Enable contractWatcher without prior headerSync
- Previous setup would fail if there were no headers in the db. This makes sense because we need headers that haven't been checked for logs to exist so that we can fetch logs for those headers. But it also prevents us from kicking off the headerSync and contractWatcher processes concurrently. These changes enable kicking off both processes at the same time with the idea that we will have unchecked headers upon transformer execution.
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@ -78,11 +78,10 @@ var _ = Describe("contractWatcher headerSync transformer", func() {
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Expect(c.Address).To(Equal(tusdAddr))
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})
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It("Fails to initialize if first and block cannot be fetched from vDB headers table", func() {
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It("initializes when no headers available in db", func() {
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t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
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err = t.Init()
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(ContainSubstring("no rows in result set"))
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Expect(err).ToNot(HaveOccurred())
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})
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It("Does nothing if nothing if no addresses are configured", func() {
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@ -17,6 +17,7 @@
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package transformer
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import (
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"database/sql"
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"errors"
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"fmt"
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"strings"
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@ -124,7 +125,11 @@ func (tr *Transformer) Init() error {
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// Get first block and most recent block number in the header repo
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firstBlock, retrieveErr := tr.Retriever.RetrieveFirstBlock()
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if retrieveErr != nil {
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return fmt.Errorf("error retrieving first block: %s", retrieveErr.Error())
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if retrieveErr == sql.ErrNoRows {
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firstBlock = 0
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} else {
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return fmt.Errorf("error retrieving first block: %s", retrieveErr.Error())
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}
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}
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// Set to specified range if it falls within the bounds
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@ -17,6 +17,7 @@
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package transformer_test
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import (
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"database/sql"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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@ -101,7 +102,17 @@ var _ = Describe("Transformer", func() {
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Expect(c.Address).To(Equal(fakeAddress))
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})
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It("Fails to initialize if first block cannot be fetched from vDB headers table", func() {
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It("uses first block from config if vDB headers table has no rows", func() {
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blockRetriever := &fakes.MockHeaderSyncBlockRetriever{}
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blockRetriever.FirstBlockErr = sql.ErrNoRows
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t := getFakeTransformer(blockRetriever, &fakes.MockParser{}, &fakes.MockPoller{})
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err := t.Init()
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Expect(err).ToNot(HaveOccurred())
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})
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It("returns error if fetching first block fails for other reason", func() {
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blockRetriever := &fakes.MockHeaderSyncBlockRetriever{}
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blockRetriever.FirstBlockErr = fakes.FakeError
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t := getFakeTransformer(blockRetriever, &fakes.MockParser{}, &fakes.MockPoller{})
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