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Add 10-sat fee-reserve buffer to handleWalletPayInvoice melt to fix 'not enough inputs provided for melt' errors

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This commit is contained in:
Laan Tungir
2026-06-30 09:19:30 -04:00
parent 7dcfc7c3e3
commit 4abb4bf33c
2 changed files with 15 additions and 10 deletions
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6
www/js/version.json
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@@ -1,5 +1,5 @@
{
"VERSION": "v0.7.68",
"VERSION_NUMBER": "0.7.68",
"BUILD_DATE": "2026-06-30T13:15:02.809Z"
"VERSION": "v0.7.69",
"VERSION_NUMBER": "0.7.69",
"BUILD_DATE": "2026-06-30T13:19:30.001Z"
}

19
www/ndk-worker.js
View File

@@ -4616,8 +4616,13 @@ async function handleWalletPayInvoice(requestId, invoice, mint, port) {
const meltQuote = await wallet.createMeltQuote(pr);
const quoteAmount = Number(meltQuote?.amount || 0);
const quoteFeeReserve = Number(meltQuote?.fee_reserve || 0);
// The mint's quoted fee_reserve is an estimate; the actual melt fee can be
// slightly higher, causing "not enough inputs provided for melt" errors.
// Add a safety buffer — any overpayment is returned as change proofs.
const FEE_RESERVE_BUFFER_SATS = 10;
const required = quoteAmount + quoteFeeReserve;
log('mint attempt:quote', { mintUrl, quoteAmount, quoteFeeReserve, required });
const sendAmount = required + FEE_RESERVE_BUFFER_SATS;
log('mint attempt:quote', { mintUrl, quoteAmount, quoteFeeReserve, required, sendAmount });
if (!Number.isFinite(required) || required <= 0) {
log('mint attempt:invalid-quote', { mintUrl, required });
@@ -4625,28 +4630,28 @@ async function handleWalletPayInvoice(requestId, invoice, mint, port) {
continue;
}
if (proofBalance < required) {
log('mint attempt:insufficient', { mintUrl, proofBalance, required });
if (proofBalance < sendAmount) {
log('mint attempt:insufficient', { mintUrl, proofBalance, sendAmount });
attemptErrors.push({ mint: mintUrl, message: `Insufficient funds on mint (${proofBalance} sats)` });
continue;
}
const sendResult = await wallet.send(required, proofs);
const sendResult = await wallet.send(sendAmount, proofs);
const keep = Array.isArray(sendResult?.keep) ? sendResult.keep : [];
const sendProofs = Array.isArray(sendResult?.send) ? sendResult.send : [];
log('mint attempt:send-split', { mintUrl, keepCount: keep.length, sendCount: sendProofs.length });
log('mint attempt:send-split', { mintUrl, keepCount: keep.length, sendCount: sendProofs.length, sendAmount });
const meltResult = await wallet.meltProofs(meltQuote, sendProofs);
const change = Array.isArray(meltResult?.change) ? meltResult.change : [];
upsertMintProofs(mintUrl, [...keep, ...change]);
const changeAmount = getProofTotal(change);
const spentAmount = Math.max(0, required - changeAmount);
const spentAmount = Math.max(0, sendAmount - changeAmount);
paidAmountSats = Number.isFinite(quoteAmount) && quoteAmount > 0
? quoteAmount
: spentAmount;
log('mint attempt:success', { mintUrl, paidAmountSats, changeAmount, preimage: meltResult?.preimage || null });
log('mint attempt:success', { mintUrl, paidAmountSats, changeAmount, spentAmount, preimage: meltResult?.preimage || null });
usedMint = mintUrl;
payResult = meltResult;