SKALE-2977 fix memory leak

ECDSACrypto.cpp

@@ -156,6 +156,11 @@ bool verifyECDSASig(string& pubKeyStr, const char *hashHex, const char *signatur
         return false;
     }
 
+    mpz_clear(msgMpz);
+    signature_free(sig);
+    domain_parameters_clear(curve);
+    point_clear(publicKey);
+
     return true;
 }
 

ServerDataChecker.cpp

@@ -79,7 +79,7 @@ bool checkHex(const string& hex, const uint32_t sizeInBytes){
   mpz_t num;
   mpz_init(num);
 
-  if ( mpz_set_str(num, hex.c_str(), 16) == -1){
+  if (mpz_set_str(num, hex.c_str(), 16) == -1) {
     spdlog::error("key is not hex {}", hex);
     mpz_clear(num);
     return false;