From 3ae45ddd7e4feff790d5db4b2e83593b564d629a Mon Sep 17 00:00:00 2001
From: Szymon Lesisz <sz.lesisz@gmail.com>
Date: Wed, 5 Dec 2018 14:11:03 +0100
Subject: [PATCH] update fee in reducer only if changed

---
 src/actions/BlockchainActions.js        |  1 +
 src/actions/ripple/BlockchainActions.js | 16 +++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/actions/BlockchainActions.js b/src/actions/BlockchainActions.js
index 5393813e..9dde3442 100644
--- a/src/actions/BlockchainActions.js
+++ b/src/actions/BlockchainActions.js
@@ -16,6 +16,7 @@ export type BlockchainAction = {
     type: typeof BLOCKCHAIN.READY,
 } | {
     type: typeof BLOCKCHAIN.UPDATE_FEE,
+    shortcut: string,
     fee: string,
 }
 
diff --git a/src/actions/ripple/BlockchainActions.js b/src/actions/ripple/BlockchainActions.js
index 14f7e020..3f4cf884 100644
--- a/src/actions/ripple/BlockchainActions.js
+++ b/src/actions/ripple/BlockchainActions.js
@@ -23,16 +23,22 @@ export const subscribe = (network: string): PromiseAction<void> => async (dispat
 };
 
 
-export const onBlockMined = (network: string): PromiseAction<void> => async (dispatch: Dispatch): Promise<void> => {
+export const onBlockMined = (network: string): PromiseAction<void> => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
     const fee = await TrezorConnect.blockchainGetFee({
         coin: network,
     });
     if (!fee.success) return;
 
-    dispatch({
-        type: BLOCKCHAIN.UPDATE_FEE,
-        fee: fee.payload,
-    });
+    const blockchain = getState().blockchain.find(b => b.shortcut === network);
+    if (!blockchain) return;
+
+    if (fee.payload !== blockchain.fee) {
+        dispatch({
+            type: BLOCKCHAIN.UPDATE_FEE,
+            shortcut: network,
+            fee: fee.payload,
+        });
+    }
 };
 
 export const onNotification = (payload: $ElementType<BlockchainNotification, 'payload'>): PromiseAction<void> => async (dispatch: Dispatch, getState: GetState): Promise<void> => {