Function send_next

openingd/dualopend.c:1083–1125

}

static bool send_next(struct state *state,
		      struct tx_state *tx_state,
		      struct wally_psbt **psbt)
{
	u8 *msg;
	bool finished = false;
	struct wally_psbt *updated_psbt;
	struct psbt_changeset *cs = tx_state->changeset;

	/* First we check our cached changes */
	msg = psbt_changeset_get_next(tmpctx, &state->channel_id, cs);
	if (msg)
		goto sendmsg;

	/* If we don't have any changes cached, go ask Alice for
	 * what changes they've got for us */
	updated_psbt = fetch_psbt_changes(state, tx_state, *psbt);

	/* We should always get a updated psbt back */
	if (!updated_psbt)
		open_err_fatal(state, "%s", "Uncaught error");

	tx_state->changeset = tal_free(tx_state->changeset);
	tx_state->changeset = psbt_get_changeset(tx_state, *psbt, updated_psbt);

	/* We want this old psbt to be cleaned up when the changeset is freed */
	tal_steal(tx_state->changeset, notleak(*psbt));
	*psbt = tal_steal(tx_state, updated_psbt);
	msg = psbt_changeset_get_next(tmpctx, &state->channel_id,
				      tx_state->changeset);
	/*
	 * If there's no more moves, we send tx_complete
	 * and reply that we're finished */
	if (!msg) {
		msg = towire_tx_complete(tmpctx, &state->channel_id);
		finished = true;
	}

sendmsg:
	peer_write(state->pps, msg);

	return !finished;
}

static void init_changeset(struct tx_state *tx_state, struct wally_psbt *psbt)
{