From 69bc5dbb1612de21a4893dcf4b8e1d7abf1f05b2 Mon Sep 17 00:00:00 2001
From: kay27 <kay27@bk.ru>
Date: Fri, 29 Apr 2022 02:43:25 +0300
Subject: [PATCH] Fix UNIQUE constraint failed: auth.name in callback
 createAuth()

---
 mods/PLAYER/mcl_anticheat/init.lua      |  3 +++
 mods/PLAYER/mcl_anticheat/ratelimit.lua | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 mods/PLAYER/mcl_anticheat/ratelimit.lua

diff --git a/mods/PLAYER/mcl_anticheat/init.lua b/mods/PLAYER/mcl_anticheat/init.lua
index 2e3f427a6..cadad5c92 100644
--- a/mods/PLAYER/mcl_anticheat/init.lua
+++ b/mods/PLAYER/mcl_anticheat/init.lua
@@ -1,3 +1,6 @@
+local modpath = minetest.get_modpath(minetest.get_current_modname())
+dofile(modpath .. "/ratelimit.lua")
+
 local enable_anticheat = true
 local kick_cheaters = false
 local kick_threshold = 10
diff --git a/mods/PLAYER/mcl_anticheat/ratelimit.lua b/mods/PLAYER/mcl_anticheat/ratelimit.lua
new file mode 100644
index 000000000..4e4f5bd2d
--- /dev/null
+++ b/mods/PLAYER/mcl_anticheat/ratelimit.lua
@@ -0,0 +1,21 @@
+-- by LoneWolfHT
+-- https://github.com/minetest/minetest/issues/12220#issuecomment-1108789409
+
+local ratelimit = {}
+local after = minetest.after
+local LIMIT = 2
+
+local function remove_entry(ip)
+	ratelimit[ip] = nil
+end
+
+minetest.register_on_mods_loaded(function()
+	table.insert(core.registered_on_prejoinplayers, 1, function(player, ip)
+		if ratelimit[ip] then
+			return "You are joining too fast, please try again"
+		else
+			ratelimit[ip] = true
+			after(LIMIT, remove_entry, ip)
+		end
+	end)
+end)