ERC-1155 metadata fetching: add tests

apps/explorer/lib/explorer/token/instance_metadata_retriever.ex

@@ -75,10 +75,10 @@ defmodule Explorer.Token.InstanceMetadataRetriever do
       |> fetch_json()
 
     if res == {:ok, %{error: @vm_execution_error}} do
-      contract_functions_2 = %{@uri => [token_id]}
+      contract_functions_uri = %{@uri => [token_id]}
 
       contract_address_hash
-      |> query_contract(contract_functions_2, @abi_uri)
+      |> query_contract(contract_functions_uri, @abi_uri)
       |> fetch_json()
     else
       res

apps/explorer/test/explorer/token/instance_metadata_retriever_test.exs

@@ -9,6 +9,49 @@ defmodule Explorer.Token.InstanceMetadataRetrieverTest do
   setup :verify_on_exit!
   setup :set_mox_global
 
+  @abi [
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [
+        %{"type" => "string", "name" => ""}
+      ],
+      "name" => "tokenURI",
+      "inputs" => [
+        %{
+          "type" => "uint256",
+          "name" => "_tokenId"
+        }
+      ],
+      "constant" => true
+    }
+  ]
+
+  @abi_uri [
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [
+        %{
+          "type" => "string",
+          "name" => "",
+          "internalType" => "string"
+        }
+      ],
+      "name" => "uri",
+      "inputs" => [
+        %{
+          "type" => "uint256",
+          "name" => "_id",
+          "internalType" => "uint256"
+        }
+      ],
+      "constant" => true
+    }
+  ]
+
   describe "fetch_metadata/2" do
     @tag :no_parity
     @tag :no_geth
@@ -46,9 +89,56 @@ defmodule Explorer.Token.InstanceMetadataRetrieverTest do
       assert %{
                "c87b56dd" => {:ok, ["https://vault.warriders.com/18290729947667102496.json"]}
              } ==
-               InstanceMetadataRetriever.query_contract("0x5caebd3b32e210e85ce3e9d51638b9c445481567", %{
-                 "c87b56dd" => [18_290_729_947_667_102_496]
-               })
+               InstanceMetadataRetriever.query_contract(
+                 "0x5caebd3b32e210e85ce3e9d51638b9c445481567",
+                 %{
+                   "c87b56dd" => [18_290_729_947_667_102_496]
+                 },
+                 @abi
+               )
+    end
+
+    test "fetches json metadata for ERC-1155 token", %{json_rpc_named_arguments: json_rpc_named_arguments} do
+      if json_rpc_named_arguments[:transport] == EthereumJSONRPC.Mox do
+        EthereumJSONRPC.Mox
+        |> expect(:json_rpc, fn [
+                                  %{
+                                    id: 0,
+                                    jsonrpc: "2.0",
+                                    method: "eth_call",
+                                    params: [
+                                      %{
+                                        data:
+                                          "0x0e89341c000000000000000000000000000000000000000000000000fdd5b9fa9d4bfb20",
+                                        to: "0x5caebd3b32e210e85ce3e9d51638b9c445481567"
+                                      },
+                                      "latest"
+                                    ]
+                                  }
+                                ],
+                                _options ->
+          {:ok,
+           [
+             %{
+               id: 0,
+               jsonrpc: "2.0",
+               result:
+                 "0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003568747470733a2f2f7661756c742e7761727269646572732e636f6d2f31383239303732393934373636373130323439362e6a736f6e0000000000000000000000"
+             }
+           ]}
+        end)
+      end
+
+      assert %{
+               "0e89341c" => {:ok, ["https://vault.warriders.com/18290729947667102496.json"]}
+             } ==
+               InstanceMetadataRetriever.query_contract(
+                 "0x5caebd3b32e210e85ce3e9d51638b9c445481567",
+                 %{
+                   "0e89341c" => [18_290_729_947_667_102_496]
+                 },
+                 @abi_uri
+               )
     end
   end