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import { JSONRPCResponsePayload } from '@0xproject/types';
import * as chai from 'chai';
import * as _ from 'lodash';
import Web3 = require('web3');
import Web3ProviderEngine = require('web3-provider-engine');
import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
import { RedundantRPCSubprovider } from '../../src';
import { DoneCallback } from '../../src/types';
import { chaiSetup } from '../chai_setup';
import { reportCallbackErrors } from '../utils/report_callback_errors';
import { subprovider as ganacheSubprovider } from '../utils/subprovider';
const expect = chai.expect;
chaiSetup.configure();
describe('RedundantRpcSubprovider', () => {
let provider: Web3ProviderEngine;
it('succeeds when supplied a healthy endpoint', (done: DoneCallback) => {
provider = new Web3ProviderEngine();
const endpoints = ['http://localhost:8545'];
const redundantSubprovider = new RedundantRPCSubprovider(endpoints);
// Hack: Hot-swap rpc with ganacheSubprovider
(redundantSubprovider as any)._rpcs = [ganacheSubprovider];
provider.addProvider(redundantSubprovider);
provider.start();
const payload = {
jsonrpc: '2.0',
method: 'eth_accounts',
params: [],
id: 1,
};
const callback = reportCallbackErrors(done)((err: Error, response: JSONRPCResponsePayload) => {
expect(err).to.be.a('null');
expect(response.result.length).to.be.equal(10);
done();
});
provider.sendAsync(payload, callback);
});
it('succeeds when supplied at least one healthy endpoint', (done: DoneCallback) => {
provider = new Web3ProviderEngine();
const endpoints = ['http://does-not-exist:3000', 'http://localhost:8545'];
const redundantSubprovider = new RedundantRPCSubprovider(endpoints);
// Hack: Hot-swap rpcs with [nonExistentSubprovider, ganacheSubprovider]
const nonExistentSubprovider = new RpcSubprovider({
rpcUrl: 'http://does-not-exist:3000',
});
(redundantSubprovider as any)._rpcs = [nonExistentSubprovider, ganacheSubprovider];
provider.addProvider(redundantSubprovider);
provider.start();
const payload = {
jsonrpc: '2.0',
method: 'eth_accounts',
params: [],
id: 1,
};
const callback = reportCallbackErrors(done)((err: Error, response: JSONRPCResponsePayload) => {
expect(err).to.be.a('null');
expect(response.result.length).to.be.equal(10);
done();
});
provider.sendAsync(payload, callback);
});
});
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