# Voting System

#### Objective

To allow verified users to vote on DAO proposals based on their NFT holdings. One NFT equals one vote.

#### Logic

Each proposal has two counters: `votes_yes` and `votes_no`. When a verified user votes, their NFT balance determines the weight of their vote.

#### Mathematical Model

```
votes_yes = Σ NFT holdings of all "yes" voters
votes_no  = Σ NFT holdings of all "no" voters
```

#### Anchor Code

```
pub fn vote(ctx: Context<Vote>, proposal_id: u64, vote_yes: bool) -> Result<()> {
    let nft_account = &ctx.accounts.nft_account;
    let vote_weight = nft_account.amount;

    if vote_yes {
        ctx.accounts.proposal.votes_yes += vote_weight;
    } else {
        ctx.accounts.proposal.votes_no += vote_weight;
    }

    Ok(())
}

```

#### Security Notes

* Only verified NFT holders can call this function.
* All votes are transparently stored on-chain and cannot be altered.
* Prevents Sybil attacks, since voting power is proportional to NFT ownership.