- 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
- persisted states are saved
- state transitions are checked
- transient states are stored in channel.peer_state
- new channel states: 'PREOPENING', 'FUNDED' and 'REDEEMED'
- upgrade storage to version 21
- allow 'spend max' when opening a channel (fixes#5698)
- display amount minus fee when 'max' buttons are pressed
- estimate fee of channel funding using a template with dummy address
- Output selection belongs in the Send tab.
- Tx finalization is performed in a confirmation dialog
(ConfirmTxDialog or PreviewTxDialog)
- the fee slider is shown in the confirmation dialog
- coin control works by selecting items in the coins tab
- user can save invoices and pay them later
- ConfirmTxDialog is used when opening channels and sweeping keys
- 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.
- 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
