78 lines
2.2 KiB
Go
78 lines
2.2 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 price_feeds
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import (
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"log"
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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 PriceFeedTransformerInitializer struct {
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Config IPriceFeedConfig
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}
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func (initializer PriceFeedTransformerInitializer) NewPriceFeedTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
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converter := PriceFeedConverter{}
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fetcher := NewPriceFeedFetcher(blockChain, initializer.Config.ContractAddresses)
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repository := NewPriceFeedRepository(db)
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return PriceFeedTransformer{
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Config: initializer.Config,
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Converter: converter,
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Fetcher: fetcher,
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Repository: repository,
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}
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}
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type PriceFeedTransformer struct {
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Config IPriceFeedConfig
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Converter Converter
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Fetcher IPriceFeedFetcher
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Repository IPriceFeedRepository
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}
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func (transformer PriceFeedTransformer) Execute() error {
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headers, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
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if err != nil {
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return err
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}
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log.Printf("Fetching price feed event logs for %d headers \n", len(headers))
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for _, header := range headers {
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logs, err := transformer.Fetcher.FetchLogValues(header.BlockNumber)
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if err != nil {
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return err
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}
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if len(logs) < 1 {
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err := transformer.Repository.MarkHeaderChecked(header.Id)
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if err != nil {
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return err
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}
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}
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for _, log := range logs {
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model, err := transformer.Converter.ToModel(log, header.Id)
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if err != nil {
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return err
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}
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err = transformer.Repository.Create(header.Id, model)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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