (x *GetAddressUtxosArg) Reset() {
@@ -1025,11 +1027,11 @@ func (*GetAddressUtxosArg) Descriptor() ([]byte, []int) {
 	return file_service_proto_rawDescGZIP(), []int{16}
 }
 
-func (x *GetAddressUtxosArg) GetAddress() string {
+func (x *GetAddressUtxosArg) GetAddresses() []string {
 	if x != nil {
-		return x.Address
+		return x.Addresses
 	}
-	return ""
+	return nil
 }
 
 func (x *GetAddressUtxosArg) GetStartHeight() uint64 {
@@ -1051,6 +1053,7 @@ type GetAddressUtxosReply struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
+	Address  string `protobuf:"bytes,6,opt,name=address,proto3" json:"address,omitempty"`
 	Txid     []byte `protobuf:"bytes,1,opt,name=txid,proto3" json:"txid,omitempty"`
 	Index    int32  `protobuf:"varint,2,opt,name=index,proto3" json:"index,omitempty"`
 	Script   []byte `protobuf:"bytes,3,opt,name=script,proto3" json:"script,omitempty"`
@@ -1090,6 +1093,13 @@ func (*GetAddressUtxosReply) Descriptor() ([]byte, []int) {
 	return file_service_proto_rawDescGZIP(), []int{17}
 }
 
+func (x *GetAddressUtxosReply) GetAddress() string {
+	if x != nil {
+		return x.Address
+	}
+	return ""
+}
+
 func (x *GetAddressUtxosReply) GetTxid() []byte {
 	if x != nil {
 		return x.Txid
@@ -1269,116 +1279,117 @@ var file_service_proto_rawDesc = []byte{
 	0x28, 0x09, 0x52, 0x04, 0x68, 0x61, 0x73, 0x68, 0x12, 0x12, 0x0a, 0x04, 0x74, 0x69, 0x6d, 0x65,
 	0x18, 0x04, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x04, 0x74, 0x69, 0x6d, 0x65, 0x12, 0x12, 0x0a, 0x04,
 	0x74, 0x72, 0x65, 0x65, 0x18, 0x05, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x74, 0x72, 0x65, 0x65,
-	0x22, 0x70, 0x0a, 0x12, 0x47, 0x65, 0x74, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x55, 0x74,
-	0x78, 0x6f, 0x73, 0x41, 0x72, 0x67, 0x12, 0x18, 0x0a, 0x07, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73,
-	0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73,
-	0x12, 0x20, 0x0a, 0x0b, 0x73, 0x74, 0x61, 0x72, 0x74, 0x48, 0x65, 0x69, 0x67, 0x68, 0x74, 0x18,
-	0x02, 0x20, 0x01, 0x28, 0x04, 0x52, 0x0b, 0x73, 0x74, 0x61, 0x72, 0x74, 0x48, 0x65, 0x69, 0x67,
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 }
 
 var (
diff --git a/walletrpc/service.proto b/walletrpc/service.proto
index f3aaa4a..8021e3f 100644
--- a/walletrpc/service.proto
+++ b/walletrpc/service.proto
@@ -116,12 +116,15 @@ message TreeState {
     string tree = 5;    // sapling commitment tree state
 }
 
+// Results are sorted by height, which makes it easy to issue another
+// request that picks up from where the previous left off.
 message GetAddressUtxosArg {
-    string address = 1;
+    repeated string addresses = 1;
     uint64 startHeight = 2;
     uint32 maxEntries = 3; // zero means unlimited
 }
 message GetAddressUtxosReply {
+    string address = 6;
     bytes txid = 1;
     int32 index = 2;
     bytes script = 3;