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PreserveBalancesOnTransferToken.test.js
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PreserveBalancesOnTransferToken.test.js
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const BigNumber = web3.BigNumber;
const PreserveBalancesOnTransferToken = artifacts.require('PreserveBalancesOnTransferToken');
const PreserveBalancesMock = artifacts.require('PreserveBalancesMock');
const SnapshotToken = artifacts.require('SnapshotToken');
// Increases ganache time by the passed duration in seconds
function increaseTime (duration) {
const id = Date.now();
return new Promise((resolve, reject) => {
web3.currentProvider.sendAsync({
jsonrpc: '2.0',
method: 'evm_increaseTime',
params: [duration],
id: id,
}, err1 => {
if (err1) return reject(err1);
web3.currentProvider.sendAsync({
jsonrpc: '2.0',
method: 'evm_mine',
id: id + 1,
}, (err2, res) => {
return err2 ? reject(err2) : resolve(res);
});
});
});
}
function increaseTimeTo (target) {
const now = web3.eth.getBlock('latest').timestamp;
if (target < now) throw Error(`Cannot increase current time(${now}) to a moment in the past(${target})`);
const diff = target - now;
return increaseTime(diff);
}
const duration = {
seconds: function (val) { return val; },
minutes: function (val) { return val * this.seconds(60); },
hours: function (val) { return val * this.minutes(60); },
days: function (val) { return val * this.hours(24); },
weeks: function (val) { return val * this.days(7); },
years: function (val) { return val * this.days(365); },
};
require('chai')
.use(require('chai-as-promised'))
.use(require('chai-bignumber')(BigNumber))
.should();
contract('PreserveBalancesOnTransferToken', (accounts) => {
const creator = accounts[0];
const account3 = accounts[3];
const account4 = accounts[4];
const account5 = accounts[5];
beforeEach(async function () {
});
describe('mint', function () {
it('should fail due to not owner call', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[1], 1000,
{ from: web3.eth.accounts[1] }).should.be.rejectedWith('revert');
});
it('should fail with isMintable = false', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[1], 1000);
});
it('should fail due to finishMinting() call', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.finishMinting();
await this.token.mint(web3.eth.accounts[1], 1000).should.be.rejectedWith('revert');
});
it('should pass', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[0], 1000);
const balance = await this.token.balanceOf(web3.eth.accounts[0]);
assert.equal(balance.toNumber(), 1000);
});
});
describe('burn', function () {
it('should fail due to not owner call', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[1], 1000);
await this.token.burn(1000, { from: web3.eth.accounts[0] }).should.be.rejectedWith('revert');
});
it('should fail due to not enough tokens in the address provided', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.burn(1000).should.be.rejectedWith('revert');
});
it('should pass', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[0], 1000);
await this.token.burn(1000);
const balance = await this.token.balanceOf(web3.eth.accounts[0]);
assert.equal(balance.toNumber(), 0);
});
});
describe('startNewEvent', function () {
it('should allow to create many separate events', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.startNewEvent().should.be.fulfilled;// 1
await this.token.startNewEvent().should.be.fulfilled;// 2
});
it('should not be possible to call by non-owner', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.startNewEvent({ from: account3 }).should.be.rejectedWith('revert');
});
});
describe('getBalanceAtEventStart', function () {
it('should preserve balances if no transfers happened after event is started', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account4, 1);
const account4Balance = await this.token.balanceOf(account4);
const account5Balance = await this.token.balanceOf(account5);
assert.equal(account4Balance.toNumber(), 1);
assert.equal(account5Balance.toNumber(), 0);
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
const account4EventBalance = await this.token.getBalanceAtEventStart(eventID, account4);
const account5EventBalance = await this.token.getBalanceAtEventStart(eventID, account5);
assert.equal(account4EventBalance.toNumber(), 1);
assert.equal(account5EventBalance.toNumber(), 0);
});
it('should preserve balances after event is started', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account4, 1);
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.transfer(account5, 1, { from: account4 });
const account4Balance = await this.token.balanceOf(account4);
const account5Balance = await this.token.balanceOf(account5);
const account4EventBalance = await this.token.getBalanceAtEventStart(eventID, account4);
const account5EventBalance = await this.token.getBalanceAtEventStart(eventID, account5);
assert.equal(account4Balance.toNumber(), 0);
assert.equal(account5Balance.toNumber(), 1);
assert.equal(account4EventBalance.toNumber(), 1);
assert.equal(account5EventBalance.toNumber(), 0);
});
it('should preserve balances after event is started and mint called', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.mint(account4, 1);
const account4Balance = await this.token.balanceOf(account4);
const account4EventBalance = await this.token.getBalanceAtEventStart(eventID, account4);
assert.equal(account4Balance.toNumber(), 1);
assert.equal(account4EventBalance.toNumber(), 0);
});
it('should throw exception when trying to check balancesAtVoting after event is ended', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account4, 1);
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.transfer(account5, 1, { from: account4 });
let account4Balance = await this.token.balanceOf(account4);
let account5Balance = await this.token.balanceOf(account5);
assert.equal(account4Balance.toNumber(), 0);
assert.equal(account5Balance.toNumber(), 1);
await this.token.finishEvent(eventID);
account4Balance = await this.token.balanceOf(account4);
account5Balance = await this.token.balanceOf(account5);
assert.equal(account4Balance.toNumber(), 0);
assert.equal(account5Balance.toNumber(), 1);
await this.token.getBalanceAtEventStart(eventID, account4).should.be.rejectedWith('revert');
});
it('should preserve balances after event is started and transferFrom is called', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account4, 1);
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.approve(account3, 1, { from: account4 });
await this.token.transferFrom(account4, account5, 1, { from: account3 });
const account4Balance = await this.token.balanceOf(account4);
const account5Balance = await this.token.balanceOf(account5);
const account4EventBalance = await this.token.getBalanceAtEventStart(eventID, account4);
const account5EventBalance = await this.token.getBalanceAtEventStart(eventID, account5);
assert.equal(account4Balance.toNumber(), 0);
assert.equal(account5Balance.toNumber(), 1);
assert.equal(account4EventBalance.toNumber(), 1);
assert.equal(account5EventBalance.toNumber(), 0);
});
it('should throw exception because event is not started yet', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[0], 1000);
await this.token.getBalanceAtEventStart(0, web3.eth.accounts[0]).should.be.rejectedWith('revert');
});
it('should work correctly if time passed and new event is started', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account3, 100);
await this.token.mint(account4, 20);
// 1 - create event 1
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID1 = events.filter(e => e.args._address === creator)[0].args._eventID;
// 2 - transfer tokens
await this.token.transfer(account5, 5, { from: account3 });
await this.token.transfer(account5, 7, { from: account4 });
assert.equal(await this.token.balanceOf(account3), 95);
assert.equal(await this.token.balanceOf(account4), 13);
assert.equal(await this.token.balanceOf(account5), 12);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account3), 100);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account4), 20);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account5), 0);
// 3 - finish event
await this.token.finishEvent(eventID1);
// 4 - increase time
const now = web3.eth.getBlock('latest').timestamp;
await increaseTimeTo(now + duration.seconds(1));
// 5 - create event 2
const tx2 = await this.token.startNewEvent();
const events2 = tx2.logs.filter(l => l.event === 'EventStarted');
const eventID2 = events2.filter(e => e.args._address === creator)[0].args._eventID;
// 6 - CHECK BALANCES
assert.equal(await this.token.balanceOf(account3), 95);
assert.equal(await this.token.balanceOf(account4), 13);
assert.equal(await this.token.balanceOf(account5), 12);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account3), 95);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account4), 13);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account5), 12);
// 7 - transfer tokens again
await this.token.transfer(account5, 2, { from: account3 });
await this.token.transfer(account5, 1, { from: account4 });
// 8 - CHECK BALANCES again
assert.equal(await this.token.balanceOf(account3), 93);
assert.equal(await this.token.balanceOf(account4), 12);
assert.equal(await this.token.balanceOf(account5), 15);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account3), 95);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account4), 13);
assert.equal(await this.token.getBalanceAtEventStart(eventID2, account5), 12);
// 9 - finish event
await this.token.finishEvent(eventID2);
});
// That is a feature, not a bug!
it('should work correctly if time NOT passed and new event is started', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account3, 100);
await this.token.mint(account4, 20);
// 1 - create event 1
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID1 = events.filter(e => e.args._address === creator)[0].args._eventID;
// 2 - transfer tokens
await this.token.transfer(account5, 5, { from: account3 });
await this.token.transfer(account5, 7, { from: account4 });
assert.equal(await this.token.balanceOf(account3), 95);
assert.equal(await this.token.balanceOf(account4), 13);
assert.equal(await this.token.balanceOf(account5), 12);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account3), 100);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account4), 20);
assert.equal(await this.token.getBalanceAtEventStart(eventID1, account5), 0);
// 3 - finish event
await this.token.finishEvent(eventID1);
// 4 - DO NOT increase time!!!
// let now = web3.eth.getBlock('latest').timestamp;
// await increaseTimeTo(now + duration.seconds(1));
// 5 - create event 2
const tx2 = await this.token.startNewEvent();
const events2 = tx2.logs.filter(l => l.event === 'EventStarted');
const eventID2 = events2.filter(e => e.args._address === creator)[0].args._eventID;
// 6 - CHECK BALANCES
assert.equal(await this.token.balanceOf(account3), 95);
assert.equal(await this.token.balanceOf(account4), 13);
assert.equal(await this.token.balanceOf(account5), 12);
// WARNING:
// We do not give STRONG guarantees.
// In case time has not passed - it will return 100
// in case time HAS passed between the calls - it will return 95!
//
// We do not give STRONG guarantees. The return value is time-dependent:
// If startNewEvent() is called and then immediately getBalanceAtEventStart() -> it CAN return wrong data
// In case time between these calls has passed -> the return value is ALWAYS correct.
const balance = await this.token.getBalanceAtEventStart(eventID2, account3);
const isEqual = (balance.toNumber() === 100) || (balance.toNumber() === 95);
assert.equal(isEqual, true);
});
});
describe('finishEvent', function () {
it('should not be possible to call by non-owner', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.finishEvent(eventID, { from: account3 }).should.be.rejectedWith('revert');
});
it('should throw revert() if VotingID is wrong', async () => {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(account4, 1);
const tx = await this.token.startNewEvent();
const events = tx.logs.filter(l => l.event === 'EventStarted');
const eventID = events.filter(e => e.args._address === creator)[0].args._eventID;
await this.token.transfer(account5, 1, { from: account4 });
const account4EventBalance = await this.token.getBalanceAtEventStart(eventID, account4);
const account5EventBalance = await this.token.getBalanceAtEventStart(eventID, account5);
assert.equal(account4EventBalance.toNumber(), 1);
assert.equal(account5EventBalance.toNumber(), 0);
await this.token.finishEvent(75).should.be.rejectedWith('revert');
});
});
describe('createNewSnapshot', function () {
it('should fail due to not owner call', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.createNewSnapshot(
{ from: web3.eth.accounts[1] }).should.be.rejectedWith('revert');
});
it('should succeed', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.createNewSnapshot().should.be.fulfilled;
});
});
describe('stopSnapshot', function () {
it('should fail due to not owner call', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
const tx = await this.token.createNewSnapshot();
const events = tx.logs.filter(l => l.event === 'SnapshotCreated');
const snapshotTokenAddress = events[0].args._snapshotTokenAddress;
this.snapshot = await SnapshotToken.at(snapshotTokenAddress);
await this.token.stopSnapshot(
this.snapshot.address,
{ from: web3.eth.accounts[1] }).should.be.rejectedWith('revert');
});
it('should succeed', async function () {
this.token = await PreserveBalancesOnTransferToken.new();
const tx = await this.token.createNewSnapshot();
const events = tx.logs.filter(l => l.event === 'SnapshotCreated');
const snapshotTokenAddress = events[0].args._snapshotTokenAddress;
this.snapshot = await SnapshotToken.at(snapshotTokenAddress);
await this.token.stopSnapshot(this.snapshot.address).should.be.fulfilled;
});
});
});
contract('SnapshotToken', (accounts) => {
const account3 = accounts[3];
const account4 = accounts[4];
const account5 = accounts[5];
beforeEach(async function () {
});
describe('start', function () {
it('should fail because not called from the PreserveBalancesOnTransferToken', async function () {
this.token = await PreserveBalancesMock.new();
this.snapshot = await SnapshotToken.new(this.token.address);
await this.snapshot.start(
{ from: web3.eth.accounts[1] }).should.be.rejectedWith('revert');
});
it('should fail if already started', async function () {
this.token = await PreserveBalancesMock.new();
this.snapshot = await SnapshotToken.new(this.token.address);
await this.token.testCallStartForSnapshot(this.snapshot.address).should.be.fulfilled;
await this.token.testCallStartForSnapshot(this.snapshot.address).should.be.rejectedWith('revert');
});
it('should succeed', async function () {
this.token = await PreserveBalancesMock.new();
this.snapshot = await SnapshotToken.new(this.token.address);
await this.token.testCallStartForSnapshot(this.snapshot.address).should.be.fulfilled;
});
});
describe('finish', function () {
it('should fail because not called by the owner', async function () {
this.token = await PreserveBalancesMock.new();
const tx = await this.token.createNewSnapshot();
const events = tx.logs.filter(l => l.event === 'SnapshotCreated');
const snapshotTokenAddress = events[0].args._snapshotTokenAddress;
this.snapshot = await SnapshotToken.at(snapshotTokenAddress);
await this.snapshot.finish({ from: web3.eth.accounts[1] }).should.be.rejectedWith('revert');
await this.snapshot.finish().should.be.rejectedWith('revert');
});
it('should fail if was not started', async function () {
this.token = await PreserveBalancesMock.new();
this.snapshot = await SnapshotToken.new(this.token.address);
await this.token.testCallFinishForSnapshot(this.snapshot.address).should.be.rejectedWith('revert');
});
it('should succeed', async function () {
this.token = await PreserveBalancesMock.new();
this.snapshot = await SnapshotToken.new(this.token.address);
await this.token.testCallStartForSnapshot(this.snapshot.address);
await this.token.testCallFinishForSnapshot(this.snapshot.address).should.be.fulfilled;
});
});
describe('balanceOf', function () {
it('should fail if not started', async function () {
this.token = await PreserveBalancesMock.new();
await this.token.mint(web3.eth.accounts[0], 1000);
this.snapshot = await SnapshotToken.new(this.token.address);
await this.snapshot.balanceOf(web3.eth.accounts[0]).should.be.rejectedWith('revert');
});
it('should return correct value if minted some tokens', async function () {
// not a mock contract here!
this.token = await PreserveBalancesOnTransferToken.new();
// this calls 'start' automatically
const tx = await this.token.createNewSnapshot();
const events = tx.logs.filter(l => l.event === 'SnapshotCreated');
const snapshotTokenAddress = events[0].args._snapshotTokenAddress;
this.snapshot = await SnapshotToken.at(snapshotTokenAddress);
await this.token.mint(web3.eth.accounts[0], 1000);
const balanceReal = await this.token.balanceOf(web3.eth.accounts[0]);
const balanceAtStart = await this.snapshot.balanceOf(web3.eth.accounts[0]);
assert.equal(balanceReal.toNumber(), 1000);
assert.equal(balanceAtStart.toNumber(), 0);
});
it('should return correct value if transferred some tokens', async function () {
// not a mock contract here!
this.token = await PreserveBalancesOnTransferToken.new();
await this.token.mint(web3.eth.accounts[0], 1000);
// this calls 'start' automatically
const tx = await this.token.createNewSnapshot();
const events = tx.logs.filter(l => l.event === 'SnapshotCreated');
const snapshotTokenAddress = events[0].args._snapshotTokenAddress;
this.snapshot = await SnapshotToken.at(snapshotTokenAddress);
await this.token.transfer(web3.eth.accounts[1], 200);
const balanceReal = await this.token.balanceOf(web3.eth.accounts[0]);
const balanceReal2 = await this.token.balanceOf(web3.eth.accounts[1]);
const balanceAtStart = await this.snapshot.balanceOf(web3.eth.accounts[0]);
const balanceAtStart2 = await this.snapshot.balanceOf(web3.eth.accounts[1]);
assert.equal(balanceReal.toNumber(), 800);
assert.equal(balanceReal2.toNumber(), 200);
assert.equal(balanceAtStart.toNumber(), 1000);
assert.equal(balanceAtStart2.toNumber(), 0);
});
});
describe('transfer', function () {
it('should be blocked', async function () {
this.token = await PreserveBalancesMock.new();
await this.token.mint(web3.eth.accounts[0], 1000);
this.snapshot = await SnapshotToken.new(this.token.address);
await this.snapshot.transfer(web3.eth.accounts[1], 200).should.be.rejectedWith('revert');
});
});
describe('transferFrom', function () {
it('should be blocked', async function () {
this.token = await PreserveBalancesMock.new();
await this.token.mint(account4, 1000);
this.snapshot = await SnapshotToken.new(this.token.address);
await this.snapshot.approve(account3, 1, { from: account4 });
await this.snapshot.transferFrom(account4, account5, 1, { from: account3 }).should.be.rejectedWith('revert');
});
});
});