SKALE-2835 add check

SGXWalletServer.cpp

@@ -669,6 +669,12 @@ Json::Value SGXWalletServer::deleteBlsKeyImpl(const std::string& name) {
         if (!checkName(name, "BLS_KEY")) {
             throw SGXException(INVALID_BLS_NAME, "Invalid BLSKey name");
         }
+        std::shared_ptr <std::string> bls_ptr = LevelDB::getLevelDb()->readString(name);
+
+        if (bls_ptr != nullptr) {
+            result["deleted"] = true;
+            return result;
+        }
         LevelDB::getLevelDb()->deleteKey(name);
     } HANDLE_SGX_EXCEPTION(result)
     return result;

stubclient.h

@@ -220,6 +220,18 @@ class StubClient : public jsonrpc::Client
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
 
+        Json::Value deleteBlsKey(const std::string & polyName)
+        {
+            Json::Value p;
+            p["blsKeyName"] = polyName;
+
+            Json::Value result = this->CallMethod("deleteBlsKey",p);
+            if (result.isObject())
+                return result;
+            else
+                throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
+        }
+
 
     ////CSRManagerServer
 

testw.cpp

@@ -574,8 +574,11 @@ TEST_CASE_METHOD(TestFixture, "DKG_BLS test", "[dkg-bls]") {
 
     TestUtils::doDKG(c, 16, 5, ecdsaKeyNames, blsKeyNames, schainID, dkgID);
 
-}
+    for (const auto& name : blsKeyNames) {
+      REQUIRE(c.deleteBlsKey(name)["deleted"] == true);
+    }
 
+}
 
 TEST_CASE_METHOD(TestFixture, "Get ServerStatus", "[get-server-status]") {
     HttpClient client(RPC_ENDPOINT);