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diff --git a/priv/repo/migrations/20200309123730_create_chats.exs b/priv/repo/migrations/20200309123730_create_chats.exs
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+++ b/priv/repo/migrations/20200309123730_create_chats.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Repo.Migrations.CreateChats do
+  use Ecto.Migration
+
+  def change do
+    create table(:chats) do
+      add(:user_id, references(:users, type: :uuid))
+      # Recipient is an ActivityPub id, to future-proof for group support.
+      add(:recipient, :string)
+      add(:unread, :integer, default: 0)
+      timestamps()
+    end
+
+    # There's only one chat between a user and a recipient.
+    create(index(:chats, [:user_id, :recipient], unique: true))
+  end
+end