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import { ContractWrappers, ContractWrappersError } from '@0xproject/contract-wrappers';
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 'make-promises-safe';
import { WETH9Contract } from '../src/contract_wrappers/generated/weth9';
import { artifacts } from '../src/utils/artifacts';
import { chaiSetup } from '../src/utils/chai_setup';
import { constants } from '../src/utils/constants';
import { provider, txDefaults, web3Wrapper } from '../src/utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('EtherToken', () => {
let account: string;
const gasPrice = Web3Wrapper.toBaseUnitAmount(new BigNumber(20), 9);
let contractWrappers: ContractWrappers;
let etherTokenAddress: string;
before(async () => {
await blockchainLifecycle.startAsync();
});
after(async () => {
await blockchainLifecycle.revertAsync();
});
before(async () => {
const accounts = await web3Wrapper.getAvailableAddressesAsync();
account = accounts[0];
const etherToken = await WETH9Contract.deployFrom0xArtifactAsync(artifacts.EtherToken, provider, txDefaults);
etherTokenAddress = etherToken.address;
contractWrappers = new ContractWrappers(provider, {
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 web3Wrapper.getBalanceInWeiAsync(account);
const ethToDeposit = initEthBalance.plus(1);
return expect(
contractWrappers.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account),
).to.be.rejectedWith(ContractWrappersError.InsufficientEthBalanceForDeposit);
});
it('should convert deposited Ether to wrapped Ether tokens', async () => {
const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account);
const initEthTokenBalance = await contractWrappers.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1)));
const txHash = await contractWrappers.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account);
const receipt = await web3Wrapper.awaitTransactionMinedAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account);
const finalEthTokenBalance = await contractWrappers.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 contractWrappers.token.getBalanceAsync(etherTokenAddress, account);
const ethTokensToWithdraw = initEthTokenBalance.plus(1);
return expect(
contractWrappers.etherToken.withdrawAsync(etherTokenAddress, ethTokensToWithdraw, account),
).to.be.rejectedWith(ContractWrappersError.InsufficientWEthBalanceForWithdrawal);
});
it('should convert ether tokens to ether with sufficient balance', async () => {
const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1)));
await contractWrappers.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account);
const initEthTokenBalance = await contractWrappers.token.getBalanceAsync(etherTokenAddress, account);
const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account);
const ethTokensToWithdraw = initEthTokenBalance;
expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
const txHash = await contractWrappers.etherToken.withdrawAsync(
etherTokenAddress,
ethTokensToWithdraw,
account,
{
gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS,
},
);
const receipt = await web3Wrapper.awaitTransactionMinedAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account);
const finalEthTokenBalance = await contractWrappers.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 web3Wrapper.getBalanceInWeiAsync(account);
const initEthTokenBalance = await contractWrappers.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 18);
const txHash = await web3Wrapper.sendTransactionAsync({
from: account,
to: etherTokenAddress,
value: ethToDeposit,
gasPrice,
});
const receipt = await web3Wrapper.awaitTransactionMinedAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account);
const finalEthTokenBalance = await contractWrappers.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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