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.
This commit is contained in:
Rob Mulholand 2019-10-04 11:58:44 -05:00
parent f6ab9382b2
commit 2800e6df36
3 changed files with 20 additions and 5 deletions

View File

@ -78,11 +78,10 @@ var _ = Describe("contractWatcher headerSync transformer", func() {
Expect(c.Address).To(Equal(tusdAddr))
})
It("Fails to initialize if first and block cannot be fetched from vDB headers table", func() {
It("initializes when no headers available in db", func() {
t := transformer.NewTransformer(test_helpers.TusdConfig, blockChain, db)
err = t.Init()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("no rows in result set"))
Expect(err).ToNot(HaveOccurred())
})
It("Does nothing if nothing if no addresses are configured", func() {

View File

@ -17,6 +17,7 @@
package transformer
import (
"database/sql"
"errors"
"fmt"
"strings"
@ -124,8 +125,12 @@ func (tr *Transformer) Init() error {
// Get first block and most recent block number in the header repo
firstBlock, retrieveErr := tr.Retriever.RetrieveFirstBlock()
if retrieveErr != nil {
if retrieveErr == sql.ErrNoRows {
firstBlock = 0
} else {
return fmt.Errorf("error retrieving first block: %s", retrieveErr.Error())
}
}
// Set to specified range if it falls within the bounds
if firstBlock < tr.Config.StartingBlocks[contractAddr] {

View File

@ -17,6 +17,7 @@
package transformer_test
import (
"database/sql"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
@ -101,7 +102,17 @@ var _ = Describe("Transformer", func() {
Expect(c.Address).To(Equal(fakeAddress))
})
It("Fails to initialize if first block cannot be fetched from vDB headers table", func() {
It("uses first block from config if vDB headers table has no rows", func() {
blockRetriever := &fakes.MockHeaderSyncBlockRetriever{}
blockRetriever.FirstBlockErr = sql.ErrNoRows
t := getFakeTransformer(blockRetriever, &fakes.MockParser{}, &fakes.MockPoller{})
err := t.Init()
Expect(err).ToNot(HaveOccurred())
})
It("returns error if fetching first block fails for other reason", func() {
blockRetriever := &fakes.MockHeaderSyncBlockRetriever{}
blockRetriever.FirstBlockErr = fakes.FakeError
t := getFakeTransformer(blockRetriever, &fakes.MockParser{}, &fakes.MockPoller{})