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package tx
import (
txindexer "github.com/tendermint/tendermint/state/tx/indexer"
"github.com/tendermint/tendermint/types"
)
// Indexer interface defines methods to index and search transactions.
type Indexer interface {
// Batch analyzes, indexes or stores a batch of transactions.
//
// NOTE We do not specify Index method for analyzing a single transaction
// here because it bears heavy perfomance loses. Almost all advanced indexers
// support batching.
Batch(b *txindexer.Batch) error
// Tx returns specified transaction or nil if the transaction is not indexed
// or stored.
Tx(hash []byte) (*types.TxResult, error)
}