jsonrpc: Add mindepth argument to fundchannel and multifundchannel

This will eventually enable us to specify 0 for zeroconf channels.

Changelog-Added: JSON-RPC: Added `mindepth` argument to specify the number of confirmations we require for `fundchannel` and `multifundchannel`

plugins/spender/fundchannel.c

@@ -44,6 +44,7 @@ json_fundchannel(struct command *cmd,
 	const jsmntok_t *close_to;
 	const jsmntok_t *request_amt;
 	const jsmntok_t *compact_lease;
+	const jsmntok_t *mindepth;
 
 	struct out_req *req;
 
@@ -58,6 +59,7 @@ json_fundchannel(struct command *cmd,
 		   p_opt("close_to", param_tok, &close_to),
 		   p_opt("request_amt", param_tok, &request_amt),
 		   p_opt("compact_lease", param_tok, &compact_lease),
+		   p_opt("mindepth", param_tok, &mindepth),
 		   NULL))
 		return command_param_failed();
 
@@ -84,6 +86,10 @@ json_fundchannel(struct command *cmd,
 		json_add_tok(req->js, "request_amt", request_amt, buf);
 		json_add_tok(req->js, "compact_lease", compact_lease, buf);
 	}
+
+	if (mindepth)
+		json_add_tok(req->js, "mindepth", mindepth, buf);
+
 	json_object_end(req->js);
 	json_array_end(req->js);
 	if (feerate)

plugins/spender/multifundchannel.c

@@ -1113,12 +1113,16 @@ fundchannel_start_dest(struct multifundchannel_destination *dest)
 		json_add_string(req->js, "feerate", mfc->cmtmt_feerate_str);
 	else if (mfc->feerate_str)
 		json_add_string(req->js, "feerate", mfc->feerate_str);
+
 	json_add_bool(req->js, "announce", dest->announce);
 	json_add_string(req->js, "push_msat",
 			fmt_amount_msat(tmpctx, dest->push_msat));
 	if (dest->close_to_str)
 		json_add_string(req->js, "close_to", dest->close_to_str);
 
+	if (dest->mindepth)
+		json_add_u32(req->js, "mindepth", *dest->mindepth);
+
 	send_outreq(cmd->plugin, req);
 }
 
@@ -1890,6 +1894,7 @@ param_destinations_array(struct command *cmd, const char *name,
 			   p_opt_def("request_amt", param_sat, &request_amt,
 				     AMOUNT_SAT(0)),
 			   p_opt("compact_lease", param_lease_hex, &rates),
+			   p_opt("mindepth", param_u32, &dest->mindepth),
 			   NULL))
 			return command_param_failed();
 

plugins/spender/multifundchannel.h

@@ -149,6 +149,9 @@ struct multifundchannel_destination {
 
 	/* Channel lease rates that we expect the peer to respond with */
 	struct lease_rates *rates;
+
+	/* Number of blocks to wait before sending `channel_ready`. */
+	u32 *mindepth;
 };