btcpayserver/BTCPayServer/Views/Shared/_StatusMessage.cshtml

@{
    StatusMessageModel parsedModel = null;
    TempData.TryGetValue(WellKnownTempData.SuccessMessage, out var successMessage);
    TempData.TryGetValue(WellKnownTempData.ErrorMessage, out var errorMessage);
    var model = TempData.GetStatusMessageModel();
    if (successMessage != null || errorMessage != null)
    {
        parsedModel = new StatusMessageModel();
        parsedModel.Message = (string)successMessage ?? (string)errorMessage;
        if (successMessage != null)
        {
            parsedModel.Severity = StatusMessageModel.StatusSeverity.Success;
        }
        else
        {
            parsedModel.Severity = StatusMessageModel.StatusSeverity.Error;
        }
    }
    else if (model != null)
    {
        parsedModel = model as StatusMessageModel;
    }
}

@if (parsedModel != null)
{
    <div class="alert alert-@parsedModel.SeverityCSS @(parsedModel.AllowDismiss? "alert-dismissible":"" )" role="alert">
        @if (parsedModel.AllowDismiss)
        {
            <button type="button" class="close" data-dismiss="alert" aria-label="Close">
                <span aria-hidden="true">&times;</span>
            </button>
        }
        @if (!string.IsNullOrEmpty(parsedModel.Message))
        {
            @parsedModel.Message
        }
        @if (!string.IsNullOrEmpty(parsedModel.Html))
        {
            @Safe.Raw(parsedModel.Html)
        }
    </div>
}