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wallet: truncate file when writing

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If wallet size decreases, we need to remove trailing garbage if it
exists. This can happen when removing account or reading pretty-printed
wallet. It doesn't affect our CLI (we decode only file prefix), but
it is nice to always have a valid JSON file.

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgeniy Stratonikov 2021-07-29 14:46:07 +03:00
parent 8f196c8222
commit a429aa3e68
2 changed files with 42 additions and 1 deletions
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32
cli/wallet_test.go
View file

@ -19,6 +19,38 @@ import (
"github.com/stretchr/testify/require"
)
func TestWalletAccountRemove(t *testing.T) {
tmpDir, err := ioutil.TempDir("", "neogo.test.walletinit")
require.NoError(t, err)
t.Cleanup(func() {
os.RemoveAll(tmpDir)
})
e := newExecutor(t, false)
walletPath := path.Join(tmpDir, "wallet.json")
e.In.WriteString("acc1\r")
e.In.WriteString("pass\r")
e.In.WriteString("pass\r")
e.Run(t, "neo-go", "wallet", "init", "--wallet", walletPath, "--account")
e.In.WriteString("acc2\r")
e.In.WriteString("pass\r")
e.In.WriteString("pass\r")
e.Run(t, "neo-go", "wallet", "create", "--wallet", walletPath)
w, err := wallet.NewWalletFromFile(walletPath)
require.NoError(t, err)
addr := w.Accounts[0].Address
e.Run(t, "neo-go", "wallet", "remove", "--wallet", walletPath,
"--address", addr, "--force")
rawWallet, err := ioutil.ReadFile(walletPath)
require.NoError(t, err)
require.NoError(t, json.Unmarshal(rawWallet, new(wallet.Wallet)))
}
func TestWalletInit(t *testing.T) {
tmpDir, err := ioutil.TempDir("", "neogo.test.walletinit")
require.NoError(t, err)

11
pkg/wallet/wallet.go
View file

@ -167,7 +167,16 @@ func (w *Wallet) writeRaw(data []byte) error {
}
_, err := w.rw.Write(data)
return err
if err != nil {
return err
}
if f, ok := w.rw.(*os.File); ok {
if err := f.Truncate(int64(len(data))); err != nil {
return err
}
}
return nil
}
func (w *Wallet) rewind() error {