diff --git a/app/models/wallet.rb b/app/models/wallet.rb
index 987db9e8..e7e78671 100644
--- a/app/models/wallet.rb
+++ b/app/models/wallet.rb
@@ -1,2 +1,6 @@
 class Wallet < ApplicationRecord
+  belongs_to :user
+  has_many :outcome, class_name: 'CoinChange', foreign_key: 'from_wallet_id', dependent: :destroy
+  has_many :income, class_name: 'CoinChange', foreign_key: 'to_wallet_id', dependent: :destroy
+  validates :balance, presence: true
 end