e7c6bb1ece
- getPaymentHashFromBolt11 (bolt11.ts, dependency-free; matches the BOLT11 spec test vector) + verifyPreimage (sha256(preimage) === payment_hash). - usePayPaymentPointer captures the preimage from NWC/WebLN/melt and returns a PaymentReceipt; PayWithSats.onPaid carries it; stored device-locally so the later confirm step attaches it; publishTrade writes ['proof','lnpreimage',preimage,hash] (and ['proof','deposit',...] for barter). - useTradeReputation verifies and counts it in paymentVerified. - Honest scope: proves PAYMENT, not delivery; money legs only - a pure hardware swap has no invoice, stays attested; a deposit receipt gives barter real cost.
103 lines
4 KiB
TypeScript
103 lines
4 KiB
TypeScript
/**
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* usePayPaymentPointer — pay a seller's payment pointer from whatever wallet the
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* buyer has, mirroring the zap rails: **NWC → WebLN → Cashu melt**.
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*
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* The pointer comes from an accepted marketplace offer (`["payment", value, kind]`):
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* - `lninvoice` / `lnaddress` are payable today;
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* - `creq` (NUT-18 Cashu request) and `clink` are recognized but not payable yet.
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*
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* This NEVER holds funds: it pays the seller's own invoice/address directly.
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* No Nostr event is published here — recording the trade is the existing `31871`
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* attestation flow.
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*/
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import { useCallback, useState } from 'react';
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import type { WebLNProvider } from '@webbtc/webln-types';
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import { useNWC } from '@/hooks/useNWCContext';
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import { useWallet } from '@/hooks/useWallet';
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import { useLightningAddress } from '@/hooks/useLightningAddress';
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import { useCashu } from '@/hooks/wallet/useCashu';
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import { buildReceipt, type PaymentReceipt } from '@/lib/receipts';
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import type { PaymentKind } from '@/hooks/useMarketplaceOffers';
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export interface PayPointerArgs {
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/** The pointer string (BOLT11, Lightning address, `creq1…`, `noffer1…`). */
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pointer: string;
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kind: PaymentKind;
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/** Required to pay a Lightning address (an invoice carries its own amount). */
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amountSats?: number;
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}
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export function usePayPaymentPointer() {
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const { sendPayment } = useNWC();
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const { activeNWC, webln } = useWallet();
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const { getInvoice } = useLightningAddress();
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const { coco, mints } = useCashu();
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const [isPaying, setIsPaying] = useState(false);
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const pay = useCallback(
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async ({ pointer, kind, amountSats }: PayPointerArgs): Promise<PaymentReceipt> => {
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setIsPaying(true);
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try {
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// 1) Resolve the pointer to a BOLT11 invoice.
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let invoice: string;
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if (kind === 'lninvoice') {
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invoice = pointer;
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} else if (kind === 'lnaddress') {
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if (!amountSats || amountSats <= 0) {
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throw new Error('An amount is required to pay a Lightning address.');
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}
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invoice = await getInvoice({ lightningAddress: pointer, amountSats });
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} else if (kind === 'creq') {
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throw new Error(
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'Cashu (creq) requests aren’t supported yet — ask the seller for a Lightning invoice or address.',
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);
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} else {
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throw new Error(
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'That payment code isn’t supported yet — ask the seller for a Lightning invoice or address.',
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);
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}
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// 2) Pay it with the best available rail, capturing the PREIMAGE where the
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// rail returns one — that is the verifiable receipt.
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let preimage: string | undefined;
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if (activeNWC?.connectionString && activeNWC.isConnected) {
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const res = await sendPayment(activeNWC, invoice);
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preimage = res?.preimage;
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} else if (webln) {
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let provider: WebLNProvider = webln;
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if (typeof webln.enable === 'function') {
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const enabled = (await webln.enable()) as WebLNProvider | undefined;
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if (enabled) provider = enabled;
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}
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const res = (await provider.sendPayment(invoice)) as { preimage?: string } | undefined;
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preimage = res?.preimage;
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} else {
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const mint = mints[0];
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if (coco && mint) {
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const quote = await coco.quotes.createMeltQuote(mint.url, invoice);
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const paid = (await coco.quotes.payMeltQuote(mint.url, quote.quote)) as
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| Record<string, unknown>
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| undefined;
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preimage =
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(paid?.payment_preimage as string | undefined) ??
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(paid?.preimage as string | undefined);
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} else {
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throw new Error(
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'No wallet connected. Add a Lightning wallet (NWC) in Settings, connect a WebLN wallet, or top up your Cashu balance.',
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);
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}
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}
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return buildReceipt(invoice, preimage);
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} finally {
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setIsPaying(false);
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}
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},
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[sendPayment, activeNWC, webln, getInvoice, coco, mints],
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);
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return { pay, isPaying };
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}
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