ipld-eth-server/pkg/transformers/frob/transformer.go
Rob Mulholand bf44ec614a Log checked headers for MCD events (#43)
* Log checked headers for Bite events

* Log checked headers for Drip drip events

* Log checked headers for Drip file events

- mark headers checked for 3 implementations of file on the Drip contract

* Log checked headers for Frob frob events

* Log checked headers for Pit file events

- mark headers checked for 3 implementations of file on the Pit contract

* Log checked headers for Vat init events
2018-10-02 17:25:38 -05:00

83 lines
2.4 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 frob
import (
"log"
"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 FrobTransformer struct {
Config shared.TransformerConfig
Converter Converter
Fetcher shared.LogFetcher
Repository Repository
}
type FrobTransformerInitializer struct {
Config shared.TransformerConfig
}
func (initializer FrobTransformerInitializer) NewFrobTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
converter := FrobConverter{}
fetcher := shared.NewFetcher(blockChain)
repository := NewFrobRepository(db)
return FrobTransformer{
Config: initializer.Config,
Converter: converter,
Fetcher: fetcher,
Repository: repository,
}
}
func (transformer FrobTransformer) Execute() error {
missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
if err != nil {
return err
}
log.Printf("Fetching frob event logs for %d headers \n", len(missingHeaders))
for _, header := range missingHeaders {
topics := [][]common.Hash{{common.HexToHash(shared.FrobSignature)}}
matchingLogs, err := transformer.Fetcher.FetchLogs(FrobConfig.ContractAddresses, topics, header.BlockNumber)
if err != nil {
return err
}
if len(matchingLogs) < 1 {
err = transformer.Repository.MarkHeaderChecked(header.Id)
if err != nil {
return err
}
}
entities, err := transformer.Converter.ToEntities(FrobConfig.ContractAbi, matchingLogs)
if err != nil {
return err
}
models, err := transformer.Converter.ToModels(entities)
if err != nil {
return err
}
err = transformer.Repository.Create(header.Id, models)
if err != nil {
return err
}
}
return nil
}