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Merge pull request #63 from embarklabs/feat/graphql-example 

feat: graphql example with react
This commit is contained in:
Iuri Matias 2020-01-23 09:09:59 -05:00 committed by GitHub
parent f821569301 ddedf64af9
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54
examples/react-graphql-example1/README.md Normal file
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subspace - react graphql example
===
Simple application using graphql queries to receive a stream of events
This app will deploy a test contract to **Ganache**.
## Requirements
- `ganache-cli`
- `yarn` or `npm` installed.
## Install
In the parent folder, install, build and link the package with `yarn` or `npm`
```
yarn
yarn build:dev
yarn link
```
Then in the current folder link `@embarklabs/subspace`, and install the packages
```
yarn link "@embarklabs/subspace"
yarn
```
## Usage
In a terminal execute
```
ganache-cli
```
In a different session, execute
```
yarn run deploy
```
And then:
```
yarn run start
```
Browse the DApp in [http://localhost:3000](http://localhost:3000)
*Note*: this is a simple example application that does not include error handling for the web3 connection. Be sure `ganache-cli` is running in `localhost:8545` before browsing the dapp.
### node-gyp problems
node-gyp can cause problems, because it requires a C++ compiler.
If you do have problems caused by it, first follow the installation steps for your OS [here](https://github.com/nodejs/node-gyp#installation).
If you still have problems and are on Windows, try the following:
- run `npm config set msvs_version 2015` before `npm install`
- Repair Windows Build tools that the node-gyp doc made you install. If it tells you to remove a conflicting version do it. After the repair succeeded, reboot.

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examples/react-graphql-example1/deploy.js vendored Normal file
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const Web3 = require("web3");
const web3 = new Web3("ws://localhost:8545");
const fs = require("fs-extra");
const abi = [
{
"constant": false,
"inputs": [
{
"internalType": "string",
"name": "title",
"type": "string"
}
],
"name": "createProduct",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"internalType": "uint256",
"name": "productId",
"type": "uint256"
},
{
"internalType": "string",
"name": "title",
"type": "string"
}
],
"name": "editProduct",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"name": "products",
"outputs": [
{
"internalType": "string",
"name": "title",
"type": "string"
},
{
"internalType": "uint256",
"name": "latestRating",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"internalType": "uint256",
"name": "productId",
"type": "uint256"
},
{
"internalType": "uint256",
"name": "rating",
"type": "uint256"
}
],
"name": "rateProduct",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "constructor"
},
{
"payable": true,
"stateMutability": "payable",
"type": "fallback"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "uint256",
"name": "productId",
"type": "uint256"
}
],
"name": "newProduct",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "uint256",
"name": "productId",
"type": "uint256"
},
{
"indexed": false,
"internalType": "uint256",
"name": "rating",
"type": "uint256"
}
],
"name": "Rating",
"type": "event"
}
];
const data = "0x608060405234801561001057600080fd5b506100556040518060400160405280600681526020017f6c6170746f70000000000000000000000000000000000000000000000000000081525061005a60201b60201c565b610244565b600080805480919060010161006f91906100ee565b9050600080828154811061007f57fe5b90600052602060002090600202019050828160000190805190602001906100a7929190610120565b50600281600101819055507f5dc23a654c93455cd36741580d5c1fafc8f35c429bb831bc768008bd655a1219826040518082815260200191505060405180910390a1505050565b81548183558181111561011b5760020281600202836000526020600020918201910161011a91906101a0565b5b505050565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f1061016157805160ff191683800117855561018f565b8280016001018555821561018f579182015b8281111561018e578251825591602001919060010190610173565b5b50905061019c91906101d7565b5090565b6101d491905b808211156101d057600080820160006101bf91906101fc565b6001820160009055506002016101a6565b5090565b90565b6101f991905b808211156101f55760008160009055506001016101dd565b5090565b90565b50805460018160011615610100020316600290046000825580601f106102225750610241565b601f01602090049060005260206000209081019061024091906101d7565b5b50565b610659806102536000396000f3fe60806040526004361061003f5760003560e01c806302ec06be1461004157806311eaa75a146101095780637acc0b20146101db578063f4ef9e3614610296575b005b34801561004d57600080fd5b506101076004803603602081101561006457600080fd5b810190808035906020019064010000000081111561008157600080fd5b82018360208201111561009357600080fd5b803590602001918460018302840111640100000000831117156100b557600080fd5b91908080601f016020809104026020016040519081016040528093929190818152602001838380828437600081840152601f19601f8201169050808301925050505050505091929192905050506102db565b005b34801561011557600080fd5b506101d96004803603604081101561012c57600080fd5b81019080803590602001909291908035906020019064010000000081111561015357600080fd5b82018360208201111561016557600080fd5b8035906020019184600183028401116401000000008311171561018757600080fd5b91908080601f016020809104026020016040519081016040528093929190818152602001838380828437600081840152601f19601f82011690508083019250505050505050919291929050505061036f565b005b3480156101e757600080fd5b50610214600480360360208110156101fe57600080fd5b81019080803590602001909291905050506103a6565b6040518080602001838152602001828103825284818151815260200191508051906020019080838360005b8381101561025a57808201518184015260208101905061023f565b50505050905090810190601f1680156102875780820380516001836020036101000a031916815260200191505b50935050505060405180910390f35b3480156102a257600080fd5b506102d9600480360360408110156102b957600080fd5b81019080803590602001909291908035906020019092919050505061046f565b005b60008080548091906001016102f091906104ce565b9050600080828154811061030057fe5b9060005260206000209060020201905082816000019080519060200190610328929190610500565b50600281600101819055507f5dc23a654c93455cd36741580d5c1fafc8f35c429bb831bc768008bd655a1219826040518082815260200191505060405180910390a1505050565b806000838154811061037d57fe5b906000526020600020906002020160000190805190602001906103a1929190610500565b505050565b600081815481106103b357fe5b9060005260206000209060020201600091509050806000018054600181600116156101000203166002900480601f01602080910402602001604051908101604052809291908181526020018280546001816001161561010002031660029004801561045f5780601f106104345761010080835404028352916020019161045f565b820191906000526020600020905b81548152906001019060200180831161044257829003601f168201915b5050505050908060010154905082565b817ffdefdf8d82459f7b1eb157e5c44cbe6ee73d8ddd387511fe3622a3ee663b4697826040518082815260200191505060405180910390a280600083815481106104b557fe5b9060005260206000209060020201600101819055505050565b8154818355818111156104fb576002028160020283600052602060002091820191016104fa9190610580565b5b505050565b828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f1061054157805160ff191683800117855561056f565b8280016001018555821561056f579182015b8281111561056e578251825591602001919060010190610553565b5b50905061057c91906105b7565b5090565b6105b491905b808211156105b0576000808201600061059f91906105dc565b600182016000905550600201610586565b5090565b90565b6105d991905b808211156105d55760008160009055506001016105bd565b5090565b90565b50805460018160011615610100020316600290046000825580601f106106025750610621565b601f01602090049060005260206000209081019061062091906105b7565b5b5056fea265627a7a72315820283a23649d3076ca075a3d9190d7b69b6665e8b1d83e5240c8cfbe34dc9d9b3364736f6c634300050b0032";
const MyContract = new web3.eth.Contract(abi, {data, gas: "800000"});
(async () => {
if (!web3.eth.defaultAccount) {
const accounts = await web3.eth.getAccounts();
web3.eth.defaultAccount = accounts[0];
}
const instance = await MyContract.deploy().send({ from: web3.eth.defaultAccount });
let address = instance.options.address;
console.dir("deployment done!");
fs.writeJsonSync("./src/contract.json", { address, abi });
console.dir("artifact written to src/contract.json")
process.exit(0)
})()

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{
"name": "observables",
"version": "0.1.0",
"private": true,
"dependencies": {
"fs-extra": "^8.1.0",
"graphql-tag": "^2.10.1",
"graphql-tools": "^4.0.6",
"react": "^16.9.0",
"react-dom": "^16.9.0",
"react-scripts": "3.1.1",
"reactive-graphql": "^4.0.1",
"rxjs": "^6.5.2",
"web3": "^1.2.1"
},
"scripts": {
"start": "react-scripts start",
"deploy": "node deploy.js",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>React App</title>
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
<!--
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
You can add webfonts, meta tags, or analytics to this file.
The build step will place the bundled scripts into the <body> tag.
To begin the development, run `npm start` or `yarn start`.
To create a production bundle, use `npm run build` or `yarn build`.
-->
</body>
</html>

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import React from "react";
import Subspace from "@status-im/subspace";
import { $average, $latest } from "@embarklabs/subspace";
import { makeExecutableSchema } from "graphql-tools";
import { graphql } from "reactive-graphql";
import { map, scan } from "rxjs/operators";
import web3 from "./web3";
import { abi, address } from "./contract.json";
let Product;
class App extends React.Component {
state = {
userRating: 0,
averageRating: 0,
last5Ratings: [],
filteredRatings: []
};
async componentDidMount() {
const subspace = new Subspace(web3.currentProvider);
await subspace.init();
Product = subspace.contract({ abi, address });
const typeDefs = `
type Query {
averageRating: Float!
last5Ratings: [Int!]
filteredRatings(gte: Int): [Int!]
}
`;
const rating$ = Product.events.Rating.track()
.map("rating")
.pipe(map(x => parseInt(x)));
const resolvers = {
Query: {
averageRating: () => rating$.pipe($average()),
last5Ratings: () => rating$.pipe($latest(5)),
filteredRatings: (a, conditions) => {
const gte = (conditions && conditions.gte) || 0;
return rating$.pipe(
scan((accum, val) => {
if (val >= gte) {
return [...accum, val];
} else {
return accum;
}
}, [])
);
}
}
};
const schema = makeExecutableSchema({ typeDefs, resolvers });
const summaryQuery = `
query {
averageRating
last5Ratings
}
`;
graphql(schema, summaryQuery).subscribe(
({ data: { averageRating, last5Ratings } }) => {
this.setState({ averageRating, last5Ratings });
}
);
const filterRatingsQuery = `
query {
filteredRatings(gte: 3)
}
`;
graphql(schema, filterRatingsQuery).subscribe(
({ data: { filteredRatings } }) => {
this.setState({ filteredRatings });
}
);
}
rateProduct = async () => {
let accounts = await web3.eth.getAccounts();
await Product.methods
.rateProduct(0, this.state.userRating)
.send({ from: accounts[0] });
};
render() {
return (
<div>
<button onClick={this.rateProduct}>Rate Product</button>
<input
type="number"
value={this.state.userRating}
onChange={evt =>
this.setState({ userRating: parseInt(evt.target.value) })
}
/>
<ul>
<li><b>average rating: </b> {this.state.averageRating}</li>
<li><b>last 5 ratings: </b> {(this.state.last5Ratings || []).join(', ')}</li>
<li><b>all ratings greater than 2:</b> {(this.state.filteredRatings || []).join(', ')}</li>
</ul>
</div>
);
}
}
export default App;

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import web3 from './web3';
import {abi, address} from './contract.json'
const MyContract = new web3.eth.Contract(abi, {from: web3.eth.default, gas: "800000"});
MyContract.options.address = address;
MyContract.getInstance = async () => {
if (!web3.eth.defaultAccount) {
const accounts = await web3.eth.getAccounts();
web3.eth.defaultAccount = accounts[0];
}
MyContract.options.from = web3.eth.defaultAccount;
return MyContract;
}
export default MyContract;

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import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import * as serviceWorker from './serviceWorker';
ReactDOM.render(<App />, document.getElementById('root'));
// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
serviceWorker.unregister();

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// This optional code is used to register a service worker.
// register() is not called by default.
// This lets the app load faster on subsequent visits in production, and gives
// it offline capabilities. However, it also means that developers (and users)
// will only see deployed updates on subsequent visits to a page, after all the
// existing tabs open on the page have been closed, since previously cached
// resources are updated in the background.
// To learn more about the benefits of this model and instructions on how to
// opt-in, read https://bit.ly/CRA-PWA
const isLocalhost = Boolean(
window.location.hostname === 'localhost' ||
// [::1] is the IPv6 localhost address.
window.location.hostname === '[::1]' ||
// 127.0.0.1/8 is considered localhost for IPv4.
window.location.hostname.match(
/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
)
);
export function register(config) {
if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
// The URL constructor is available in all browsers that support SW.
const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
if (publicUrl.origin !== window.location.origin) {
// Our service worker won't work if PUBLIC_URL is on a different origin
// from what our page is served on. This might happen if a CDN is used to
// serve assets; see https://github.com/facebook/create-react-app/issues/2374
return;
}
window.addEventListener('load', () => {
const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
if (isLocalhost) {
// This is running on localhost. Let's check if a service worker still exists or not.
checkValidServiceWorker(swUrl, config);
// Add some additional logging to localhost, pointing developers to the
// service worker/PWA documentation.
navigator.serviceWorker.ready.then(() => {
console.log(
'This web app is being served cache-first by a service ' +
'worker. To learn more, visit https://bit.ly/CRA-PWA'
);
});
} else {
// Is not localhost. Just register service worker
registerValidSW(swUrl, config);
}
});
}
}
function registerValidSW(swUrl, config) {
navigator.serviceWorker
.register(swUrl)
.then(registration => {
registration.onupdatefound = () => {
const installingWorker = registration.installing;
if (installingWorker == null) {
return;
}
installingWorker.onstatechange = () => {
if (installingWorker.state === 'installed') {
if (navigator.serviceWorker.controller) {
// At this point, the updated precached content has been fetched,
// but the previous service worker will still serve the older
// content until all client tabs are closed.
console.log(
'New content is available and will be used when all ' +
'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
);
// Execute callback
if (config && config.onUpdate) {
config.onUpdate(registration);
}
} else {
// At this point, everything has been precached.
// It's the perfect time to display a
// "Content is cached for offline use." message.
console.log('Content is cached for offline use.');
// Execute callback
if (config && config.onSuccess) {
config.onSuccess(registration);
}
}
}
};
};
})
.catch(error => {
console.error('Error during service worker registration:', error);
});
}
function checkValidServiceWorker(swUrl, config) {
// Check if the service worker can be found. If it can't reload the page.
fetch(swUrl)
.then(response => {
// Ensure service worker exists, and that we really are getting a JS file.
const contentType = response.headers.get('content-type');
if (
response.status === 404 ||
(contentType != null && contentType.indexOf('javascript') === -1)
) {
// No service worker found. Probably a different app. Reload the page.
navigator.serviceWorker.ready.then(registration => {
registration.unregister().then(() => {
window.location.reload();
});
});
} else {
// Service worker found. Proceed as normal.
registerValidSW(swUrl, config);
}
})
.catch(() => {
console.log(
'No internet connection found. App is running in offline mode.'
);
});
}
export function unregister() {
if ('serviceWorker' in navigator) {
navigator.serviceWorker.ready.then(registration => {
registration.unregister();
});
}
}

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import Web3 from 'web3';
const web3 = new Web3("ws://localhost:8545");
export default web3;

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3
src/subspace.js
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@ -81,7 +81,7 @@ export default class Subspace {
if (!from) {
setTimeout(async () => {
const accounts = await web3.eth.getAccounts();
const accounts = await this.web3.getAccounts();
SubspaceContract.options.from = accounts[0];
}, 100);
}
@ -91,6 +91,7 @@ export default class Subspace {
}
Object.keys(SubspaceContract.events).forEach(ev => {
if(!SubspaceContract.options.jsonInterface.find(x => x.type === 'event' && x.name == ev)) return;
SubspaceContract.events[ev].track = (filterConditionsOrCb) => this.trackEvent(SubspaceContract, ev, filterConditionsOrCb);
});