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57 lines
1.5 KiB
57 lines
1.5 KiB
package txindex
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import (
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"errors"
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"github.com/tendermint/tendermint/types"
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)
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// Indexer interface defines methods to index and search transactions.
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type TxIndexer interface {
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// Batch analyzes, indexes or stores a batch of transactions.
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//
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// NOTE We do not specify Index method for analyzing a single transaction
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// here because it bears heavy perfomance loses. Almost all advanced indexers
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// support batching.
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AddBatch(b *Batch) error
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// Tx returns specified transaction or nil if the transaction is not indexed
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// or stored.
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Get(hash []byte) (*types.TxResult, error)
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}
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//----------------------------------------------------
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// Txs are written as a batch
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// A Batch groups together multiple Index operations you would like performed
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// at the same time. The Batch structure is NOT thread-safe. You should only
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// perform operations on a batch from a single thread at a time. Once batch
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// execution has started, you may not modify it.
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type Batch struct {
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Ops []types.TxResult
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}
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// NewBatch creates a new Batch.
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func NewBatch(n int) *Batch {
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return &Batch{
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Ops: make([]types.TxResult, n),
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}
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}
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// Index adds or updates entry for the given result.Index.
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func (b *Batch) Add(result types.TxResult) error {
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b.Ops[result.Index] = result
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return nil
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}
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// Size returns the total number of operations inside the batch.
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func (b *Batch) Size() int {
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return len(b.Ops)
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}
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//----------------------------------------------------
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// Errors
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// ErrorEmptyHash indicates empty hash
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var ErrorEmptyHash = errors.New("Transaction hash cannot be empty")
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