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JavaScript

const { BN, expectEvent, expectRevert } = require('@openzeppelin/test-helpers');
const { expect } = require('chai');
const ethSigUtil = require('eth-sig-util');
const Wallet = require('ethereumjs-wallet').default;
const { fromRpcSig } = require('ethereumjs-util');
const Enums = require('../helpers/enums');
const { EIP712Domain } = require('../helpers/eip712');
const { GovernorHelper } = require('../helpers/governance');
const { shouldSupportInterfaces } = require('../utils/introspection/SupportsInterface.behavior');
const Token = artifacts.require('$ERC20Votes');
const Governor = artifacts.require('$GovernorMock');
const CallReceiver = artifacts.require('CallReceiverMock');
const ERC721 = artifacts.require('$ERC721');
const ERC1155 = artifacts.require('$ERC1155');
contract('Governor', function (accounts) {
const [owner, proposer, voter1, voter2, voter3, voter4] = accounts;
const empty = web3.utils.toChecksumAddress(web3.utils.randomHex(20));
const name = 'OZ-Governor';
const version = '1';
const tokenName = 'MockToken';
const tokenSymbol = 'MTKN';
const tokenSupply = web3.utils.toWei('100');
const votingDelay = new BN(4);
const votingPeriod = new BN(16);
const value = web3.utils.toWei('1');
beforeEach(async function () {
this.chainId = await web3.eth.getChainId();
this.token = await Token.new(tokenName, tokenSymbol, tokenName);
this.mock = await Governor.new(
name, // name
votingDelay, // initialVotingDelay
votingPeriod, // initialVotingPeriod
0, // initialProposalThreshold
this.token.address, // tokenAddress
10, // quorumNumeratorValue
);
this.receiver = await CallReceiver.new();
this.helper = new GovernorHelper(this.mock);
await web3.eth.sendTransaction({ from: owner, to: this.mock.address, value });
await this.token.$_mint(owner, tokenSupply);
await this.helper.delegate({ token: this.token, to: voter1, value: web3.utils.toWei('10') }, { from: owner });
await this.helper.delegate({ token: this.token, to: voter2, value: web3.utils.toWei('7') }, { from: owner });
await this.helper.delegate({ token: this.token, to: voter3, value: web3.utils.toWei('5') }, { from: owner });
await this.helper.delegate({ token: this.token, to: voter4, value: web3.utils.toWei('2') }, { from: owner });
this.proposal = this.helper.setProposal(
[
{
target: this.receiver.address,
data: this.receiver.contract.methods.mockFunction().encodeABI(),
value,
},
],
'<proposal description>',
);
});
shouldSupportInterfaces(['ERC165', 'ERC1155Receiver', 'Governor', 'GovernorWithParams']);
it('deployment check', async function () {
expect(await this.mock.name()).to.be.equal(name);
expect(await this.mock.token()).to.be.equal(this.token.address);
expect(await this.mock.votingDelay()).to.be.bignumber.equal(votingDelay);
expect(await this.mock.votingPeriod()).to.be.bignumber.equal(votingPeriod);
expect(await this.mock.quorum(0)).to.be.bignumber.equal('0');
expect(await this.mock.COUNTING_MODE()).to.be.equal('support=bravo&quorum=for,abstain');
});
it('nominal workflow', async function () {
// Before
expect(await this.mock.hasVoted(this.proposal.id, owner)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voter1)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voter2)).to.be.equal(false);
expect(await web3.eth.getBalance(this.mock.address)).to.be.bignumber.equal(value);
expect(await web3.eth.getBalance(this.receiver.address)).to.be.bignumber.equal('0');
// Run proposal
const txPropose = await this.helper.propose({ from: proposer });
expectEvent(txPropose, 'ProposalCreated', {
proposalId: this.proposal.id,
proposer,
targets: this.proposal.targets,
// values: this.proposal.values,
signatures: this.proposal.signatures,
calldatas: this.proposal.data,
startBlock: new BN(txPropose.receipt.blockNumber).add(votingDelay),
endBlock: new BN(txPropose.receipt.blockNumber).add(votingDelay).add(votingPeriod),
description: this.proposal.description,
});
await this.helper.waitForSnapshot();
expectEvent(
await this.helper.vote({ support: Enums.VoteType.For, reason: 'This is nice' }, { from: voter1 }),
'VoteCast',
{
voter: voter1,
support: Enums.VoteType.For,
reason: 'This is nice',
weight: web3.utils.toWei('10'),
},
);
expectEvent(await this.helper.vote({ support: Enums.VoteType.For }, { from: voter2 }), 'VoteCast', {
voter: voter2,
support: Enums.VoteType.For,
weight: web3.utils.toWei('7'),
});
expectEvent(await this.helper.vote({ support: Enums.VoteType.Against }, { from: voter3 }), 'VoteCast', {
voter: voter3,
support: Enums.VoteType.Against,
weight: web3.utils.toWei('5'),
});
expectEvent(await this.helper.vote({ support: Enums.VoteType.Abstain }, { from: voter4 }), 'VoteCast', {
voter: voter4,
support: Enums.VoteType.Abstain,
weight: web3.utils.toWei('2'),
});
await this.helper.waitForDeadline();
const txExecute = await this.helper.execute();
expectEvent(txExecute, 'ProposalExecuted', { proposalId: this.proposal.id });
await expectEvent.inTransaction(txExecute.tx, this.receiver, 'MockFunctionCalled');
// After
expect(await this.mock.hasVoted(this.proposal.id, owner)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voter1)).to.be.equal(true);
expect(await this.mock.hasVoted(this.proposal.id, voter2)).to.be.equal(true);
expect(await web3.eth.getBalance(this.mock.address)).to.be.bignumber.equal('0');
expect(await web3.eth.getBalance(this.receiver.address)).to.be.bignumber.equal(value);
});
it('vote with signature', async function () {
const voterBySig = Wallet.generate();
const voterBySigAddress = web3.utils.toChecksumAddress(voterBySig.getAddressString());
const signature = async message => {
return fromRpcSig(
ethSigUtil.signTypedMessage(voterBySig.getPrivateKey(), {
data: {
types: {
EIP712Domain,
Ballot: [
{ name: 'proposalId', type: 'uint256' },
{ name: 'support', type: 'uint8' },
],
},
domain: { name, version, chainId: this.chainId, verifyingContract: this.mock.address },
primaryType: 'Ballot',
message,
},
}),
);
};
await this.token.delegate(voterBySigAddress, { from: voter1 });
// Run proposal
await this.helper.propose();
await this.helper.waitForSnapshot();
expectEvent(await this.helper.vote({ support: Enums.VoteType.For, signature }), 'VoteCast', {
voter: voterBySigAddress,
support: Enums.VoteType.For,
});
await this.helper.waitForDeadline();
await this.helper.execute();
// After
expect(await this.mock.hasVoted(this.proposal.id, owner)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voter1)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voter2)).to.be.equal(false);
expect(await this.mock.hasVoted(this.proposal.id, voterBySigAddress)).to.be.equal(true);
});
it('send ethers', async function () {
this.proposal = this.helper.setProposal(
[
{
target: empty,
value,
},
],
'<proposal description>',
);
// Before
expect(await web3.eth.getBalance(this.mock.address)).to.be.bignumber.equal(value);
expect(await web3.eth.getBalance(empty)).to.be.bignumber.equal('0');
// Run proposal
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await this.helper.execute();
// After
expect(await web3.eth.getBalance(this.mock.address)).to.be.bignumber.equal('0');
expect(await web3.eth.getBalance(empty)).to.be.bignumber.equal(value);
});
describe('should revert', function () {
describe('on propose', function () {
it('if proposal already exists', async function () {
await this.helper.propose();
await expectRevert(this.helper.propose(), 'Governor: proposal already exists');
});
});
describe('on vote', function () {
it('if proposal does not exist', async function () {
await expectRevert(
this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 }),
'Governor: unknown proposal id',
);
});
it('if voting has not started', async function () {
await this.helper.propose();
await expectRevert(
this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 }),
'Governor: vote not currently active',
);
});
it('if support value is invalid', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await expectRevert(
this.helper.vote({ support: new BN('255') }),
'GovernorVotingSimple: invalid value for enum VoteType',
);
});
it('if vote was already casted', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await expectRevert(
this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 }),
'GovernorVotingSimple: vote already cast',
);
});
it('if voting is over', async function () {
await this.helper.propose();
await this.helper.waitForDeadline();
await expectRevert(
this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 }),
'Governor: vote not currently active',
);
});
});
describe('on execute', function () {
it('if proposal does not exist', async function () {
await expectRevert(this.helper.execute(), 'Governor: unknown proposal id');
});
it('if quorum is not reached', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter3 });
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
it('if score not reached', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.Against }, { from: voter1 });
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
it('if voting is not over', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
it('if receiver revert without reason', async function () {
this.proposal = this.helper.setProposal(
[
{
target: this.receiver.address,
data: this.receiver.contract.methods.mockFunctionRevertsNoReason().encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await expectRevert(this.helper.execute(), 'Governor: call reverted without message');
});
it('if receiver revert with reason', async function () {
this.proposal = this.helper.setProposal(
[
{
target: this.receiver.address,
data: this.receiver.contract.methods.mockFunctionRevertsReason().encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await expectRevert(this.helper.execute(), 'CallReceiverMock: reverting');
});
it('if proposal was already executed', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await this.helper.execute();
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
});
});
describe('state', function () {
it('Unset', async function () {
await expectRevert(this.mock.state(this.proposal.id), 'Governor: unknown proposal id');
});
it('Pending & Active', async function () {
await this.helper.propose();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Pending);
await this.helper.waitForSnapshot();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Pending);
await this.helper.waitForSnapshot(+1);
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Active);
});
it('Defeated', async function () {
await this.helper.propose();
await this.helper.waitForDeadline();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Active);
await this.helper.waitForDeadline(+1);
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Defeated);
});
it('Succeeded', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Active);
await this.helper.waitForDeadline(+1);
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Succeeded);
});
it('Executed', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await this.helper.execute();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Executed);
});
});
describe('cancel', function () {
it('before proposal', async function () {
await expectRevert(this.helper.cancel(), 'Governor: unknown proposal id');
});
it('after proposal', async function () {
await this.helper.propose();
await this.helper.cancel();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Canceled);
await this.helper.waitForSnapshot();
await expectRevert(
this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 }),
'Governor: vote not currently active',
);
});
it('after vote', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.cancel();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Canceled);
await this.helper.waitForDeadline();
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
it('after deadline', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await this.helper.cancel();
expect(await this.mock.state(this.proposal.id)).to.be.bignumber.equal(Enums.ProposalState.Canceled);
await expectRevert(this.helper.execute(), 'Governor: proposal not successful');
});
it('after execution', async function () {
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await this.helper.execute();
await expectRevert(this.helper.cancel(), 'Governor: proposal not active');
});
});
describe('proposal length', function () {
it('empty', async function () {
this.helper.setProposal([], '<proposal description>');
await expectRevert(this.helper.propose(), 'Governor: empty proposal');
});
it('mismatch #1', async function () {
this.helper.setProposal(
{
targets: [],
values: [web3.utils.toWei('0')],
data: [this.receiver.contract.methods.mockFunction().encodeABI()],
},
'<proposal description>',
);
await expectRevert(this.helper.propose(), 'Governor: invalid proposal length');
});
it('mismatch #2', async function () {
this.helper.setProposal(
{
targets: [this.receiver.address],
values: [],
data: [this.receiver.contract.methods.mockFunction().encodeABI()],
},
'<proposal description>',
);
await expectRevert(this.helper.propose(), 'Governor: invalid proposal length');
});
it('mismatch #3', async function () {
this.helper.setProposal(
{
targets: [this.receiver.address],
values: [web3.utils.toWei('0')],
data: [],
},
'<proposal description>',
);
await expectRevert(this.helper.propose(), 'Governor: invalid proposal length');
});
});
describe('onlyGovernance updates', function () {
it('setVotingDelay is protected', async function () {
await expectRevert(this.mock.setVotingDelay('0'), 'Governor: onlyGovernance');
});
it('setVotingPeriod is protected', async function () {
await expectRevert(this.mock.setVotingPeriod('32'), 'Governor: onlyGovernance');
});
it('setProposalThreshold is protected', async function () {
await expectRevert(this.mock.setProposalThreshold('1000000000000000000'), 'Governor: onlyGovernance');
});
it('can setVotingDelay through governance', async function () {
this.helper.setProposal(
[
{
target: this.mock.address,
data: this.mock.contract.methods.setVotingDelay('0').encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
expectEvent(await this.helper.execute(), 'VotingDelaySet', { oldVotingDelay: '4', newVotingDelay: '0' });
expect(await this.mock.votingDelay()).to.be.bignumber.equal('0');
});
it('can setVotingPeriod through governance', async function () {
this.helper.setProposal(
[
{
target: this.mock.address,
data: this.mock.contract.methods.setVotingPeriod('32').encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
expectEvent(await this.helper.execute(), 'VotingPeriodSet', { oldVotingPeriod: '16', newVotingPeriod: '32' });
expect(await this.mock.votingPeriod()).to.be.bignumber.equal('32');
});
it('cannot setVotingPeriod to 0 through governance', async function () {
this.helper.setProposal(
[
{
target: this.mock.address,
data: this.mock.contract.methods.setVotingPeriod('0').encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
await expectRevert(this.helper.execute(), 'GovernorSettings: voting period too low');
});
it('can setProposalThreshold to 0 through governance', async function () {
this.helper.setProposal(
[
{
target: this.mock.address,
data: this.mock.contract.methods.setProposalThreshold('1000000000000000000').encodeABI(),
},
],
'<proposal description>',
);
await this.helper.propose();
await this.helper.waitForSnapshot();
await this.helper.vote({ support: Enums.VoteType.For }, { from: voter1 });
await this.helper.waitForDeadline();
expectEvent(await this.helper.execute(), 'ProposalThresholdSet', {
oldProposalThreshold: '0',
newProposalThreshold: '1000000000000000000',
});
expect(await this.mock.proposalThreshold()).to.be.bignumber.equal('1000000000000000000');
});
});
describe('safe receive', function () {
describe('ERC721', function () {
const name = 'Non Fungible Token';
const symbol = 'NFT';
const tokenId = new BN(1);
beforeEach(async function () {
this.token = await ERC721.new(name, symbol);
await this.token.$_mint(owner, tokenId);
});
it('can receive an ERC721 safeTransfer', async function () {
await this.token.safeTransferFrom(owner, this.mock.address, tokenId, { from: owner });
});
});
describe('ERC1155', function () {
const uri = 'https://token-cdn-domain/{id}.json';
const tokenIds = {
1: new BN(1000),
2: new BN(2000),
3: new BN(3000),
};
beforeEach(async function () {
this.token = await ERC1155.new(uri);
await this.token.$_mintBatch(owner, Object.keys(tokenIds), Object.values(tokenIds), '0x');
});
it('can receive ERC1155 safeTransfer', async function () {
await this.token.safeTransferFrom(
owner,
this.mock.address,
...Object.entries(tokenIds)[0], // id + amount
'0x',
{ from: owner },
);
});
it('can receive ERC1155 safeBatchTransfer', async function () {
await this.token.safeBatchTransferFrom(
owner,
this.mock.address,
Object.keys(tokenIds),
Object.values(tokenIds),
'0x',
{ from: owner },
);
});
});
});
});