fix claimrewardsamount reducer. get all (#548)

lib/reducers/cosmosV2-reducers.js

@@ -92,12 +92,25 @@ function claimRewardsAmountReducer(transaction, reducers, stakingDenom) {
       }
     ]
   }
-  return reducers.rewardCoinReducer(
-    transaction.events
-      .find(event => event.type === `transfer`)
-      .attributes.find(attribute => attribute.key === `amount`).value,
-    stakingDenom
+  const allClaimedRewards = transaction.events
+    .find(event => event.type === `transfer`)
+    .attributes.filter(attribute => attribute.key === `amount`)
+    .map(amount => amount.value)
+    .map(rewardValue => reducers.rewardCoinReducer(rewardValue))
+  const aggregatedClaimRewardsObject = allClaimedRewards.reduce(
+    (all, rewards) => {
+      rewards.forEach(reward => {
+        all = {
+          ...all,
+          [reward.denom]: reward.amount.plus(all[reward.denom] || 0)
+        }
+      })
+      return all
+    },
+    {}
   )
+  const claimedRewardsDenomArray = Object.entries(aggregatedClaimRewardsObject)
+  return claimedRewardsDenomArray.map(([denom, amount]) => ({ denom, amount }))
 }
 
 function submitProposalDetailsReducer(message, reducers) {