btcpayserver/BTCPayServer/Views/UIInvoice/_RefundModal.cshtml

@model RefundModel

@{
    Layout = null;
}

<form method="post" asp-action="Refund" asp-route-invoiceId="@Context.GetRouteValue("invoiceId")" id="RefundForm">
    <input type="hidden" asp-for="RefundStep" value="@Model.RefundStep"/>
    <input type="hidden" asp-for="Title" value="@Model.Title"/>
    <input type="hidden" asp-for="RateThenText" value="@Model.RateThenText"/>
    <input type="hidden" asp-for="CurrentRateText" value="@Model.CurrentRateText"/>
    <input type="hidden" asp-for="FiatText" value="@Model.FiatText"/>
    
    <h5 class="mb-3">@Model.Title</h5>

    <partial name="_StatusMessage" />
    
    @if (!ViewContext.ModelState.IsValid)
    {
        <div asp-validation-summary="All" class="text-danger"></div>
    }

    @switch (Model.RefundStep)
    {
        case RefundSteps.SelectPaymentMethod:
            if (Model.AvailablePaymentMethods != null && Model.AvailablePaymentMethods.Any())
            {
                <div class="form-group">
                    <label asp-for="SelectedPaymentMethod" class="form-label"></label>
                    <select asp-items="Model.AvailablePaymentMethods" asp-for="SelectedPaymentMethod" class="form-select"></select>
                    <span asp-validation-for="SelectedPaymentMethod" class="text-danger"></span>
                </div>
            
                <div class="form-group">
                    <button id="ok" type="submit" class="btn btn-primary w-100">Next</button>
                </div>
            }
            break;
            
        case RefundSteps.SelectRate:
            <input type="hidden" asp-for="SelectedPaymentMethod"/>
            <input type="hidden" asp-for="CryptoAmountThen"/>
            <input type="hidden" asp-for="FiatAmount"/>
            <input type="hidden" asp-for="CryptoAmountNow"/>
            <style>
                #CustomOption ~ .form-group { display: none; }
                #CustomOption:checked ~ .form-group { display: block; }
            </style>
            <div class="form-group">
                <div class="form-check">
                    <input id="RateThenOption" asp-for="SelectedRefundOption" type="radio" value="RateThen" class="form-check-input"/>
                    <label for="RateThenOption" class="form-check-label">@Model.RateThenText</label>
                    <div class="form-text text-muted">The crypto currency price, at the rate the invoice got paid.</div>
                </div>
            </div>
            <div class="form-group">
                <div class="form-check">
                    <input id="CurrentRateOption" asp-for="SelectedRefundOption" type="radio" value="CurrentRate" class="form-check-input"/>
                    <label for="CurrentRateOption" class="form-check-label">@Model.CurrentRateText</label>
                    <div class="form-text text-muted">The crypto currency price, at the current rate.</div>
                </div>
            </div>
            <div class="form-group">
                <div class="form-check">
                    <input id="FiatOption" asp-for="SelectedRefundOption" type="radio" value="Fiat" class="form-check-input"/>
                    <label for="FiatOption" class="form-check-label">@Model.FiatText</label>
                    <div class="form-text text-muted">The invoice currency, at the rate when the refund will be sent.</div>
                </div>
            </div>

            <div class="form-group">
                <div class="form-check">
                    <input id="CustomOption" asp-for="SelectedRefundOption" type="radio" value="Custom" class="form-check-input"/>
                    <label for="CustomOption" class="form-check-label">Custom amount</label>
                    <div class="form-text text-muted">The specified amount with the specified currency, at the rate when the refund will be sent.</div>
                    <div class="form-group pt-2">
                        <label asp-for="CustomAmount" class="form-label"></label>
                        <div class="input-group">
                            <input asp-for="CustomAmount" type="number" step="any" asp-format="{0}" class="form-control"/>
                            <input asp-for="CustomCurrency" type="text" class="form-control" currency-selection style="max-width:10ch;"/>
                        </div>
                        <span asp-validation-for="CustomAmount" class="text-danger w-100"></span>
                        <span asp-validation-for="CustomCurrency" class="text-danger w-100"></span>
                    </div>
                </div>
            </div>
            
            <div class="form-group">
                <span asp-validation-for="SelectedRefundOption" class="text-danger w-100"></span>
            </div>
            
            <div class="form-group">
                <button id="ok" type="submit" class="btn btn-primary w-100">Create refund</button>
            </div>
            break;
    }
</form>