derive verifying key correctly

Author: Larkooo

Assets/Dojo/Plugins/WebGL/starknet.jslib

@@ -106,6 +106,14 @@ mergeInto(LibraryManager.library, {
     stringToUTF8(compactSig, buffer, bufferSize);
     return buffer;
   },
+  DeriveVerifyingKey: function (pk) {
+    let signingKey = new wasm_bindgen.SigningKey(UTF8ToString(pk));
+    let verifyingKey = wasm_bindgen.VerifyingKey.fromSigningKey(signingKey);
+    let bufferSize = lengthBytesUTF8(verifyingKey) + 1;
+    let buffer = _malloc(bufferSize);
+    stringToUTF8(verifyingKey, buffer, bufferSize);
+    return buffer;
+  },
   NewVerifyingKey: function (vk) {
     let verifyingKey = new wasm_bindgen.VerifyingKey(UTF8ToString(vk));
     let bufferSize = lengthBytesUTF8(verifyingKey) + 1;

Assets/Dojo/Runtime/Starknet/SigningKey.cs

@@ -18,7 +18,7 @@ public VerifyingKey PublicKey
             get
             {
 #if UNITY_WEBGL && !UNITY_EDITOR
-                return new VerifyingKey(StarknetInterop.NewVerifyingKey(new CString(Inner.Hex())));
+                return new VerifyingKey(StarknetInterop.DeriveVerifyingKey(new CString(Inner.Hex())));
 #else
                 return new VerifyingKey(dojo.verifying_key_new(Inner.Inner));
 #endif

Assets/Dojo/Runtime/Starknet/StarknetInterop.cs

@@ -216,6 +216,9 @@ public static Task<bool> WaitForTransactionAsync(IntPtr provider, FieldElement t
         [DllImport("__Internal")]
         public static extern string NewVerifyingKey(CString privateKey);
 
+        [DllImport("__Internal")]
+        public static extern string DeriveVerifyingKey(CString privateKey);
+
         [DllImport("__Internal")]
         public static extern bool Verify(CString publicKey, CString hash, CString r, CString s);