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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand 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.
//
// go-algorand 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 go-algorand. If not, see <https://www.gnu.org/licenses/>.
package libgoal
import (
"encoding/json"
"os"
"path/filepath"
)
const (
walletHandlesJSONName = "walletHandles.json"
)
type walletHandles struct {
Handles map[string]string
}
func readLocked(path string) ([]byte, error) {
lf, err := newLockedFile(path)
if err != nil {
return nil, err
}
return lf.read()
}
func writeLocked(path string, data []byte, perm os.FileMode) error {
lf, err := newLockedFile(path)
if err != nil {
return err
}
return lf.write(data, perm)
}
func (whs *walletHandles) loadFromDisk(cacheDir string) error {
path := walletHandlesCachePath(cacheDir)
_, err := os.Stat(path)
if !os.IsNotExist(err) {
raw, err := readLocked(path)
if err != nil {
return err
}
err = json.Unmarshal(raw, &whs)
if err != nil {
return err
}
}
return nil
}
func (whs *walletHandles) dumpToDisk(cacheDir string) error {
raw, err := json.MarshalIndent(whs, "", " ")
if err != nil {
return err
}
path := walletHandlesCachePath(cacheDir)
err = writeLocked(path, raw, 0600)
if err != nil {
return err
}
return nil
}
func walletHandlesCachePath(cacheDir string) string {
return filepath.Join(cacheDir, walletHandlesJSONName)
}
func loadWalletHandleFromDisk(walletID []byte, cacheDir string) ([]byte, error) {
whs := walletHandles{}
err := whs.loadFromDisk(cacheDir)
if err != nil {
return nil, err
}
return []byte(whs.Handles[string(walletID)]), nil
}
func writeWalletHandleToDisk(handle, walletID []byte, cacheDir string) error {
whs := walletHandles{}
if err := whs.loadFromDisk(cacheDir); err != nil {
return err
}
if whs.Handles == nil {
whs.Handles = make(map[string]string)
}
whs.Handles[string(walletID)] = string(handle)
return whs.dumpToDisk(cacheDir)
}
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