df: add new config option for v2 opens --require_confirmed_inputs

If set, require peers to only provide confirmed inputs for any v2 open
(both in accepter + opener role)

doc/lightning-listconfigs.7.md

@@ -104,6 +104,7 @@ On success, an object is returned, containing:
 - **tor-service-password** (string, optional): `tor-service-password` field from config or cmdline, if any
 - **dev-allowdustreserve** (boolean, optional): Whether we allow setting dust reserves
 - **announce-addr-dns** (boolean, optional): Whether we put DNS entries into node\_announcement *(added v22.11.1)*
+- **require-confirmed-inputs** (boolean, optional): Request peers to only send confirmed inputs (dual-fund only)
 
 [comment]: # (GENERATE-FROM-SCHEMA-END)
 
@@ -222,4 +223,4 @@ RESOURCES
 
 Main web site: <https://github.com/ElementsProject/lightning>
 
-[comment]: # ( SHA256STAMP:11ff355ba2ee2d5c636cf140f54349a536f3d33554c3ec33fe2a096c0b6fb29c)
+[comment]: # ( SHA256STAMP:581225b26efd84bfa99dc98e7a91e6fae11ef0b11939031d3da07f751f6d8f87)

doc/schemas/listconfigs.schema.json

@@ -308,8 +308,12 @@
     },
     "announce-addr-dns": {
       "type": "boolean",
-      "description": "Whether we put DNS entries into node_announcement",
-      "added": "v22.11.1"
+      "added": "v22.11.1",
+      "description": "Whether we put DNS entries into node_announcement"
+    },
+    "require-confirmed-inputs": {
+      "type": "boolean",
+      "description": "Request peers to only send confirmed inputs (dual-fund only)"
     }
   }
 }

lightningd/lightningd.h

@@ -82,6 +82,9 @@ struct config {
 	 * slight spec incompatibility, but implementations do this
 	 * already. */
 	bool allowdustreserve;
+
+	/* Require peer to send confirmed inputs */
+	bool require_confirmed_inputs;
 };
 
 typedef STRMAP(const char *) alt_subdaemon_map;

lightningd/options.c

@@ -858,6 +858,8 @@ static const struct config testnet_config = {
 	.exp_offers = IFEXPERIMENTAL(true, false),
 
 	.allowdustreserve = false,
+
+	.require_confirmed_inputs = false,
 };
 
 /* aka. "Dude, where's my coins?" */
@@ -927,6 +929,8 @@ static const struct config mainnet_config = {
 	.exp_offers = IFEXPERIMENTAL(true, false),
 
 	.allowdustreserve = false,
+
+	.require_confirmed_inputs = false,
 };
 
 static void check_config(struct lightningd *ld)
@@ -1180,6 +1184,9 @@ static void register_opts(struct lightningd *ld)
 	opt_register_arg("--funding-confirms", opt_set_u32, opt_show_u32,
 			 &ld->config.anchor_confirms,
 			 "Confirmations required for funding transaction");
+	opt_register_arg("--require-confirmed-inputs", opt_set_bool_arg, opt_show_bool,
+			 &ld->config.require_confirmed_inputs,
+			 "Confirmations required for inputs to funding transaction (v2 opens only)");
 	opt_register_arg("--cltv-delta", opt_set_u32, opt_show_u32,
 			 &ld->config.cltv_expiry_delta,
 			 "Number of blocks for cltv_expiry_delta");