You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.3 KiB
56 lines
1.3 KiB
package kv
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
|
|
db "github.com/tendermint/tmlibs/db"
|
|
"github.com/tendermint/go-wire"
|
|
"github.com/tendermint/tendermint/state/txindex"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
// TxIndex is the simplest possible indexer, backed by Key-Value storage (levelDB).
|
|
// It could only index transaction by its identifier.
|
|
type TxIndex struct {
|
|
store db.DB
|
|
}
|
|
|
|
// NewTxIndex returns new instance of TxIndex.
|
|
func NewTxIndex(store db.DB) *TxIndex {
|
|
return &TxIndex{store: store}
|
|
}
|
|
|
|
// Get gets transaction from the TxIndex storage and returns it or nil if the
|
|
// transaction is not found.
|
|
func (txi *TxIndex) Get(hash []byte) (*types.TxResult, error) {
|
|
if len(hash) == 0 {
|
|
return nil, txindex.ErrorEmptyHash
|
|
}
|
|
|
|
rawBytes := txi.store.Get(hash)
|
|
if rawBytes == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
r := bytes.NewReader(rawBytes)
|
|
var n int
|
|
var err error
|
|
txResult := wire.ReadBinary(&types.TxResult{}, r, 0, &n, &err).(*types.TxResult)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Error reading TxResult: %v", err)
|
|
}
|
|
|
|
return txResult, nil
|
|
}
|
|
|
|
// Batch writes a batch of transactions into the TxIndex storage.
|
|
func (txi *TxIndex) AddBatch(b *txindex.Batch) error {
|
|
storeBatch := txi.store.NewBatch()
|
|
for _, result := range b.Ops {
|
|
rawBytes := wire.BinaryBytes(&result)
|
|
storeBatch.Set(result.Tx.Hash(), rawBytes)
|
|
}
|
|
storeBatch.Write()
|
|
return nil
|
|
}
|