/// <summary>
/// Removes the specified block from the cache repository.
/// </summary>
/// <param name="hash">The block's hash that identifies the requested block.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The requested bitcoin block.</returns>
public Task InvalidateAsync(uint256 hash, CancellationToken cancellationToken)
{
return(BlockRepository.RemoveAsync(hash, cancellationToken));
}