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local timestamp = tonumber(ARGV[1])
local limit = tonumber(ARGV[2])
local expiry = tonumber(ARGV[3])
local amount = tonumber(ARGV[4])
if amount > limit then
return false
end
local entry = redis.call('lindex', KEYS[1], limit - amount)
if entry and tonumber(entry) >= timestamp - expiry then
return false
end
for i = 1, amount do
redis.call('lpush', KEYS[1], timestamp)
end
redis.call('ltrim', KEYS[1], 0, limit - 1)
redis.call('expire', KEYS[1], expiry)
return true
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