mod+cmd/lncli: use google.golang.org/protobuf package

lnrpc/rpc_utils.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/lightningnetwork/lnd/lnwallet"
+	"google.golang.org/protobuf/encoding/protojson"
 )
 
 const (
@@ -16,6 +17,47 @@ const (
 	RegisterRPCMiddlewareURI = "/lnrpc.Lightning/RegisterRPCMiddleware"
 )
 
+var (
+	// ProtoJSONMarshalOpts is a struct that holds the default marshal
+	// options for marshaling protobuf messages into JSON in a
+	// human-readable way. This should only be used in the CLI and in
+	// integration tests.
+	//
+	// TODO(guggero): Use custom fork of this library to support hex
+	// encoding byte slices instead of the default base64 encoding.
+	ProtoJSONMarshalOpts = &protojson.MarshalOptions{
+		EmitUnpopulated: true,
+		UseProtoNames:   true,
+		Indent:          "    ",
+	}
+
+	// ProtoJSONUnmarshalOpts is a struct that holds the default unmarshal
+	// options for un-marshaling lncli JSON into protobuf messages. This
+	// should only be used in the CLI and in integration tests.
+	//
+	// TODO(guggero): Use custom fork of this library to support hex
+	// encoding byte slices instead of the default base64 encoding.
+	ProtoJSONUnmarshalOpts = &protojson.UnmarshalOptions{
+		AllowPartial: false,
+	}
+
+	// RESTJsonMarshalOpts is a struct that holds the default marshal
+	// options for marshaling protobuf messages into REST JSON in a
+	// human-readable way. This should be used when interacting with the
+	// REST proxy only.
+	RESTJsonMarshalOpts = &protojson.MarshalOptions{
+		EmitUnpopulated: true,
+		UseProtoNames:   true,
+	}
+
+	// RESTJsonUnmarshalOpts is a struct that holds the default unmarshal
+	// options for un-marshaling REST JSON into protobuf messages. This
+	// should be used when interacting with the REST proxy only.
+	RESTJsonUnmarshalOpts = &protojson.UnmarshalOptions{
+		AllowPartial: false,
+	}
+)
+
 // RPCTransaction returns a rpc transaction.
 func RPCTransaction(tx *lnwallet.TransactionDetail) *Transaction {
 	var destAddresses []string