does it support grpc protocol process

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hello, i want to process grpc stream by this sdk,i deployment a wasm in my envoy,but i got error :
pstream connect error or disconnect/reset before headers. reset reason: protocol error

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it works in http,but when i set my cluster to my grpc server i got this error

client -> envoy(wasm)-> grpc server

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my wasm code is

#include <string>
#include <string_view>
#include <unordered_map>
 
#include "proxy_wasm_intrinsics.h"
 
class ExampleRootContext : public RootContext {
public:
  explicit ExampleRootContext(uint32_t id, std::string_view root_id) : RootContext(id, root_id) {}
 
  bool onStart(size_t) override;
  bool onConfigure(size_t) override;
  void onTick() override;
};
 
class ExampleContext : public Context {
public:
  explicit ExampleContext(uint32_t id, RootContext* root) : Context(id, root) {}
 
  void onCreate() override;
  FilterHeadersStatus onRequestHeaders(uint32_t headers, bool end_of_stream) override;
  FilterDataStatus onRequestBody(size_t body_buffer_length, bool end_of_stream) override;
  FilterHeadersStatus onResponseHeaders(uint32_t headers, bool end_of_stream) override;
  FilterDataStatus onResponseBody(size_t body_buffer_length, bool end_of_stream) override;
  void onDone() override;
  void onLog() override;
  void onDelete() override;
};
static RegisterContextFactory register_ExampleContext(CONTEXT_FACTORY(ExampleContext),
                                                      ROOT_FACTORY(ExampleRootContext),
                                                      "my_root_id");
 
bool ExampleRootContext::onStart(size_t) {
  LOG_TRACE("onStart");
  return true;
}
 
bool ExampleRootContext::onConfigure(size_t) {
  LOG_TRACE("onConfigure");
  proxy_set_tick_period_milliseconds(1000); // 1 sec
  return true;
}
 
void ExampleRootContext::onTick() { LOG_TRACE("onTick"); }
 
void ExampleContext::onCreate() { LOG_WARN(std::string("onCreate " + std::to_string(id()))); }
 
FilterHeadersStatus ExampleContext::onRequestHeaders(uint32_t, bool) {
  LOG_DEBUG(std::string("onRequestHeaders ") + std::to_string(id()));
  auto result = getRequestHeaderPairs();
  auto pairs = result->pairs();
  LOG_INFO(std::string("headers: ") + std::to_string(pairs.size()));
  for (auto& p : pairs) {
    LOG_INFO(std::string(p.first) + std::string(" -> ") + std::string(p.second));
  }
  return FilterHeadersStatus::Continue;
}
 
FilterHeadersStatus ExampleContext::onResponseHeaders(uint32_t, bool) {
  LOG_DEBUG(std::string("onResponseHeaders ") + std::to_string(id()));
  auto result = getResponseHeaderPairs();
  auto pairs = result->pairs();
  LOG_INFO(std::string("headers: ") + std::to_string(pairs.size()));
  for (auto& p : pairs) {
    LOG_INFO(std::string(p.first) + std::string(" -> ") + std::string(p.second));
  }
  return FilterHeadersStatus::Continue;
}
 
FilterDataStatus ExampleContext::onRequestBody(size_t body_buffer_length,
                                               bool /* end_of_stream */) {
  auto body = getBufferBytes(WasmBufferType::HttpRequestBody, 0, body_buffer_length);
  LOG_ERROR(std::string("onRequestBody ") + std::string(body->view()));
  return FilterDataStatus::Continue;
}
 
FilterDataStatus ExampleContext::onResponseBody(size_t /* body_buffer_length */,
                                                bool /* end_of_stream */) {
  setBuffer(WasmBufferType::HttpResponseBody, 0, 17, "Hello, Wasm world");
  return FilterDataStatus::Continue;
}
 
void ExampleContext::onDone() { LOG_WARN(std::string("onDone " + std::to_string(id()))); }
 
void ExampleContext::onLog() { LOG_WARN(std::string("onLog " + std::to_string(id()))); }
 
void ExampleContext::onDelete() { LOG_WARN(std::string("onDelete " + std::to_string(id()))); }

[INT2ECALL]

solve by add clusters http2 option

    http2_protocol_options:
      max_concurrent_streams: 100