The code is literally 12 years old at OSRS gold greatest for the bottom of Runescape. It is 07 RuneScape, so the mathematics isn't terribly difficult. I'm not a Jagex fanboy, they've screwed up many times and I hate a lot of the upgrades they've made (and I believe that they're greedy moneygrubbers when it comes to RS3), but I had been an active participant through the bot nuking procedure.
https://www.rsgoldfast.com/