ipld-eth-server/pkg/repositories/postgres/logs.go

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package postgres
import (
"context"
"database/sql"
"github.com/vulcanize/vulcanizedb/pkg/core"
)
func (db DB) CreateLogs(logs []core.Log) error {
tx, _ := db.DB.BeginTx(context.Background(), nil)
for _, tlog := range logs {
_, err := tx.Exec(
`INSERT INTO logs (block_number, address, tx_hash, index, topic0, topic1, topic2, topic3, data)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
`,
tlog.BlockNumber, tlog.Address, tlog.TxHash, tlog.Index, tlog.Topics[0], tlog.Topics[1], tlog.Topics[2], tlog.Topics[3], tlog.Data,
)
if err != nil {
tx.Rollback()
return ErrDBInsertFailed
}
}
tx.Commit()
return nil
}
func (db DB) GetLogs(address string, blockNumber int64) []core.Log {
logRows, _ := db.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)
return db.loadLogs(logRows)
}
func (db DB) loadLogs(logsRows *sql.Rows) []core.Log {
var logs []core.Log
for logsRows.Next() {
var blockNumber int64
var address string
var txHash string
var index int64
var data string
var topics core.Topics
logsRows.Scan(&blockNumber, &address, &txHash, &index, &topics[0], &topics[1], &topics[2], &topics[3], &data)
log := core.Log{
BlockNumber: blockNumber,
TxHash: txHash,
Address: address,
Index: index,
Data: data,
}
for i, topic := range topics {
log.Topics[i] = topic
}
logs = append(logs, log)
}
return logs
}