revert: keep LeftPad exact-length guard (== size), not >= size

Reverts the accepted suggestion.  returns an oversized array unchanged for value.Length > size, silently handing the rust sign-server a wrong-length key instead of the 32-byte scalar the contract requires — a silent contract violation worse than the BlockCopy throw it avoids. The over-length case is unreachable anyway (secp256k1 scalars are <=32 bytes; the bug this fixes was under-length). Restores the exact-length fast path.

Author: eordano

Explorer/Assets/DCL/Web3/Accounts/RustEthereumAccount.cs

@@ -34,7 +34,7 @@ public RustEthereumAccount(EthECKey key)
 
         private static byte[] LeftPad(byte[] value, int size)
         {
-            if (value.Length >= size)
+            if (value.Length == size)
                 return value;
 
             // Fresh array: the input is cached inside EthECKey and must not be mutated.