* feat(cdk): add amount_mintable method and improve mint quote validation
- Add MintQuote::amount_mintable() method to calculate available mint amount
- Update mint issue logic to use centralized amount calculation
- Add validation for Bolt11 payment amounts matching quote amounts
- Improve error handling and logging for quote amount mismatches
Rename wait_any_incoming_payment to wait_payment_event and change return type
from WaitPaymentResponse stream to Event stream. This introduces a new Event
enum that wraps payment responses, making the system more extensible for
future event types.
- Add Event enum with PaymentReceived variant
- Update MintPayment trait method signature
- Refactor all payment backend implementations (LND, CLN, LNBits, fake wallet)
- Update mint and payment processor to handle new event stream forma
* refactor(cdk): defer BOLT12 invoice fetching to payment execution
Move BOLT12 invoice generation from quote creation to payment time, make
request_lookup_id optional for offers, and simplify payment structures by
removing unnecessary boxing and intermediate storage of invoices.
* feat(cdk): add Bolt12 mint quote subscription support
Extends subscription to handle Bolt12 payment method alongside existing Bolt11 support across wallet, mint, and CLI components.
* feat: implement secondary repayment queue for any-amount invoices
- Keep original immediate payment behavior for ALL invoices (fixed and any-amount)
- Add secondary repayment queue that randomly repays any-amount invoices again
- Secondary repayments occur at random intervals between 30 seconds and 3 minutes
- Only any-amount invoices (amount=0) are added to secondary repayment queue
- Each any-amount invoice gets paid twice: once immediately, once from secondary queue
- Queue has configurable max size with LRU eviction policy
- Add comprehensive tests and update documentation
* test: add test for multiple payment verification
- Add test to verify that secondary repayment system creates multiple payments
- Test checks that immediate payment is received first
- Demonstrates the dual payment system working correctly
