/// <summary>
/// Encrypts the provided message with the public key of the specified DID using the anonymous-encryption scheme.
/// </summary>
/// <remarks>
/// <para>If the wallet specified in the <paramref name="wallet"/> parameter contains the public key
/// associated with the DID specified in the <paramref name="did"/> parameter and the value has
/// not expired then this key will be used for encryption.
/// </para>
/// <para>On the other hand, if the public key is not present in the wallet or has expired the public
/// key will be read from the ledger in the node pool specified in the <paramref name="pool"/>
/// parameter and the wallet will be updated with the new public key if required.
/// </para>
/// <para>For further information on registering a public key for a DID see the
/// <see cref="StoreTheirDidAsync(Wallet, string)"/>method and for information on the expiry of
/// values in a wallet see the <see cref="Wallet.CreateWalletAsync(string, string, string, string, string)"/>
/// and <see cref="Wallet.OpenWalletAsync(string, string, string)"/> methods.
/// </para>
/// </remarks>
/// <param name="wallet">The wallet containing the DID to use for encryption.</param>
/// <param name="pool">The node pool to read the public key from if required.</param>
/// <param name="did">The DID the message is to be encrypted for.</param>
/// <param name="msg">The message to encrypt.</param>
/// <returns>An asynchronous <see cref="Task{T}"/> that resolves to a byte array containing the encrypted message once encryption is complete.</returns>
public static Task <byte[]> EncryptSealedAsync(Wallet wallet, Pool pool, string did, byte[] msg)
{
var taskCompletionSource = new TaskCompletionSource <byte[]>();
var commandHandle = PendingCommands.Add(taskCompletionSource);
var commandResult = IndyNativeMethods.indy_encrypt_sealed(
commandHandle,
wallet.Handle,
pool.Handle,
did,
msg,
msg.Length,
_encryptSealedCallback);
CallbackHelper.CheckResult(commandResult);
return(taskCompletionSource.Task);
}
