CJ Bryan and Desmond Bowe
7 years ago
parent
c82d7ea79a
commit
18e0d9afde
@ -0,0 +1,19 @@ |
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defmodule Explorer.Ethereum do |
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@client Application.get_env(:explorer, :ethereum)[:backend] |
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|
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defmodule API do |
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@moduledoc false |
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@callback download_balance(String.t()) :: String.t() |
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end |
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|
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defdelegate download_balance(hash), to: @client |
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|
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def decode_integer_field(hex) do |
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{"0x", base_16} = String.split_at(hex, 2) |
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String.to_integer(base_16, 16) |
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end |
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|
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def decode_time_field(field) do |
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field |> decode_integer_field() |> Timex.from_unix() |
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end |
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end |
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@ -0,0 +1,14 @@ |
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defmodule Explorer.Ethereum.Live do |
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@moduledoc """ |
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An implementation for Ethereum that uses the actual node. |
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""" |
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|
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@behaviour Explorer.Ethereum.API |
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|
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import Ethereumex.HttpClient, only: [eth_get_balance: 1] |
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def download_balance(hash) do |
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{:ok, result} = eth_get_balance(hash) |
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result |
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end |
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end |
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@ -0,0 +1,9 @@ |
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defmodule Explorer.Ethereum.Test do |
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@moduledoc """ |
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An interface for the Ethereum node that does not hit the network |
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""" |
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@behaviour Explorer.Ethereum.API |
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def download_balance(_hash) do |
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"0x15d231fca629c7c0" |
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end |
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end |
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@ -1,13 +0,0 @@ |
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defmodule Explorer.AddressForm do |
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@moduledoc false |
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|
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alias Explorer.Credit |
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alias Explorer.Debit |
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|
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def build(address) do |
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credit = address.credit || Credit.null() |
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debit = address.debit || Debit.null() |
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balance = Decimal.sub(credit.value, debit.value) |
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Map.put(address, :balance, balance) |
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end |
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end |
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@ -0,0 +1,18 @@ |
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defmodule Explorer.BalanceImporter do |
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@moduledoc "Imports a balance for a given address." |
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|
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alias Explorer.Address.Service, as: Address |
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alias Explorer.Ethereum |
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def import(hash) do |
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hash |
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|> Ethereum.download_balance() |
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|> persist_balance(hash) |
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end |
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|
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defp persist_balance(balance, hash) do |
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balance |
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|> Ethereum.decode_integer_field() |
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|> Address.update_balance(hash) |
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end |
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end |
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@ -0,0 +1,58 @@ |
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defmodule Explorer.Address.Service do |
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@moduledoc "Service module for interacting with Addresses" |
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|
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alias Explorer.Address |
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alias Explorer.Repo.NewRelic, as: Repo |
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alias Explorer.Address.Service.Query |
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|
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def by_hash(hash) do |
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Address |
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|> Query.by_hash(hash) |
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|> Query.include_credit_and_debit() |
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|> Repo.one() |
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end |
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|
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def update_balance(balance, hash) do |
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changes = %{ |
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balance: balance |
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} |
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|
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hash |
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|> find_or_create_by_hash() |
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|> Address.balance_changeset(changes) |
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|> Repo.update() |
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end |
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|
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def find_or_create_by_hash(hash) do |
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Address |
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|> Query.by_hash(hash) |
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|> Repo.one() |
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|> case do |
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nil -> Repo.insert!(Address.changeset(%Address{}, %{hash: hash})) |
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address -> address |
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end |
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end |
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|
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defmodule Query do |
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@moduledoc "Query module for pulling in aspects of Addresses." |
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import Ecto.Query, only: [from: 2] |
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def by_hash(query, hash) do |
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from( |
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q in query, |
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where: fragment("lower(?)", q.hash) == ^String.downcase(hash), |
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limit: 1 |
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) |
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end |
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|
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def include_credit_and_debit(query) do |
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from( |
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q in query, |
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left_join: credit in assoc(q, :credit), |
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left_join: debit in assoc(q, :debit), |
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preload: [:credit, :debit] |
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) |
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end |
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end |
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end |
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@ -0,0 +1,13 @@ |
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defmodule Explorer.Workers.ImportBalance do |
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@moduledoc "A worker that imports the balance for a given address." |
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alias Explorer.BalanceImporter |
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def perform(hash) do |
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BalanceImporter.import(hash) |
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end |
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def perform_later(hash) do |
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Exq.enqueue(Exq.Enqueuer, "balances", __MODULE__, [hash]) |
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end |
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end |
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@ -1,24 +1,10 @@ |
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defmodule ExplorerWeb.AddressController do |
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use ExplorerWeb, :controller |
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import Ecto.Query |
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alias Explorer.Address |
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alias Explorer.AddressForm |
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alias Explorer.Repo.NewRelic, as: Repo |
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alias Explorer.Address.Service, as: Address |
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def show(conn, %{"id" => id}) do |
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hash = String.downcase(id) |
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query = |
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from( |
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address in Address, |
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where: fragment("lower(?)", address.hash) == ^hash, |
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preload: [:credit, :debit], |
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limit: 1 |
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) |
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|
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address = Repo.one(query) |
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render(conn, "show.html", address: AddressForm.build(address)) |
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address = id |> Address.by_hash() |
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render(conn, "show.html", address: address) |
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end |
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end |
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|
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@ -1,4 +1,13 @@ |
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defmodule ExplorerWeb.AddressView do |
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use ExplorerWeb, :view |
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@dialyzer :no_match |
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def format_balance(nil), do: "0" |
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def format_balance(balance) do |
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balance |
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|> Decimal.new() |
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|> Decimal.div(Decimal.new(1_000_000_000_000_000_000)) |
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|> Decimal.to_string(:normal) |
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end |
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end |
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@ -0,0 +1,10 @@ |
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defmodule Explorer.Repo.Migrations.AddBalanceAndBalanceUpdatedAtToAddress do |
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use Ecto.Migration |
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def change do |
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alter table(:addresses) do |
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add :balance, :numeric, precision: 100 |
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add :balance_updated_at, :utc_datetime |
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end |
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end |
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end |
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@ -0,0 +1,18 @@ |
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defmodule Explorer.EthereumTest do |
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use Explorer.DataCase |
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alias Explorer.Ethereum |
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describe "decode_integer_field/1" do |
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test "returns the integer value of a hex value" do |
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assert(Ethereum.decode_integer_field("0x7f2fb") == 520_955) |
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end |
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end |
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describe "decode_time_field/1" do |
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test "returns the date value of a hex value" do |
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the_seventies = Timex.parse!("1970-01-01T00:00:18-00:00", "{ISO:Extended}") |
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assert(Ethereum.decode_time_field("0x12") == the_seventies) |
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end |
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end |
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end |
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@ -1,31 +0,0 @@ |
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defmodule Explorer.AddressFormTest do |
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use Explorer.DataCase |
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alias Explorer.AddressForm |
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alias Explorer.Credit |
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alias Explorer.Debit |
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describe "build/1" do |
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test "returns a balance" do |
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recipient = insert(:address) |
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transaction = insert(:transaction, value: 10, to_address_id: recipient.id) |
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block = insert(:block) |
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insert(:block_transaction, block: block, transaction: transaction) |
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insert(:receipt, transaction: transaction, status: 1) |
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Credit.refresh() |
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Debit.refresh() |
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assert AddressForm.build(Repo.preload(recipient, [:debit, :credit])).balance == |
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Decimal.new(10) |
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end |
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test "returns a zero balance when the address does not have balances" do |
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address = insert(:address, %{hash: "bert"}) |
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insert(:transaction, value: 5, to_address_id: address.id) |
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insert(:transaction, value: 5, to_address_id: address.id) |
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assert AddressForm.build(Repo.preload(address, [:debit, :credit])).balance == Decimal.new(0) |
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end |
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end |
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end |
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@ -0,0 +1,32 @@ |
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defmodule Explorer.BalanceImporterTest do |
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use Explorer.DataCase |
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alias Explorer.Address.Service, as: Address |
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alias Explorer.BalanceImporter |
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describe "import/1" do |
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test "it updates the balance for an address" do |
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insert(:address, hash: "0x5cc18cc34175d358ff8e19b7f98566263c4106a0", balance: 5) |
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BalanceImporter.import("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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address = Address.by_hash("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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assert address.balance == Decimal.new(1_572_374_181_095_000_000) |
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end |
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test "it updates the balance update time for an address" do |
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insert( |
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:address, |
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hash: "0x5cc18cc34175d358ff8e19b7f98566263c4106a0", |
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balance_updated_at: nil |
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) |
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BalanceImporter.import("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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address = Address.by_hash("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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refute is_nil(address.balance_updated_at) |
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end |
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test "it creates an address if one does not exist" do |
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BalanceImporter.import("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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assert Address.by_hash("0x5cc18cc34175d358ff8e19b7f98566263c4106a0") |
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end |
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end |
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end |
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@ -0,0 +1,56 @@ |
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defmodule Explorer.Address.ServiceTest do |
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use Explorer.DataCase |
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alias Explorer.Address.Service |
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alias Explorer.Address |
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describe "by_hash/1" do |
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test "it returns an address with that hash" do |
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address = insert(:address, hash: "0xandesmints") |
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result = Service.by_hash("0xandesmints") |
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assert result.id == address.id |
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end |
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end |
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describe "update_balance/2" do |
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test "it updates the balance" do |
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insert(:address, hash: "0xwarheads") |
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Service.update_balance(5, "0xwarheads") |
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result = Service.by_hash("0xwarheads") |
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assert result.balance == Decimal.new(5) |
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end |
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test "it updates the balance timestamp" do |
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insert(:address, hash: "0xtwizzlers") |
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Service.update_balance(88, "0xtwizzlers") |
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result = Service.by_hash("0xtwizzlers") |
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refute is_nil(result.balance_updated_at) |
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end |
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test "it creates an address if one does not exist" do |
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Service.update_balance(88, "0xtwizzlers") |
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result = Service.by_hash("0xtwizzlers") |
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assert result.balance == Decimal.new(88) |
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end |
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end |
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describe "find_or_create_by_hash/1" do |
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test "that it creates a new address when one does not exist" do |
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Service.find_or_create_by_hash("0xFreshPrince") |
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assert Service.by_hash("0xfreshprince") |
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end |
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test "when the address already exists it doesn't insert a new address" do |
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insert(:address, %{hash: "bigmouthbillybass"}) |
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Service.find_or_create_by_hash("bigmouthbillybass") |
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number_of_addresses = Address |> Repo.all() |> length |
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assert number_of_addresses == 1 |
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end |
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test "when there is no hash it blows up" do |
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assert_raise Ecto.InvalidChangesetError, fn -> |
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Service.find_or_create_by_hash("") |
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end |
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end |
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end |
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end |
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@ -0,0 +1,33 @@ |
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defmodule Explorer.Workers.ImportBalanceTest do |
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import Mock |
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alias Explorer.Workers.ImportBalance |
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alias Explorer.Address.Service, as: Address |
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use Explorer.DataCase |
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describe "perform/1" do |
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test "imports the balance for an address" do |
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ImportBalance.perform("0x1d12e5716c593b156eb7152ca4360f6224ba3b0a") |
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address = Address.by_hash("0x1d12e5716c593b156eb7152ca4360f6224ba3b0a") |
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assert address.balance == Decimal.new(1_572_374_181_095_000_000) |
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end |
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end |
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describe "perform_later/1" do |
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test "delays the import of the balance for an address" do |
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with_mock Exq, |
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enqueue: fn _, _, _, _ -> |
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insert( |
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:address, |
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hash: "0xskateboards", |
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balance: 66 |
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) |
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end do |
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ImportBalance.perform_later("0xskateboards") |
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address = Address.by_hash("0xskateboards") |
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assert address.balance == Decimal.new(66) |
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end |
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end |
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end |
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end |
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