ipld-eth-server/pkg/transformers/tend/transformer.go
Elizabeth b0cd852aa3 Flop deal (#39)
*Refactor deal transformer to take in several contract addresses
* Add flop address to deal transformer
2018-09-27 10:12:29 -05:00

89 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 tend
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 TendTransformer struct {
Repository Repository
Fetcher shared.LogFetcher
Converter Converter
Config shared.TransformerConfig
}
type TendTransformerInitializer struct {
Config shared.TransformerConfig
}
func (i TendTransformerInitializer) NewTendTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
converter := NewTendConverter()
fetcher := shared.NewFetcher(blockChain)
repository := NewTendRepository(db)
return TendTransformer{
Fetcher: fetcher,
Repository: repository,
Converter: converter,
Config: i.Config,
}
}
func (t TendTransformer) Execute() error {
config := t.Config
topics := [][]common.Hash{{common.HexToHash(shared.TendFunctionSignature)}}
missingHeaders, err := t.Repository.MissingHeaders(config.StartingBlockNumber, config.EndingBlockNumber)
if err != nil {
log.Println("Error fetching missing headers:", err)
return err
}
log.Printf("Fetching tend event logs for %d headers \n", len(missingHeaders))
for _, header := range missingHeaders {
ethLogs, err := t.Fetcher.FetchLogs(config.ContractAddresses, topics, header.BlockNumber)
if err != nil {
log.Println("Error fetching matching logs:", err)
return err
}
if len(ethLogs) < 1 {
err := t.Repository.MarkHeaderChecked(header.Id)
if err != nil {
return err
}
}
models, err := t.Converter.ToModels(ethLogs)
if err != nil {
log.Println("Error converting logs:", err)
return err
}
err = t.Repository.Create(header.Id, models)
if err != nil {
log.Println("Error persisting tend record:", err)
return err
}
}
return nil
}