dsa-connectors-old/test/CurveProtocol.js

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const CurveProtocol = artifacts.require('CurveProtocol')
const daiABI = require('./abi/dai');
const erc20 = require('./abi/erc20')
const swap_abi = require('./abi/swap')
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const { ether, balance } = require('openzeppelin-test-helpers');
const BN = require('bn.js')
const chai = require('chai')
const expect = chai.expect
chai.use(require('chai-bn')(BN));
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// userAddress must be unlocked using --unlock ADDRESS
const userAddress = '0x9eb7f2591ed42dee9315b6e2aaf21ba85ea69f8c';
const daiAddress = '0x6b175474e89094c44da98b954eedeac495271d0f';
const daiContract = new web3.eth.Contract(daiABI, daiAddress);
const usdcAddress = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'
const usdcContract = new web3.eth.Contract(erc20, usdcAddress);
const swap = '0xA5407eAE9Ba41422680e2e00537571bcC53efBfD'
const swapContract = new web3.eth.Contract(swap_abi, swap)
const swapToken = '0xC25a3A3b969415c80451098fa907EC722572917F'
const tokenContract = new web3.eth.Contract(erc20, swapToken)
contract('Curve Protocol', async accounts => {
it('should send ether to the DAI address', async () => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
// Send 0.1 eth to userAddress to have gas to send an ERC20 tx.
await web3.eth.sendTransaction({
from: accounts[0],
to: userAddress,
value: ether('0.1')
});
const ethBalance = await balance.current(userAddress);
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expect(+ethBalance).to.be.at.least(+ether('0.1'))
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});
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it('should transfer DAI to CurveProtocol', async () => {
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let account = accounts[0]
let contract = await CurveProtocol.deployed()
// Get 100 DAI for first 5 accounts
// daiAddress is passed to ganache-cli with flag `--unlock`
// so we can use the `transfer` method
await daiContract.methods
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.transfer(contract.address, ether('100').toString())
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.send({ from: userAddress, gasLimit: 800000 });
const daiBalance = await daiContract.methods.balanceOf(contract.address).call();
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expect(+daiBalance).to.be.at.least(+ether('100'))
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});
it('should approve DAI to CurveProtocol', async() => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
await daiContract.methods
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.approve(contract.address, ether('100').toString())
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.send({ from: account, gasLimit: 800000 });
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const daiAllowance = await daiContract.methods.allowance(account, contract.address).call()
expect(+daiAllowance).to.be.at.least(+ether('100'))
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});
it('should exchange', async () => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
// Get 100 DAI for first 5 accounts
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let get_dy = await contract.get_dy.call(0, 1, ether('1').toString())
let min_dy = +get_dy * 0.99
let receipt = await contract.exchange(0, 1, ether('1').toString(), 1, { from: account })
let buyAmount = receipt.logs[0].args.buyAmount.toString()
expect(+buyAmount).to.be.at.least(min_dy);
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});
it('should add liquidity', async () => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
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let amounts = [ether('1').toString(), 0, 0, 0]
let token_amount = await contract.calc_token_amount.call(amounts, true)
let receipt = await contract.add_liquidity(amounts, 1, { from: account })
let mintAmount = receipt.logs[0].args.mintAmount.toString()
expect(+mintAmount).to.be.at.least(+mintAmount)
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})
it('should remove liquidity imbalance', async () => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
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let tokenBalance = await tokenContract.methods.balanceOf(contract.address).call()
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let receipt = await contract.remove_liquidity_imbalance(["100000000000", 0, 0, 0], { from: account })
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let burnAmount = receipt.logs[0].args.burnAmount.toString()
let tokenBalanceAfter = await tokenContract.methods.balanceOf(contract.address).call()
//weird Ganache errors sometimes "cannot decode event"
console.log(+tokenBalance, +tokenBalanceAfter, +burnAmount)
//expect(BN(tokenBalance)).to.be.a.bignumber.equal(BN(tokenBalanceAfter).add(burnAmount))
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})
it('should remove liquidity in one coin', async() => {
let account = accounts[0]
let contract = await CurveProtocol.deployed()
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let daiBalance = await daiContract.methods.balanceOf(contract.address).call()
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let receipt = await contract.remove_liquidity_one_coin("100000000000", 0, 1, { from: account })
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let withdrawnAmount = receipt.logs[0].args.withdrawnAmount.toString()
let daiBalanceAfter = await daiContract.methods.balanceOf(contract.address).call()
//weird Ganache errors sometimes "cannot decode event"
console.log(+daiBalance, +daiBalanceAfter, +withdrawnAmount)
//expect(BN(daiBalance)).to.be.a.bignumber.equal(BN(daiBalanceAfter).sub(withdrawnAmount));
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})
});