local CHANNEL = 666

settings.define("dimension", {
  description = "Dimension to serve",
  default = "overworld",
  type = "string",
})
local dim = settings.get("dimension")

local modem = peripheral.find("modem")
assert(modem)
modem.open(CHANNEL)

print("Serving requests for dimension '" .. dim .. "'")
while true do
  local event, side, channel, replyChannel, reply, distance = os.pullEvent("modem_message")
  assert(channel == CHANNEL)

  -- AKA we are in the same dimension
  if distance then
    print("Responding to request from computer #" .. replyChannel - CHANNEL)
    modem.transmit(replyChannel, channel, dim)
  end
end