local constants = require("core.constants")
local protocol = require("core.protocol")
local M = {}
function M.open()
  for _, name in ipairs(peripheral.getNames()) do
    if peripheral.hasType(name, "modem") then rednet.open(name) end
  end
  return rednet.isOpen()
end
function M.broadcast(message) rednet.broadcast(message, constants.PROTOCOL) end
function M.send(id, message) return rednet.send(id, message, constants.PROTOCOL) end
function M.receive(timeout)
  local sender, message = rednet.receive(constants.PROTOCOL, timeout)
  if sender and protocol.valid(message) then return sender, message end
  return nil, nil
end
return M