fuzz: target for funding_created

Fuzz the decoding and encoding of funding_created.

tests/fuzz/fuzz-wire-funding_created.c

@@ -0,0 +1,47 @@
+#include "config.h"
+#include <stdint.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct funding_created {
+	struct channel_id temporary_channel_id;
+	struct bitcoin_txid funding_txid;
+	secp256k1_ecdsa_signature signature;
+	u16 funding_output_index;
+};
+
+static void *encode(const tal_t *ctx, const struct funding_created *s)
+{
+	return towire_funding_created(ctx, &s->temporary_channel_id,
+				      &s->funding_txid, s->funding_output_index,
+				      &s->signature);
+}
+
+static struct funding_created *decode(const tal_t *ctx, const void *p)
+{
+	struct funding_created *s = tal(ctx, struct funding_created);
+
+	if (fromwire_funding_created(p, &s->temporary_channel_id,
+				     &s->funding_txid, &s->funding_output_index,
+				     &s->signature))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct funding_created *x,
+		  const struct funding_created *y)
+{
+	size_t upto_funding_output_index =
+	    (uintptr_t)&x->funding_output_index - (uintptr_t)x;
+	if (memcmp(x, y, upto_funding_output_index) != 0)
+		return false;
+
+	return x->funding_output_index == y->funding_output_index;
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_FUNDING_CREATED,
+			   struct funding_created);
+}