public static OperationRegistry spiralOperations(
      final GasCalculator gasCalculator, final BigInteger chainId) {
    OperationRegistry registry = new OperationRegistry();
    registerIstanbulOperations(registry, gasCalculator, chainId);
    registry.put(new Push0Operation(gasCalculator));
    return registry;
  }
spiral operations' registry.

@param gasCalculator the gas calculator
@param chainId the chain id
@return the operation registry
evm/src/main/java/org/hyperledger/besu/evm/ClassicEVMs.java