Merge pull request #3064 from poanetwork/vb-token-bridge-block-reward

Automatically define Block reward contract address in TokenBridge supply module

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Fixes
 
+- [#3064](https://github.com/poanetwork/blockscout/pull/3064) - Automatically define Block reward contract address in TokenBridge supply module
 - [#3061](https://github.com/poanetwork/blockscout/pull/3061) - Fix verification of contracts with error messages in require in parent contract
 
 ### Chore

apps/explorer/lib/explorer/chain/supply/token_bridge.ex

@@ -20,7 +20,18 @@ defmodule Explorer.Chain.Supply.TokenBridge do
   }
   @total_burned_coins_params %{"totalBurntCoins" => []}
 
-  @block_reward_contract_address "0x867305d19606aadba405ce534e303d0e225f9556"
+  @block_reward_contract_abi %{
+    "type" => "function",
+    "stateMutability" => "view",
+    "payable" => false,
+    "outputs" => [%{"type" => "address", "name" => ""}],
+    "name" => "blockRewardContract",
+    "inputs" => [],
+    "constant" => true
+  }
+
+  @block_reward_contract_params %{"blockRewardContract" => []}
+
   @total_minted_coins_abi %{
     "type" => "function",
     "stateMutability" => "view",
@@ -30,6 +41,7 @@ defmodule Explorer.Chain.Supply.TokenBridge do
     "inputs" => [],
     "constant" => true
   }
+
   @total_minted_coins_params %{"mintedTotally" => []}
 
   @ets_table :token_bridge_contract_coin_cache
@@ -47,16 +59,22 @@ defmodule Explorer.Chain.Supply.TokenBridge do
     cached_total_coins(cache_period)
   end
 
-  defp minted_coins do
-    address = System.get_env("BLOCK_REWARD_CONTRACT") || @block_reward_contract_address
+  defp burned_coins do
+    address = System.get_env("TOKEN_BRIDGE_CONTRACT") || @token_bridge_contract_address
 
-    call_contract(address, @total_minted_coins_abi, @total_minted_coins_params)
+    call_contract(address, @total_burned_coins_abi, @total_burned_coins_params)
   end
 
-  defp burned_coins do
+  defp block_reward_contract do
     address = System.get_env("TOKEN_BRIDGE_CONTRACT") || @token_bridge_contract_address
 
-    call_contract(address, @total_burned_coins_abi, @total_burned_coins_params)
+    call_contract(address, @block_reward_contract_abi, @block_reward_contract_params)
+  end
+
+  defp minted_coins do
+    address = block_reward_contract()
+
+    call_contract(address, @total_minted_coins_abi, @total_minted_coins_params)
   end
 
   defp call_contract(address, abi, params) do
@@ -73,7 +91,23 @@ defmodule Explorer.Chain.Supply.TokenBridge do
         _ -> 0
       end
 
-    %Wei{value: Decimal.new(value)}
+    type =
+      abi
+      |> Enum.at(0)
+      |> Map.get("outputs", [])
+      |> Enum.at(0)
+      |> Map.get("type", "")
+
+    case type do
+      "address" ->
+        "0x" <> Base.encode16(value)
+
+      "uint256" ->
+        %Wei{value: Decimal.new(value)}
+
+      _ ->
+        value
+    end
   end
 
   def cached_total_coins(cache_period) do