Create tesla middleware for adding signature to federation requests

Change repo structure

lib/matrix_server/quick_check.ex

@@ -2,7 +2,7 @@ defmodule MatrixServer.QuickCheck do
   import Ecto.Query
 
   alias MatrixServer.{Repo, Room, Account, RoomServer}
-  alias MatrixServerWeb.Request.CreateRoom
+  alias MatrixServerWeb.Client.Request.CreateRoom
 
   def create_room(name \\ nil, topic \\ nil) do
     account = Repo.one!(from a in Account, limit: 1)

lib/matrix_server/room_server.ex

@@ -5,8 +5,8 @@ defmodule MatrixServer.RoomServer do
   import Ecto.Changeset
 
   alias MatrixServer.{Repo, Room, Event, StateResolution}
-  alias MatrixServerWeb.Request.CreateRoom
   alias MatrixServer.StateResolution.Authorization
+  alias MatrixServerWeb.Client.Request.CreateRoom
 
   @registry MatrixServer.RoomServer.Registry
   @supervisor MatrixServer.RoomServer.Supervisor

lib/matrix_server/schema/account.ex

@@ -4,7 +4,7 @@ defmodule MatrixServer.Account do
   import Ecto.{Changeset, Query}
 
   alias MatrixServer.{Repo, Account, Device}
-  alias MatrixServerWeb.Request.{Register, Login}
+  alias MatrixServerWeb.Client.Request.{Register, Login}
   alias Ecto.Multi
 
   @max_mxid_length 255

lib/matrix_server/schema/device.ex

@@ -4,7 +4,7 @@ defmodule MatrixServer.Device do
   import Ecto.{Changeset, Query}
 
   alias MatrixServer.{Account, Device, Repo}
-  alias MatrixServerWeb.Request.Login
+  alias MatrixServerWeb.Client.Request.Login
 
   @primary_key false
   schema "devices" do

lib/matrix_server/schema/room.ex

@@ -5,7 +5,7 @@ defmodule MatrixServer.Room do
   import Ecto.Query
 
   alias MatrixServer.{Repo, Room, Event, Alias, RoomServer}
-  alias MatrixServerWeb.Request.CreateRoom
+  alias MatrixServerWeb.Client.Request.CreateRoom
 
   @primary_key {:id, :string, []}
   schema "rooms" do

lib/matrix_server/schema/server_key_info.ex

@@ -4,7 +4,7 @@ defmodule MatrixServer.ServerKeyInfo do
   import Ecto.Query
 
   alias MatrixServer.{Repo, ServerKeyInfo, SigningKey}
-  alias MatrixServerWeb.FederationClient
+  alias MatrixServerWeb.Federation.HTTPClient
   alias MatrixServerWeb.Federation.Request.GetSigningKeys
   alias Ecto.Multi
 
@@ -35,7 +35,7 @@ defmodule MatrixServer.ServerKeyInfo do
   defp refresh_signing_keys(server_name) do
     # TODO: Handle expired keys.
     in_a_week = System.os_time(:millisecond) + 1000 * 60 * 60 * 24 * 7
-    client = FederationClient.client(server_name)
+    client = HTTPClient.client(server_name)
 
     with {:ok,
           %GetSigningKeys{
@@ -43,7 +43,7 @@ defmodule MatrixServer.ServerKeyInfo do
             verify_keys: verify_keys,
             valid_until_ts: valid_until
           }} <-
-           FederationClient.get_signing_keys(client) do
+           HTTPClient.get_signing_keys(client) do
       signing_keys =
         Enum.map(verify_keys, fn {key_id, %{"key" => key}} ->
           [server_name: server_name, signing_key_id: key_id, signing_key: key]