blockscout/lib/explorer/log.ex

defmodule Explorer.Log do
  @moduledoc "Captures a Web3 log entry generated by a transaction"

  use Ecto.Schema

  import Ecto.Changeset

  alias Explorer.Address
  alias Explorer.Log
  alias Explorer.Receipt

  @timestamps_opts [
    type: Timex.Ecto.DateTime,
    autogenerate: {Timex.Ecto.DateTime, :autogenerate, []}
  ]

  @required_attrs ~w(index data type)a
  @optional_attrs ~w(
    first_topic second_topic third_topic fourth_topic address_id
  )a

  schema "logs" do
    belongs_to(:receipt, Receipt)
    belongs_to(:address, Address)
    has_one(:transaction, through: [:receipt, :transaction])
    field(:index, :integer)
    field(:data, :string)
    field(:type, :string)
    field(:first_topic, :string)
    field(:second_topic, :string)
    field(:third_topic, :string)
    field(:fourth_topic, :string)
    timestamps()
  end

  def changeset(%Log{} = log, attrs \\ %{}) do
    log
    |> cast(attrs, @required_attrs)
    |> cast(attrs, @optional_attrs)
    |> cast_assoc(:address)
    |> cast_assoc(:receipt)
    |> validate_required(@required_attrs)
  end
end