Function set_remote_upfront_shutdown

openingd/openingd.c:287–319

}

static void set_remote_upfront_shutdown(struct state *state,
					u8 *shutdown_scriptpubkey STEALS)
{
	bool anysegwit = feature_negotiated(state->our_features,
					    state->their_features,
					    OPT_SHUTDOWN_ANYSEGWIT);
	bool anchors = feature_negotiated(state->our_features,
					  state->their_features,
					  OPT_ANCHOR_OUTPUTS)
		|| feature_negotiated(state->our_features,
				      state->their_features,
				      OPT_ANCHORS_ZERO_FEE_HTLC_TX);

	/* BOLT #2:
	 *
	 * - MUST include `upfront_shutdown_script` with either a valid
         *   `shutdown_scriptpubkey` as required by `shutdown` `scriptpubkey`,
         *   or a zero-length `shutdown_scriptpubkey` (ie. `0x0000`).
	 */
	/* We turn empty into NULL. */
	if (tal_bytelen(shutdown_scriptpubkey) == 0)
		shutdown_scriptpubkey = tal_free(shutdown_scriptpubkey);

	state->upfront_shutdown_script[REMOTE]
		= tal_steal(state, shutdown_scriptpubkey);

	if (shutdown_scriptpubkey
	    && !valid_shutdown_scriptpubkey(shutdown_scriptpubkey, anysegwit, anchors))
		peer_failed_err(state->pps,
				&state->channel_id,
				"Unacceptable upfront_shutdown_script %s",
				tal_hex(tmpctx, shutdown_scriptpubkey));
}

/* We start the 'open a channel' negotation with the supplied peer, but
 * stop when we get to the part where we need the funding txid */