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fix: exponential backoff for preimage polling to avoid relay rate limiting #52

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fix: exponential backoff for preimage polling to avoid relay rate limiting #52

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13 changes: 12 additions & 1 deletion tasks.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,6 +110,10 @@ async def execute_payment() -> str:
True # currently required by nip 47 specs, might change in future
)
payment_status: PaymentStatus | None = None
poll_interval = 0.5
max_poll_interval = 5.0
poll_attempts = 0
max_poll_attempts = 120 # ~2 minutes total with backoff
while wait_for_preimage:
payment_status = await check_transaction_status(wallet_id, payment_hash)
if payment_status.success:
Expand All @@ -122,7 +126,14 @@ async def execute_payment() -> str:
},
"in_budget": in_budget,
}
await asyncio.sleep(0.05)
poll_attempts += 1
if poll_attempts >= max_poll_attempts:
logger.warning(
f"Gave up waiting for preimage after {poll_attempts} attempts"
)
break
await asyncio.sleep(poll_interval)
poll_interval = min(poll_interval * 1.5, max_poll_interval)
if not payment_status:
raise Exception("Payment status not found")
return {
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