chore: update protobuf * gRPC toolchains

grpc/README.md

@@ -10,16 +10,28 @@ See [API documentation](..\docs\apis.md)
 
 ##### Installling tools
 
-Download the [Protocol Buffers compiler](https://github.com/protocolbuffers/protobuf/releases) (protoc-3.11.4-*) for your platform and add `protoc` to `PATH` environment variable 
+Download the [Protocol Buffers compiler](https://github.com/protocolbuffers/protobuf/releases) (protoc-3.13.0-*) for your platform and add `protoc` to `PATH` environment variable 
 
-For generating Go code:
+For generating Go code, install `protoc-gen-go` (v1.32.0):
 ```bash
-GIT_TAG="v1.4.0"
-go get -d -u github.com/golang/protobuf/protoc-gen-go
-git -C "$(go env GOPATH)"/src/github.com/golang/protobuf checkout $GIT_TAG
-go install github.com/golang/protobuf/protoc-gen-go
+GIT_TAG="v1.32.0"
+go get -d -u google.golang.org/protobuf/cmd/protoc-gen-go
+git -C "$(go env GOPATH)"/src/google.golang.org/protobuf checkout $GIT_TAG
+go install google.golang.org/protobuf/cmd/protoc-gen-go
 ```
-(Update to google.golang.org/protobuf when https://github.com/grpc/grpc-go/pull/3435 resolves)
+
+Also install `protoc-gen-go-grpc`:
+```bash
+go get -u google.golang.org/protobuf/cmd/protoc-gen-go
+```
+
+Or install using [gobin](https://github.com/myitcv/gobin):
+```bash
+gobin google.golang.org/protobuf/cmd/protoc-gen-go
+gobin google.golang.org/grpc/cmd/protoc-gen-go-grpc
+```
+
+For generating HTTP JSON APIs with [grpc-gateway](https://grpc-ecosystem.github.io/grpc-gateway/), follow the [documentation](https://github.com/grpc-ecosystem/grpc-gateway/tree/v2#installation).
 
 For generating Java code: From `bdledger-sdk-java` run `gradle generateProto`
 
@@ -50,7 +62,7 @@ References:
 
 Run:
 ```bash
-./scripts/gen [-a, --async] [go] [nodejs] [ts] [docs]
+./scripts/gen [-a, --async] [go] [gohttp] [nodejs] [ts] [docs]
 ```
 Use `-a` or `--async` to speed up generation by asynchronously and concurrently generating all code and documentation (script will exit without waiting for completion)
 

grpc/scripts/gen.bat

@@ -18,7 +18,7 @@ for %%A in (%*) do (
     set out=%gen%\go
     if not exist !out! mkdir !out!
     echo Generating Go code
-    !exec! --go_out=plugins=grpc:!out! --govalidators_out=!out! %pbs%
+    !exec! --go-grpc_out=!out! --govalidators_out=!out! %pbs%
   )
   if "%%A"=="gohttp" (
     set plugin=protoc-gen-grpc-gateway

grpc/scripts/gen.sh

@@ -46,7 +46,7 @@ do
             mkdir -p $out
         fi
         echo "Generating Go code"
-        $exec --go_out=plugins=grpc:$out --govalidators_out=$out $pb_files $async_tag
+        $exec --go-grpc_out=$out --govalidators_out=$out $pb_files $async_tag
     fi
     if [ $aug == "gohttp" ]; then
         plugin=protoc-gen-grpc-gateway