Simple voting smart contract on SwissTron network

Short description

The contract allows owner to create Votings and add/remove voters which can vote in created Votings.

Owner can specify start timestamp of a Voting, duration and options to vote.

Voters can vote for one option in each active Voting. If voter changes a decision, they can re-vote or revoke a vote.

Contract address

Address: 0x1667F680B940754c2eB98D48cB82D40C7296F6a5

Use cases

Creating Votings

• By using function createVoting, Voter can create Votings with parameters:
  • array of options (may be simple strings as well as IPFS link);
  • timestamp of voting start;
  • voting duration
• After Voting start users with voter rights can cast their votes

Adding/Removing voters

• Owner can add one or many voters in one transaction (addVoter, addVoters)
• Owner can remove one or many voters in one transaction (removeVoter, removeVoters)

Voting

• Voter can vote for one option in one Voting (vote);
• Voter can re-vote a vote.
• Voter can revoke a vote (revokeVote).

Choosing vote winner

By using function getWonOption we can get info whether win option exists and if yes, what option index it has;

Tracking changes

By using function getVotingData you can get all necessary data about any Voting as:

• start timestamp;
• end timestamp;
• votes amount;
• array of options indexes(ids);
• array of options;
• array of votes;

The contract also has next functions:

• getOptionByIndex - returns option description by passed option index;
• getVotesAmount - returns votes amount;

Owner management

The contract inherits Ownable contract from Openzeppelin library. The Ownable contract allows to:

• leave the contract without owner;
• transfer owner ownership to another address(user/smart contract);

License

The smart contract has license: MIT (SPDX-License-Identifier: MIT)