Main Controller

--Main Duper Controller
local protocol = "TNTDUPER";
rednet.open("back");
local enderAddress;
local singularityAddress;
local tntAddress;
while true do
enderAddress = rednet.lookup(protocol, "ender_dust");
singularityAddress = rednet.lookup(protocol, "singularity");
tntAddress = rednet.lookup(protocol, "duper");
if enderAddress ~= nil and singularityAddress ~= nil and tntAddress ~= nil then break; end
sleep(0);
end

term.clear();
term.setCursorPos(1,1);


function getDispenserStatus(dispenser)
    local dispenserAddress = rednet.lookup(protocol, dispenser);
    if dispenserAddress == nil then return false; end
    rednet.send(dispenserAddress, "hasItem", protocol);
    local from, has = rednet.receive(protocol, 1);
    if has == nil then has = false; end
    return has;
end

function activateDispensers()
    rednet.send(enderAddress, "triggerDispenser", protocol);
    rednet.send(singularityAddress, "triggerDispenser", protocol);
end

function activateTNT()
    rednet.send(tntAddress, "activate", protocol);
end

function server()
    while true do
        if getDispenserStatus("ender_dust") and getDispenserStatus("singularity") and redstone.getInput("front") == false then
            activateTNT();
            sleep(3);
            activateDispensers();
            sleep(3);
        end
        sleep(0);
    end
end

server();