Function handle_amount_and_recurrence

plugins/offers_invreq_hook.c:704–753

}

static struct command_result *handle_amount_and_recurrence(struct command *cmd,
							   struct invreq *ir,
							   struct amount_msat base_inv_amount)
{
	/* BOLT #12:
	 * - if `invreq_amount` is present:
	 *    - MUST reject the invoice request if `invreq_amount`.`msat` is less than the
	 *      *expected amount*.
	 */
	if (ir->invreq->offer_amount && ir->invreq->invreq_amount) {
		if (amount_msat_less(amount_msat(*ir->invreq->invreq_amount), base_inv_amount)) {
			return fail_invreq(cmd, ir, "Amount must be at least %s",
					   fmt_amount_msat(tmpctx,
							   base_inv_amount));
		}
		/* BOLT #12:
		 *    - MAY reject the invoice request if `invreq_amount`.`msat` greatly exceeds
		 *      the *expected amount*.
		 */
		/* Much == 5? Easier to divide and compare, than multiply. */
		if (amount_msat_greater(amount_msat_div(amount_msat(*ir->invreq->invreq_amount), 5),
					base_inv_amount)) {
			return fail_invreq(cmd, ir, "Amount vastly exceeds %s",
					   fmt_amount_msat(tmpctx,
							   base_inv_amount));
		}
		base_inv_amount = amount_msat(*ir->invreq->invreq_amount);
	}

	/* BOLT #12:
	 * - if `invreq_amount` is present:
	 *   - MUST set `invoice_amount` to `invreq_amount`
	 * - otherwise:
	 *   - MUST set `invoice_amount` to the *expected amount*.
	 */
	/* This may be adjusted by recurrence if proportional_amount set */
	ir->inv->invoice_amount = tal_dup(ir->inv, u64,
					  &base_inv_amount.millisatoshis); /* Raw: wire protocol */

	/* Last of all, we handle recurrence details, which often requires
	 * further lookups. */
	if (ir->inv->invreq_recurrence_counter) {
		return check_previous_invoice(cmd, ir);
	}
	/* We're happy with 2 hours timeout (default): they can always
	 * request another. */

	/* FIXME: Fallbacks? */
	return add_blindedpaths(cmd, ir);
}

static struct command_result *currency_done(struct command *cmd,
					    const char *method,