Function bitcoin_blockfilter::init_block_filter_index

pub fn init_block_filter_index(
    filter_type: BlockFilterType,
    n_cache_size: usize,
    memory: Option<bool>,
    wipe: Option<bool>
) -> bool

| Initialize a block filter index for | the given type if one does not already | exist. Returns true if a new index is | created and false if one has already | been initialized. |