dapp_provider_engine_20181115.js

// Workable on Mainnet:
// https://kyber.network/swap/eth_knc
// https://dapp.originprotocol.com

var Web3 = require('web3');

const ProviderEngine = require('web3-provider-engine')
const RpcSubprovider = require('web3-provider-engine/subproviders/rpc.js')
const Web3Subprovider = require("./web3_subprovider.js");
const DappSubprovider = require("./dapp_subprovider_new.js");
const SubscriptionSubprovider = require('web3-provider-engine/subproviders/subscriptions')
const FixtureSubprovider = require('web3-provider-engine/subproviders/fixture.js')
// const VmSubprovider = require('web3-provider-engine/subproviders/vm.js')

// solving postMessage funciton
function awaitPostMessage() {
    let isReactNativePostMessageReady = !!window.originalPostMessage;
    const queue = [];
    let currentPostMessageFn = function store(message) {
        if (queue.length > 100) queue.shift();
        queue.push(message);
    };
    if (!isReactNativePostMessageReady) {
        // const originalPostMessage = window.postMessage;
        Object.defineProperty(window, 'postMessage', {
            configurable: true,
            enumerable: true,
            get() {
                return currentPostMessageFn;
            },
            set(fn) {
                currentPostMessageFn = fn;
                isReactNativePostMessageReady = true;
                setTimeout(sendQueue, 0);
            },
        });
    }

    function sendQueue() {
        while (queue.length > 0) window.postMessage(queue.shift());
    }
}

awaitPostMessage();

function logger(msg) {
    window.postMessage(JSON.stringify({ action: 'log', msg }));
}

var engine = new ProviderEngine();

var web3 = new Web3(engine);

// engine.addProvider(new FixtureSubprovider({
//   connected: true,
//   // net_listening: true,
//   // eth_hashrate: '0x00',
//   // eth_mining: false,
//   // eth_syncing: true,
// }))

engine.addProvider(new DappSubprovider());

// filters
engine.addProvider(new SubscriptionSubprovider())

// data source
engine.addProvider(new RpcSubprovider({
    //rpcUrl: 'http://127.0.0.1:8545',
    // rpcUrl: 'https://ropsten.infura.io/v3/056c00b3a8d846369185946435ca1ea3',
    rpcUrl: 'https://mainnet.infura.io/v3/056c00b3a8d846369185946435ca1ea3',
}))
// web3, 這可能有問題
// engine.addProvider(
//     new Web3Subprovider(
//         new Web3.providers.WebsocketProvider("wss://mainnet.infura.io/ws")
//     )
// );

// This is needed to work on https://dapp.originprotocol.com
engine.connected = true;

engine.isConnected = () => {
    return true;
}

// start polling for blocks
engine.start();

//web3.currentProvider.isMetaMask = true;

// web3.version = {
//     getNetwork: (...args) => {
//         return web3.eth.net.getId(...args);
//     }
// }

web3.version = {
    api: "1.0.0-beta.34",
    network: "1",
    getNetwork: (...args) => {
        return web3.eth.net.getId(...args);
    },
}

// 這樣用會壞掉
// engine.eth.coinbase = "0x685ce4CbDd5c19b64CA008cB85b83947e5318EFA";

// web3.currentProvider = engine;

// web3.isConnected = function(){ return web3.currentProvider.isConnected() };

web3.eth.coinbase = "0x685ce4CbDd5c19b64CA008cB85b83947e5318EFA"; // 不設的話是 undefined

// 在這邊設不能用
web3.givenProvider = engine; // 不設的話是 null

// engine.net.isListening = true;

// --- Static data ---
// var data = {
//     version: web3.version,
//     coinbase: web3.eth.coinbase,
//     defaultAccount: web3.eth.defaultAccount,
//     accounts: web3.eth.accounts,
//     currentProvider: web3.currentProvider,
//     givenProvider: web3.givenProvider,
// }
// window.postMessage(JSON.stringify({ action: 'log', msg: web3.version }));

// window.postMessage(JSON.stringify({ action: 'log', msg: web3.eth.coinbase }));

// window.postMessage(JSON.stringify({ action: 'log', msg: web3.givenProvider.toString() }));

// window.postMessage(JSON.stringify({ action: 'log', msg: web3.currentProvider.toString() }));

// This work
window.web3 = web3;

// Make sure this line is showed, and then web3 is loaded successfully
window.postMessage(JSON.stringify({ action: 'log', msg: 'load web3 done.' }));