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"></div>
    }

    @switch (Model.RefundStep)
    {
        case RefundSteps.SelectPaymentMethod:
            if (Model.AvailablePaymentMethods != null && Model.AvailablePaymentMethods.Any())
            {
                <div class="form-group">
                    <label asp-for="SelectedPayoutMethod" class="form-label"></label>
                    <select asp-items="Model.AvailablePaymentMethods" asp-for="SelectedPayoutMethod" class="form-select"></select>
                    <span asp-validation-for="SelectedPayoutMethod" class="text-danger"></span>
                </div>
            
                <button id="ok" type="submit" class="btn btn-primary w-100">Next</button>
            }
            break;
            
        case RefundSteps.SelectRate:
            <input type="hidden" asp-for="SelectedPayoutMethod"/>
            <input type="hidden" asp-for="CryptoAmountThen"/>
            <input type="hidden" asp-for="FiatAmount"/>        
            <input type="hidden" asp-for="OverpaidAmount"/>
            <input type="hidden" asp-for="CryptoAmountNow"/>            
            <input type="hidden" asp-for="CryptoDivisibility"/>
            <input type="hidden" asp-for="CryptoCode"/>
            <input type="hidden" asp-for="InvoiceCurrency"/>
            <input type="hidden" asp-for="InvoiceDivisibility"/>
            <style>
                .additional-options { display: none; }
                [name="SelectedRefundOption"]:checked ~ .additional-options { display: block; }
            </style>
                           
            <span asp-validation-for="SelectedRefundOption" class="text-danger w-100"></span>
            @if (Model.OverpaidAmount is not null)
            {
                <div class="form-group">
                    <div class="form-check">
                        <input id="OverpaidAmountOption" asp-for="SelectedRefundOption" type="radio" value="OverpaidAmount" class="form-check-input"/>
                        <label for="OverpaidAmountOption" class="form-check-label d-flex align-items-center gap-2">@Model.OverpaidAmountText <span class="badge bg-info">Overpaid amount</span></label>
                        <div class="form-text">The crypto currency amount that was overpaid.</div>
                    </div>
                </div>
                <hr class="border" />
            }
            @if (Model.CryptoAmountThen > 0)
            {
                <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">The crypto currency price, at the rate the invoice got paid.</div>
                    </div>
                </div>
            }
            @if (Model.CryptoAmountNow > 0)
            {
                <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">The crypto currency price, at the current rate.</div>
                    </div>
                </div>
            }
            @if (Model.FiatAmount > 0)
            {
                <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">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">The specified amount with the specified currency, at the rate when the refund will be sent.</div>
                    <div class="form-group pt-2 additional-options">
                        <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 w-auto" currency-selection />
                        </div>
                        <div class="alert alert-warning my-2" hidden id="CustomAmountWarning" role="alert">
                            This is an overpayment of the initial amount.
                        </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>
            <hr class="border" />
            <div class="form-group form-check">
                <label asp-for="SubtractPercentage" class="form-label">
                    Optional: Specify the percentage by which to reduce the refund, e.g. as processing charge or to compensate for the mining fee.
                </label>
                <div class="input-group">
                    <input asp-for="SubtractPercentage" type="number" step=".01" min="0" class="form-control" style="flex: 0 0 10ch;" />
                    <span class="input-group-text">%</span>
                    <span class="input-group-text" id="SubtractPercentageResult" hidden></span>
                </div>
                <span asp-validation-for="SubtractPercentage" class="text-danger w-100"></span>
            </div>
            
            <button id="ok" type="submit" class="btn btn-primary w-100">Create refund</button>
            break;
    }
</form>