Function listinvreqs_done

plugins/offers_inv_hook.c:124–202

}

static struct command_result *listinvreqs_done(struct command *cmd,
					       const char *method,
					       const char *buf,
					       const jsmntok_t *result,
					       struct inv *inv)
{
	const jsmntok_t *arr = json_get_member(buf, result, "invoicerequests");
	const jsmntok_t *activetok;
	bool active;
	struct amount_msat amt;
	struct out_req *req;
	struct sha256 merkle, sighash;

	/* BOLT #12:
	 * A reader of an invoice:
	 *...
	 *   - if the invoice is a response to an `invoice_request`:
	 *     - MUST reject the invoice if all fields in ranges 0 to 159 and 1000000000 to 2999999999 (inclusive) do not exactly match the invoice request.
	 *     - if `offer_issuer_id` is present (invoice_request for an offer):
	 *       - MUST reject the invoice if `invoice_node_id` is not equal to `offer_issuer_id`
	 *     - otherwise, if `offer_paths` is present (invoice_request for an offer without id):
	 *      - MUST reject the invoice if `invoice_node_id` is not equal to the final `blinded_node_id` it sent the invoice request to.
	 *     - otherwise (invoice_request without an offer):
	 *       - MAY reject the invoice if it cannot confirm that `invoice_node_id` is correct, out-of-band.
	 */

	/* Since the invreq_id hashes all fields in those ranges, we know it matches */
	if (arr->size == 0)
		return fail_inv(cmd, inv, "Unknown invoice_request %s",
				fmt_sha256(tmpctx, &inv->invreq_id));

	activetok = json_get_member(buf, arr + 1, "active");
	if (!activetok) {
		return fail_internalerr(cmd, inv,
					"Missing active: %.*s",
					json_tok_full_len(arr),
					json_tok_full(buf, arr));
	}
	json_to_bool(buf, activetok, &active);
	if (!active)
		return fail_inv(cmd, inv, "invoice_request no longer available");

	/* We only save ones without offers to the db! */
	assert(!inv->inv->offer_issuer_id && !inv->inv->offer_paths);

	/* BOLT #12:
	 * - MUST reject the invoice if `signature` is not a valid signature
         *     using `invoice_node_id` as described in [Signature
         *     Calculation](#signature-calculation).
	 */
	if (!inv->inv->signature)
		return fail_inv(cmd, inv, "invoice missing signature");

	merkle_tlv(inv->inv->fields, &merkle);
	sighash_from_merkle("invoice", "signature", &merkle, &sighash);
	if (!check_schnorr_sig(&sighash, &inv->inv->invoice_node_id->pubkey, inv->inv->signature))
		return fail_inv(cmd, inv, "invalid invoice signature");