The intended behaviour is that when the user launches the app,
the wallet we try to open is the wallet most recently opened by the user.
The old code in 'on_stop' in practice only got called if the user exited via
repeatedly pressing the system 'back' button.
related #5952
- no more passing around "invoice" in GUIs, invoice "paid" detection is now handled by wallet logic
- a tx can now pay for multiple invoices
- an invoice can now be paid by multiple txs (through partial payments)
- new data structure in storage: prevouts_by_scripthash
- type: scripthash -> set of (outpoint, value)
- also, storage upgrade to build this for existing wallets
- Move 'handle_error_code_from_failed_htlc' to channel_db,
and call it from pay_to_route, because it should not be
called when HTLCs are forwarded.
- Replace 'payment_received' and 'payment_status'
callbacks with 'invoice_status' and 'request_status'.
- Show payment error logs in the Qt GUI
- In the invoices list, show paid invoices for which
we still have the log.
The few other cases that used SimpleConfig.get_instance() now
either get passed a config instance, or they try to get a reference
to something else that has a reference to a config.
(see lnsweep, qt/qrcodewidget, qt/qrtextedit)
- use InvoiceInfo (NamedTuple) for normal operations,
because lndecode operations can be very slow.
- all invoices/requests are stored in wallet
- invoice expiration detection is performed in wallet
- CLI commands: list_invoices, add_request, add_lightning_request
- revert 0062c6d695 because it forbids self-payments
- Terminology: use 'invoices' for outgoing payments, 'requests' for incoming payments
- At the GUI level, try to handle invoices in a generic way.
- Display ongoing payments in send tab.
- create unique instances of channels_dialog and addresses_dialog
- display and refresh balances in channels_dialog
- improve formatting of tx history
- repurpose left button in receive_tab
