fuzz-tests: Make fuzz-bolt12-offer-decode roundrip

tests/fuzz/corpora/fuzz-bolt12-offer-decode/01d91e3edd6c7f285efc423908d7a533a30f2427

@@ -0,0 +1 @@
+lno1pgqzzgrvgphnzutnw9chzut3w9chrem3w9chrruw3ekkuemhn7ff0xy2llllllllllll8llllakhgwtnwajxsdt3vachwctwdq6nvur2wa5xk6ejxeersam9dd4h8lllpyq0llllqqq8zut3

tests/fuzz/corpora/fuzz-bolt12-offer-decode/1d7a94ea55a71a1eba6382ac698c0e0ae0471110

@@ -0,0 +1 @@
+lno1zprqzqqqqfenwm35qgpqysszqgpqvqszqgpqyqszqgpqyqszqgqqyqszqgpqyqszdq3nswfnpgzxjuehwamhgqnrpnqgpp0dlafgq5jj2ff99jwfe56xs

tests/fuzz/corpora/fuzz-bolt12-offer-decode/24d161ff99af0e05b1f93859dbfc07d3529bafbd

@@ -0,0 +1 @@
+lno1zppsyk6tqqqqq6r8weksyqhlllllllllqgpqyqszqt79uqszqgpqyqszqgpqyqszqgp2tfgz5kj6tfd95kjnywt8x3artfd95kj6tf095kjsqqq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/26a240b30e6b30fae285248046cfbf142b49c680

@@ -0,0 +1 @@
+lno1pqqhz9zmtgcxvdngvamx6qszqgpqyqszqgpqyqszqgfqyqszqgpqyqszqgpqyqszqgpqyq3nxuuxxmrjw5crxdmcqyqszqgpqyqssqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszpc

tests/fuzz/corpora/fuzz-bolt12-offer-decode/2a8c32e19535190fe669ceb1b60891f64ce10f93

@@ -0,0 +1 @@
+lno1qgqqsqq2qq8qqyrqqfd45vrxxcqqqqrrqgpqyqszqgpqyqhuqqqqqqqqqqqqyqszqgpqyqszlmlqqqgzqgpxsdmwx3mnwwpkd9ea4lqqqqqqqqqqqrdd4kk6mtdd4kk6mtyujvxfe8yunjwfxufqqxsuq5qqqqq7qqsqyqnsw5

tests/fuzz/corpora/fuzz-bolt12-offer-decode/2bf672191f67a7d46688ea29ab0b99a21f223eb6

@@ -0,0 +1 @@
+lno1pqq0aljpq38sq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/2d709fdda33e4d4d1534904b9743687a119184f2

@@ -0,0 +1 @@
+lno1zz9s9lll8lllllllluvqqqqqllllllgfllllllllllll7qqqqqqqqqqqqtllllllllllllllllllll6pqqpqqqqqqqqqqqqq95qqqqqqdehnqqqqqqqqqqqqqqq05qsqqqqqqqqqqqqqqqqqqqqqjqqqqqqr6qqqqqq8jqqqqqqqqqqqqqqqqqsqqqqqqqqqqqqqqqqqqqqqqqpaqpkkcvrnw9ukkmrvd3kq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/2d8c54d289cf82dc42c33db958fdc0bc02cce8eb

@@ -0,0 +1 @@
+lno1zr8s9lll8lllllllluvqqqqqllllllcfllllllllllll7qqqqqqqqqqqqtllllllllllllllllllll6pqq4syqqqqqqqqqqqqyqqqqqqqqqqzqqqqqqqqqqqqqq05q4u878sqsz3qqqqqqqqqqyqz7swq943gq0eyqp0jqqq85qqqqqq0yqqqqqqqqqqqqqqqqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqq85qqqqgqqqqqqqqqqyqqq7gqqqqqqqqqqqqqqqqzqqqqqqqqqqqxsvnvd5nsqqqqqqqqq7gqqqqqqqqqqqqqqqqzqqqqqqrjw5crxmrwduch5urnw9ukkmrvd3kq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/36e646f95fa99faa1773d327a53152c40470e5e8

@@ -0,0 +1 @@
+lno1lll7llllllll6ecy9v4jk2et9v4jk2et9v4jk2etqs4jk2etgy4jk2lll0ll72et9v4jk2et9v4jksft9v4ll7llllllllll9v4jk2et9v4llllllaq5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9q5zs2pg9qllllllllllllllllllllll7tl7ecylllkcmn0wyu85ut3wyqqqqqqllllllllllllllllllll7u0lllllllcqqqqqpllllllsqqqq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/3fd050d69f84e6aafd81871fecffaa03a90e3ed0

@@ -0,0 +1 @@
+lno1zq7sz6qz8qunx6mnxu9rffdv5kjaeff85kj6tf0llllnwm35wu38xetgwlyuj6gy7c98xdnwxg9qz7swqy68wum9y5qzhjwfe56xs

tests/fuzz/corpora/fuzz-bolt12-offer-decode/5fd6dffd2c0d6741ebd333dae388e2863b0da285

@@ -0,0 +1 @@
+lno1pqq0usgqae8splh7lczy7qq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/65fb94eeeb2b05b2ec338643fbb9863542329ebe

@@ -0,0 +1 @@
+lno1zpzq9lll8lllllllllllllll5mll7psqllllllllllll7qqqqqqqqqqqqg9llllllugygqhllullllllllllllllqgpqyqszqgpqyqszqgp0lfhl4z52329frg

tests/fuzz/corpora/fuzz-bolt12-offer-decode/6b6b13655e8cccb4b684ba9bae2f764f3118b528

@@ -0,0 +1 @@
+lno1qgqqsqq2qq8qqysqrgqsq8q9qqqqq8sqyqpqyur4

tests/fuzz/corpora/fuzz-bolt12-offer-decode/77499dedf938f63535bbb20a286e3ad361f8b731

@@ -0,0 +1 @@
+lno1zppsyk6tqqqqq6r8weksyq30qgpqyqszqgpqyqszqgpqyqszqgp2tfgzqgpqyqk8clrs9fd95kj6tfd95kjsqqhllllllfd9tdd942a290j6hts

tests/fuzz/corpora/fuzz-bolt12-offer-decode/79857aeb0b87437ca595861792659193312561ee

@@ -0,0 +1 @@
+lno1zr8s9lll8lllllllluvqqqqqllllllcfllllllllllll7qqqqqqqqqqqqtllllllllllllllllllll6pqq4syqqqqqqqqqqqqyqqqqqqqqqqzqqqqqqqqqqqqqq05q4u878sqsz3qqqqqqqqqqyqz7swq943gq0eyqp0jqqq85qqqqqq0yqqqqqqqqqqqqqqqqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqq85qqqqqq0yqqqqqqqqqqqqqqqqpqqqqqqqqqqqrgxfkx6fcqqqqqqqqqzs7sqqqqqpusqqqqqqqqqqqqqqqqyqqqqqq8yafsxdkxume30fc8xuteddkxcmrv

tests/fuzz/corpora/fuzz-bolt12-offer-decode/8069339ed3602be15b9a53048a81dbaa00203314

@@ -0,0 +1 @@
+lno1lekxuqn0pgp9k2e3wqp9kwttxg

tests/fuzz/corpora/fuzz-bolt12-offer-decode/8d639bb8f206c67c4a24981686b5a41e994819e7

@@ -0,0 +1 @@
+lno1zgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqngxs6rv6e5wv4nwumhv458wam5wfj8qctc0qm0ajv2xspqyqszqf5rgdpkdv68x2ehwdmk26rhwa68yersv9u8sdh7qq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/999e1b5ce5fbc48a3f108f70d176bee0d848af0f

@@ -0,0 +1 @@
+lno1lekrz26mqfh9k

tests/fuzz/corpora/fuzz-bolt12-offer-decode/9db6f6cac7f0f54ce9a662566cbd8bbeb12e9b0d

@@ -0,0 +1 @@
+lno1zppsrlcztddrqe3kdqpqqqqqqgpq9llllllllllllachrlcdp5xs6rgdqgpqzqqqqqqqqqqqqyqqsqqqdceqqqqzqqrxcmsvduchrl79qqqrzrg

tests/fuzz/corpora/fuzz-bolt12-offer-decode/a397e1a087f33d681522e7bab4dfd5ebd0be03fb

@@ -0,0 +1 @@
+lno1qcqqsqqjqqsqdl07prllllllllllllllllllllllllllllllllllllllllllmlllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll7q86llllllllllllllllt4kxume3pgqsq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/a57fa35f4a002e2e6a9562f1f0146c38f36e0467

@@ -0,0 +1 @@
+lno1qcqpqscztd9sqqqqdpnhvmgzqgpq9lgzqgpqyqj7qgpq9lt8qgpqyqszqgpqyqszqgpqyqsz5kj6tfd95kj6tfd95kj6tfd95kj62k66tgd95kj6lvyqqrsql87nj

tests/fuzz/corpora/fuzz-bolt12-offer-decode/bc12732ce6cc1c9f29516cbe0762e0555c6d68f1

@@ -0,0 +1 @@
+lno1zzcq9lll8lllllllluvqqqqqllllllcfllllllllllll7qqqqqqqqqqqqtllllllllllllllllllllmgduexqqqqqqqqqsgqqgqqqqqqqqqqqqqqqqqqqqqqqqq05qsqqqqqqqqqqqqqqqqqqqqqqqqqqqqr6qqqqqq8jqqqqqqqqqqqqqqqqqsqqqqqqqqzqgpqyqszqgpqr7szqgpqy6ryqgqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqpqyqkyxvurxqm3v4uqqqqqqqq8jutn0fchzut3d4ehz6mvd3k0jmq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/bda6920fa34bcaa19cf0ea6bf868b5dcc2f74c96

@@ -0,0 +1 @@
+lno1zppsrlcztddrqe3kdqpqqqqqqgpqyqszqgpqyqhlllllllcdp5xs6rgdqgpqypcqqqqqqqqqqphryqqqqgqq9lc2pq9q5zq2pg9p5zs2rg9p5zs

tests/fuzz/corpora/fuzz-bolt12-offer-decode/c287dfd986bc688793fd92b0b7ffe7fa5c2dcb44

@@ -0,0 +1 @@
+lno1qcqqsqqjqqsxkvgqsyq0lllll7424252lllsqqqp4gqqp24242qrg

tests/fuzz/corpora/fuzz-bolt12-offer-decode/cb240962e6bb84906630b817441fddae387bf4b1

@@ -0,0 +1 @@
+lno1zqssyc3svcmzg6r8wmllllllllllllcflllllllllllsqqqqqqqqqqqqqrllllllllllllcqqqqqqqqqqqp0lllllas0llllllllllllgyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqgqqqqqqqqqqqqqqqqqqqqqqqqqqqqpaqqqqqqqqqqqqqqqqqqqqqqqzqqqqplcqqqpqqqqqqqqqqqqqqqqqqqqqqrll7z0llllllllllllsqqqqqqqqqqqzllllllmqllllllllllll7sgqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqsqqqqqqqqqqqqqqqqqqqqqqqqqqqqr6qqqqqqqqqqqqqqqqqqqgqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqq84jxcmtvxpskc6phqq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/d33737737fbdda909585ed37de7f21d33e53678b

@@ -0,0 +1 @@
+lno1pqq0usgqae8splnwdll57qq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/de5fb6677fdaca5de578728d4f6276460b46fb72

@@ -0,0 +1 @@
+lno1pfkxu6pew46rx7n4wnzc335ud3hx76r6dp6hgvmgdf6hf3vgc6wvtzxxn3kxummrdquh2apndpa82ax93rrfcmrwda585at5xdmnjmng0f6hf3vgc6wxcmn0dparjat5xd5zv7n4wnzc335uckyrx6r6w46vtzxxnnzc33nrdp585at5

tests/fuzz/corpora/fuzz-bolt12-offer-decode/e2a3afca0acc1b0abf6a59d04efb1e75310698ff

@@ -0,0 +1 @@
+lno1qyqqvqqgqq8qqysqy5qzkqp3qq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/e6b8407aff38bd94ce9fe8036c76b1e0f5a9e289

@@ -0,0 +1 @@
+lno1zpzsyk66xpnrv6r8weksyqszqfjqqqszqgpqyqszzgpqyqszqgpqyqszqgpqyqszqgpqyveh8p3kcun4xqenwwem8vankw6329g4r2z329g4z5232y

tests/fuzz/corpora/fuzz-bolt12-offer-decode/f5eedc02002279fc5278fd3b98d74f0878db523f

@@ -0,0 +1 @@
+lno1lc7h5qpaqq

tests/fuzz/corpora/fuzz-bolt12-offer-decode/f75bb6f78bd99a440a4cd6daf162936c6af13536

@@ -0,0 +1 @@
+lno1pq9qfudt42whplenwdcs

tests/fuzz/fuzz-bolt12-offer-decode.c

@@ -1,4 +1,6 @@
 #include "config.h"
+#include <assert.h>
+#include <ccan/mem/mem.h>
 #include <common/bolt12.h>
 #include <common/utils.h>
 #include <stddef.h>
@@ -7,12 +9,163 @@
 
 const char *bech32_hrp = "lno";
 
+static bool sciddir_or_pubkey_eq(const struct sciddir_or_pubkey *a,
+				 const struct sciddir_or_pubkey *b)
+{
+	if (a->is_pubkey != b->is_pubkey)
+		return false;
+	if (a->is_pubkey)
+		return pubkey_eq(&a->pubkey, &b->pubkey);
+	else
+		return short_channel_id_dir_eq(&a->scidd, &b->scidd);
+}
+
+static bool recurrence_eq(const struct recurrence *a, const struct recurrence *b)
+{
+	return a->time_unit == b->time_unit && a->period == b->period;
+}
+
+static bool recurrence_paywindow_eq(const struct recurrence_paywindow *a,
+                                    const struct recurrence_paywindow *b)
+{
+	return a->seconds_before == b->seconds_before && a->seconds_after == b->seconds_after;
+}
+
+static bool recurrence_base_eq(const struct recurrence_base *a,
+                               const struct recurrence_base *b)
+{
+	return a->basetime == b->basetime && a->proportional_amount == b->proportional_amount;
+}
+
+static bool blinded_path_eq(const struct blinded_path *a,
+                            const struct blinded_path *b)
+{
+	if (!sciddir_or_pubkey_eq(&a->first_node_id, &b->first_node_id))
+		return false;
+	if (!pubkey_eq(&a->first_path_key, &b->first_path_key))
+		return false;
+	if (tal_count(a->path) != tal_count(b->path))
+		return false;
+	for (size_t i = 0; i < tal_count(a->path); i++) {
+		const struct blinded_path_hop *h1 = a->path[i];
+		const struct blinded_path_hop *h2 = b->path[i];
+		if (h1 == h2)
+			continue;
+		if (!h1 || !h2)
+			return false;
+		if (!pubkey_eq(&h1->blinded_node_id, &h2->blinded_node_id))
+			return false;
+		if (tal_bytelen(h1->encrypted_recipient_data) !=
+			tal_bytelen(h2->encrypted_recipient_data))
+			return false;
+		if (memcmp(h1->encrypted_recipient_data, h2->encrypted_recipient_data,
+				tal_bytelen(h1->encrypted_recipient_data)) != 0)
+			return false;
+	}
+	return true;
+}
+
+static bool tlv_offer_eq(const struct tlv_offer *a, const struct tlv_offer *b)
+{
+
+#define PTR_EQ(field, eqfn)							\
+do {										\
+	if (a->field != b->field) {						\
+		if (!a->field || !b->field)					\
+			return false;						\
+		if (!eqfn(a->field, b->field))					\
+			return false;						\
+        }									\
+} while (0)
+
+#define MEM_EQ(field)								\
+do {										\
+	if (a->field != b->field) {						\
+		if (!a->field || !b->field)					\
+			return false;						\
+		if (tal_bytelen(a->field) != tal_bytelen(b->field))		\
+			return false;						\
+		if (memcmp(a->field, b->field, tal_bytelen(a->field)) != 0)	\
+			return false;						\
+        }									\
+} while (0)
+
+#define VAL_EQ(field)								\
+do {										\
+	if (a->field != b->field) {						\
+		if (!a->field || !b->field)					\
+			return false;						\
+		if (*a->field != *b->field)					\
+			return false;						\
+	}									\
+} while (0)
+
+#define ARR_EQ(field, eqfn)							\
+do {										\
+	if (a->field != b->field) {						\
+		if (!a->field || !b->field)					\
+			return false;						\
+		if (tal_count(a->field) != tal_count(b->field))			\
+			return false;						\
+		for (size_t i = 0; i < tal_count(a->field); i++) {		\
+			if (!eqfn(&a->field[i], &b->field[i]))			\
+				return false;					\
+		}								\
+        }									\
+} while (0)
+
+#define PTR_ARR_EQ(field, eqfn)							\
+do {										\
+	if (a->field != b->field) {						\
+		if (!a->field || !b->field)					\
+			return false;						\
+		if (tal_count(a->field) != tal_count(b->field))			\
+			return false;						\
+		for (size_t i = 0; i < tal_count(a->field); i++) {		\
+			if (!eqfn(a->field[i], b->field[i]))			\
+				return false;					\
+		}								\
+	}									\
+} while (0)
+
+	ARR_EQ(offer_chains, bitcoin_blkid_eq);
+	MEM_EQ(offer_metadata);
+	MEM_EQ(offer_currency);
+	VAL_EQ(offer_amount);
+	MEM_EQ(offer_description);
+	MEM_EQ(offer_features);
+	VAL_EQ(offer_absolute_expiry);
+	PTR_ARR_EQ(offer_paths, blinded_path_eq);
+	MEM_EQ(offer_issuer);
+	VAL_EQ(offer_quantity_max);
+	PTR_EQ(offer_issuer_id, pubkey_eq);
+	PTR_EQ(offer_recurrence_compulsory, recurrence_eq);
+	PTR_EQ(offer_recurrence_optional, recurrence_eq);
+	PTR_EQ(offer_recurrence_base, recurrence_base_eq);
+	PTR_EQ(offer_recurrence_paywindow, recurrence_paywindow_eq);
+	VAL_EQ(offer_recurrence_limit);
+
+	return true;
+}
+
 void run(const u8 *data, size_t size)
 {
-	char *fail;
+	struct tlv_offer *offer, *decoded_offer;
+	char *fail = NULL, *encoded_offer;
+
+	offer = offer_decode(tmpctx, (const char *)data, size,
+			/*feature_set=*/NULL, /*must_be_chain=*/NULL, &fail);
+	if (!offer)
+		goto cleanup;
+
+	encoded_offer = offer_encode(tmpctx, offer);
 
-	offer_decode(tmpctx, (const char *)data, size, /*feature_set=*/NULL,
-		     /*must_be_chain=*/NULL, &fail);
+	decoded_offer = offer_decode(tmpctx, encoded_offer, strlen(encoded_offer),
+					NULL, NULL, &fail);
+	assert(!fail);
+	assert(decoded_offer);
+	assert(tlv_offer_eq(offer, decoded_offer));
 
+cleanup:
 	clean_tmpctx();
 }