af78238507
* Bancor Bridge contract * refactor Quote and FillData types * BancorService (wrapper for the Bancor SDK) * disable bancor while waiting for bancor SDK update * add bancor to test
62 lines
2.7 KiB
TypeScript
62 lines
2.7 KiB
TypeScript
import { web3Factory, Web3ProviderEngine } from '@0x/dev-utils';
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import * as chai from 'chai';
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import * as _ from 'lodash';
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import 'mocha';
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import { BancorFillData, BigNumber } from '../src';
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import { BancorService, token } from '../src/utils/market_operation_utils/bancor_service';
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import { chaiSetup } from './utils/chai_setup';
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chaiSetup.configure();
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const expect = chai.expect;
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const ADDRESS_REGEX = /^(0x)?[0-9a-f]{40}$/i;
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const RPC_URL = `https://mainnet.infura.io/v3/${process.env.INFURA_PROJECT_ID}`;
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const provider: Web3ProviderEngine = web3Factory.getRpcProvider({ rpcUrl: RPC_URL });
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// tslint:disable:custom-no-magic-numbers
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// These tests test the bancor SDK against mainnet
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// TODO (xianny): After we move asset-swapper out of the monorepo, we should add an env variable to circle CI to run this test
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describe.skip('Bancor Service', () => {
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const bancorService = new BancorService(provider);
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const eth = '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee';
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const bnt = '0x1f573d6fb3f13d689ff844b4ce37794d79a7ff1c';
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it('should retrieve the bancor network address', async () => {
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const networkAddress = await bancorService.getBancorNetworkAddressAsync();
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expect(networkAddress).to.match(ADDRESS_REGEX);
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});
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it('should retrieve a quote', async () => {
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const amt = new BigNumber(2);
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const quote = await bancorService.getQuoteAsync(eth, bnt, amt);
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const fillData = quote.fillData as BancorFillData;
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// get rate from the bancor sdk
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const sdk = await bancorService.getSDKAsync();
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const expectedAmt = await sdk.pricing.getRateByPath(fillData.path.map(s => token(s)), amt.toString());
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expect(fillData.networkAddress).to.match(ADDRESS_REGEX);
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expect(fillData.path).to.be.an.instanceOf(Array);
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expect(fillData.path).to.have.lengthOf(3);
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expect(quote.amount.dp(0)).to.bignumber.eq(
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new BigNumber(expectedAmt).multipliedBy(bancorService.minReturnAmountBufferPercentage).dp(0),
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);
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});
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// HACK (xianny): for exploring SDK results
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it('should retrieve multiple quotes', async () => {
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const amts = [1, 10, 100, 1000].map(a => new BigNumber(a).multipliedBy(10e18));
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const quotes = await Promise.all(amts.map(async amount => bancorService.getQuoteAsync(eth, bnt, amount)));
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quotes.map((q, i) => {
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// tslint:disable:no-console
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const fillData = q.fillData as BancorFillData;
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console.log(
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`Input ${amts[i].toExponential()}; Output: ${q.amount}; Path: ${
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fillData.path.length
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}\nPath: ${JSON.stringify(fillData.path)}`,
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);
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// tslint:enable:no-console
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});
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});
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});
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