leo/examples/vote/README.md

<!-- # 🗳️ Vote -->
<img alt="workshop/vote" width="1412" src="../.resources/vote.png">

## Summary

`vote.leo` is a general vote program.

Anyone can issue new proposals, 
proposers can issue tickets to the voters, 
and voters can vote without exposing their identity.

This example is inspired by the [aleo-vote](https://github.com/zkprivacy/aleo-vote) example written by the Aleo community.

## Noteworthy Features

Voter identity is concealed by privately passing a voter's ballot into a function.
Proposal information and voting results are revealed using the public `mapping` datatype in Leo.

## How to Run

To compile this Leo program, run:
```bash
leo build
```

Make changes to `vote/inputs/vote.in` before running each command.

### Propose

Anyone can issue a new proposal publicly by calling `propose` function.

Run `propose`:

```
leo run propose
```

Output sample:

```
 {
  owner: aleo1kkk52quhnxgn2nfrcd9jqk7c9x27c23f2wvw7fyzcze56yahvcgszgttu2.private,
  gates: 0u64.private,
  id: 2805252584833208809872967597325381727971256629741137995614832105537063464740field.private,
  info: {
    title: 2077160157502449938194577302446444field.private,
    content: 1452374294790018907888397545906607852827800436field.private,
    proposer: aleo1kkk52quhnxgn2nfrcd9jqk7c9x27c23f2wvw7fyzcze56yahvcgszgttu2.private
  },
  _nonce: 1639660347839832220966145410710039205878572956621820215177036061076060242021group.public
}
```

### Create Ticket

Proposers can create new tickets for proposed proposals.

Ticket is a record with `owner` and `pid`, 
it can be used to vote for the specific proposal - `pid`, 
and can only be used(voted) by the ticket `owner`.

Run `new_ticket`:

```
leo run new_ticket
```

Output sample:

```
{
  owner: aleo1kkk52quhnxgn2nfrcd9jqk7c9x27c23f2wvw7fyzcze56yahvcgszgttu2.private,
  gates: 0u64.private,
  pid: 2264670486490520844857553240576860973319410481267184439818180411609250173817field.private,
  _nonce: 1637267040221574073903539416642641433705357302885235345311606754421919550724group.public
}
```

### Vote

A ticket owner can use their ticket record to vote `agree` / `disagree` with the specific proposal - `pid`.

Since the ticket record can be used as an input privately, the voter's privacy is protected.

Run `agree`:

```
leo run agree
```

Run `disagree`:

```
leo run disagree
```