opt_bits: parsing routines for 'bits' == 100 satoshi.

Also fix open-channel usage message.

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

Makefile

@@ -5,7 +5,7 @@ PROTOCC:=protoc-c
 
 PROGRAMS := open-channel open-anchor-scriptsigs leak-anchor-sigs open-commit-sig check-commit-sig check-anchor-scriptsigs get-anchor-depth create-steal-tx
 
-HELPER_OBJS := base58.o lightning.pb-c.o shadouble.o pkt.o bitcoin_script.o permute_tx.o signature.o bitcoin_tx.o bitcoin_address.o anchor.o commit_tx.o pubkey.o
+HELPER_OBJS := base58.o lightning.pb-c.o shadouble.o pkt.o bitcoin_script.o permute_tx.o signature.o bitcoin_tx.o bitcoin_address.o anchor.o commit_tx.o pubkey.o opt_bits.o
 
 CCAN_OBJS := ccan-crypto-sha256.o ccan-crypto-shachain.o ccan-err.o ccan-tal.o ccan-tal-str.o ccan-take.o ccan-list.o ccan-str.o ccan-opt-helpers.o ccan-opt.o ccan-opt-parse.o ccan-opt-usage.o ccan-read_write_all.o ccan-str-hex.o ccan-tal-grab_file.o ccan-noerr.o
 

open-channel.c

@@ -19,28 +19,11 @@
 #include "shadouble.h"
 #include <openssl/ec.h>
 #include <unistd.h>
+#include "opt_bits.h"
 
 /* Bitcoin nodes are allowed to be 2 hours in the future. */ 
 #define LOCKTIME_MIN (2 * 60 * 60)
 
-static char *opt_set_bits(const char *arg, u64 *satoshi)
-{
-	unsigned long long ll;
-	char *ret = opt_set_ulonglongval_si(arg, &ll);
-	if (ret)
-		return ret;
-	*satoshi = ll * 100;
-	if (*satoshi / 100 != ll)
-		return "Invalid number of bits";
-	return NULL;
-}
-
-static void opt_show_bits(char buf[OPT_SHOW_LEN], const u64 *bits)
-{
-	unsigned long long ll = *bits / 100;
-	opt_show_ulonglongval_si(buf, &ll);
-}
-
 static BitcoinInput *parse_anchor_input(const tal_t *ctx, const char *spec)
 {
 	BitcoinInput *in = tal(ctx, BitcoinInput);
@@ -110,7 +93,7 @@ int main(int argc, char *argv[])
 	locktime_seconds = LOCKTIME_MIN + 24 * 60 * 60;
 	
 	opt_register_noarg("--help|-h", opt_usage_and_exit,
-			   "<seed> <amount> <changepubkey> <commitprivkey> <outpubkey> <txid>/<outnum>/<satoshis>/<script-in-hex>...\n"
+			   "<seed> <amount> <changepubkey> <commitprivkey> <outprivkey> <txid>/<outnum>/<satoshis>/<script-in-hex>...\n"
 			   "A test program to output openchannel on stdout.",
 			   "Print this message.");
 	opt_register_arg("--min-anchor-confirms",

opt_bits.c

@@ -0,0 +1,20 @@
+#include "opt_bits.h"
+
+char *opt_set_bits(const char *arg, u64 *satoshi)
+{
+	unsigned long long ll;
+	char *ret = opt_set_ulonglongval_si(arg, &ll);
+	if (ret)
+		return ret;
+	*satoshi = ll * 100;
+	if (*satoshi / 100 != ll)
+		return "Invalid number of bits";
+	return NULL;
+}
+
+void opt_show_bits(char buf[OPT_SHOW_LEN], const u64 *bits)
+{
+	unsigned long long ll = *bits / 100;
+	opt_show_ulonglongval_si(buf, &ll);
+}
+

opt_bits.h

@@ -0,0 +1,9 @@
+#ifndef LIGHTNING_OPT_BITS_H
+#define LIGHTNING_OPT_BITS_H
+#include <ccan/opt/opt.h>
+#include <ccan/short_types/short_types.h>
+
+char *opt_set_bits(const char *arg, u64 *satoshi);
+void opt_show_bits(char buf[OPT_SHOW_LEN], const u64 *bits);
+
+#endif /* LIGHTNING_OPT_BITS_H */