Operate your community-driven project using a DAO

Build a decentralized autonomous organization for your community where people can submit and then vote on proposals.

Write a DAO smart contract

Extending the OpenZeppelin Governor contract, we create a governance contract that let the community makes decisions for the protocol.
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
import "@openzeppelin/contracts/governance/Governor.sol";
import "@openzeppelin/contracts/governance/compatibility/GovernorCompatibilityBravo.sol";
import "@openzeppelin/contracts/governance/extensions/GovernorVotes.sol";
import "@openzeppelin/contracts/governance/extensions/GovernorVotesQuorumFraction.sol";
import "./ERC20Vote.sol";
contract GovernorVote is Governor, GovernorCompatibilityBravo, GovernorVotes, GovernorVotesQuorumFraction {
constructor(IVotes _token)
Governor("MyGovernor")
GovernorVotes(_token)
GovernorVotesQuorumFraction(4)
{}
function votingDelay() public pure override returns (uint256) {
return 20; // 20 blocks
}
function votingPeriod() public pure override returns (uint256) {
return 100; // 100 blocks
}
function proposalThreshold() public pure override returns (uint256) {
return 0;
}
// The functions below are overrides required by Solidity.
function state(uint256 proposalId)
public
view
override(Governor, IGovernor)
returns (ProposalState)
{
return super.state(proposalId);
}
function propose(address[] memory targets, uint256[] memory values, bytes[] memory calldatas, string memory description)
public
override(Governor, GovernorCompatibilityBravo)
returns (uint256)
{
return super.propose(targets, values, calldatas, description);
}
function _execute(uint256 proposalId, address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash)
internal
override(Governor)
{
super._execute(proposalId, targets, values, calldatas, descriptionHash);
}
function _cancel(address[] memory targets, uint256[] memory values, bytes[] memory calldatas, bytes32 descriptionHash)
internal
override(Governor)
returns (uint256)
{
return super._cancel(targets, values, calldatas, descriptionHash);
}
function _executor()
internal
view
override(Governor)
returns (address)
{
return super._executor();
}
function supportsInterface(bytes4 interfaceId)
public
view
override(Governor, IERC165)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
// override unused functions
function proposalEta(uint256) public pure override returns (uint256) {
return 0;
}
function timelock() public pure override returns (address) {
return address(0x0);
}
function queue(
address[] memory,
uint256[] memory,
bytes[] memory,
bytes32
) public pure override returns (uint256) {
return 0;
}
}
contract DAO is GovernorVote {
constructor() GovernorVote(new MyERC20VoteToken()) {
IERC20(address(token)).transfer(msg.sender, 1e22); // 10000 tokens
}
}

Clone the smart contract examples

We've prepared a few different examples for you to get started.
git clone https://github.com/trustlesscomputer/smart-contract-examples.git

Compile the contracts

To compile your contracts, use the built-in hardhat compile task.
cd smart-contract-examples
npm install
npx hardhat compile

Deploy the contracts

Review config file hardhat.config.ts. The network configs should look like this.
networks: {
mynw: {
url: "http://localhost:10002",
accounts: {
mnemonic: "<your mnemonic with funds>"
},
timeout: 100_000,
},
blockscoutVerify: {
blockscoutURL: "http://localhost:4000", // your explorer URL
...
}
}
Run the deploy scripts using hardhat-deploy.
npx hardhat deploy --tags DAO
Make sure the accounts in hardhat.config.ts have some TC in your Layer 2 that are bridged from Bitcoin Virtual Machine Layer 1.

Interact with the contracts

Once the contracts are deployed, you can interact with them. We've prepared a few hardhat tasks to make it easy for you to interact with the contracts.
npx hardhat createProposal --target <your-address-to-receive-funds> --value <proposal-amount> --description <proposal-description>
npx hardhat castVote --id <proposal-id> --vote <voting-amount>
npx hardhat getState --id <proposal-id>