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store.go
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store.go
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package v1
import (
"encoding/json"
"fmt"
"io/fs"
"os"
"path/filepath"
"sort"
vgcrypto "code.vegaprotocol.io/shared/libs/crypto"
vgfs "code.vegaprotocol.io/shared/libs/fs"
"code.vegaprotocol.io/vegawallet/wallet"
)
type Store struct {
walletsHome string
}
func InitialiseStore(walletsHome string) (*Store, error) {
if err := vgfs.EnsureDir(walletsHome); err != nil {
return nil, fmt.Errorf("couldn't ensure directories at %s: %w", walletsHome, err)
}
return &Store{
walletsHome: walletsHome,
}, nil
}
func (s *Store) WalletExists(name string) bool {
walletPath := s.walletPath(name)
exists, _ := vgfs.PathExists(walletPath)
return exists
}
func (s *Store) ListWallets() ([]string, error) {
walletsParentDir, walletsDir := filepath.Split(s.walletsHome)
entries, err := fs.ReadDir(os.DirFS(walletsParentDir), walletsDir)
if err != nil {
return nil, fmt.Errorf("couldn't read directory at %s: %w", s.walletsHome, err)
}
wallets := make([]string, len(entries))
for i, entry := range entries {
wallets[i] = entry.Name()
}
sort.Strings(wallets)
return wallets, nil
}
func (s *Store) GetWallet(name, passphrase string) (wallet.Wallet, error) {
buf, err := fs.ReadFile(os.DirFS(s.walletsHome), name)
if err != nil {
return nil, fmt.Errorf("couldn't read file at %s: %w", s.walletsHome, err)
}
decBuf, err := vgcrypto.Decrypt(buf, passphrase)
if err != nil {
if err.Error() == "cipher: message authentication failed" {
return nil, wallet.ErrWrongPassphrase
}
return nil, err
}
versionedWallet := &struct {
Version uint32 `json:"version"`
}{}
err = json.Unmarshal(decBuf, versionedWallet)
if err != nil {
return nil, fmt.Errorf("couldn't unmarshal wallet verion: %w", err)
}
if !wallet.IsVersionSupported(versionedWallet.Version) {
return nil, wallet.NewUnsupportedWalletVersionError(versionedWallet.Version)
}
w := &wallet.HDWallet{}
err = json.Unmarshal(decBuf, w)
if err != nil {
return nil, fmt.Errorf("couldn't unmarshal wallet: %w", err)
}
// The wallet name is not saved in the file to avoid de-synchronisation
// between file name and file content
w.SetName(name)
return w, nil
}
func (s *Store) SaveWallet(w wallet.Wallet, passphrase string) error {
buf, err := json.Marshal(w)
if err != nil {
return fmt.Errorf("couldn't marshal wallet: %w", err)
}
encBuf, err := vgcrypto.Encrypt(buf, passphrase)
if err != nil {
return fmt.Errorf("couldn't encrypt wallet: %w", err)
}
walletPath := s.walletPath(w.Name())
err = vgfs.WriteFile(walletPath, encBuf)
if err != nil {
return fmt.Errorf("couldn't write wallet file at %s: %w", walletPath, err)
}
return nil
}
func (s *Store) GetWalletPath(name string) string {
return s.walletPath(name)
}
func (s *Store) walletPath(name string) string {
return filepath.Join(s.walletsHome, name)
}