103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package db
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import (
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"github.com/golang/glog"
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"github.com/juju/errors"
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"spacecruft.org/spacecruft/blockbook/bchain"
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"spacecruft.org/spacecruft/blockbook/bchain/coins/eth"
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"spacecruft.org/spacecruft/blockbook/common"
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)
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// TxCache is handle to TxCacheServer
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type TxCache struct {
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db *RocksDB
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chain bchain.BlockChain
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metrics *common.Metrics
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is *common.InternalState
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enabled bool
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chainType bchain.ChainType
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}
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// NewTxCache creates new TxCache interface and returns its handle
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func NewTxCache(db *RocksDB, chain bchain.BlockChain, metrics *common.Metrics, is *common.InternalState, enabled bool) (*TxCache, error) {
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if !enabled {
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glog.Info("txcache: disabled")
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}
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return &TxCache{
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db: db,
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chain: chain,
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metrics: metrics,
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is: is,
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enabled: enabled,
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chainType: chain.GetChainParser().GetChainType(),
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}, nil
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}
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// GetTransaction returns transaction either from RocksDB or if not present from blockchain
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// it the transaction is confirmed, it is stored in the RocksDB
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func (c *TxCache) GetTransaction(txid string) (*bchain.Tx, int, error) {
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var tx *bchain.Tx
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var h uint32
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var err error
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if c.enabled {
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tx, h, err = c.db.GetTx(txid)
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if err != nil {
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return nil, 0, err
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}
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if tx != nil {
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// number of confirmations is not stored in cache, they change all the time
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_, bestheight, _ := c.is.GetSyncState()
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tx.Confirmations = bestheight - h + 1
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c.metrics.TxCacheEfficiency.With(common.Labels{"status": "hit"}).Inc()
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return tx, int(h), nil
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}
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}
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tx, err = c.chain.GetTransaction(txid)
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if err != nil {
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return nil, 0, err
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}
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c.metrics.TxCacheEfficiency.With(common.Labels{"status": "miss"}).Inc()
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// cache only confirmed transactions
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if tx.Confirmations > 0 {
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if c.chainType == bchain.ChainBitcoinType {
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ta, err := c.db.GetTxAddresses(txid)
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if err != nil {
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return nil, 0, err
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}
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switch {
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case ta == nil:
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// the transaction may not yet be indexed, in that case:
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if tx.BlockHeight > 0 {
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// Check if the tx height value is set.
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h = tx.BlockHeight
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} else {
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// Get the height from the backend's bestblock.
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h, err = c.chain.GetBestBlockHeight()
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if err != nil {
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return nil, 0, err
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}
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}
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default:
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h = ta.Height
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}
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} else if c.chainType == bchain.ChainEthereumType {
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h, err = eth.GetHeightFromTx(tx)
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if err != nil {
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return nil, 0, err
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}
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} else {
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return nil, 0, errors.New("Unknown chain type")
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}
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if c.enabled {
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err = c.db.PutTx(tx, h, tx.Blocktime)
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// do not return caching error, only log it
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if err != nil {
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glog.Warning("PutTx ", tx.Txid, ",error ", err)
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}
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}
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} else {
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return tx, -1, nil
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}
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return tx, int(h), nil
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}
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