ipld-eth-server/pkg/transformers/cat_file/chop_lump/transformer.go
Rob Mulholand 58f17a24ae Add transformers for Cat file events
- transform logs from 3 implementations of file on the Cat contract
2018-09-27 10:32:08 -05:00

77 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 chop_lump
import (
"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/cat_file"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
)
type CatFileChopLumpTransformerInitializer struct {
Config shared.TransformerConfig
}
func (initializer CatFileChopLumpTransformerInitializer) NewCatFileChopLumpTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
converter := CatFileChopLumpConverter{}
fetcher := shared.NewFetcher(blockChain)
repository := NewCatFileChopLumpRepository(db)
return CatFileChopLumpTransformer{
Config: initializer.Config,
Converter: converter,
Fetcher: fetcher,
Repository: repository,
}
}
type CatFileChopLumpTransformer struct {
Config shared.TransformerConfig
Converter Converter
Fetcher shared.LogFetcher
Repository Repository
}
func (transformer CatFileChopLumpTransformer) Execute() error {
missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
if err != nil {
return err
}
for _, header := range missingHeaders {
topics := [][]common.Hash{{common.HexToHash(shared.CatFileChopLumpSignature)}}
matchingLogs, err := transformer.Fetcher.FetchLogs(cat_file.CatFileConfig.ContractAddresses, topics, header.BlockNumber)
if err != nil {
return err
}
if len(matchingLogs) < 1 {
err = transformer.Repository.MarkHeaderChecked(header.Id)
if err != nil {
return err
}
}
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
}