ipld-eth-server/pkg/transformers/drip_file/vow/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 vow
import (
"github.com/ethereum/go-ethereum/common"
"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
)
type DripFileVowTransformer struct {
Config shared.TransformerConfig
Converter Converter
Fetcher shared.LogFetcher
Repository Repository
}
func (transformer DripFileVowTransformer) 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.DripFileVowSignature)}}
matchingLogs, err := transformer.Fetcher.FetchLogs(drip_file.DripFileConfig.ContractAddress, topics, header.BlockNumber)
if err != nil {
return err
}
for _, log := range matchingLogs {
model, err := transformer.Converter.ToModel(log)
if err != nil {
return err
}
err = transformer.Repository.Create(header.Id, model)
if err != nil {
return err
}
}
}
return nil
}