Type Alias Bip30Index 

pub type Bip30Index = HashMap<[u8; 32], usize, FxBuildHasher>;

BIP30 index: maps coinbase txid → count of unspent outputs. When count > 0, a coinbase with that txid has unspent outputs (BIP30 would reject duplicate). Uses FxHashMap for faster lookups on integer-like keys (#17).

Aliased Type

pub struct Bip30Index { /* private fields */ }