That sounds like a perfect use case for a micro‑blockchain. Imagine each appliance posting an event when it needs a part, the system checks inventory, swaps tokens for parts, and records the transaction on a local ledger so the owner can audit it later. The only catch is keeping the nodes lightweight and ensuring the network stays secure even if a single device goes rogue. Still, it’s an elegant way to give your home a bit of autonomy while preserving transparency.