From 07d593a24e04788176a1ca439e7ca8c248ff6d0e Mon Sep 17 00:00:00 2001
From: Matt Morehouse <mattmorehouse@gmail.com>
Date: Mon, 21 Aug 2023 15:49:06 -0500
Subject: [PATCH] fuzz: target for node_announcement

Fuzz the decoding and encoding of node_announcement.
---
 tests/fuzz/fuzz-wire-node_announcement.c | 84 ++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 tests/fuzz/fuzz-wire-node_announcement.c

diff --git a/tests/fuzz/fuzz-wire-node_announcement.c b/tests/fuzz/fuzz-wire-node_announcement.c
new file mode 100644
index 000000000..e041aad7f
--- /dev/null
+++ b/tests/fuzz/fuzz-wire-node_announcement.c
@@ -0,0 +1,84 @@
+#include "config.h"
+#include <assert.h>
+#include <ccan/mem/mem.h>
+#include <common/node_id.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct node_announcement {
+	secp256k1_ecdsa_signature signature;
+	u8 *features;
+	u32 timestamp;
+	struct node_id node_id;
+	u8 rgb_color[3];
+	u8 alias[32];
+	u8 *addresses;
+	struct tlv_node_ann_tlvs *tlvs;
+};
+
+static void *encode(const tal_t *ctx, const struct node_announcement *s)
+{
+	return towire_node_announcement(ctx, &s->signature, s->features,
+					s->timestamp, &s->node_id, s->rgb_color,
+					s->alias, s->addresses, s->tlvs);
+}
+
+static struct node_announcement *decode(const tal_t *ctx, const void *p)
+{
+	struct node_announcement *s = tal(ctx, struct node_announcement);
+
+	if (fromwire_node_announcement(s, p, &s->signature, &s->features,
+				       &s->timestamp, &s->node_id, s->rgb_color,
+				       s->alias, &s->addresses, &s->tlvs))
+		return s;
+	return tal_free(s);
+}
+
+static bool lease_rates_equal(const struct lease_rates *x,
+			      const struct lease_rates *y)
+{
+	if (!x && !y)
+		return true;
+	if (!x || !y)
+		return false;
+
+	return x->funding_weight == y->funding_weight &&
+	       x->lease_fee_basis == y->lease_fee_basis &&
+	       x->channel_fee_max_proportional_thousandths ==
+		   y->channel_fee_max_proportional_thousandths &&
+	       x->lease_fee_base_sat == y->lease_fee_base_sat &&
+	       x->channel_fee_max_base_msat == y->channel_fee_max_base_msat;
+}
+
+static bool equal(const struct node_announcement *x,
+		  const struct node_announcement *y)
+{
+	if (memcmp(&x->signature, &y->signature, sizeof(x->signature)) != 0)
+		return false;
+	if (!memeq(x->features, tal_bytelen(x->features), y->features,
+		   tal_bytelen(y->features)))
+		return false;
+	if (x->timestamp != y->timestamp)
+		return false;
+	if (!node_id_eq(&x->node_id, &y->node_id))
+		return false;
+	if (memcmp(x->rgb_color, y->rgb_color, sizeof(x->rgb_color)) != 0)
+		return false;
+	if (memcmp(x->alias, y->alias, sizeof(x->alias)) != 0)
+		return false;
+	if (!memeq(x->addresses, tal_bytelen(x->addresses), y->addresses,
+		   tal_bytelen(y->addresses)))
+		return false;
+
+	assert(x->tlvs && y->tlvs);
+
+	return lease_rates_equal(x->tlvs->option_will_fund,
+				 y->tlvs->option_will_fund);
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_NODE_ANNOUNCEMENT,
+			   struct node_announcement);
+}