create staking_pool schema

apps/explorer/lib/explorer/chain/staking_pool.ex

@@ -0,0 +1,73 @@
+defmodule Explorer.Chain.StakingPool do
+  @moduledoc """
+  The representation of staking pool from POSDAO network.
+  Staking pools might be candidate or validator.
+  """
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  alias Explorer.Chain.{
+    Wei,
+    Address,
+    Hash
+  }
+
+  @attrs ~w(
+    is_active delegators_count staked_amount self_staked_amount is_validator
+    was_validator_count is_banned was_banned_count banned_until likelihood
+    staked_ratio min_delegators_stake min_candidate_stake
+    staking_address_hash mining_address_hash
+  )a
+
+  schema "staking_pools" do
+    field(:banned_until, :integer)
+    field(:delegators_count, :integer)
+    field(:is_active, :boolean, default: false)
+    field(:is_banned, :boolean, default: false)
+    field(:is_validator, :boolean, default: false)
+    field(:likelihood, :decimal)
+    field(:staked_ratio, :decimal)
+    field(:min_candidate_stake, Wei)
+    field(:min_delegators_stake, Wei)
+    field(:self_staked_amount, Wei)
+    field(:staked_amount, Wei)
+    field(:was_banned_count, :integer)
+    field(:was_validator_count, :integer)
+
+    belongs_to(
+      :staking_address,
+      Address,
+      foreign_key: :staking_address_hash,
+      references: :hash,
+      type: Hash.Address
+    )
+
+    belongs_to(
+      :mining_address,
+      Address,
+      foreign_key: :mining_address_hash,
+      references: :hash,
+      type: Hash.Address
+    )
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(staking_pool, attrs) do
+    staking_pool
+    |> cast(attrs, @attrs)
+    |> validate_required(@attrs)
+    |> validate_staked_amount()
+  end
+
+  defp validate_staked_amount(%{valid?: false} = c), do: c
+
+  defp validate_staked_amount(changeset) do
+    if get_field(changeset, :staked_amount) < get_field(changeset, :self_staked_amount) do
+      add_error(changeset, :staked_amount, "must be greater than self_staked_amount")
+    else
+      changeset
+    end
+  end
+end

apps/explorer/priv/repo/migrations/20190521104412_create_staking_pools.exs

@@ -0,0 +1,28 @@
+defmodule Explorer.Repo.Migrations.CreateStakingPools do
+  use Ecto.Migration
+
+  def change do
+    create table(:staking_pools) do
+      add(:is_active, :boolean, default: false, null: false)
+      add(:delegators_count, :integer)
+      add(:staked_amount, :numeric, precision: 100)
+      add(:self_staked_amount, :numeric, precision: 100)
+      add(:is_validator, :boolean, default: false, null: false)
+      add(:was_validator_count, :integer)
+      add(:is_banned, :boolean, default: false, null: false)
+      add(:was_banned_count, :integer)
+      add(:banned_until, :bigint)
+      add(:likelihood, :decimal)
+      add(:staked_ratio, :decimal)
+      add(:min_delegators_stake, :numeric, precision: 100)
+      add(:min_candidate_stake, :numeric, precision: 100)
+      add(:staking_address_hash, references(:addresses, on_delete: :nothing, column: :hash, type: :bytea))
+      add(:mining_address_hash, references(:addresses, on_delete: :nothing, column: :hash, type: :bytea))
+
+      timestamps()
+    end
+
+    create(index(:staking_pools, [:staking_address_hash]))
+    create(index(:staking_pools, [:mining_address_hash]))
+  end
+end

apps/explorer/test/explorer/chain/staking_pool_test.exs

@@ -0,0 +1,18 @@
+defmodule Explorer.Chain.StakingPoolTest do
+  use Explorer.DataCase
+
+  alias Explorer.Chain.StakingPool
+
+  describe "changeset/2" do
+    test "with valid attributes" do
+      params = params_for(:staking_pool)
+      changeset = StakingPool.changeset(%StakingPool{}, params) |> IO.inspect()
+      assert changeset.valid?
+    end
+
+    test "with invalid attributes" do
+      changeset = StakingPool.changeset(%StakingPool{}, %{staking_address_hash: 0})
+      refute changeset.valid?
+    end
+  end
+end

apps/explorer/test/support/factory.ex

@@ -26,7 +26,8 @@ defmodule Explorer.Factory do
     SmartContract,
     Token,
     TokenTransfer,
-    Transaction
+    Transaction,
+    StakingPool
   }
 
   alias Explorer.Market.MarketHistory
@@ -611,22 +612,24 @@ defmodule Explorer.Factory do
   end
 
   def staking_pool_factory do
-    %{
-      address_hash: address_hash(),
-      metadata: %{
-        banned_unitil: 0,
-        delegators_count: 0,
-        is_active: true,
-        is_banned: false,
-        is_validator: true,
-        mining_address: address_hash(),
-        retries_count: 1,
-        staked_amount: 25,
-        was_banned_count: 0,
-        was_validator_count: 1
-      },
-      name: "anonymous",
-      primary: true
+    wei_per_ether = 1_000_000_000_000_000_000
+
+    %StakingPool{
+      staking_address_hash: address_hash(),
+      mining_address_hash: address_hash(),
+      banned_until: 0,
+      delegators_count: 0,
+      is_active: true,
+      is_banned: false,
+      is_validator: true,
+      staked_amount: wei_per_ether * 500,
+      self_staked_amount: wei_per_ether * 300,
+      was_banned_count: 0,
+      was_validator_count: 1,
+      min_delegators_stake: wei_per_ether * 100,
+      min_candidate_stake: wei_per_ether * 200,
+      staked_ratio: 0,
+      likelihood: 0,
     }
   end
 end