Make client tx callbacks options as struct

options.go

@@ -7,8 +7,12 @@ type RequestWithContextOption interface {
 }
 
 type RequestWithContextOptions struct {
-	ResponseHandler     func(res sip.Response, request sip.Request)
-	Authorizer          sip.Authorizer
+	ResponseHandler func(res sip.Response, request sip.Request)
+	Authorizer      sip.Authorizer
+	ClientTransactionCallbacks
+}
+
+type ClientTransactionCallbacks struct {
 	OnAckFn, OnCancelFn func(sip.Request)
 }
 
@@ -36,15 +40,15 @@ func WithAuthorizer(authorizer sip.Authorizer) RequestWithContextOption {
 	return withAuthorizer{authorizer}
 }
 
-type withCallbacks struct {
+type withClientTxCallbacks struct {
 	onAckFn, onCancFn func(sip.Request)
 }
 
-func WithCallbacks(onAckFn, onCancFn func(sip.Request)) RequestWithContextOption {
-	return withCallbacks{onAckFn, onCancFn}
+func WithClientTransactionCallbacks(callbacks ClientTransactionCallbacks) RequestWithContextOption {
+	return withClientTxCallbacks{callbacks.OnAckFn, callbacks.OnCancelFn}
 }
 
-func (o withCallbacks) ApplyRequestWithContext(options *RequestWithContextOptions) {
+func (o withClientTxCallbacks) ApplyRequestWithContext(options *RequestWithContextOptions) {
 	options.OnAckFn = o.onAckFn
 	options.OnCancelFn = o.onCancFn
 }