127 lines
3.8 KiB
Go
127 lines
3.8 KiB
Go
// Copyright 2018 Vulcanize
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package flip_kick
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import (
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"errors"
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"fmt"
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"log"
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"github.com/ethereum/go-ethereum/common"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
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)
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type FlipKickTransformer struct {
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Fetcher shared.LogFetcher
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Converter Converter
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Repository Repository
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Config shared.TransformerConfig
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}
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type FlipKickTransformerInitializer struct {
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Config shared.TransformerConfig
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}
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func (i FlipKickTransformerInitializer) NewFlipKickTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
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fetcher := shared.NewFetcher(blockChain)
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repository := NewFlipKickRepository(db)
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transformer := FlipKickTransformer{
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Fetcher: fetcher,
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Repository: repository,
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Converter: FlipKickConverter{},
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Config: i.Config,
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}
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return transformer
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}
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func (fkt *FlipKickTransformer) SetConfig(config shared.TransformerConfig) {
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fkt.Config = config
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}
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const (
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FetcherError = "Error fetching FlipKick log events for block number %d: %s"
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LogToEntityError = "Error converting eth log to FlipKick entity for block number %d: %s"
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EntityToModelError = "Error converting eth log to FlipKick entity for block number %d: %s"
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RepositoryError = "Error creating flip_kick record for block number %d: %s"
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TransformerError = "There has been %d error(s) transforming FlipKick event logs, see the logs for more details."
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)
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type transformerError struct {
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err string
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blockNumber int64
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msg string
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}
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func (te *transformerError) Error() string {
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return fmt.Sprintf(te.msg, te.blockNumber, te.err)
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}
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func newTransformerError(err error, blockNumber int64, msg string) error {
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e := transformerError{err.Error(), blockNumber, msg}
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log.Println(e.Error())
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return &e
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}
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func (fkt FlipKickTransformer) Execute() error {
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config := fkt.Config
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topics := [][]common.Hash{{common.HexToHash(shared.FlipKickSignature)}}
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headers, err := fkt.Repository.MissingHeaders(config.StartingBlockNumber, config.EndingBlockNumber)
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if err != nil {
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log.Println("Error:", err)
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return err
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}
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log.Printf("Fetching flip kick event logs for %d headers \n", len(headers))
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var resultingErrors []error
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for _, header := range headers {
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ethLogs, err := fkt.Fetcher.FetchLogs(config.ContractAddress, topics, header.BlockNumber)
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if err != nil {
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resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, FetcherError))
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}
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for _, ethLog := range ethLogs {
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entity, err := fkt.Converter.ToEntity(config.ContractAddress, config.ContractAbi, ethLog)
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if err != nil {
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resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, LogToEntityError))
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}
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model, err := fkt.Converter.ToModel(*entity)
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if err != nil {
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resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, EntityToModelError))
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}
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err = fkt.Repository.Create(header.Id, model)
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if err != nil {
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resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, RepositoryError))
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}
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}
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}
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if len(resultingErrors) > 0 {
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for _, err := range resultingErrors {
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log.Println(err)
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}
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msg := fmt.Sprintf(TransformerError, len(resultingErrors))
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return errors.New(msg)
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}
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return nil
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}
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