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watched_scripts.go
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/
watched_scripts.go
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package db
import (
"database/sql"
"encoding/hex"
"sync"
)
type WatchedScriptsDB struct {
db *sql.DB
lock *sync.RWMutex
}
func (w *WatchedScriptsDB) Put(scriptPubKey []byte) error {
w.lock.Lock()
defer w.lock.Unlock()
tx, _ := w.db.Begin()
stmt, err := tx.Prepare("insert or replace into watchedScripts(scriptPubKey) values(?)")
defer stmt.Close()
if err != nil {
tx.Rollback()
return err
}
_, err = stmt.Exec(hex.EncodeToString(scriptPubKey))
if err != nil {
tx.Rollback()
return err
}
tx.Commit()
return nil
}
func (w *WatchedScriptsDB) GetAll() ([][]byte, error) {
w.lock.RLock()
defer w.lock.RUnlock()
var ret [][]byte
stm := "select scriptPubKey from watchedScripts"
rows, err := w.db.Query(stm)
defer rows.Close()
if err != nil {
return ret, err
}
for rows.Next() {
var scriptHex string
if err := rows.Scan(&scriptHex); err != nil {
continue
}
scriptPubKey, err := hex.DecodeString(scriptHex)
if err != nil {
continue
}
ret = append(ret, scriptPubKey)
}
return ret, nil
}
func (w *WatchedScriptsDB) Delete(scriptPubKey []byte) error {
w.lock.Lock()
defer w.lock.Unlock()
_, err := w.db.Exec("delete from watchedScripts where scriptPubKey=?", hex.EncodeToString(scriptPubKey))
if err != nil {
return err
}
return nil
}