Preventing Voter Fraud

The vote/yesVotes and vote/noVotes predicates hold all of the auth records that voted for or against a proposed change.

We need to make sure that only the owner of a given auth record adds their auth record to yes or no votes.

To do this, we can add a spec to both of these predicates, which ensures that users only cast votes with their own auth records.

The transaction will look as follows:

[
  {
    "_id": "_fn$ownAuth",
    "_fn/name": "ownAuth?",
    "_fn/code": "SMART FUNCTION CODE HERE"
  },
  {
    "_id": ["_predicate/name", "vote/yesVotes"],
    "spec": ["_fn$ownAuth"]
  },
  {
    "_id": ["_predicate/name", "vote/noVotes"],
    "spec": ["_fn$ownAuth"]
  }
]

It is your job to write the code of the smart function. Remember, we want to check whether the _auth we add to vote/yesVotes or vote/noVotes is your own _auth.

You will need one (or several) of these smart function to write, ownAuth?.

Function	Arguments	Example
inc	n optional	(inc)
dec	n optional	(dec)
==	arg1 arg2 ...	(== 1 1 1 1)
+	arg1 arg2 ...	(+ 1 2 3)
-	arg1 arg2 ...	(- 10 9 3)
*	arg1 arg2 ...	(* 90 10 2)
/	arg1 arg2 ...	(/ 36 3 4)
>	arg1 arg2 ...	(> 90 10 2)
<	arg1 arg2 ...	(< 90 10 2)
>=	arg1 arg2 ...	(>= 90 90 10 2)
<	arg1 arg2 ...	(< 2 10 90)
<=	arg1 arg2 ...	(<= 2 10 90 90)
max	arg1 arg2 ...	(max 1 2 3)
min	arg1 arg2 ...	(min 1 2 3)

You will also need several context-specific functions. Note, you may not need all of these functions:

• (?sid): The _id for the subject being updated.
• (?auth_id) : The _id of the auth making the update.
• (?user_id) : The _id of the user making the update.
• (?o): Tthe object (value) of the predicate that is being edited.

Write the Smart Function!

Using the above instructions, write the smart function code for ownAuth