lightningd: add --dev-allow-shutdown-destination-change to unstick ex…

…isting nodes. This will solve the problem for users who already hit the bug fixed by the previous patch! Signed-off-by: Rusty Russell <[email protected]>
ElementsProject · Feb 14, 2024 · 4c74ff4 · 4c74ff4
1 parent e052c54
commit 4c74ff4
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Showing 7 changed files with 12 additions and 12 deletions.
diff --git a/lightningd/closing_control.c b/lightningd/closing_control.c
@@ -692,7 +692,8 @@ static struct command_result *json_close(struct command *cmd,
 	if (close_to_script) {
 		bool is_p2sh;
 
-		if (!tal_arr_eq(close_to_script, channel->shutdown_scriptpubkey[LOCAL])) {
+		if (!tal_arr_eq(close_to_script, channel->shutdown_scriptpubkey[LOCAL])
+		    && !cmd->ld->dev_allow_shutdown_destination_change) {
 			const u8 *defp2tr, *defp2wpkh;
 			/* We cannot change the closing script once we've
 			 * started shutdown: onchaind relies on it for output

diff --git a/lightningd/lightningd.c b/lightningd/lightningd.c
@@ -146,6 +146,7 @@ static struct lightningd *new_lightningd(const tal_t *ctx)
 	ld->dev_disable_commit = -1;
 	ld->dev_no_ping_timer = false;
 	ld->dev_any_channel_type = false;
+	ld->dev_allow_shutdown_destination_change = false;
 
 	/*~ This is a CCAN list: an embedded double-linked list.  It's not
 	 * really typesafe, but relies on convention to access the contents.

diff --git a/lightningd/lightningd.h b/lightningd/lightningd.h
@@ -343,6 +343,9 @@ struct lightningd {
 	/* Tell openingd/dualopend to accept all, allow sending any. */
 	bool dev_any_channel_type;
 
+	/* Allow changing of shutdown output point even if dangerous */
+	bool dev_allow_shutdown_destination_change;
+
 	/* tor support */
 	struct wireaddr *proxyaddr;
 	bool always_use_proxy;

diff --git a/lightningd/options.c b/lightningd/options.c
@@ -907,6 +907,10 @@ static void dev_register_opts(struct lightningd *ld)
 		     opt_set_bool,
 		     &ld->dev_any_channel_type,
 		     "Allow sending any channel type, and accept any");
+	clnopt_noarg("--dev-allow-shutdown-destination-change", OPT_DEV,
+		     opt_set_bool,
+		     &ld->dev_allow_shutdown_destination_change,
+		     "Allow destination override on close, even if risky");
 }
 
 static const struct config testnet_config = {

diff --git a/openingd/common.c b/openingd/common.c
@@ -188,17 +188,9 @@ bool check_config_bounds(const tal_t *ctx,
 }
 
 u8 *no_upfront_shutdown_script(const tal_t *ctx,
-			       bool developer,
 			       struct feature_set *our_features,
 			       const u8 *their_features)
 {
-	if (developer) {
-		/* This is a hack, for feature testing */
-		const char *e = getenv("DEV_OPENINGD_UPFRONT_SHUTDOWN_SCRIPT");
-		if (e)
-			return tal_hexdata(ctx, e, strlen(e));
-	}
-
 	/* BOLT #2:
 	 *
 	 * - if both nodes advertised the `option_upfront_shutdown_script`

diff --git a/openingd/common.h b/openingd/common.h
@@ -24,7 +24,6 @@ bool anchors_negotiated(struct feature_set *our_features,
 			const u8 *their_features);
 
 u8 *no_upfront_shutdown_script(const tal_t *ctx,
-			       bool developer,
 			       struct feature_set *our_features,
 			       const u8 *their_features);
 

diff --git a/openingd/dualopend.c b/openingd/dualopend.c
@@ -2665,7 +2665,7 @@ static void accepter_start(struct state *state, const u8 *oc2_msg)
 	struct tlv_accept_tlvs *a_tlv = tlv_accept_tlvs_new(tmpctx);
 	if (!state->upfront_shutdown_script[LOCAL])
 		state->upfront_shutdown_script[LOCAL]
-			= no_upfront_shutdown_script(state, state->developer,
+			= no_upfront_shutdown_script(state,
 						     state->our_features,
 						     state->their_features);
 
@@ -3021,7 +3021,7 @@ static void opener_start(struct state *state, u8 *msg)
 
 	if (!state->upfront_shutdown_script[LOCAL])
 		state->upfront_shutdown_script[LOCAL]
-			= no_upfront_shutdown_script(state, state->developer,
+			= no_upfront_shutdown_script(state,
 						     state->our_features,
 						     state->their_features);