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import { ZeroEx, ZeroExError } from '0x.js';
import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
import { BigNumber, promisify } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import * as chai from 'chai';
import { constants } from '../util/constants';
import { chaiSetup } from './utils/chai_setup';
import { deployer } from './utils/deployer';
chaiSetup.configure();
const expect = chai.expect;
const web3 = web3Factory.create();
const web3Wrapper = new Web3Wrapper(web3.currentProvider);
const blockchainLifecycle = new BlockchainLifecycle(devConstants.RPC_URL);
describe('EtherToken', () => {
let account: string;
const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9);
let zeroEx: ZeroEx;
let etherTokenAddress: string;
const sendTransactionAsync = promisify<string>(web3.eth.sendTransaction);
const getEthBalanceAsync = async (owner: string) => {
const balanceStr = await promisify<string>(web3.eth.getBalance)(owner);
const balance = new BigNumber(balanceStr);
return balance;
};
before(async () => {
const accounts = await web3Wrapper.getAvailableAddressesAsync();
account = accounts[0];
const etherToken = await deployer.deployAsync('WETH9');
etherTokenAddress = etherToken.address;
zeroEx = new ZeroEx(web3.currentProvider, {
gasPrice,
networkId: constants.TESTRPC_NETWORK_ID,
});
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('deposit', () => {
it('should throw if caller attempts to deposit more Ether than caller balance', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const ethToDeposit = initEthBalance.plus(1);
return expect(zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account)).to.be.rejectedWith(
ZeroExError.InsufficientEthBalanceForDeposit,
);
});
it('should convert deposited Ether to wrapped Ether tokens', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
const txHash = await zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account);
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
});
});
describe('withdraw', () => {
it('should throw if caller attempts to withdraw greater than caller balance', async () => {
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethTokensToWithdraw = initEthTokenBalance.plus(1);
return expect(
zeroEx.etherToken.withdrawAsync(etherTokenAddress, ethTokensToWithdraw, account),
).to.be.rejectedWith(ZeroExError.InsufficientWEthBalanceForWithdrawal);
});
it('should convert ether tokens to ether with sufficient balance', async () => {
const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
await zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account);
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const initEthBalance = await getEthBalanceAsync(account);
const ethTokensToWithdraw = initEthTokenBalance;
expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
const txHash = await zeroEx.etherToken.withdrawAsync(etherTokenAddress, ethTokensToWithdraw, account, {
gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS,
});
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber.equal(
initEthBalance.plus(ethTokensToWithdraw.minus(ethSpentOnGas)),
);
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.minus(ethTokensToWithdraw));
});
});
describe('fallback', () => {
it('should convert sent ether to ether tokens', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = ZeroEx.toBaseUnitAmount(new BigNumber(1), 18);
const txHash = await sendTransactionAsync({
from: account,
to: etherTokenAddress,
value: ethToDeposit,
gasPrice,
});
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
});
});
});
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