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PalladiumWallet/src/Core/Storage/WalletStore.cs
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namespace PalladiumWallet.Core.Storage;
/// <summary>
/// Lettura/scrittura del file wallet su disco (blueprint §8): JSON in chiaro
/// senza password, contenitore AES-GCM con password. Scrittura atomica
/// (file temporaneo + rename) per non corrompere il wallet su crash.
/// </summary>
public static class WalletStore
{
public static bool Exists(string path) => File.Exists(path);
/// <summary>True se il file richiede una password per l'apertura.</summary>
public static bool RequiresPassword(string path) =>
EncryptedFile.IsEncrypted(File.ReadAllText(path));
public static WalletDocument Load(string path, string? password = null)
{
var content = File.ReadAllText(path);
if (EncryptedFile.IsEncrypted(content))
{
if (string.IsNullOrEmpty(password))
throw new WrongPasswordException();
content = EncryptedFile.Decrypt(content, password);
}
return WalletDocument.FromJson(content);
}
public static void Save(WalletDocument doc, string path, string? password = null)
{
var content = doc.ToJson();
if (!string.IsNullOrEmpty(password))
content = EncryptedFile.Encrypt(content, password);
var tmp = path + ".tmp";
File.WriteAllText(tmp, content);
File.Move(tmp, path, overwrite: true);
}
}