do not aggregate NFT token transfers

[ayrat555]

fixes

2019-08-07T09:59:35.684 [error] #PID<0.4717.0> running BlockScoutWeb.Endpoint (connection #PID<0.4713.0>, stream id 2) terminated
Server: localhost:4000 (http)
Request: GET /tx/0x3a8589b18bd39dd9c16c7552dae18ffb5670daa57b59c63d45cbf43f4a2a89dc/token_transfers
** (exit) an exception was raised:
    ** (FunctionClauseError) no function clause matching in Decimal.decimal/1
        (decimal) lib/decimal.ex:1911: Decimal.decimal(nil)
        (decimal) lib/decimal.ex:333: Decimal.add/2
        (block_scout_web) lib/block_scout_web/views/transaction_view.ex:55: anonymous fn/2 in BlockScoutWeb.TransactionView.aggregate_token_transfers/1
        (elixir) lib/enum.ex:1948: Enum."-reduce/3-lists^foldl/2-0-"/3
        (block_scout_web) lib/block_scout_web/views/transaction_view.ex:44: BlockScoutWeb.TransactionView.aggregate_token_transfers/1
        (block_scout_web) lib/block_scout_web/templates/transaction/overview.html.eex:180: BlockScoutWeb.TransactionView."overview.html"/1
        (block_scout_web) lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:2: BlockScoutWeb.TransactionTokenTransferView."index.html"/1
        (block_scout_web) lib/block_scout_web/templates/layout/app.html.eex:44: BlockScoutWeb.LayoutView."app.html"/1
        (phoenix) lib/phoenix/view.ex:399: Phoenix.View.render_to_iodata/3
        (phoenix) lib/phoenix/controller.ex:729: Phoenix.Controller.__put_render__/5
        (block_scout_web) lib/block_scout_web/endpoint.ex:1: BlockScoutWeb.Endpoint.instrument/4
        (phoenix) lib/phoenix/controller.ex:746: Phoenix.Controller.instrument_render_and_send/4
        (block_scout_web) lib/block_scout_web/controllers/transaction_token_transfer_controller.ex:1: BlockScoutWeb.TransactionTokenTransferController.action/2
        (block_scout_web) lib/block_scout_web/controllers/transaction_token_transfer_controller.ex:1: BlockScoutWeb.TransactionTokenTransferController.phoenix_controller_pipeline/2
        (block_scout_web) lib/block_scout_web/endpoint.ex:1: BlockScoutWeb.Endpoint.instrument/4
        (phoenix) lib/phoenix/router.ex:275: Phoenix.Router.__call__/1
        (block_scout_web) lib/block_scout_web/endpoint.ex:1: BlockScoutWeb.Endpoint.plug_builder_call/2
        (block_scout_web) lib/plug/debugger.ex:122: BlockScoutWeb.Endpoint."call (overridable 3)"/2
        (block_scout_web) lib/block_scout_web/endpoint.ex:1: BlockScoutWeb.Endpoint."call (overridable 4)"/2
        (block_scout_web) lib/spandex_phoenix.ex:156: BlockScoutWeb.Endpoint.call/2

Changelog

• do not aggregate NFT token transfers

[coveralls]

Pull Request Test Coverage Report for Build 842519a9-23b1-4af0-9aee-a6606073ba2d

• 14 of 14 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 79.313%

---

Totals
Change from base Build c025ab3e-d6aa-4d31-b8d9-ef4582b1a804:	0.02%
Covered Lines:	5172
Relevant Lines:	6521

---

💛 - Coveralls