protocol: add open-complete.

This is where we expose the revocation preimages for the escape
transactions.

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

test-cli/open-complete.c

@@ -0,0 +1,50 @@
+#include <ccan/crypto/shachain/shachain.h>
+#include <ccan/short_types/short_types.h>
+#include <ccan/tal/tal.h>
+#include <ccan/opt/opt.h>
+#include <ccan/str/hex/hex.h>
+#include <ccan/err/err.h>
+#include <ccan/read_write_all/read_write_all.h>
+#include "lightning.pb-c.h"
+#include "bitcoin/base58.h"
+#include "pkt.h"
+#include "bitcoin/script.h"
+#include "bitcoin/address.h"
+#include "bitcoin/tx.h"
+#include "bitcoin/pubkey.h"
+#include "bitcoin/privkey.h"
+#include "bitcoin/shadouble.h"
+#include "protobuf_convert.h"
+#include <unistd.h>
+#include <time.h>
+
+/* Create message to reveal escape preimage to invalidate our escape txs. */
+int main(int argc, char *argv[])
+{
+	const tal_t *ctx = tal_arr(NULL, char, 0);
+	struct sha256 escape_secret;
+	struct pkt *pkt;
+
+	err_set_progname(argv[0]);
+	opt_register_noarg("--help|-h", opt_usage_and_exit,
+			   "<our-escape-secret>\n"
+			   "A test program to create an open-complete message on stdout.",
+			   "Print this message.");
+
+ 	opt_parse(&argc, argv, opt_log_stderr_exit);
+
+	if (argc != 2)
+		opt_usage_exit_fail("Expected 1 argument");
+
+	if (!hex_decode(argv[1], strlen(argv[1]), &escape_secret,
+			sizeof(escape_secret)))
+		errx(1, "Invalid escape hash '%s' - need 256 hex bits", argv[1]);
+
+	pkt = open_complete_pkt(ctx, &escape_secret);
+
+	if (!write_all(STDOUT_FILENO, pkt, pkt_totlen(pkt)))
+		err(1, "Writing out packet");
+	
+	tal_free(ctx);
+	return 0;
+}