Expanding on BOLT12

Bitcoin Improvement Proposal 70 (BIP70) introduced a refund field feature, designed to facilitate transaction reversals within the Bitcoin network. This mechanism was particularly effective in applications such as the Bitcoin Fluid Dispenser, an innovative project that can be explored further at Andy Schroder's website. The refund capability provided by BIP70 represents a significant advancement in handling transactions, allowing for smoother operations in various use cases where refunds might be necessary. This functionality underscores the evolving nature of Bitcoin's infrastructure, catering to a broader range of financial activities beyond simple transfers.