class Async::HTTP::Protocol::HTTP2::Promise

def build_request(headers)
 = HTTP::Request.new
.headers = Headers.new
.each do |key, value|
 == SCHEME
n @stream.send_failure(400, "Request scheme already specified") if request.scheme
st.scheme = value
key == AUTHORITY
n @stream.send_failure(400, "Request authority already specified") if request.authority
st.authority = value
key == METHOD
n @stream.send_failure(400, "Request method already specified") if request.method
st.method = value
key == PATH
n @stream.send_failure(400, "Request path already specified") if request.path
st.path = value
st.headers[key] = value
request

def initialize(protocol, headers, stream_id)
	super(protocol, stream_id)
	
	@request = build_request(headers)
end