btcpayserver/BTCPayServer/Views/UIInvoice/Refund.cshtml

@model RefundModel
@{
    ViewData["Title"] = "Refund";
}

<div class="row">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h4 class="modal-title">@Model.Title</h4>
            </div>
            <div class="modal-body">
                <form method="post">
                    <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"/>

                    @switch (Model.RefundStep)
                    {
                        case RefundSteps.SelectPaymentMethod:
                            <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 btn-lg 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"/>
                            <div class="form-group">
                                <div class="form-check">
                                    <input id="RateThenTextRadio" asp-for="SelectedRefundOption" type="radio" value="RateThen" class="form-check-input"/>
                                    <label for="RateThenTextRadio" class="form-check-label">@Model.RateThenText</label>
                                </div>
                                <small class="form-text text-muted">The crypto currency price, at the rate the invoice got paid.</small>
                            </div>
                            <div class="form-group">
                                <div class="form-check">
                                    <input id="CurrentRateTextRadio" asp-for="SelectedRefundOption" type="radio" value="CurrentRate" class="form-check-input"/>
                                    <label for="CurrentRateTextRadio" class="form-check-label">@Model.CurrentRateText</label>
                                </div>
                                <small class="form-text text-muted">The crypto currency price, at the current rate.</small>
                            </div>
                            <div class="form-group">
                                <div class="form-check">
                                    <input id="FiatTextRadio" asp-for="SelectedRefundOption" type="radio" value="Fiat" class="form-check-input"/>
                                    <label for="FiatTextRadio" class="form-check-label">@Model.FiatText</label>
                                </div>
                                <small class="form-text text-muted">The invoice currency, at the rate when the refund will be sent.</small>
                            </div>

                            <div class="form-group">
                                <div class="form-check">
                                    <input id="CustomText" asp-for="SelectedRefundOption" type="radio" value="Custom" class="form-check-input"/>
                                    <label for="CustomText" class="form-check-label">Custom</label>
                                </div>
                                <small class="form-text text-muted">The specified amount with the specified currency, at the rate when the refund will be sent. </small>
                            </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 btn-lg w-100">Create refund</button>
                            </div>
                            break;
                        case RefundSteps.SelectCustomAmount:

                            <input type="hidden" asp-for="SelectedPaymentMethod"/>
                            <input type="hidden" asp-for="CryptoAmountThen"/>
                            <input type="hidden" asp-for="FiatAmount"/>
                            <input type="hidden" asp-for="CryptoAmountNow"/>
                            <input type="hidden" asp-for="SelectedRefundOption"/>

                            <div class="form-group">
                                <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"/>
                                </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 class="form-group">
                                <button id="ok" type="submit" class="btn btn-primary btn-lg w-100">Next</button>
                            </div>
                            break;
                    }
                </form>
            </div>
        </div>
    </div>
</div>