ipld-eth-server/pkg/transformers/vat_fold/transformer.go

80 lines
2.3 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 vat_fold
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 VatFoldTransformerInitializer struct {
Config shared.TransformerConfig
}
func (initializer VatFoldTransformerInitializer) NewVatFoldTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
converter := VatFoldConverter{}
fetcher := shared.NewFetcher(blockChain)
repository := NewVatFoldRepository(db)
return VatFoldTransformer{
Config: initializer.Config,
Converter: converter,
Fetcher: fetcher,
Repository: repository,
}
}
type VatFoldTransformer struct {
Config shared.TransformerConfig
Converter Converter
Fetcher shared.LogFetcher
Repository Repository
}
func (transformer VatFoldTransformer) Execute() error {
missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
if err != nil {
return err
}
log.Printf("Fetching vat fold event logs for %d headers \n", len(missingHeaders))
for _, header := range missingHeaders {
topics := [][]common.Hash{{common.HexToHash(shared.VatFoldSignature)}}
matchingLogs, err := transformer.Fetcher.FetchLogs(VatFoldConfig.ContractAddresses, topics, header.BlockNumber)
if err != nil {
return err
}
if len(matchingLogs) < 1 {
err = transformer.Repository.MarkHeaderChecked(header.Id)
if err != nil {
return err
}
continue
}
models, err := transformer.Converter.ToModels(matchingLogs)
if err != nil {
return err
}
err = transformer.Repository.Create(header.Id, models)
if err != nil {
return err
}
}
return nil
}