[Bug]: Refund crashes when the invoice is settled qith no payment

[Nisaba]

What is your BTCPay version?

BTCPay Server v1.13.1+ca55e1f30

How did you deploy BTCPay Server?

Docker

What happened?

If an invoice is settled manually in BTCPay server with no payment, the refund via greenfield crashes.

How did you encounter this bug?

via greenfield php

Relevant log output

`2024-05-23 18:37:24.438 +00:00 [ERR] Connection id "0HN3NJ2IPC796", Request id "0HN3NJ2IPC796:00000001": An unhandled exception was thrown by the application.
System.ArgumentException: Amount out of bound (Parameter 'create')
   at BTCPayServer.HostedServices.PullPaymentHostedService.CreatePullPayment(CreatePullPayment create) in /source/BTCPayServer/HostedServices/PullPaymentHostedService.cs:line 115
   at BTCPayServer.Controllers.Greenfield.GreenfieldInvoiceController.RefundInvoice(String storeId, String invoiceId, RefundInvoiceRequest request, CancellationToken cancellationToken) in /source/BTCPayServer/Controllers/GreenField/GreenfieldInvoiceController.cs:line 520
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ExceptionContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at BTCPayServer.Hosting.BTCPayMiddleware.Invoke(HttpContext httpContext) in /source/BTCPayServer/Hosting/BTCpayMiddleware.cs:line 97
   at BTCPayServer.Hosting.GreenfieldMiddleware.Invoke(HttpContext httpContext) in /source/BTCPayServer/Hosting/GreenfieldMiddleware.cs:line 30
   at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
   at BTCPayServer.Hosting.HeadersOverrideMiddleware.Invoke(HttpContext httpContext) in /source/BTCPayServer/Hosting/HeadersOverrideMiddleware.cs:line 29
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)`

What browser do you use?

No response

Additional information

No response

Are you sure this is a bug report?

• I confirm this is a bug report