Consider a pool to be a delegator for itself and fetch its delegator data (#2614)

When a pool is created, it adds own funds to itself. As the pool is removed,
the funds don't get withdrawn automatically, and this has to be done by user.

As we rely on maxWithdrawAllowed of a delegator to show Withdraw button and
amount available for withdraw, we have to perform this query for pool itself.
This also allows rendering delegator list without special-casing validator
and correctly showing both tooltips for currently logged-in pool.

apps/block_scout_web/lib/block_scout_web/channels/stakes_channel.ex

@@ -55,7 +55,15 @@ defmodule BlockScoutWeb.StakesChannel do
     delegators =
       staking_address
       |> Chain.staking_pool_delegators()
-      |> Enum.sort_by(&(to_string(&1.delegator_address_hash) != socket.assigns[:account]))
+      |> Enum.sort_by(fn delegator ->
+        delegator_address = to_string(delegator.delegator_address_hash)
+
+        cond do
+          delegator_address == staking_address -> 0
+          delegator_address == socket.assigns[:account] -> 1
+          true -> 2
+        end
+      end)
 
     html =
       View.render_to_string(StakesView, "_stakes_modal_delegators_list.html",

apps/block_scout_web/lib/block_scout_web/templates/stakes/_stakes_modal_delegators_list.html.eex

@@ -24,23 +24,7 @@
           </thead>
 
           <tbody>
-            <tr>
-              <td class="stakes-td"><div class="stakes-td-order">1</div></td>
-              <td class="stakes-td">
-                <%=
-                  tooltip = if @pool.is_validator do "This is a validator" else false end
-
-                  render BlockScoutWeb.StakesView,
-                    "_stakes_address.html",
-                    address: @pool.staking_address_hash,
-                    tooltip: tooltip
-                %>
-              </td>
-              <td class="stakes-td"><%= format_according_to_decimals(@pool.self_staked_amount, @token.decimals) %></td>
-              <td class="stakes-td"><%= @pool.block_reward_ratio %>%</td>
-            </tr>
-
-            <%= for {delegator, index} <- Enum.with_index(@delegators, 2) do %>
+            <%= for {delegator, index} <- Enum.with_index(@delegators, 1) do %>
               <tr>
                 <td class="stakes-td"><div class="stakes-td-order"><%= index %></div></td>
                 <td class="stakes-td">
@@ -48,6 +32,9 @@
                     <span class="stakes-address">
                       <%= BlockScoutWeb.AddressView.trimmed_hash(delegator.delegator_address_hash) %>
                     </span>
+                    <%= if delegator.delegator_address_hash == @pool.staking_address_hash and @pool.is_validator do %>
+                      <%= render BlockScoutWeb.CommonComponentsView, "_check_tooltip.html", text: "This is a validator" %>
+                    <% end %>
                     <%= if to_string(delegator.delegator_address_hash) == @account do %>
                       <div
                           class="me-tooltip"

apps/explorer/lib/explorer/chain.ex

@@ -4842,14 +4842,7 @@ defmodule Explorer.Chain do
         select: sum(delegator.stake_amount)
       )
 
-    self_staked_query =
-      from(
-        pool in StakingPool,
-        where: pool.staking_address_hash == ^address_hash and pool.is_active,
-        select: sum(pool.self_staked_amount)
-      )
-
-    Decimal.add(Repo.one(staked_query) || Decimal.new(0), Repo.one(self_staked_query) || Decimal.new(0))
+    Repo.one(staked_query) || Decimal.new(0)
   end
 
   defp with_decompiled_code_flag(query, _hash, false), do: query

apps/explorer/lib/explorer/staking/contract_state.ex

@@ -143,7 +143,8 @@ defmodule Explorer.Staking.ContractState do
 
     delegators =
       Enum.flat_map(pool_staking_responses, fn {pool_address, responses} ->
-        Enum.map(responses.active_delegators, &{pool_address, &1, true}) ++
+        [{pool_address, pool_address, true}] ++
+          Enum.map(responses.active_delegators, &{pool_address, &1, true}) ++
           Enum.map(responses.inactive_delegators, &{pool_address, &1, false})
       end)
 

apps/explorer/test/explorer/staking/contract_state_test.exs

@@ -48,7 +48,7 @@ defmodule Explorer.Staking.ContractStateTest do
     assert ContractState.get(:token_contract_address) == "0x6f7a73c96bd56f8b0debc795511eda135e105ea3"
 
     assert Repo.aggregate(StakingPool, :count, :id) == 4
-    assert Repo.aggregate(StakingPoolsDelegator, :count, :id) == 3
+    assert Repo.aggregate(StakingPoolsDelegator, :count, :id) == 7
   end
 
   defp set_init_mox() do
@@ -176,10 +176,30 @@ defmodule Explorer.Staking.ContractStateTest do
       EthereumJSONRPC.Mox,
       :json_rpc,
       fn requests, _opts ->
-        assert length(requests) == 15
+        assert length(requests) == 35
 
         {:ok,
          format_responses([
+           "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
+           "0x0000000000000000000000000000000000000000000000000000000000000000",
            "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
            "0x0000000000000000000000000000000000000000000000000000000000000000",
            "0x0000000000000000000000000000000000000000000000000000000000000000",