From 141d397bdf27e1997be10f6cc9b63508cd20c55a Mon Sep 17 00:00:00 2001
From: Satyajit Sahoo <satyajit.happy@gmail.com>
Date: Tue, 28 Jan 2020 14:35:31 +0100
Subject: [PATCH] chore: tweak types for stack

---
 packages/stack/src/types.tsx | 37 ++++++++++++++----------------------
 1 file changed, 14 insertions(+), 23 deletions(-)

diff --git a/packages/stack/src/types.tsx b/packages/stack/src/types.tsx
index 74530f4c..56e0b037 100644
--- a/packages/stack/src/types.tsx
+++ b/packages/stack/src/types.tsx
@@ -1,6 +1,5 @@
 import {
   Animated,
-  EasingFunction,
   StyleProp,
   TextStyle,
   ViewStyle,
@@ -430,29 +429,21 @@ export type StackHeaderTitleProps = {
   style?: StyleProp<TextStyle>;
 };
 
-export type Screen = React.ComponentType<any> & {
-  navigationOptions?: StackNavigationOptions & {
-    [key: string]: any;
-  };
-};
-
-export type SpringConfig = {
-  damping: number;
-  mass: number;
-  stiffness: number;
-  restSpeedThreshold: number;
-  restDisplacementThreshold: number;
-  overshootClamping: boolean;
-};
-
-export type TimingConfig = {
-  duration: number;
-  easing: EasingFunction;
-};
-
 export type TransitionSpec =
-  | { animation: 'spring'; config: SpringConfig }
-  | { animation: 'timing'; config: TimingConfig };
+  | {
+      animation: 'spring';
+      config: Omit<
+        Animated.SpringAnimationConfig,
+        'toValue' | keyof Animated.AnimationConfig
+      >;
+    }
+  | {
+      animation: 'timing';
+      config: Omit<
+        Animated.TimingAnimationConfig,
+        'toValue' | keyof Animated.AnimationConfig
+      >;
+    };
 
 export type StackCardInterpolationProps = {
   /**