fuzz: target for tx_ack_rbf

Fuzz the decoding and encoding of tx_ack_rbf.

tests/fuzz/fuzz-wire-tx_ack_rbf.c

@@ -0,0 +1,43 @@
+#include "config.h"
+#include <assert.h>
+#include <ccan/mem/mem.h>
+#include <common/channel_id.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct tx_ack_rbf {
+	struct channel_id channel_id;
+	struct tlv_tx_ack_rbf_tlvs *tlvs;
+};
+
+static void *encode(const tal_t *ctx, const struct tx_ack_rbf *s)
+{
+	return towire_tx_ack_rbf(ctx, &s->channel_id, s->tlvs);
+}
+
+static struct tx_ack_rbf *decode(const tal_t *ctx, const void *p)
+{
+	struct tx_ack_rbf *s = tal(ctx, struct tx_ack_rbf);
+
+	if (fromwire_tx_ack_rbf(s, p, &s->channel_id, &s->tlvs))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct tx_ack_rbf *x, const struct tx_ack_rbf *y)
+{
+	if (!channel_id_eq(&x->channel_id, &y->channel_id))
+		return false;
+
+	assert(x->tlvs && y->tlvs);
+	return memeq(x->tlvs->funding_output_contribution,
+		     tal_bytelen(x->tlvs->funding_output_contribution),
+		     y->tlvs->funding_output_contribution,
+		     tal_bytelen(y->tlvs->funding_output_contribution));
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_TX_ACK_RBF, struct tx_ack_rbf);
+}