package indexer import ( "context" "errors" abci "github.com/tendermint/tendermint/abci/types" "github.com/tendermint/tendermint/libs/pubsub/query" "github.com/tendermint/tendermint/types" ) // TxIndexer interface defines methods to index and search transactions. type TxIndexer interface { // Index analyzes, indexes and stores transactions. For indexing multiple // Transacions must guarantee the Index of the TxResult is in order. // See Batch struct. Index(results []*abci.TxResult) error // Get returns the transaction specified by hash or nil if the transaction is not indexed // or stored. Get(hash []byte) (*abci.TxResult, error) // Search allows you to query for transactions. Search(ctx context.Context, q *query.Query) ([]*abci.TxResult, error) } // BlockIndexer defines an interface contract for indexing block events. type BlockIndexer interface { // Has returns true if the given height has been indexed. An error is returned // upon database query failure. Has(height int64) (bool, error) // Index indexes BeginBlock and EndBlock events for a given block by its height. Index(types.EventDataNewBlockHeader) error // Search performs a query for block heights that match a given BeginBlock // and Endblock event search criteria. Search(ctx context.Context, q *query.Query) ([]int64, error) } // Batch groups together multiple Index operations to be performed at the same time. // NOTE: Batch is NOT thread-safe and must not be modified after starting its execution. type Batch struct { Ops []*abci.TxResult Pending int64 } // NewBatch creates a new Batch. func NewBatch(n int64) *Batch { return &Batch{Ops: make([]*abci.TxResult, n), Pending: n} } // Add or update an entry for the given result.Index. func (b *Batch) Add(result *abci.TxResult) error { if b.Ops[result.Index] == nil { b.Pending-- b.Ops[result.Index] = result } return nil } // Size returns the total number of operations inside the batch. func (b *Batch) Size() int { return len(b.Ops) } // ErrorEmptyHash indicates empty hash var ErrorEmptyHash = errors.New("transaction hash cannot be empty")