Strict RLP decoding (#68)

tests/rlp.cpp

@@ -20,11 +20,15 @@ const auto large_input_decoded = std::make_tuple(
     66000u),
   "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod "
   "tempor incididunt ut labore et dolore magna aliqua"s);
-const auto large_input_encoded = rlp::to_byte_string(
+
+const std::string large_input_encoded_s =
   "\xf8\xa5\xda\x8bHello world\x8dSaluton "
   "Mondo\xcd\xc8\xc1\x01\xc2\x02\x03\xc2\xc1\x04\x83\x01\x01\xd0\xb8zLorem "
   "ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod "
-  "tempor incididunt ut labore et dolore magna aliqua");
+  "tempor incididunt ut labore et dolore magna aliqua";
+
+const auto large_input_encoded = std::vector<uint8_t>(
+  large_input_encoded_s.begin(), large_input_encoded_s.end());
 
 TEST_CASE("encode" * doctest::test_suite("rlp"))
 {
@@ -83,6 +87,7 @@ TEST_CASE("decode" * doctest::test_suite("rlp"))
   CHECK(rlp::decode_single<size_t>(rlp::ByteString{0x1}) == 0x1);
   CHECK(rlp::decode_single<size_t>(rlp::ByteString{0x7f}) == 0x7f);
   CHECK(rlp::decode_single<size_t>(rlp::ByteString{0x81, 0x80}) == 0x80);
+  CHECK_THROWS(rlp::decode_single<size_t>(rlp::ByteString{0x81, 0x80, 0x00}));
 
   CHECK(rlp::decode<>(rlp::ByteString{0xc0}) == std::make_tuple());
   CHECK(rlp::decode<std::string>(rlp::ByteString{0x80}) == std::make_tuple(""));
@@ -123,6 +128,8 @@ TEST_CASE("decode" * doctest::test_suite("rlp"))
     rlp::decode<std::tuple<std::tuple<size_t>>>(
       rlp::ByteString{0xc2, 0xc1, 0x80}) ==
     std::make_tuple(std::make_tuple(std::make_tuple(0x0))));
+  CHECK_THROWS(rlp::decode<std::tuple<std::tuple<size_t>>>(
+    rlp::ByteString{0xc2, 0xc1, 0x80, 0x00}));
 
   CHECK(
     rlp::decode_single<