Hello, blockchain adventurers! Today, we're stepping into the realm of Decentralized Autonomous Organizations, or DAOs. We'll walk you through creating a DAO smart contract in Solidity and conduct integration testing using Foundry. This guide is designed for clarity and ease of understanding, whether you're a seasoned developer or just starting.
What is a DAO?
A DAO is an organization represented by rules encoded as a computer program that is transparent, controlled by the organization members, and not influenced by a central government. DAOs are the epitome of blockchain's ethos of decentralization. Image Placeholder: Conceptual Illustration of a DAO
Setting Up Your Development Environment
First off, make sure you have Foundry installed. It's a robust Ethereum development toolkit. Install it with:
curl -L https://foundry.paradigm.xyz | bash foundryup }
Writing a DAO Smart Contract
Our DAO contract will allow members to submit proposals, vote on them, and execute the proposal if it passes.
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract SimpleDAO {
struct Proposal {
string description;
uint voteCount;
bool executed;
}
address public owner;
mapping(address => bool) public members;
Proposal[] public proposals;
modifier onlyMember() {
require(members[msg.sender], "Not a member");
_;
}
constructor() {
owner = msg.sender;
members[msg.sender] = true; // Initial member
}
function addMember(address member) public {
require(msg.sender == owner, "Only owner can add members");
members[member] = true;
}
function submitProposal(string memory description) public onlyMember {
proposals.push(Proposal({
description: description,
voteCount: 0,
executed: false
}));
}
function voteOnProposal(uint proposalIndex) public onlyMember {
Proposal storage proposal = proposals[proposalIndex];
require(!proposal.executed, "Proposal already executed");
proposal.voteCount += 1;
}
function executeProposal(uint proposalIndex) public onlyMember {
Proposal storage proposal = proposals[proposalIndex];
require(!proposal.executed, "Proposal already executed");
require(proposal.voteCount > 1, "Not enough votes"); // Simple majority
proposal.executed = true;
// Execute proposal logic (not implemented for simplicity)
}
}Integration Testing with Foundry
Now, let's write integration tests to ensure our DAO functions correctly.
Writing Integration Tests
Our tests will cover adding members, submitting proposals, voting, and executing proposals. solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "ds-test/test.sol";
import "../src/SimpleDAO.sol";
contract SimpleDAOTest is DSTest {
SimpleDAO dao;
function setUp() public {
dao = new SimpleDAO();
dao.addMember(address(this)); // Add the test contract as a member
}
function testAddMember() public {
dao.addMember(address(1)); // Add a new member
assertTrue(dao.members(address(1)), "Member should be added");
}
function testSubmitProposal() public {
dao.submitProposal("Proposal 1");
assertEq(dao.proposals(0).description, "Proposal 1", "Proposal should be submitted");
}
function testVoteAndExecuteProposal() public {
dao.submitProposal("Proposal 1");
dao.voteOnProposal(0);
dao.executeProposal(0);
assertTrue(dao.proposals(0).executed, "Proposal should be executed");
}
}Running the Tests
Run the tests with the following command in your Foundry setup:
forge test
This will execute the tests, ensuring that your DAO behaves as expected.
Conclusion
And there you have it! You've just created a basic DAO and tested its core functionalities. Remember, DAOs are a powerful concept in blockchain, and this is just the beginning. Experiment with more complex proposals and voting mechanisms to expand your understanding.
Happy coding, and may your journey into decentralized organizations be enlightening!
