ipld-eth-server/pkg/transformers/vat_toll/transformer.go
2018-10-09 11:40:35 -05:00

63 lines
1.7 KiB
Go

package vat_toll
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/shared"
"log"
)
type VatTollTransformer struct {
Config shared.TransformerConfig
Converter Converter
Fetcher shared.LogFetcher
Repository Repository
}
type VatTollTransformerInitializer struct {
Config shared.TransformerConfig
}
func (initializer VatTollTransformerInitializer) NewVatTollTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
converter := VatTollConverter{}
fetcher := shared.NewFetcher(blockChain)
repository := NewVatTollRepository(db)
return VatTollTransformer{
Config: initializer.Config,
Converter: converter,
Fetcher: fetcher,
Repository: repository,
}
}
func (transformer VatTollTransformer) Execute() error {
missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
if err != nil {
return err
}
log.Printf("Fetching vat toll event logs for %d headers \n", len(missingHeaders))
for _, header := range missingHeaders {
topics := [][]common.Hash{{common.HexToHash(shared.VatTollSignature)}}
matchingLogs, err := transformer.Fetcher.FetchLogs(VatTollConfig.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
}