AH Buy Price Tracker (Fabric 1.21.10)

A lightweight client-side Fabric mod for Hypixel SkyBlock that automatically tracks the price and purchase time of items bought from the Auction House and permanently displays this information in the item tooltip.

Features

Automatically detects Auction House purchases via chat.
Assigns the correct price and timestamp to the exact bought item.
Uses Hypixel item data (ExtraAttributes.uuid, id, or NBT fingerprint).
Works even when items do not have a UUID.
Stores data locally in config/ahprice.json.

How It Works

Detects the message:
You purchased ... for ... coins!
Tracks inventory changes for a short time window
Identifies the exact item using:
UUID (best case)
Hypixel item ID
NBT fingerprint fallback
Saves purchase data locally and re-applies it to the tooltip permanently

Requirements

Minecraft 1.21.10
Fabric Loader
Fabric API
Java 21

Notes

This is a client-side only mod.
Does not modify server data.
Works only for items purchased while the mod is installed.
If an item has no UUID, a fallback system ensures tracking still works.

Saved purchase data: .minecraft/config/ahprice.json