btcpayserver/BTCPayServer/Views/Invoice/Refund.cshtml

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

<section>
    <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"/>
                        @switch (Model.RefundStep)
                        {
                            case RefundSteps.SelectPaymentMethod:
                                <div class="form-group">
                                    <label asp-for="SelectedPaymentMethod"></label>
                                    <select asp-items="Model.AvailablePaymentMethods" asp-for="SelectedPaymentMethod" class="form-control"></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-block btn-lg">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-inline">
                                        <input id="RateThenText" asp-for="SelectedRefundOption" type="radio" value="RateThen" class="form-check-input"/>
                                        <label for="RateThenText" 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-inline">
                                        <input id="CurrentRateText" asp-for="SelectedRefundOption" type="radio" value="CurrentRate" class="form-check-input"/>
                                        <label for="CurrentRateText" 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-inline">
                                        <input id="FiatText" asp-for="SelectedRefundOption" type="radio" value="Fiat" class="form-check-input"/>
                                        <label for="FiatText" 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-inline">
                                        <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">
                                    <button id="ok" type="submit" class="btn btn-primary btn-block btn-lg">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"></label>
                                    <div class="input-group">
                                        <input asp-for="CustomAmount" type="number" step="any" asp-format="{0}" class="form-control"/>
                                        <div class="input-group-append">
                                            <input asp-for="CustomCurrency" type="text"class="form-control"/>
                                        </div>
                                    </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-block btn-lg">Next</button>
                                </div>
                                break;
                        }
                    </form>
                </div>
            </div>
        </div>
    </div>
</section>