Mainserver

function get()
var1 = 0
var2 = 0
var3 = 0
var4 = 0
var5 = 0
var6 = 0
var7 = 0
var8 = 0
var9 = 0
var10 = 0
var11 = 0
var12 = 0
var13 = 0
var14 = 0
var15 = 0
print("get")
var1, var2, var3 = rednet.receive()
print(tostring(var1)..tostring(var2)..tostring(var3))
if var2 == "request" then request() else deny()
end
end

function load()
print("load")
rednet.open("back")
print("activating server")
get()
end

function request()
print("request")
var4, var5, var6 = rednet.receive()
print(tostring(var4)..tostring(var5)..tostring(var6))
if fs.exists("usernames/"..tostring(var5)) == true then
    pin()
else
    deny()
end
end

function pin()
print("pin")
rednet.send(var1, "auth")
var7, var8, var9 = rednet.receive()
print(var7..var8)
h = fs.open("userpins/"..tostring(var5).."/pin", "r")
    pinno = h.readAll()
h.close()
if var8 == pinno then auth() else deny()
end
end

function auth()
print("auth")
rednet.send(var7,"auth")
command()
end

function command()
state = true
print("command")
while state == true do
var10, var11 = rednet.receive()
print(tostring(var10)..tostring(var11))
if var11 == "check balance" then checkbalance()
    elseif var11 == "withdraw" then withdraw()
        elseif var11 == "transfer" then transfer()
            elseif var11 == "logout" then logout()
        end
    end
end

function checkbalance()
print("checkbalance")
h = fs.open("userbalance/"..tostring(var5).."/balance", "r")
bal = h.readAll()
rednet.send(var10, bal)
command()
end

function withdraw()
print("withdraw")
h = fs.open("userbalance/"..tostring(var5).."/balance", "r")
bal = h.readAll()
h.close()
var13, var14 = rednet.receive()
print("after error")
print(tostring(var13)..tostring(var14))
curbal = bal - var14
h = fs.open("userbalance/"..tostring(var5).."/balance", "w")
h.write(tostring(curbal))
h.close()
print("var13: "..var13)
print("var14: "..var14)
print("curbal: ".. curbal)
rednet.send(var13, tostring(var14).." has been deducted you current balance is "..tostring(curbal))
end

function transfer()
print("transfer")
end

function logout()
print("logout")
state = false
get()
end

function deny()
print("deny")
rednet.send(var1, "denied")
end

load()