Function chan_extra_can_send_

plugins/renepay/chan_extra.c:259–289

Update the knowledge that this (channel,direction) can send x msat.*/

/* Update the knowledge that this (channel,direction) can send x msat.*/
static enum renepay_errorcode
chan_extra_can_send_(struct chan_extra *ce, int dir, struct amount_msat x)
{
	assert(ce);
	assert(dir == 0 || dir == 1);
	enum renepay_errorcode err;

	if (amount_msat_greater(x, ce->capacity))
		return RENEPAY_PRECONDITION_ERROR;

	struct amount_msat known_min, known_max;

	// in case we fail, let's remember the original state
	known_min = ce->half[dir].known_min;
	known_max = ce->half[dir].known_max;

	ce->half[dir].known_min = amount_msat_max(ce->half[dir].known_min, x);
	ce->half[dir].known_max = amount_msat_max(ce->half[dir].known_max, x);

	err = chan_extra_adjust_half(ce, !dir);
	if (err != RENEPAY_NOERROR)
		goto restore_and_fail;

	return RENEPAY_NOERROR;

restore_and_fail:
	// we fail, thus restore the original state
	ce->half[dir].known_min = known_min;
	ce->half[dir].known_max = known_max;
	return err;
}

enum renepay_errorcode
chan_extra_can_send(struct chan_extra_map *chan_extra_map,