Change Details

Currently, prepare_indexed_txs is doubly inefficient: 1. If different inputs spend different outputs from the same tx, it'll query the tx num of this tx twice 2. It queries tx nums one-by-one, instead of utilizing the optimized batch query gets that RocksDB provides We fix this by adding batch query versions to `LookupColumn` and `TxReader`, and then utilize those in `prepare_indexed_txs`.

Currently, prepare_indexed_txs is doubly inefficient: 1. If two inputs spend two outputs from the same tx, it'll query the tx num of this tx twice 2. It queries tx nums one-by-one, instead of utilizing the optimized batch query gets that RocksDB provides We fix this by adding batch query versions to `LookupColumn` and `TxReader`, and then utilize those in `prepare_indexed_txs`.

Currently, prepare_indexed_txs is doubly inefficient: 1. If differentIf two inputs spend differenttwo outputs from the same tx, it'll query the tx num of this tx twice 2. It queries tx nums one-by-one, instead of utilizing the optimized batch query gets that RocksDB provides We fix this by adding batch query versions to `LookupColumn` and `TxReader`, and then utilize those in `prepare_indexed_txs`.