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submarine_swaps: fix bugs and create method for max_amount_forward_swap

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This commit is contained in:
ThomasV
2023-02-11 10:21:01 +01:00
parent 095b6dab0f
commit 215629235d
2 changed files with 14 additions and 4 deletions
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9
electrum/gui/qt/swap_dialog.py
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@@ -138,10 +138,11 @@ class SwapDialog(WindowModalDialog):
self._update_tx('!')
if self.tx:
amount = self.tx.output_value_for_address(ln_dummy_address())
max_swap_amt = self.swap_manager.get_max_amount()
max_recv_amt_ln = int(self.swap_manager.num_sats_can_receive())
max_recv_amt_oc = self.swap_manager.get_send_amount(max_recv_amt_ln, is_reverse=False) or float('inf')
max_amt = int(min(max_swap_amt, max_recv_amt_oc))
max_amt = self.swap_manager.max_amount_forward_swap()
if max_amt is None:
self.send_amount_e.setAmount(None)
self.max_button.setChecked(False)
return
if amount > max_amt:
amount = max_amt
self._update_tx(amount)

9
electrum/submarine_swaps.py
View File

@@ -639,3 +639,12 @@ class SwapManager(Logger):
sig = bytes.fromhex(tx.sign_txin(0, swap.privkey))
witness = [sig, preimage, witness_script]
txin.witness = bytes.fromhex(construct_witness(witness))
def max_amount_forward_swap(self) -> Optional[int]:
""" returns None if we cannot swap """
max_swap_amt_ln = self.get_max_amount()
max_recv_amt_ln = int(self.num_sats_can_receive())
max_amt_ln = int(min(max_swap_amt_ln, max_recv_amt_ln))
max_amt_oc = self.get_send_amount(max_amt_ln, is_reverse=False) or 0
min_amt_oc = self.get_send_amount(self.min_amount, is_reverse=False) or 0
return max_amt_oc if max_amt_oc >= min_amt_oc else None