class Bridge extends PrecompiledContracts.PrecompiledContract {

    public Integer rollbackFederation(Object[] args)
    {
        logger.trace("rollbackFederation");

        return bridgeSupport.voteFederationChange(
                uscTx,
                new ABICallSpec("rollback", new byte[][]{})
        );
    }

    public  Bridge(UscSystemProperties config, UscAddress contractAddress);

}