86 lines
2.8 KiB
Go
86 lines
2.8 KiB
Go
// Copyright 2018 Vulcanize
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package factories
|
|
|
|
import (
|
|
log "github.com/sirupsen/logrus"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
|
|
"github.com/vulcanize/vulcanizedb/pkg/core"
|
|
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
|
|
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
|
|
)
|
|
|
|
type LogNoteTransformer struct {
|
|
Config shared.TransformerConfig
|
|
Converter LogNoteConverter
|
|
Repository Repository
|
|
Fetcher shared.SettableLogFetcher
|
|
}
|
|
|
|
func (transformer LogNoteTransformer) NewLogNoteTransformer(db *postgres.DB, bc core.BlockChain) shared.Transformer {
|
|
transformer.Repository.SetDB(db)
|
|
transformer.Fetcher.SetBC(bc)
|
|
return transformer
|
|
}
|
|
|
|
func (transformer LogNoteTransformer) Execute() error {
|
|
transformerName := transformer.Config.TransformerName
|
|
missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
|
|
if err != nil {
|
|
log.Printf("Error fetching missing headers in %v transformer: %v", transformerName, err)
|
|
return err
|
|
}
|
|
|
|
// Grab event signature from transformer config
|
|
// (Double-array structure required for go-ethereum FilterQuery)
|
|
var topic = [][]common.Hash{{common.HexToHash(transformer.Config.Topic)}}
|
|
|
|
log.Printf("Fetching %v event logs for %d headers", transformerName, len(missingHeaders))
|
|
for _, header := range missingHeaders {
|
|
// Fetch the missing logs for a given header
|
|
matchingLogs, err := transformer.Fetcher.FetchLogs(transformer.Config.ContractAddresses, topic, header)
|
|
if err != nil {
|
|
log.Printf("Error fetching matching logs in %v transformer: %v", transformerName, err)
|
|
return err
|
|
}
|
|
|
|
// No matching logs, mark the header as checked for this type of logs
|
|
if len(matchingLogs) < 1 {
|
|
err := transformer.Repository.MarkHeaderChecked(header.Id)
|
|
if err != nil {
|
|
log.Printf("Error marking header as checked in %v: %v", transformerName, err)
|
|
return err
|
|
}
|
|
// Continue with the next header; nothing to persist
|
|
continue
|
|
}
|
|
|
|
models, err := transformer.Converter.ToModels(matchingLogs)
|
|
if err != nil {
|
|
log.Printf("Error converting logs in %v: %v", transformerName, err)
|
|
return err
|
|
}
|
|
|
|
err = transformer.Repository.Create(header.Id, models)
|
|
if err != nil {
|
|
log.Printf("Error persisting %v record: %v", transformerName, err)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|