fuzz: target for revoke_and_ack

Fuzz the decoding and encoding of revoke_and_ack.

tests/fuzz/fuzz-wire-revoke_and_ack.c

@@ -0,0 +1,40 @@
+#include "config.h"
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct revoke_and_ack {
+	struct channel_id channel_id;
+	struct secret per_commitment_secret;
+	struct pubkey next_per_commitment_point;
+};
+
+static void *encode(const tal_t *ctx, const struct revoke_and_ack *s)
+{
+	return towire_revoke_and_ack(ctx, &s->channel_id,
+				     &s->per_commitment_secret,
+				     &s->next_per_commitment_point);
+}
+
+static struct revoke_and_ack *decode(const tal_t *ctx, const void *p)
+{
+	struct revoke_and_ack *s = tal(ctx, struct revoke_and_ack);
+
+	if (fromwire_revoke_and_ack(p, &s->channel_id,
+				    &s->per_commitment_secret,
+				    &s->next_per_commitment_point))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct revoke_and_ack *x,
+		  const struct revoke_and_ack *y)
+{
+	return memcmp(x, y, sizeof(*x)) == 0;
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_REVOKE_AND_ACK,
+			   struct revoke_and_ack);
+}