diff --git a/include/opendht/dht.h b/include/opendht/dht.h
index 061e2219..8d423078 100644
--- a/include/opendht/dht.h
+++ b/include/opendht/dht.h
@@ -61,9 +61,6 @@ struct LocalListener;
  */
 class OPENDHT_PUBLIC Dht final : public DhtInterface {
 public:
-
-    Dht();
-
     /**
      * Initialise the Dht with two open sockets (for IPv4 and IP6)
      * and an ID for the node.
diff --git a/include/opendht/infohash.h b/include/opendht/infohash.h
index bf61483a..f95728e4 100644
--- a/include/opendht/infohash.h
+++ b/include/opendht/infohash.h
@@ -54,9 +54,9 @@ namespace crypto {
 }
 
 /**
- * Represents an InfoHash.
- * An InfoHash is a byte array of HASH_LEN bytes.
- * InfoHashes identify nodes and values in the Dht.
+ * Represents an Hash,
+ * a byte array of N bytes.
+ * Hashes identify nodes and values in the Dht.
  */
 template <size_t N>
 class OPENDHT_PUBLIC Hash {
@@ -93,6 +93,8 @@ public:
     iterator end() { return data_.end(); }
     const_iterator cend() const { return data_.cend(); }
 
+    static constexpr inline Hash zero() noexcept { return Hash{}; }
+
     bool operator==(const Hash& h) const {
         auto a = reinterpret_cast<const uint32_t*>(data_.data());
         auto b = reinterpret_cast<const uint32_t*>(h.data_.data());
@@ -112,6 +114,14 @@ public:
         return false;
     }
 
+    Hash operator^(const Hash& o) const {
+        Hash result;
+        for(auto i = 0u; i < N; i++) {
+            result[i] = data_[i] ^ o.data_[i];
+        }
+        return result;
+    }
+
     explicit operator bool() const {
         auto a = reinterpret_cast<const uint32_t*>(data_.data());
         auto b = reinterpret_cast<const uint32_t*>(data_.data() + N);
@@ -142,10 +152,6 @@ public:
         return 8 * i + j;
     }
 
-    /**
-     * Forget about the ``XOR-metric''.  An id is just a path from the
-     * root of the tree, so bits are numbered from the start.
-     */
     static inline int cmp(const Hash& id1, const Hash& id2) {
         return std::memcmp(id1.data_.data(), id2.data_.data(), N);
     }
@@ -179,16 +185,12 @@ public:
     int
     xorCmp(const Hash& id1, const Hash& id2) const
     {
-        for(unsigned i = 0; i < N; i++) {
-            uint8_t xor1, xor2;
+        for (unsigned i = 0; i < N; i++) {
             if(id1.data_[i] == id2.data_[i])
                 continue;
-            xor1 = id1.data_[i] ^ data_[i];
-            xor2 = id2.data_[i] ^ data_[i];
-            if(xor1 < xor2)
-                return -1;
-            else
-                return 1;
+            uint8_t xor1 = id1.data_[i] ^ data_[i];
+            uint8_t xor2 = id2.data_[i] ^ data_[i];
+            return (xor1 < xor2) ? -1 : 1;
         }
         return 0;
     }
@@ -246,14 +248,6 @@ public:
     template <size_t M>
     OPENDHT_PUBLIC friend std::istream& operator>> (std::istream& s, Hash<M>& h);
 
-    Hash operator^(const Hash& o) const {
-        Hash result;
-        for(auto i = 0u; i < N; i++) {
-            result[i] = data_[i] ^ o.data_[i];
-        }
-        return result;
-    }
-
     const char* to_c_str() const;
 
     std::string toString() const;
@@ -398,8 +392,6 @@ Hash<N>::toString() const
     return std::string(to_c_str(), N*2);
 }
 
-const InfoHash zeroes {};
-
 struct OPENDHT_PUBLIC NodeExport {
     InfoHash id;
     sockaddr_storage ss;
diff --git a/include/opendht/network_engine.h b/include/opendht/network_engine.h
index 3523125f..849d2476 100644
--- a/include/opendht/network_engine.h
+++ b/include/opendht/network_engine.h
@@ -214,7 +214,6 @@ public:
     using RequestErrorCb = std::function<bool(const Request&, DhtProtocolException&&)>;
     using RequestExpiredCb = std::function<void(const Request&, bool)>;
 
-    NetworkEngine(const Sp<Logger>& log, std::mt19937_64& rd, Scheduler& scheduler, std::unique_ptr<DatagramSocket>&& sock);
     NetworkEngine(
             InfoHash& myid,
             NetworkConfig config,
@@ -293,7 +292,7 @@ public:
      */
     Sp<Request>
     sendPing(SockAddr&& sa, RequestCb&& on_done, RequestExpiredCb&& on_expired) {
-        return sendPing(std::make_shared<Node>(zeroes, std::move(sa), rd),
+        return sendPing(std::make_shared<Node>(InfoHash::zero(), std::move(sa), rd),
                 std::forward<RequestCb>(on_done),
                 std::forward<RequestExpiredCb>(on_expired));
     }
diff --git a/src/dht.cpp b/src/dht.cpp
index 6de05a35..f5a23263 100644
--- a/src/dht.cpp
+++ b/src/dht.cpp
@@ -1747,8 +1747,6 @@ fromDhtConfig(const Config& config)
     return netConf;
 }
 
-Dht::Dht() : store(), network_engine(logger_, rd, scheduler, {}) {}
-
 Dht::Dht(std::unique_ptr<net::DatagramSocket>&& sock, const Config& config, const Sp<Logger>& l)
     : DhtInterface(l),
     myid(config.node_id ? config.node_id : InfoHash::getRandom(rd)),
diff --git a/src/network_engine.cpp b/src/network_engine.cpp
index fe518da6..90ec1eba 100644
--- a/src/network_engine.cpp
+++ b/src/network_engine.cpp
@@ -82,10 +82,6 @@ RequestAnswer::RequestAnswer(ParsedMessage&& msg)
    nodes6(std::move(msg.nodes6))
 {}
 
-NetworkEngine::NetworkEngine(const Sp<Logger>& log, std::mt19937_64& rand, Scheduler& scheduler, std::unique_ptr<DatagramSocket>&& sock)
-    : myid(zeroes), dht_socket(std::move(sock)), logger_(log), rd(rand), cache(rd), rate_limiter((size_t)-1), scheduler(scheduler)
-{}
-
 NetworkEngine::NetworkEngine(InfoHash& myid, NetworkConfig c,
         std::unique_ptr<DatagramSocket>&& sock,
         const Sp<Logger>& log,
@@ -380,7 +376,7 @@ NetworkEngine::isMartian(const SockAddr& addr)
         const uint8_t* address = (const uint8_t*)&sin6.sin6_addr;
         return address[0] == 0xFF ||
               (address[0] == 0xFE && (address[1] & 0xC0) == 0x80) ||
-               memcmp(address, zeroes.data(), 16) == 0 ||
+               memcmp(address, InfoHash::zero().data(), 16) == 0 ||
                memcmp(address, v4prefix,      12) == 0;
     }
     default: