local current_time = redis.call('TIME')
local trim_time = tonumber(current_time[1]) - ARGV[2]
redis.call('ZREMRANGEBYSCORE', ARGV[1], 0, trim_time)
local request_count = redis.call('ZCARD', ARGV[1])
if request_count < tonumber(ARGV[3]) then
    redis.call('ZADD', ARGV[1], current_time[1], current_time[1] .. current_time[2])
    redis.call('EXPIRE', ARGV[1], ARGV[2])
    return 0
end
return 1