Function inputs_sufficient

wallet/reservation.c:234–254

* inputs_sufficient - are we there yet? * @input: total input amount * @amount: required output amount * @feerate_per_kw: feerate we have to pay * @weight: weight of transaction so far. * @diff: (output) set to amount over or under requirements. * * Returns true if inputs >= fees + amount, otherwise false. diff is * the amount over (if returns true) or under (if returns false) */

 * the amount over (if returns true) or under (if returns false)
 */
static bool inputs_sufficient(struct amount_sat input,
			      struct amount_sat amount,
			      u32 feerate_per_kw,
			      size_t weight,
			      struct amount_sat *diff)
{
	struct amount_sat fee;

	fee = amount_tx_fee(feerate_per_kw, weight);

	/* If we can't add fees, amount is huge (e.g. "all") */
	if (!amount_sat_add(&amount, amount, fee))
		return false;

	/* One of these must work! */
	if (amount_sat_sub(diff, input, amount))
		return true;
	if (!amount_sat_sub(diff, amount, input))
		abort();
	return false;
}

struct wally_psbt *psbt_using_utxos(const tal_t *ctx,
				    struct wallet *wallet,