@@ -26,6 +26,8 @@ namespace Ethereum.Test.Base
     {
         public Keccak GetBlockhash(BlockHeader currentBlock, in long number)
         {
+            if (number != 0)
+                return Keccak.Zero;
             return Keccak.Compute(number.ToString());
         }
     }
/*
 * Copyright (c) 2021 Demerzel Solutions Limited
 * This file is part of the Nethermind library.
 *
 * The Nethermind library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Nethermind library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Nethermind. If not, see <http://www.gnu.org/licenses/>.
 */

using Nethermind.Core;
using Nethermind.Core.Crypto;
using Nethermind.Evm;

namespace Ethereum.Test.Base
{
    public class TestBlockhashProvider : IBlockhashProvider
    {
        public Keccak GetBlockhash(BlockHeader currentBlock, in long number)
        {
            return Keccak.Compute(number.ToString());
        }
    }
}

shouldn't be number == 0 here?