Initial commit

app/models/operations/liability.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+module Operations
+  # {Liability} is a balance sheet operation
+  class Liability < Operation
+    belongs_to :member
+
+    validates :member_id, presence: {
+      if: ->(liability) { liability.account.scope == 'member' }
+    }
+
+    validates :member_id, absence: {
+      if: ->(liability) { liability.account.scope != 'member' }
+    }
+
+    # Notify third party trading engine about member balance update.
+    after_commit on: :create do
+      AMQP::Queue.enqueue(:events_processor,
+                        subject: :operation,
+                        payload: as_json_for_events_processor)
+    end
+
+    def as_json_for_events_processor
+      { code:           code,
+        currency:       currency_id,
+        member_id:      member_id,
+        reference_id:   reference_id,
+        reference_type: reference_type&.downcase,
+        debit:          debit,
+        credit:         credit }
+    end
+  end
+end
+
+# == Schema Information
+# Schema version: 20201125134745
+#
+# Table name: liabilities
+#
+#  id             :integer          not null, primary key
+#  code           :integer          not null
+#  currency_id    :string(255)      not null
+#  member_id      :integer
+#  reference_type :string(255)
+#  reference_id   :integer
+#  debit          :decimal(32, 16)  default(0.0), not null
+#  credit         :decimal(32, 16)  default(0.0), not null
+#  created_at     :datetime         not null
+#  updated_at     :datetime         not null
+#
+# Indexes
+#
+#  index_liabilities_on_currency_id                      (currency_id)
+#  index_liabilities_on_member_id                        (member_id)
+#  index_liabilities_on_reference_type_and_reference_id  (reference_type,reference_id)
+#