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

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/*
* 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 bite
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 BiteTransformer struct {
Repository Repository
Fetcher shared.LogFetcher
Converter Converter
Config shared.TransformerConfig
}
type BiteTransformerInitializer struct {
Config shared.TransformerConfig
}
func (i BiteTransformerInitializer) NewBiteTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
fetcher := shared.NewFetcher(blockChain)
repository := NewBiteRepository(db)
transformer := BiteTransformer{
Fetcher: fetcher,
Repository: repository,
Converter: BiteConverter{},
Config: i.Config,
}
return transformer
}
func (b BiteTransformer) Execute() error {
config := b.Config
topics := [][]common.Hash{{common.HexToHash(shared.BiteSignature)}}
missingHeaders, err := b.Repository.MissingHeaders(config.StartingBlockNumber, config.EndingBlockNumber)
if err != nil {
log.Println("Error fetching missing headers:", err)
return err
}
log.Printf("Fetching bite event logs for %d headers \n", len(missingHeaders))
for _, header := range missingHeaders {
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ethLogs, err := b.Fetcher.FetchLogs(config.ContractAddress, topics, header.BlockNumber)
if err != nil {
log.Println("Error fetching matching logs:", err)
return err
}
for _, ethLog := range ethLogs {
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entity, err := b.Converter.ToEntity(config.ContractAddress, config.ContractAbi, ethLog)
model, err := b.Converter.ToModel(entity)
if err != nil {
log.Println("Error converting logs:", err)
return err
}
err = b.Repository.Create(header.Id, model)
if err != nil {
log.Println("Error persisting bite record:", err)
return err
}
}
}
return nil
}
func (b BiteTransformer) SetConfig(config shared.TransformerConfig) {
b.Config = config
}