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Blink: timeout for LN probes (#444)

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* blink: timeout for ln probes

* make MINIMUM_FEE_MSAT a const

* format
This commit is contained in:
callebtc
2024-02-18 23:47:21 +01:00
committed by GitHub
parent a3145a93d5
commit 1e26f235d5
1 changed files with 21 additions and 12 deletions
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33
cashu/lightning/blink.py
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@@ -24,8 +24,11 @@ from .base import (
# according to https://github.com/GaloyMoney/galoy/blob/7e79cc27304de9b9c2e7d7f4fdd3bac09df23aac/core/api/src/domain/bitcoin/index.ts#L59
BLINK_MAX_FEE_PERCENT = 0.5
DIRECTION_SEND = "SEND"
DIRECTION_RECEIVE = "RECEIVE"
PROBE_FEE_TIMEOUT_SEC = 1
MINIMUM_FEE_MSAT = 2000
class BlinkWallet(LightningBackend):
@@ -360,34 +363,40 @@ class BlinkWallet(LightningBackend):
"variables": variables,
}
fees_response_msat = 0
try:
r = await self.client.post(
url=self.endpoint,
data=json.dumps(data),
timeout=None,
timeout=PROBE_FEE_TIMEOUT_SEC,
)
r.raise_for_status()
resp: dict = r.json()
if resp.get("data", {}).get("lnInvoiceFeeProbe", {}).get("errors"):
raise Exception(
resp["data"]["lnInvoiceFeeProbe"]["errors"][0].get("message")
or "Unknown error"
)
fees_response_msat = (
int(resp.get("data", {}).get("lnInvoiceFeeProbe", {}).get("amount"))
* 1000
)
except httpx.ReadTimeout:
pass
except Exception as e:
logger.error(f"Blink API error: {str(e)}")
raise e
resp: dict = r.json()
if resp.get("data", {}).get("lnInvoiceFeeProbe", {}).get("errors"):
raise Exception(
resp["data"]["lnInvoiceFeeProbe"]["errors"][0].get("message")
or "Unknown error"
)
invoice_obj = decode(bolt11)
assert invoice_obj.amount_msat, "invoice has no amount."
amount_msat = int(invoice_obj.amount_msat)
fees_response_msat = (
int(resp.get("data", {}).get("lnInvoiceFeeProbe", {}).get("amount")) * 1000
)
# we either take fee_msat_response or the BLINK_MAX_FEE_PERCENT, whichever is higher
# we take the highest: fee_msat_response, or BLINK_MAX_FEE_PERCENT, or 2000 msat
fees_msat = max(
fees_response_msat,
max(math.ceil(amount_msat / 100 * BLINK_MAX_FEE_PERCENT), 1000),
max(math.ceil(amount_msat / 100 * BLINK_MAX_FEE_PERCENT), MINIMUM_FEE_MSAT),
)
fees = Amount(unit=Unit.msat, amount=fees_msat)