What new capabilities does KIP-10 add to enable Kaspa micropayments?

KIP-10 introduces new script opcodes that let Kaspa UTXOs simulate an account-based payment model, enabling micropayments without requiring fresh signatures every time value is sent to an address. The key addition is script introspection: a script can now inspect the transaction it is being spent in — checking output values, destination addresses, and other properties — and enforce rules about how a UTXO may be used, all without asking every involved party to sign again. This removes the coordination bottleneck that made the KIP-9 workaround (adding inputs) impractical for automated payment flows. For users and developers, this means payment channels, subscriptions, and other micropayment patterns become viable on Kaspa within the existing UTXO security model.