bitview_query 0.12.0

Query interface for indexed and computed Bitview data
Documentation 
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use brk_error::Error;
use brk_types::{Addr, Height, TxIndex, TxStatus, Utxo, Vout};

use crate::Query;

impl Query {
    pub fn addr_utxos(&self, addr: Addr, max_utxos: usize) -> brk_error::Result<Vec<Utxo>> {
        let _guard = self.read_plugin(self.indexer())?;
        let indexer = self.indexer();
        let stores = indexer.stores();
        let vecs = indexer.vecs();

        let (output_type, type_index) = super::resolve::resolve_addr(self, &addr)?;

        let tx_index_len = self.safe_lengths().tx_index;
        let outpoints: Vec<(TxIndex, Vout)> = stores
            .addr_unspent_outpoints(output_type, type_index)?
            .filter(|(tx_index, _)| *tx_index < tx_index_len)
            .take(max_utxos + 1)
            .collect();
        if outpoints.len() > max_utxos {
            return Err(Error::TooManyUtxos);
        }

        let txid_reader = vecs.transactions.txid.reader();
        let first_txout_index_reader = vecs.transactions.first_txout_index.reader();
        let value_reader = vecs.outputs.value.reader();

        let mut cached_status: Option<(Height, TxStatus)> = None;
        let mut utxos = Vec::with_capacity(outpoints.len());

        for (tx_index, vout) in outpoints {
            let txid = txid_reader.get(tx_index);
            let first_txout_index = first_txout_index_reader.get(tx_index);
            let value = value_reader.get(first_txout_index + vout);

            let height = crate::r#impl::tx::confirmed_status_height(self, tx_index)?;
            let status = if let Some((h, ref s)) = cached_status
                && h == height
            {
                s.clone()
            } else {
                let s = crate::r#impl::tx::confirmed_status_at(self, height)?;
                cached_status = Some((height, s.clone()));
                s
            };

            utxos.push(Utxo {
                txid,
                vout,
                status,
                value,
            });
        }

        Ok(utxos)
    }
}