daemon: config file support.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/lightningd.h

@@ -3,10 +3,32 @@
 #include "config.h"
 #include "bitcoin/pubkey.h"
 #include <ccan/list/list.h>
+#include <ccan/short_types/short_types.h>
 #include <ccan/timer/timer.h>
 #include <secp256k1.h>
 #include <stdio.h>
 
+/* Various adjustable things. */
+struct config {
+	/* How long do we want them to lock up their funds? (seconds) */
+	u32 rel_locktime;
+
+	/* How long do we let them lock up our funds? (seconds) */
+	u32 rel_locktime_max;
+
+	/* How many confirms until we consider an anchor "settled". */
+	u32 anchor_confirms;
+
+	/* How long will we accept them waiting? */
+	u32 anchor_confirms_max;
+
+	/* What are we prepared to pay in commitment fee (satoshis). */
+	u64 commitment_fee;
+
+	/* How little are we prepared to have them pay? */
+	u64 commitment_fee_min;
+};
+
 /* Here's where the global variables hide! */
 struct lightningd_state {
 	/* Where all our logging goes. */ 
@@ -18,6 +40,9 @@ struct lightningd_state {
 	char *config_dir;
 	char *rpc_filename;
 
+	/* Configuration settings. */
+	struct config config;
+
 	/* Any pending timers. */
 	struct timers timers;