73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package transactions
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
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)
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type ITransactionsSyncer interface {
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SyncTransactions(headerID int64, logs []types.Log) error
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}
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type TransactionsSyncer struct {
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BlockChain core.BlockChain
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Repository datastore.HeaderRepository
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}
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func NewTransactionsSyncer(db *postgres.DB, blockChain core.BlockChain) TransactionsSyncer {
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repository := repositories.NewHeaderRepository(db)
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return TransactionsSyncer{
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BlockChain: blockChain,
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Repository: repository,
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}
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}
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func (syncer TransactionsSyncer) SyncTransactions(headerID int64, logs []types.Log) error {
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transactionHashes := getUniqueTransactionHashes(logs)
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if len(transactionHashes) < 1 {
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return nil
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}
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transactions, transactionErr := syncer.BlockChain.GetTransactions(transactionHashes)
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if transactionErr != nil {
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return transactionErr
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}
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writeErr := syncer.Repository.CreateTransactions(headerID, transactions)
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if writeErr != nil {
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return writeErr
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}
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return nil
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}
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func getUniqueTransactionHashes(logs []types.Log) []common.Hash {
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seen := make(map[common.Hash]struct{}, len(logs))
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var result []common.Hash
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for _, log := range logs {
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if _, ok := seen[log.TxHash]; ok {
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continue
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}
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seen[log.TxHash] = struct{}{}
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result = append(result, log.TxHash)
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}
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return result
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}
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