def call_rpc(method, jsonrpc: DEFAULT_JSONRPC, params: DEFAULT_PARAMS, id: DEFAULT_ID)
      conn.post("/", rpc_params(method, jsonrpc: jsonrpc, params: params, id: id))
    end
def call_rpc(method, jsonrpc: DEFAULT_JSONRPC, params: DEFAULT_PARAMS, id: DEFAULT_ID)
      conn.post("/", rpc_params(method, jsonrpc: jsonrpc, params: params, id: id))
    end
wrapper for call rpc method

 @param method [String] method you want to call
 @param jsonrpc [String] jsonrpc version
 @param params [Array] rpc params
 @param id [Integer] jsonrpc id

 @return [Faraday::Response]