func (db *Overlay) FetchDirectoryBlockHead() (interfaces.IDirectoryBlock, error) {
blk := new(directoryBlock.DirectoryBlock)
block, err := db.FetchChainHeadByChainID(DIRECTORYBLOCK, primitives.NewHash(blk.GetChainID().Bytes()), blk)
if err != nil {
return nil, err
}
if block == nil {
return nil, nil
}
return block.(interfaces.IDirectoryBlock), nil
}
