fix(lightning): never report a slow in-flight payment as failed

Slow multi-hop payments (>15s routing) surfaced as "Payment failed"
while LND settled them in the background: the shared LND REST client's
15s total timeout aborted the synchronous /v1/channels/transactions
wait, and every UI path treated that abort as a definitive failure. The
payment then succeeded anyway and only appeared in history on the next
background poll.

Backend: lnd.payinvoice now decodes the invoice up front for its payment
hash, pays on a dedicated 120s client, and answers status:"pending" with
the hash (never an error) when the wait elapses after the payment was
handed to LND — only a pre-connect failure is still a hard error. New
lnd.paymentstatus RPC reports succeeded/failed/in_flight (with humanized
failure reasons) from /v1/payments.

Frontend: new rpcClient.payLightningInvoice() pays then polls
lnd.paymentstatus to a real terminal state (3s interval, up to 2 min);
all five call sites (send modal, scan modal, web5 unified send, peer-file
purchase, app-launcher payments) migrated. Failure is only shown when LND
itself declares FAILED; a still-settling payment shows an in-flight state
and success fires the transaction refresh.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
archipelago 2026-07-27 05:31:55 -04:00
parent aa272bfcf4
commit 9cd507269c
8 changed files with 264 additions and 36 deletions

View File

@ -132,6 +132,7 @@ impl RpcHandler {
"lnd.estimatefee" => self.handle_lnd_estimatefee(params).await,
"lnd.createinvoice" => self.handle_lnd_createinvoice(params).await,
"lnd.payinvoice" => self.handle_lnd_payinvoice(params).await,
"lnd.paymentstatus" => self.handle_lnd_paymentstatus(params).await,
"lnd.create-psbt" => self.handle_lnd_create_psbt(params).await,
"lnd.finalize-psbt" => self.handle_lnd_finalize_psbt(params).await,
"lnd.create-raw-tx" => self.handle_lnd_create_raw_tx(params).await,

View File

@ -36,6 +36,33 @@ impl RpcHandler {
let (client, macaroon_hex) = self.lnd_client().await?;
// Decode the invoice up front (fast, local) so we know its payment
// hash BEFORE handing it to LND. If the payment outlives our wait
// below, the hash is what lets the UI keep tracking it instead of
// declaring a false failure. Best-effort: a decode hiccup must not
// block the payment itself.
let (decoded_hash, decoded_amt) = match client
.get(format!("{LND_REST_BASE_URL}/v1/payreq/{payment_request}"))
.header("Grpc-Metadata-macaroon", &macaroon_hex)
.send()
.await
{
Ok(r) => match r.json::<serde_json::Value>().await {
Ok(d) => (
d.get("payment_hash")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string(),
d.get("num_satoshis")
.and_then(|v| v.as_str())
.and_then(|s| s.parse::<i64>().ok())
.unwrap_or(0),
),
Err(_) => (String::new(), 0),
},
Err(_) => (String::new(), 0),
};
let mut pay_body = serde_json::json!({
"payment_request": payment_request,
});
@ -43,13 +70,46 @@ impl RpcHandler {
pay_body["amt"] = serde_json::json!(amt.to_string());
}
let resp = client
// `/v1/channels/transactions` is SYNCHRONOUS: it blocks until the
// payment settles or definitively fails, and multi-hop routing with
// retries routinely takes longer than the shared client's 15s budget.
// That 15s abort used to surface as "Payment failed" while LND kept
// paying in the background — the payment then succeeded and appeared
// in history a minute later. Wait up to 120s on a dedicated client,
// and treat a post-connect timeout as IN FLIGHT (status: pending),
// never as failure — only LND may declare a payment failed.
let pay_client = reqwest::Client::builder()
.no_proxy()
.connect_timeout(std::time::Duration::from_secs(10))
.timeout(std::time::Duration::from_secs(120))
.danger_accept_invalid_certs(true)
.build()
.context("Failed to create HTTP client")?;
let resp = match pay_client
.post(format!("{LND_REST_BASE_URL}/v1/channels/transactions"))
.header("Grpc-Metadata-macaroon", &macaroon_hex)
.json(&pay_body)
.send()
.await
.context("Failed to pay invoice")?;
{
Ok(r) => r,
Err(e) if e.is_connect() => {
// Never reached LND — nothing was sent; this IS a hard error.
return Err(anyhow::anyhow!("Could not reach LND to pay: {e}"));
}
Err(_) => {
// Timed out (or lost the connection) AFTER the payment was
// handed to LND — it may well still succeed. Report pending
// with the hash so the caller can poll lnd.paymentstatus.
info!("payinvoice wait elapsed; payment still in flight");
return Ok(serde_json::json!({
"status": "pending",
"payment_hash": decoded_hash,
"amount_sats": decoded_amt,
}));
}
};
let status = resp.status();
let body: serde_json::Value = resp
@ -86,20 +146,105 @@ impl RpcHandler {
.and_then(|r| r.get("total_amt"))
.and_then(|v| v.as_str())
.and_then(|s| s.parse::<i64>().ok())
.unwrap_or(0);
.unwrap_or(decoded_amt);
let payment_hash = body
.get("payment_hash")
.and_then(|v| v.as_str())
.unwrap_or("")
.to_string();
.filter(|s| !s.is_empty())
.map(|s| s.to_string())
.unwrap_or(decoded_hash);
Ok(serde_json::json!({
"status": "succeeded",
"payment_hash": payment_hash,
"amount_sats": amount_sat,
}))
}
/// Status of an outgoing Lightning payment by hex payment hash. Lets the
/// UI resolve a payinvoice that outlived its synchronous wait (`status:
/// "pending"`) to a real terminal state instead of guessing.
pub(in crate::api::rpc) async fn handle_lnd_paymentstatus(
&self,
params: Option<serde_json::Value>,
) -> Result<serde_json::Value> {
let params = params.unwrap_or_default();
let payment_hash = params
.get("payment_hash")
.and_then(|v| v.as_str())
.ok_or_else(|| anyhow::anyhow!("Missing 'payment_hash' parameter"))?;
if payment_hash.len() != 64 || !payment_hash.chars().all(|c| c.is_ascii_hexdigit()) {
return Err(anyhow::anyhow!("Invalid payment hash"));
}
let (client, macaroon_hex) = self.lnd_client().await?;
let resp = client
.get(format!(
"{LND_REST_BASE_URL}/v1/payments?include_incomplete=true&max_payments=100&reversed=true"
))
.header("Grpc-Metadata-macaroon", &macaroon_hex)
.send()
.await
.context("LND REST connection failed")?;
let body: serde_json::Value = resp
.json()
.await
.context("Failed to parse payments response")?;
let hash_lower = payment_hash.to_lowercase();
let found = body
.get("payments")
.and_then(|v| v.as_array())
.and_then(|arr| {
arr.iter().find(|p| {
p.get("payment_hash").and_then(|v| v.as_str())
== Some(hash_lower.as_str())
})
});
let Some(p) = found else {
// Not in the latest window — either very old or LND never saw it.
return Ok(serde_json::json!({ "status": "unknown" }));
};
let lnd_status = p.get("status").and_then(|v| v.as_str()).unwrap_or("");
let status = match lnd_status {
"SUCCEEDED" => "succeeded",
"FAILED" => "failed",
_ => "in_flight",
};
let failure_reason = match p
.get("failure_reason")
.and_then(|v| v.as_str())
.unwrap_or("")
{
"FAILURE_REASON_NO_ROUTE" => "No route to the recipient",
"FAILURE_REASON_INSUFFICIENT_BALANCE" => "Insufficient channel balance",
"FAILURE_REASON_TIMEOUT" => "Payment timed out in the network",
"FAILURE_REASON_INCORRECT_PAYMENT_DETAILS" => {
"Recipient rejected the payment (wrong details or expired invoice)"
}
"FAILURE_REASON_ERROR" => "Payment failed",
_ => "",
};
fn amt(p: &serde_json::Value, key: &str) -> i64 {
p.get(key)
.and_then(|f| f.as_str())
.and_then(|s| s.parse().ok())
.or_else(|| p.get(key).and_then(|f| f.as_i64()))
.unwrap_or(0)
}
Ok(serde_json::json!({
"status": status,
"failure_reason": failure_reason,
"amount_sats": amt(p, "value_sat"),
"fee_sats": amt(p, "fee_sat"),
}))
}
/// List on-chain transactions from LND.
/// Returns all transactions, with incoming (amount > 0) flagged.
pub(in crate::api::rpc) async fn handle_lnd_gettransactions(

View File

@ -400,6 +400,76 @@ class RPCClient {
})
}
/** Pay a Lightning invoice and resolve it to a REAL terminal state.
*
* The backend waits up to 120s on LND's synchronous pay endpoint; if the
* payment is still routing after that it answers `status: "pending"` with
* the payment hash instead of an error. This helper then polls
* lnd.paymentstatus until LND itself reports succeeded/failed, so callers
* never show "failed" for a payment that is merely slow the bug where a
* settling payment was declared failed and then appeared in history a
* minute later. Returns `pending` only if the payment is STILL in flight
* after the polling window (rare; caller should say "still settling",
* not "failed"). */
async payLightningInvoice(params: {
payment_request: string
amount_sats?: number
}): Promise<{
status: 'succeeded' | 'failed' | 'pending'
payment_hash: string
amount_sats: number
failure_reason?: string
}> {
const res = await this.call<{
status?: string
payment_hash?: string
amount_sats?: number
}>({
method: 'lnd.payinvoice',
params,
// Above the backend's 120s wait so the backend always answers first.
timeout: 130000,
})
const hash = res.payment_hash || ''
const amount = res.amount_sats || 0
// Older backends have no status field — a plain response was a success.
if (res.status !== 'pending') {
return { status: 'succeeded', payment_hash: hash, amount_sats: amount }
}
if (!hash) return { status: 'pending', payment_hash: '', amount_sats: amount }
// Poll to a terminal state: every 3s for up to 2 minutes.
for (let i = 0; i < 40; i++) {
await new Promise((r) => setTimeout(r, 3000))
try {
const st = await this.call<{
status: string
failure_reason?: string
amount_sats?: number
}>({
method: 'lnd.paymentstatus',
params: { payment_hash: hash },
timeout: 15000,
})
if (st.status === 'succeeded') {
return { status: 'succeeded', payment_hash: hash, amount_sats: st.amount_sats || amount }
}
if (st.status === 'failed') {
return {
status: 'failed',
payment_hash: hash,
amount_sats: amount,
failure_reason: st.failure_reason || 'Payment failed',
}
}
} catch {
// Transient poll error — keep trying; only LND decides failure.
}
}
return { status: 'pending', payment_hash: hash, amount_sats: amount }
}
async publishNostrIdentity(): Promise<{ event_id: string; success: number; failed: number }> {
return this.call({
method: 'node.nostr-publish',

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@ -525,10 +525,10 @@ async function approvePayment() {
receipt = { method: 'ecash', token: res.token, amount_sats: res.amount_sats }
} else if (method === 'lightning') {
if (pay.invoice) {
const res = await rpcClient.call<{ payment_hash: string; amount_sats: number }>({
method: 'lnd.payinvoice',
params: { payment_request: pay.invoice },
})
// Tracked to a real terminal state slow routing is not a failure.
const res = await rpcClient.payLightningInvoice({ payment_request: pay.invoice })
if (res.status === 'failed') throw new Error(res.failure_reason || 'Payment failed')
if (res.status === 'pending') throw new Error('Payment is still settling — check your wallet transactions before retrying.')
receipt = { method: 'lightning', payment_hash: res.payment_hash, amount_sats: res.amount_sats }
} else {
// Create and immediately return an invoice for the requester to display

View File

@ -620,11 +620,21 @@ async function send() {
ecashToken.value = res.token
} else if (method === 'lightning') {
if (!dest.value.trim()) { error.value = t('web5.pasteInvoice'); return }
const res = await rpcClient.call<{ payment_hash: string }>({
method: 'lnd.payinvoice',
params: { payment_request: dest.value.trim() },
})
successInfo.value = { amount: paidAmount, methodLabel: 'Paid over Lightning', hash: res.payment_hash }
// Waits out slow multi-hop routing and only reports failure when LND
// itself declares the payment failed never on a timeout.
const res = await rpcClient.payLightningInvoice({ payment_request: dest.value.trim() })
if (res.status === 'failed') {
error.value = res.failure_reason || t('web5.sendFailed')
return
}
successInfo.value = {
amount: paidAmount,
methodLabel: res.status === 'pending' ? 'Payment in flight' : 'Paid over Lightning',
hash: res.payment_hash || undefined,
...(res.status === 'pending'
? { note: 'This payment is taking longer than usual to settle. It will appear in your transactions once it completes.' }
: {}),
}
} else {
if (!dest.value.trim()) { error.value = t('web5.enterBitcoinAddress'); return }
const res = await rpcClient.call<{ txid: string }>({

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@ -701,16 +701,17 @@ async function confirmSend() {
error.value = ''
try {
if (action.value === 'pay-invoice') {
const params: Record<string, unknown> = { payment_request: dest.value }
const params: { payment_request: string; amount_sats?: number } = { payment_request: dest.value }
if (!amountLocked.value && effectiveAmount.value > 0) params.amount_sats = effectiveAmount.value
const res = await rpcClient.call<{ payment_hash: string; amount_sats: number }>({
method: 'lnd.payinvoice',
params,
timeout: 60000,
})
// Waits out slow multi-hop routing and only reports failure when LND
// itself declares the payment failed never on a timeout.
const res = await rpcClient.payLightningInvoice(params)
if (res.status === 'failed') throw new Error(res.failure_reason || 'Payment failed')
successAmount.value = res.amount_sats || effectiveAmount.value
successVerb.value = 'PAID'
successDetail.value = 'Lightning invoice paid'
successVerb.value = res.status === 'pending' ? 'SENDING' : 'PAID'
successDetail.value = res.status === 'pending'
? 'Payment in flight — it will appear in your transactions once it settles'
: 'Lightning invoice paid'
successRef.value = res.payment_hash
} else if (action.value === 'send-onchain') {
const res = await rpcClient.call<{ txid: string }>({

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@ -1320,8 +1320,8 @@ async function payWithInvoice() {
/**
* Pay the seller's invoice straight from THIS node's Lightning wallet, then
* release the file. No QR/polling: lnd.payinvoice only returns once the payment
* settles, so the payment_hash is immediately valid as the download gate token.
* release the file. payLightningInvoice resolves to a real terminal state, so
* on success the payment_hash is immediately valid as the download gate token.
*/
async function payWithLightning() {
const item = payItem.value
@ -1341,14 +1341,15 @@ async function payWithLightning() {
lnError.value = inv?.error || 'The seller could not create an invoice (is its Lightning node running?).'
return
}
// 2. Pay it from our own node. Returns only after settlement.
const pay = await rpcClient.call<{ payment_hash?: string; payment_error?: string }>({
method: 'lnd.payinvoice',
params: { payment_request: inv.bolt11 },
timeout: 120000,
})
if (pay?.payment_error) {
lnError.value = `Payment failed: ${pay.payment_error}`
// 2. Pay it from our own node. Tracked to a REAL terminal state a slow
// multi-hop route resolves via status polling instead of a false failure.
const pay = await rpcClient.payLightningInvoice({ payment_request: inv.bolt11 })
if (pay.status === 'failed') {
lnError.value = `Payment failed: ${pay.failure_reason || 'unknown reason'}`
return
}
if (pay.status === 'pending') {
lnError.value = 'Payment is still settling — this can take a few minutes. Check your wallet transactions before paying again.'
return
}
// 3. Settled pull the file using the payment hash as the gate token.

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@ -291,10 +291,10 @@ async function unifiedSend() {
unifiedSendError.value = t('web5.pasteInvoice')
return
}
const res = await rpcClient.call<{ payment_hash: string; amount_sats: number }>({
method: 'lnd.payinvoice',
params: { payment_request: unifiedSendDest.value.trim() },
})
// Waits out slow multi-hop routing and only reports failure when LND
// itself declares the payment failed never on a timeout.
const res = await rpcClient.payLightningInvoice({ payment_request: unifiedSendDest.value.trim() })
if (res.status === 'failed') throw new Error(res.failure_reason || 'Payment failed')
sendResultHash.value = res.payment_hash
} else {
if (!unifiedSendDest.value.trim()) {