btcpayserver/BTCPayServer/Views/Invoice/PosData.cshtml

@model (Dictionary<string, object> Items, int Level)

@functions{
    void DisplayValue(object value)
    {
        if (value is string str && str.StartsWith("http"))
        {
            <a href="@str" target="_blank" rel="noreferrer noopener">@str</a>
        }
        else
        {
            @value
        }
    }
}

<table class="table table-sm table-responsive-md removetopborder">
    @foreach (var (key, value) in Model.Items)
    {
        <tr>
            @if (value is string)
            {
                if (!string.IsNullOrEmpty(key))
                {
                    <th class="w-150px">@key</th>
                }
                <td>
                    @{ DisplayValue(value); }
                </td>
            }
            else if (value is Dictionary<string, object>subItems)
            {
                @* This is the array case *@
                if (subItems.Count == 1 && subItems.First().Value is string)
                {
                    <th class="w-150px">@key</th>
                    <td>
                        @{ DisplayValue(subItems.First().Value); }
                    </td>
                }
                else
                {
                    <td colspan="2">
                        @Html.Raw($"<h{Model.Level + 3} class='mt-3'>{key}</h{Model.Level + 3}>")
                        <partial name="PosData" model="(subItems, Model.Level + 1)"/>
                    </td>
                }
            }
        </tr>
    }
</table>