Update proto builder

.gitmodules

@@ -1,5 +1,5 @@
-[submodule "protocol"]
-	path = protocol
+[submodule "proto/tron"]
+	path = proto/tron
 	url = https://github.com/tronprotocol/protocol.git
 	branch = master
-	ignore = dirty
+	ignore = dirty

gen-proto.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-protoc -I=./protocol -I/usr/lib -I./third_party/googleapis --go_out=plugins=grpc,paths=source_relative:. ./protocol/core/*.proto ./protocol/core/contract/*.proto 
-protoc -I=./protocol -I/usr/lib -I./third_party/googleapis --go_out=plugins=grpc,paths=source_relative:. ./protocol/api/*.proto
-
-protoc -I=./protocol -I./protocol_util -I/usr/lib -I./third_party/googleapis --go_out=plugins=grpc,paths=source_relative:./protocol_util ./protocol_util/*.proto
+protoc -I=./proto/tron -I/usr/lib -I./proto/googleapis --go_out=plugins=grpc,paths=source_relative:./pkg/proto ./proto/tron/core/*.proto ./proto/tron/core/contract/*.proto 
+protoc -I=./proto/tron -I/usr/lib -I./proto/googleapis --go_out=plugins=grpc,paths=source_relative:./pkg/proto ./proto/tron/api/*.proto
+mkdir -p ./pkg/proto/util
+protoc -I=./proto/tron -I./proto/util -I/usr/lib -I./proto/googleapis --go_out=plugins=grpc,paths=source_relative:./pkg/proto/util ./proto/util/*.proto

go.mod

@@ -21,4 +21,5 @@ require (
 	golang.org/x/crypto v0.0.0-20200429183012-4b2356b1ed79
 	google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84
 	google.golang.org/grpc v1.29.1
+	google.golang.org/protobuf v1.21.0
 )