Module bip158

Expand description

BIP158 Compact Block Filters for light clients.

This module implements a structure for compact filters on block data, for use in the BIP 157 light client protocol. The filter construction proposed is an alternative to Bloom filters, as used in BIP 37, that minimizes filter size by using Golomb-Rice coding for compression.

§Example

fn get_script_for_coin(coin: &OutPoint) -> Result<Script, BlockFilterError> {
  // get utxo ...
}

// create a block filter for a block (server side)
let filter = BlockFilter::new_script_filter(&block, get_script_for_coin)?;

// or create a filter from known raw data
let filter = BlockFilter::new(content);

// read and evaluate a filter

let query: Iterator<Item=Script> = // .. some scripts you care about
if filter.match_any(&block_hash, &mut query.map(|s| s.as_bytes())) {
  // get this block
}

Structs§

BitStreamReader
Bitwise stream reader
BitStreamWriter
Bitwise stream writer
BlockFilter
a computed or read block filter
BlockFilterReader
Reads and interpret a block filter
BlockFilterWriter
Compiles and writes a block filter
GCSFilterReader
Golomb-Rice encoded filter reader
GCSFilterWriter
Colomb-Rice encoded filter writer

Enums§

Error
Errors for blockfilter