diff options
Diffstat (limited to 'src/ark/lightning.js')
| -rw-r--r-- | src/ark/lightning.js | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/ark/lightning.js b/src/ark/lightning.js index bbfe958..dab2d6d 100644 --- a/src/ark/lightning.js +++ b/src/ark/lightning.js @@ -92,6 +92,19 @@ export function lnSendFee(amountSat, fees, inputs, tip) { export const lnReceiveFee = (amountSat, fees) => (fees.baseFeeSat || 0) + Math.ceil((amountSat * (fees.ppm || 0)) / 1_000_000); +// Ask the quote service what the network will charge to deliver this payment +// (it runs askrene against the ASP's own CLN). The wallet locks +// amount + schedule fee + this on the HTLC and the server hands the whole +// surplus to CLN as the routing budget, so this number is the user's entire +// network cost — 0 between wallets on this ASP and to direct peers. +export async function fetchLnRouteFee(quoteUrl, invoice, amountSat) { + const r = await fetch(`${quoteUrl}?invoice=${encodeURIComponent(invoice)}&amount_msat=${amountSat * 1000}`); + if (!r.ok) throw new Error(`quote failed: ${r.status}`); + const d = await r.json(); + if (d.error) throw new Error(d.error); + return d.feeSat | 0; +} + // --------------------------------------------------------------------------- // pay (HTLC-out) // --------------------------------------------------------------------------- |