ipld-eth-server/pkg/datastore/postgres/repositories/logs_repository.go
2019-03-13 11:42:30 -05:00

108 lines
3.0 KiB
Go

// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package repositories
import (
"github.com/sirupsen/logrus"
"database/sql"
"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
)
type LogRepository struct {
*postgres.DB
}
func (logRepository LogRepository) CreateLogs(lgs []core.Log, receiptId int64) error {
tx, _ := logRepository.DB.Beginx()
for _, tlog := range lgs {
_, err := tx.Exec(
`INSERT INTO logs (block_number, address, tx_hash, index, topic0, topic1, topic2, topic3, data, receipt_id)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
`,
tlog.BlockNumber, tlog.Address, tlog.TxHash, tlog.Index, tlog.Topics[0], tlog.Topics[1], tlog.Topics[2], tlog.Topics[3], tlog.Data, receiptId,
)
if err != nil {
err = tx.Rollback()
if err != nil {
logrus.Error("CreateLogs: could not perform rollback: ", err)
}
return postgres.ErrDBInsertFailed
}
}
err := tx.Commit()
if err != nil {
err = tx.Rollback()
if err != nil {
logrus.Error("CreateLogs: could not perform rollback: ", err)
}
return postgres.ErrDBInsertFailed
}
return nil
}
func (logRepository LogRepository) GetLogs(address string, blockNumber int64) ([]core.Log, error) {
logRows, err := logRepository.DB.Query(
`SELECT block_number,
address,
tx_hash,
index,
topic0,
topic1,
topic2,
topic3,
data
FROM logs
WHERE address = $1 AND block_number = $2
ORDER BY block_number DESC`, address, blockNumber)
if err != nil {
return []core.Log{}, err
}
return logRepository.loadLogs(logRows)
}
func (logRepository LogRepository) loadLogs(logsRows *sql.Rows) ([]core.Log, error) {
var lgs []core.Log
for logsRows.Next() {
var blockNumber int64
var address string
var txHash string
var index int64
var data string
var topics core.Topics
err := logsRows.Scan(&blockNumber, &address, &txHash, &index, &topics[0], &topics[1], &topics[2], &topics[3], &data)
if err != nil {
logrus.Error("loadLogs: Error scanning a row in logRows: ", err)
return []core.Log{}, err
}
lg := core.Log{
BlockNumber: blockNumber,
TxHash: txHash,
Address: address,
Index: index,
Data: data,
}
for i, topic := range topics {
lg.Topics[i] = topic
}
lgs = append(lgs, lg)
}
return lgs, nil
}