Convert uint256 to array or reversed array (#1955)

* Add HD Wallet Ethereum address support

* Add dummy FFI file

* Add EVM attribute

* Add EVM context

* Convert uint256 to array or reversed array

* Fix failing test

* Remove now invalid test types from valid data

* Use hex variable in argument to IsHex

Co-authored-by: Mihailo Milenkovic <mihailo.milenkovic84@gmail.com>

* Rename array

Co-authored-by: Mihailo Milenkovic <mihailo.milenkovic84@gmail.com>

* Add missing include

* Minor changes. Skip OP_16 in test.

* Make IsEVMEnabled standalone function

* Move function to cpp file

---------

Co-authored-by: Mihailo Milenkovic <mihailo.milenkovic84@gmail.com>

src/uint256.h

@@ -6,6 +6,7 @@
 #ifndef DEFI_UINT256_H
 #define DEFI_UINT256_H
 
+#include <array>
 #include <assert.h>
 #include <cstring>
 #include <stdexcept>
@@ -52,6 +53,20 @@ class base_blob
     void SetHex(const std::string& str);
     std::string ToString() const;
 
+    [[nodiscard]] std::array<uint8_t, WIDTH> ToArray() const
+    {
+        std::array<uint8_t, WIDTH> array;
+        std::copy(data, data + sizeof(data), array.begin());
+        return array;
+    }
+
+    [[nodiscard]] std::array<uint8_t, WIDTH> ToArrayReversed() const
+    {
+        std::array<uint8_t, WIDTH> reversedArray;
+        std::copy(std::reverse_iterator<const uint8_t*>(data + sizeof(data)), std::reverse_iterator<const uint8_t*>(data), reversedArray.begin());
+        return reversedArray;
+    }
+
     unsigned char* begin()
     {
         return &data[0];