Realtime database rules for Money Monitor

gistfile1.txt

{
  "rules": {
    ".read": false,
    ".write": false,
    "users" : {
      "$user_id" : {
        ".read": "$user_id === auth.uid",
        ".write": "$user_id === auth.uid",
          "firstRun": {
            ".validate": "newData.isBoolean()"
          },
        	"expenses": {
            "$expense_id": {
              ".validate": "newData.hasChildren(['title', 'note','createdAt', 'amount'])",
              "title": {
                ".validate": "newData.isString() && newData.val().length > 0"
              },
              "note": {
                ".validate": "newData.isString()"
              },
              "createdAt": {
                ".validate": "newData.isNumber()"
              },
              "amount": {
                ".validate": "newData.isNumber()"
              },
              "category" : {
                ".validate": "newData.isString()"
              },
              "$other": {
          		".validate": false
          		}
            }
        	},
          "savings": {
            "$saving_id": {
              ".validate" : "newData.hasChildren(['title', 'goal', 'amount'])",
              "title": {
                ".validate": "newData.isString() && newData.val().length > 0"
              },
              "goal": {
                ".validate": "newData.isNumber()"
              },
              "amount": {
                ".validate": "newData.isNumber()"
              },
              "$other": {
          		".validate": false
          		}
            }
          },
          "preferences": {
            "currency": {
              ".validate" : "newData.isString() && newData.val().length > 0"
            },
            "userCategories" : {
              "$userCategory_id" : {
                ".validate": "newData.hasChildren(['name'])",
                "name" : {
                  ".validate": "newData.isString() && newData.val().length > 0"
                },
                "$other": {
          				".validate": false
          			}
              }
            },
            "theme" : {
              ".validate" : "newData.isString() && newData.val().length > 0"
            },
            "$other": {
          		".validate": false
          	}
          },
          "$other": {
          	".validate": false
          }
      }
    }
  }
}