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import { ZeroEx, ZeroExError } from '0x.js';
import { BigNumber, promisify } from '@0xproject/utils';
import * as chai from 'chai';
import Web3 = require('web3');
import { Artifacts } from '../util/artifacts';
import { constants } from '../util/constants';
import { chaiSetup } from './utils/chai_setup';
const { EtherToken } = new Artifacts(artifacts);
chaiSetup.configure();
const expect = chai.expect;
// In order to benefit from type-safety, we re-assign the global web3 instance injected by Truffle
// with type `any` to a variable of type `Web3`.
const web3: Web3 = (global as any).web3;
contract('EtherToken', (accounts: string[]) => {
const account = accounts[0];
const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9);
let zeroEx: ZeroEx;
let etherTokenAddress: string;
before(async () => {
etherTokenAddress = EtherToken.address;
zeroEx = new ZeroEx(web3.currentProvider, {
gasPrice,
networkId: constants.TESTRPC_NETWORK_ID,
});
});
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;
};
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 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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