forked from cerc-io/ipld-eth-server
Decouple log extraction from transformer delegation
- limit missing headers results set to 100 so that extraction doesn't excessively block delegation - wrap checked headers functions in repository struct - move storage repository to factory, to correspond with event repository path - remove unused files - reformat sql - remove line breaks in imports
This commit is contained in:
Rob Mulholand
@@ -17,141 +17,67 @@
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package watcher
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import (
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"fmt"
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"github.com/vulcanize/vulcanizedb/libraries/shared/transactions"
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"github.com/ethereum/go-ethereum/common"
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"github.com/sirupsen/logrus"
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"github.com/vulcanize/vulcanizedb/libraries/shared/chunker"
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"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
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"github.com/vulcanize/vulcanizedb/libraries/shared/fetcher"
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"github.com/vulcanize/vulcanizedb/libraries/shared/repository"
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"github.com/vulcanize/vulcanizedb/libraries/shared/logs"
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"github.com/vulcanize/vulcanizedb/libraries/shared/transactions"
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"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
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)
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type EventWatcher struct {
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Transformers []transformer.EventTransformer
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BlockChain core.BlockChain
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DB *postgres.DB
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Fetcher fetcher.ILogFetcher
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Chunker chunker.Chunker
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Addresses []common.Address
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Topics []common.Hash
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StartingBlock *int64
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Syncer transactions.ITransactionsSyncer
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blockChain core.BlockChain
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db *postgres.DB
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LogDelegator logs.ILogDelegator
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LogExtractor logs.ILogExtractor
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}
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func NewEventWatcher(db *postgres.DB, bc core.BlockChain) EventWatcher {
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logChunker := chunker.NewLogChunker()
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logFetcher := fetcher.NewLogFetcher(bc)
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transactionSyncer := transactions.NewTransactionsSyncer(db, bc)
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extractor := &logs.LogExtractor{
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Fetcher: fetcher.NewLogFetcher(bc),
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CheckedHeadersRepository: repositories.NewCheckedHeadersRepository(db),
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LogRepository: repositories.NewHeaderSyncLogRepository(db),
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Syncer: transactions.NewTransactionsSyncer(db, bc),
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}
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logTransformer := &logs.LogDelegator{
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Chunker: chunker.NewLogChunker(),
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LogRepository: repositories.NewHeaderSyncLogRepository(db),
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}
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return EventWatcher{
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BlockChain: bc,
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DB: db,
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Fetcher: logFetcher,
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Chunker: logChunker,
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Syncer: transactionSyncer,
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blockChain: bc,
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db: db,
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LogExtractor: extractor,
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LogDelegator: logTransformer,
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}
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}
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// Adds transformers to the watcher and updates the chunker, so that it will consider the new transformers.
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// Adds transformers to the watcher so that their logs will be extracted and delegated.
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func (watcher *EventWatcher) AddTransformers(initializers []transformer.EventTransformerInitializer) {
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var contractAddresses []common.Address
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var topic0s []common.Hash
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var configs []transformer.EventTransformerConfig
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for _, initializer := range initializers {
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t := initializer(watcher.DB)
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watcher.Transformers = append(watcher.Transformers, t)
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t := initializer(watcher.db)
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config := t.GetConfig()
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configs = append(configs, config)
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if watcher.StartingBlock == nil {
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watcher.StartingBlock = &config.StartingBlockNumber
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} else if earlierStartingBlockNumber(config.StartingBlockNumber, *watcher.StartingBlock) {
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watcher.StartingBlock = &config.StartingBlockNumber
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}
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addresses := transformer.HexStringsToAddresses(config.ContractAddresses)
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contractAddresses = append(contractAddresses, addresses...)
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topic0s = append(topic0s, common.HexToHash(config.Topic))
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watcher.LogDelegator.AddTransformer(t)
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watcher.LogExtractor.AddTransformerConfig(t.GetConfig())
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}
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watcher.Addresses = append(watcher.Addresses, contractAddresses...)
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watcher.Topics = append(watcher.Topics, topic0s...)
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watcher.Chunker.AddConfigs(configs)
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}
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// Extracts and delegates watched log events.
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func (watcher *EventWatcher) Execute(recheckHeaders constants.TransformerExecution) error {
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if watcher.Transformers == nil {
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return fmt.Errorf("No transformers added to watcher")
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extractErr := watcher.LogExtractor.ExtractLogs(recheckHeaders)
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if extractErr != nil {
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logrus.Errorf("error extracting logs in event watcher: %s", extractErr.Error())
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return extractErr
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}
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checkedColumnNames, err := repository.GetCheckedColumnNames(watcher.DB)
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if err != nil {
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return err
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}
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notCheckedSQL := repository.CreateHeaderCheckedPredicateSQL(checkedColumnNames, recheckHeaders)
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missingHeaders, err := repository.MissingHeaders(*watcher.StartingBlock, -1, watcher.DB, notCheckedSQL)
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if err != nil {
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logrus.Error("Couldn't fetch missing headers in watcher: ", err)
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return err
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delegateErr := watcher.LogDelegator.DelegateLogs()
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if delegateErr != nil {
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logrus.Errorf("error delegating logs in event watcher: %s", delegateErr.Error())
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return delegateErr
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}
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for _, header := range missingHeaders {
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// TODO Extend FetchLogs for doing several blocks at a time
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logs, err := watcher.Fetcher.FetchLogs(watcher.Addresses, watcher.Topics, header)
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if err != nil {
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logrus.WithFields(logrus.Fields{
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"headerId": header.Id,
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"headerHash": header.Hash,
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"blockNumber": header.BlockNumber,
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}).Errorf("Couldn't fetch logs for header: %v", err)
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return err
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}
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transactionsSyncErr := watcher.Syncer.SyncTransactions(header.Id, logs)
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if transactionsSyncErr != nil {
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logrus.Errorf("error syncing transactions: %s", transactionsSyncErr.Error())
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return transactionsSyncErr
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}
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persistedLogs, createLogsErr := repository.CreateLogs(header.Id, logs, watcher.DB)
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if createLogsErr != nil {
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logrus.Errorf("error persisting logs: %s", createLogsErr.Error())
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}
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transformErr := watcher.transformLogs(persistedLogs, header.Id)
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if transformErr != nil {
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logrus.Error("Could not transform logs: ", transformErr)
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return transformErr
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}
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}
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return err
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}
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func (watcher *EventWatcher) transformLogs(logs []core.HeaderSyncLog, headerID int64) error {
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chunkedLogs := watcher.Chunker.ChunkLogs(logs)
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// Can't quit early and mark as checked if there are no logs. If we are running continuousLogSync,
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// not all logs we're interested in might have been fetched.
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for _, t := range watcher.Transformers {
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transformerName := t.GetConfig().TransformerName
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logChunk := chunkedLogs[transformerName]
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err := t.Execute(logChunk, headerID)
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if err != nil {
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logrus.Errorf("%v transformer failed to execute in watcher: %v", transformerName, err)
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return err
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}
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}
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return nil
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}
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func earlierStartingBlockNumber(transformerBlock, watcherBlock int64) bool {
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return transformerBlock < watcherBlock
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}
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@@ -17,239 +17,97 @@
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package watcher_test
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import (
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"errors"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
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"github.com/vulcanize/vulcanizedb/libraries/shared/mocks"
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"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
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"github.com/vulcanize/vulcanizedb/libraries/shared/watcher"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
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"github.com/vulcanize/vulcanizedb/pkg/fakes"
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"github.com/vulcanize/vulcanizedb/test_config"
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)
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var _ = Describe("Watcher", func() {
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It("initialises correctly", func() {
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db := test_config.NewTestDB(core.Node{ID: "testNode"})
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bc := fakes.NewMockBlockChain()
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var _ = Describe("Event Watcher", func() {
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var (
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delegator *mocks.MockLogDelegator
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extractor *mocks.MockLogExtractor
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eventWatcher watcher.EventWatcher
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)
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w := watcher.NewEventWatcher(db, bc)
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Expect(w.DB).To(Equal(db))
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Expect(w.Fetcher).NotTo(BeNil())
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Expect(w.Chunker).NotTo(BeNil())
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BeforeEach(func() {
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delegator = &mocks.MockLogDelegator{}
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extractor = &mocks.MockLogExtractor{}
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eventWatcher = watcher.EventWatcher{
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LogDelegator: delegator,
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LogExtractor: extractor,
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}
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})
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It("adds transformers", func() {
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w := watcher.NewEventWatcher(nil, nil)
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fakeTransformer := &mocks.MockTransformer{}
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fakeTransformer.SetTransformerConfig(mocks.FakeTransformerConfig)
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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Expect(len(w.Transformers)).To(Equal(1))
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Expect(w.Transformers).To(ConsistOf(fakeTransformer))
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Expect(w.Topics).To(Equal([]common.Hash{common.HexToHash("FakeTopic")}))
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Expect(w.Addresses).To(Equal([]common.Address{common.HexToAddress("FakeAddress")}))
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})
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It("adds transformers from multiple sources", func() {
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w := watcher.NewEventWatcher(nil, nil)
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fakeTransformer1 := &mocks.MockTransformer{}
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fakeTransformer1.SetTransformerConfig(mocks.FakeTransformerConfig)
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fakeTransformer2 := &mocks.MockTransformer{}
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fakeTransformer2.SetTransformerConfig(mocks.FakeTransformerConfig)
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer1.FakeTransformerInitializer})
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer2.FakeTransformerInitializer})
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Expect(len(w.Transformers)).To(Equal(2))
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Expect(w.Topics).To(Equal([]common.Hash{common.HexToHash("FakeTopic"),
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common.HexToHash("FakeTopic")}))
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Expect(w.Addresses).To(Equal([]common.Address{common.HexToAddress("FakeAddress"),
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common.HexToAddress("FakeAddress")}))
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})
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It("calculates earliest starting block number", func() {
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fakeTransformer1 := &mocks.MockTransformer{}
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fakeTransformer1.SetTransformerConfig(transformer.EventTransformerConfig{StartingBlockNumber: 5})
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fakeTransformer2 := &mocks.MockTransformer{}
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fakeTransformer2.SetTransformerConfig(transformer.EventTransformerConfig{StartingBlockNumber: 3})
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w := watcher.NewEventWatcher(nil, nil)
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w.AddTransformers([]transformer.EventTransformerInitializer{
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fakeTransformer1.FakeTransformerInitializer,
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fakeTransformer2.FakeTransformerInitializer,
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})
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Expect(*w.StartingBlock).To(Equal(int64(3)))
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})
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It("returns an error when run without transformers", func() {
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w := watcher.NewEventWatcher(nil, nil)
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err := w.Execute(constants.HeaderMissing)
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Expect(err).To(MatchError("No transformers added to watcher"))
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})
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Describe("with missing headers", func() {
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Describe("AddTransformers", func() {
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var (
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db *postgres.DB
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w watcher.EventWatcher
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mockBlockChain fakes.MockBlockChain
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headerRepository repositories.HeaderRepository
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fakeTransformerOne, fakeTransformerTwo *mocks.MockEventTransformer
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)
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BeforeEach(func() {
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db = test_config.NewTestDB(test_config.NewTestNode())
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test_config.CleanTestDB(db)
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mockBlockChain = fakes.MockBlockChain{}
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headerRepository = repositories.NewHeaderRepository(db)
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_, err := headerRepository.CreateOrUpdateHeader(fakes.FakeHeader)
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Expect(err).NotTo(HaveOccurred())
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fakeTransformerOne = &mocks.MockEventTransformer{}
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fakeTransformerOne.SetTransformerConfig(mocks.FakeTransformerConfig)
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fakeTransformerTwo = &mocks.MockEventTransformer{}
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fakeTransformerTwo.SetTransformerConfig(mocks.FakeTransformerConfig)
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initializers := []transformer.EventTransformerInitializer{
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fakeTransformerOne.FakeTransformerInitializer,
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fakeTransformerTwo.FakeTransformerInitializer,
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}
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w = watcher.NewEventWatcher(db, &mockBlockChain)
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eventWatcher.AddTransformers(initializers)
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})
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It("syncs transactions for fetched logs", func() {
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fakeTransformer := &mocks.MockTransformer{}
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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mockTransactionSyncer := &fakes.MockTransactionSyncer{}
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w.Syncer = mockTransactionSyncer
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err := w.Execute(constants.HeaderMissing)
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Expect(err).NotTo(HaveOccurred())
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Expect(mockTransactionSyncer.SyncTransactionsCalled).To(BeTrue())
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It("adds initialized transformer to log delegator", func() {
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expectedTransformers := []transformer.EventTransformer{
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fakeTransformerOne,
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fakeTransformerTwo,
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}
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Expect(delegator.AddedTransformers).To(Equal(expectedTransformers))
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})
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It("returns error if syncing transactions fails", func() {
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fakeTransformer := &mocks.MockTransformer{}
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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mockTransactionSyncer := &fakes.MockTransactionSyncer{}
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mockTransactionSyncer.SyncTransactionsError = fakes.FakeError
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w.Syncer = mockTransactionSyncer
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It("adds transformer config to log extractor", func() {
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expectedConfigs := []transformer.EventTransformerConfig{
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mocks.FakeTransformerConfig,
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mocks.FakeTransformerConfig,
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}
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Expect(extractor.AddedConfigs).To(Equal(expectedConfigs))
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})
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})
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err := w.Execute(constants.HeaderMissing)
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Describe("Execute", func() {
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It("extracts watched logs", func() {
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err := eventWatcher.Execute(constants.HeaderMissing)
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Expect(err).NotTo(HaveOccurred())
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Expect(extractor.ExtractLogsCalled).To(BeTrue())
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})
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It("returns error if extracting logs fails", func() {
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extractor.ExtractLogsError = fakes.FakeError
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err := eventWatcher.Execute(constants.HeaderMissing)
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Expect(err).To(HaveOccurred())
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Expect(err).To(MatchError(fakes.FakeError))
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})
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It("persists fetched logs", func() {
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fakeTransformer := &mocks.MockTransformer{}
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transformerConfig := transformer.EventTransformerConfig{TransformerName: "transformerA",
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ContractAddresses: []string{"0x000000000000000000000000000000000000000A"},
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Topic: "0xA"}
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fakeTransformer.SetTransformerConfig(transformerConfig)
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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log := types.Log{Address: common.HexToAddress("0xA"),
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Topics: []common.Hash{common.HexToHash("0xA")},
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Index: 0,
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}
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mockBlockChain.SetGetEthLogsWithCustomQueryReturnLogs([]types.Log{log})
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err := w.Execute(constants.HeaderMissing)
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It("delegates untransformed logs", func() {
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err := eventWatcher.Execute(constants.HeaderMissing)
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Expect(err).NotTo(HaveOccurred())
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Expect(len(fakeTransformer.PassedLogs)).NotTo(BeZero())
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Expect(fakeTransformer.PassedLogs[0].ID).NotTo(BeZero())
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Expect(fakeTransformer.PassedLogs[0].Log).To(Equal(log))
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Expect(delegator.DelegateCalled).To(BeTrue())
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})
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It("executes each transformer", func() {
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fakeTransformer := &mocks.MockTransformer{}
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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It("returns error if delegating logs fails", func() {
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delegator.DelegateError = fakes.FakeError
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err := w.Execute(constants.HeaderMissing)
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Expect(err).NotTo(HaveOccurred())
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Expect(fakeTransformer.ExecuteWasCalled).To(BeTrue())
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})
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err := eventWatcher.Execute(constants.HeaderMissing)
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It("returns an error if transformer returns an error", func() {
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fakeTransformer := &mocks.MockTransformer{ExecuteError: errors.New("Something bad happened")}
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w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
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err := w.Execute(constants.HeaderMissing)
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Expect(err).To(HaveOccurred())
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Expect(fakeTransformer.ExecuteWasCalled).To(BeFalse())
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})
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It("passes only relevant logs to each transformer", func() {
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transformerA := &mocks.MockTransformer{}
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transformerB := &mocks.MockTransformer{}
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configA := transformer.EventTransformerConfig{TransformerName: "transformerA",
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ContractAddresses: []string{"0x000000000000000000000000000000000000000A"},
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Topic: "0xA"}
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configB := transformer.EventTransformerConfig{TransformerName: "transformerB",
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ContractAddresses: []string{"0x000000000000000000000000000000000000000b"},
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Topic: "0xB"}
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transformerA.SetTransformerConfig(configA)
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transformerB.SetTransformerConfig(configB)
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logA := types.Log{Address: common.HexToAddress("0xA"),
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Topics: []common.Hash{common.HexToHash("0xA")},
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Index: 0,
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}
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logB := types.Log{Address: common.HexToAddress("0xB"),
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Topics: []common.Hash{common.HexToHash("0xB")},
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Index: 1,
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}
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mockBlockChain.SetGetEthLogsWithCustomQueryReturnLogs([]types.Log{logA, logB})
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w = watcher.NewEventWatcher(db, &mockBlockChain)
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w.AddTransformers([]transformer.EventTransformerInitializer{
|
||||
transformerA.FakeTransformerInitializer, transformerB.FakeTransformerInitializer})
|
||||
|
||||
err := w.Execute(constants.HeaderMissing)
|
||||
Expect(err).NotTo(HaveOccurred())
|
||||
Expect(len(transformerA.PassedLogs)).NotTo(BeZero())
|
||||
Expect(transformerA.PassedLogs[0].Log).To(Equal(logA))
|
||||
Expect(len(transformerB.PassedLogs)).NotTo(BeZero())
|
||||
Expect(transformerB.PassedLogs[0].Log).To(Equal(logB))
|
||||
})
|
||||
|
||||
Describe("uses the LogFetcher correctly:", func() {
|
||||
var fakeTransformer mocks.MockTransformer
|
||||
BeforeEach(func() {
|
||||
fakeTransformer = mocks.MockTransformer{}
|
||||
})
|
||||
|
||||
It("fetches logs for added transformers", func() {
|
||||
addresses := []string{"0xA", "0xB"}
|
||||
topic := "0x1"
|
||||
fakeTransformer.SetTransformerConfig(transformer.EventTransformerConfig{
|
||||
Topic: topic, ContractAddresses: addresses})
|
||||
w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
|
||||
|
||||
err := w.Execute(constants.HeaderMissing)
|
||||
Expect(err).NotTo(HaveOccurred())
|
||||
|
||||
fakeHash := common.HexToHash(fakes.FakeHeader.Hash)
|
||||
mockBlockChain.AssertGetEthLogsWithCustomQueryCalledWith(ethereum.FilterQuery{
|
||||
BlockHash: &fakeHash,
|
||||
Addresses: transformer.HexStringsToAddresses(addresses),
|
||||
Topics: [][]common.Hash{{common.HexToHash(topic)}},
|
||||
})
|
||||
})
|
||||
|
||||
It("propagates log fetcher errors", func() {
|
||||
fetcherError := errors.New("FetcherError")
|
||||
mockBlockChain.SetGetEthLogsWithCustomQueryErr(fetcherError)
|
||||
|
||||
w.AddTransformers([]transformer.EventTransformerInitializer{fakeTransformer.FakeTransformerInitializer})
|
||||
err := w.Execute(constants.HeaderMissing)
|
||||
Expect(err).To(MatchError(fetcherError))
|
||||
})
|
||||
Expect(err).To(MatchError(fakes.FakeError))
|
||||
})
|
||||
})
|
||||
})
|
||||
|
||||
Reference in New Issue
Block a user