From 95ef7d6d1f2bfa38dd312d3bb6e2826956f443da Mon Sep 17 00:00:00 2001
From: Brandon Thomas <echelon@gmail.com>
Date: Sun, 28 Dec 2025 23:32:07 -0500
Subject: [PATCH] kling 2.1 master cost

---
 .../fal_client/src/requests/traits/mod.rs      |  2 +-
 ...kling_v2p1_master_image_to_video_webhook.rs | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/crates/api_clients/fal_client/src/requests/traits/mod.rs b/crates/api_clients/fal_client/src/requests/traits/mod.rs
index 2fa97162b2..bc69599d33 100644
--- a/crates/api_clients/fal_client/src/requests/traits/mod.rs
+++ b/crates/api_clients/fal_client/src/requests/traits/mod.rs
@@ -1 +1 @@
-mod fal_request_cost_calculator_trait;
\ No newline at end of file
+pub mod fal_request_cost_calculator_trait;
\ No newline at end of file
diff --git a/crates/api_clients/fal_client/src/requests/webhook/video/image/enqueue_kling_v2p1_master_image_to_video_webhook.rs b/crates/api_clients/fal_client/src/requests/webhook/video/image/enqueue_kling_v2p1_master_image_to_video_webhook.rs
index 66e300345b..d387ed293c 100644
--- a/crates/api_clients/fal_client/src/requests/webhook/video/image/enqueue_kling_v2p1_master_image_to_video_webhook.rs
+++ b/crates/api_clients/fal_client/src/requests/webhook/video/image/enqueue_kling_v2p1_master_image_to_video_webhook.rs
@@ -4,6 +4,7 @@ use crate::error::fal_error_plus::FalErrorPlus;
 use fal::endpoints::fal_ai::kling_video::v2_1::master::image_to_video::{image_to_video, MasterImageToVideoRequest};
 use fal::webhook::WebhookResponse;
 use reqwest::IntoUrl;
+use crate::requests::traits::fal_request_cost_calculator_trait::{FalRequestCostCalculator, UsdCents};
 
 pub struct Kling2p1MasterArgs<'a, U: IntoUrl, V: IntoUrl> {
   pub image_url: U,
@@ -28,11 +29,26 @@ pub enum Kling2p1MasterAspectRatio {
   TallNineSixteen, // 9:16
 }
 
+impl <U: IntoUrl, V: IntoUrl> FalRequestCostCalculator for Kling2p1MasterArgs<'_, U, V> {
+  fn calculate_cost_in_cents(&self) -> UsdCents {
+    // "For 5s video your request will cost $1.40.
+    //  For every additional second you will be charged $0.28."
+    match self.duration {
+      Kling2p1MasterDuration::Default => 140, // $1.40 for 5 seconds
+      Kling2p1MasterDuration::FiveSeconds => 140, // $1.40 for 5 seconds
+      Kling2p1MasterDuration::TenSeconds => 280, // $1.40 + (0.28 * 5) = $2.80
+    }
+  }
+}
+
+
+/// Kling 2.1 Master Image-to-Video
+/// https://fal.ai/models/fal-ai/kling-video/v2.1/master/image-to-video
 pub async fn enqueue_kling_v2p1_master_image_to_video_webhook<U: IntoUrl, V: IntoUrl>(
   args: Kling2p1MasterArgs<'_, U, V>
 ) -> Result<WebhookResponse, FalErrorPlus> {
   let duration = match args.duration {
-    Kling2p1MasterDuration::Default => None,
+    Kling2p1MasterDuration::Default => None, // defaults to "5"
     Kling2p1MasterDuration::FiveSeconds => Some("5".to_string()), // Gross...
     Kling2p1MasterDuration::TenSeconds => Some("10".to_string()),
   };