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lnworker: guess routing fee in num_sats_can_send

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This commit is contained in:
ThomasV
2021-03-26 10:34:50 +01:00
parent b64fcfb9e3
commit fdb0fe2f4c
1 changed files with 13 additions and 7 deletions
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20
electrum/lnworker.py
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@@ -81,7 +81,7 @@ from .channel_db import get_mychannel_info, get_mychannel_policy
from .submarine_swaps import SwapManager
from .channel_db import ChannelInfo, Policy
from .mpp_split import suggest_splits
from .trampoline import create_trampoline_route_and_onion
from .trampoline import create_trampoline_route_and_onion, TRAMPOLINE_FEES
if TYPE_CHECKING:
from .network import Network
@@ -1928,22 +1928,28 @@ class LNWallet(LNWorker):
for chan in self.channels.values())) / 1000
def num_sats_can_send(self) -> Decimal:
can_send = Decimal(0)
can_send = 0
with self.lock:
if self.channels:
for c in self.channels.values():
if c.is_active() and not c.is_frozen_for_sending():
can_send += Decimal(c.available_to_spend(LOCAL)) / 1000
return can_send
can_send += c.available_to_spend(LOCAL)
# Here we have to guess a fee, because some callers (submarine swaps)
# use this method to initiate a payment, which would otherwise fail.
fee_base_msat = TRAMPOLINE_FEES[3]['fee_base_msat']
fee_proportional_millionths = TRAMPOLINE_FEES[3]['fee_proportional_millionths']
# inverse of fee_for_edge_msat
can_send_minus_fees = (can_send - fee_base_msat) * 1_000_000 // ( 1_000_000 + fee_proportional_millionths)
return Decimal(can_send_minus_fees) / 1000
def num_sats_can_receive(self) -> Decimal:
can_receive = Decimal(0)
can_receive = 0
with self.lock:
if self.channels:
for c in self.channels.values():
if c.is_active() and not c.is_frozen_for_receiving():
can_receive += Decimal(c.available_to_spend(REMOTE)) / 1000
return can_receive
can_receive += c.available_to_spend(REMOTE)
return Decimal(can_receive) / 1000
def can_pay_invoice(self, invoice: LNInvoice) -> bool:
return invoice.get_amount_sat() <= self.num_sats_can_send()