Merge pull request #4601 from blockscout/vb-fix-endless-fetching-tokens

Fix endless Fetching tokens... message on empty addresses

CHANGELOG.md

@@ -6,6 +6,7 @@
 - [#4579](https://github.com/blockscout/blockscout/pull/4579) - Write contract page: Resize inputs; Improve multiplier selector
 
 ### Fixes
+- [#4601](https://github.com/blockscout/blockscout/pull/4601) - Fix endless Fetching tokens... message on empty addresses
 - [#4591](https://github.com/blockscout/blockscout/pull/4591) - Add step and min value for txValue input field
 - [#4589](https://github.com/blockscout/blockscout/pull/4589) - Fix solid outputs on contract read page
 - [#4586](https://github.com/blockscout/blockscout/pull/4586) - Fix floating tooltips on the token transfer family blocks

apps/block_scout_web/assets/js/pages/address.js

@@ -77,9 +77,11 @@ export function reducer (state = initialState, action) {
 
 let fetchedTokenBalanceBlockNumber = 0
 function loadTokenBalance (blockNumber) {
-  if (blockNumber >= fetchedTokenBalanceBlockNumber) {
+  if (blockNumber > fetchedTokenBalanceBlockNumber) {
     fetchedTokenBalanceBlockNumber = blockNumber
     setTimeout(loadTokenBalanceDropdown, 1000)
+  } else if (fetchedTokenBalanceBlockNumber === 0 && blockNumber === null) {
+    setTimeout(loadTokenBalanceDropdown, 1000)
   }
 }
 
@@ -94,7 +96,7 @@ const elements = {
       return { balanceCard: $el.html(), balance: parseFloat($el.find('.current-balance-in-wei').attr('data-wei-value')) }
     },
     render ($el, state, oldState) {
-      if (oldState.balance === state.balance || isNaN(state.balance)) return
+      if (oldState.balance === state.balance || (isNaN(oldState.balance) && isNaN(state.balance))) return
       $el.empty().append(state.balanceCard)
       loadTokenBalance(state.fetchedCoinBalanceBlockNumber)
       updateAllCalculatedUsdValues()

apps/block_scout_web/lib/block_scout_web/controllers/address_controller.ex

@@ -92,7 +92,12 @@ defmodule BlockScoutWeb.AddressController do
         validation_count: validation_count
       })
     else
-      _ -> not_found(conn)
+      _ ->
+        json(conn, %{
+          transaction_count: 0,
+          gas_usage_count: 0,
+          validation_count: 0
+        })
     end
   end