added reference to new demo and REST api

Author: m

README.md

@@ -9,13 +9,18 @@ A highly reliable oracle aggregator for Ethereum-based DeFi apps that need finan
 
 Website: [orfeed.org](https://www.orfeed.org)
 
+## [Try out](https://www.orfeed.org/explorer) OrFeed
+
+[![Test Drive Button](https://www.orfeed.org/images/testdrive.png)](https://www.orfeed.org/explorer)
+
+
 [The Reality Stone on the Blockchain](https://medium.com/proof-of-fintech/the-reality-stone-on-the-blockchain-accessible-to-all-1654a3ec71a7) blog post
 
 [How OrFeed Was Conceived](https://medium.com/proof-of-fintech/introducing-orfeed-aa323342d34c) blog post
 
 A [Use-Case](https://medium.com/proof-of-fintech/how-a-penny-can-affect-billions-a88c0837d17e) blog post
 
-Demo: [https://etherscan.io/dapp/0x8316b082621cfedab95bf4a44a1d4b64a6ffc336](https://etherscan.io/dapp/0x8316b082621cfedab95bf4a44a1d4b64a6ffc336) (Helper: getExchangeRate is a god place to start)
+Etherscan Smart Contract Interface: [https://etherscan.io/dapp/0x8316b082621cfedab95bf4a44a1d4b64a6ffc336](https://etherscan.io/dapp/0x8316b082621cfedab95bf4a44a1d4b64a6ffc336) (Helper: getExchangeRate is a god place to start)
 
 [Youtube video tutorial](https://youtu.be/LK1BiSveEI4)
 
@@ -77,6 +82,16 @@ uint price = orfeed.getExchangeRate("AAPL", "USD", "PROVIDER1", 1);
 
 
 
+## RESTful API
+
+You can access the getExchangeRate functionality via RESTful API calls. e.g.
+```javascript
+https://api.orfeed.org/getExchangeRate?fromSymbol=JPY&toSymbol=USD&venue=DEFAULT&amount=10000000000000000
+```
+
+More of OrFeed's smart contract functionality will be added to RESTful calls soon. You can find the source code for the Node.js API app in /nodeJSAppExamples/orfeedapi
+
+
 
 ## Providing Data As An Oracle Provider
 

nodeJSAppExamples/orfeedapi/Procfile

@@ -0,0 +1 @@
+web: node index.js

nodeJSAppExamples/orfeedapi/app.json

@@ -0,0 +1,8 @@
+{
+  "name": "Start on Heroku: Node.js",
+  "description": "A barebones Node.js app using Express 4",
+  "repository": "https://github.com/heroku/node-js-getting-started",
+  "logo": "https://cdn.rawgit.com/heroku/node-js-getting-started/master/public/node.svg",
+  "keywords": ["node", "express", "heroku"],
+  "image": "heroku/nodejs"
+}

nodeJSAppExamples/orfeedapi/index.js

@@ -0,0 +1,129 @@
+
+
+
+
+console.log("Starting")
+const express = require('express')
+const path = require('path')
+var request = require('request');
+
+
+const PORT = process.env.PORT || 5000
+var bodyParser = require("body-parser");
+var cors = require('cors');
+
+
+var player = require('play-sound')(opts = {})
+
+var app = express();
+
+
+
+const http = require('http')
+
+
+Web3 = require("web3");
+
+
+web3 = new Web3('https://mainnet.infura.io/v3/ed07e65b44354a48aa1f5547369fb513');
+
+
+
+
+
+var server = http.createServer(app).listen(PORT, () => console.log(`Listening on ${ PORT }`))
+
+app.use(express.static(path.join(__dirname, 'public')))
+
+
+var cors = require('cors');
+app.use(cors({credentials: true, origin: '*'}));
+ // .set('views', path.join(__dirname, 'views'))
+  //.set('view engine', 'ejs')
+  //.get('/', (req, res) => res.render('pages/index'))
+ app.get("/", function(req, res) {
+
+
+  res.send("Welcome to the OrFeed API. Learn more at https://www.orfeed.org/docs");
+
+ })
+
+
+
+
+ app.get("/getExchangeRate", function(req, res) {
+  var answer = checkParameters(['fromSymbol', 'toSymbol', 'venue', 'amount'], req.query)
+  if(answer.status=="fail"){
+
+    res.send(answer);
+    return;
+  }
+
+  getPrices(res, req.query.fromSymbol, req.query.toSymbol, req.query.venue, parseInt(req.query.amount).toString());
+
+
+ })
+
+ app.get("/prices", function(req, res) {
+  
+
+  res.send([receivedPrices, receivedSymbols]);
+ })
+
+
+function getPrices(theRes, fromSymbol, toSymbol, venue, amount){
+
+  contractAddr = '0x8316b082621cfedab95bf4a44a1d4b64a6ffc336';
+  abi = [{"constant":false,"inputs":[{"name":"symb","type":"string"},{"name":"tokenAddress","type":"address"},{"name":"byteCode","type":"bytes32"}],"name":"addFreeCurrency","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"fromSymbol","type":"string"},{"name":"toSymbol","type":"string"},{"name":"venue","type":"string"},{"name":"amount","type":"uint256"},{"name":"referenceId","type":"string"}],"name":"requestAsyncExchangeRateResult","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"eventName","type":"string"},{"name":"source","type":"string"},{"name":"referenceId","type":"string"}],"name":"getAsyncEventResult","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newDiv","type":"uint256"},{"name":"newMul","type":"uint256"}],"name":"updateMulDivConverter2","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"synth","type":"bytes32"},{"name":"token","type":"address"},{"name":"inputAmount","type":"uint256"}],"name":"getSynthToTokenOutputAmount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"symb","type":"string"},{"name":"tokenAddress","type":"address"}],"name":"addFreeToken","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_a","type":"string"},{"name":"_b","type":"string"}],"name":"compare","outputs":[{"name":"","type":"int256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateForexOracleAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_a","type":"string"},{"name":"_b","type":"string"}],"name":"equal","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"eventName","type":"string"},{"name":"source","type":"string"}],"name":"getEventResult","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateSynthAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newDiv","type":"uint256"},{"name":"newMul","type":"uint256"}],"name":"updateMulDivConverter1","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newDiv","type":"uint256"},{"name":"newMul","type":"uint256"}],"name":"updateMulDivConverter3","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"fromSymbol","type":"string"},{"name":"toSymbol","type":"string"},{"name":"venue","type":"string"},{"name":"amount","type":"uint256"}],"name":"getExchangeRate","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"symb","type":"string"}],"name":"removeFreeToken","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateEthTokenAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"fundsReturnToAddress","type":"address"},{"name":"liquidityProviderContractAddress","type":"address"},{"name":"tokens","type":"string[]"},{"name":"amount","type":"uint256"},{"name":"exchanges","type":"string[]"}],"name":"arb","outputs":[{"name":"","type":"bool"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updatePremiumSubOracleAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_haystack","type":"string"},{"name":"_needle","type":"string"}],"name":"indexOf","outputs":[{"name":"","type":"int256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"symb","type":"string"}],"name":"removeFreeCurrency","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateAsyncOracleAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"venueToCheck","type":"string"}],"name":"isFreeVenueCheck","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"symToCheck","type":"string"}],"name":"isFree","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newAddress","type":"address"}],"name":"updateArbContractAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"changeOwner","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateAsyncEventsAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"tokenAddress","type":"address"}],"name":"getTokenDecimalCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"a","type":"string"},{"name":"b","type":"string"}],"name":"compareStrings","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"eventName","type":"string"},{"name":"source","type":"string"}],"name":"requestAsyncEvent","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"symbol","type":"string"}],"name":"getTokenAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"token","type":"address"},{"name":"synth","type":"bytes32"},{"name":"inputAmount","type":"uint256"}],"name":"getTokenToSynthOutputAmount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"source","type":"string"}],"name":"stringToBytes32","outputs":[{"name":"result","type":"bytes32"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"fromSymbol","type":"string"},{"name":"toSymbol","type":"string"},{"name":"venue","type":"string"},{"name":"amount","type":"uint256"}],"name":"requestAsyncExchangeRate","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateTokenOracleAddress2","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateSyncEventsAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"symbol","type":"string"}],"name":"getSynthBytes32","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"fromSymb","type":"string"},{"name":"toSymb","type":"string"},{"name":"amount","type":"uint256"}],"name":"getFreeExchangeRate","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOracle","type":"address"}],"name":"updateTokenOracleAddress","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newDiv","type":"uint256"},{"name":"newMul","type":"uint256"}],"name":"updateMulDivConverter4","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"symbol","type":"string"}],"name":"getForexAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"param1","type":"string"},{"name":"param2","type":"string"},{"name":"param3","type":"string"},{"name":"param4","type":"string"}],"name":"callExtraFunction","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":true,"stateMutability":"payable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"}]
+   var orContract = new web3.eth.Contract(abi, contractAddr)
+
+orContract.methods.getExchangeRate(fromSymbol, toSymbol, venue, amount.toString()).call({
+  'from': '0xC0DcE374F9aC0607B432Be0b3439c5Dc84c8f985'
+
+},function(error, data){
+  console.log("Response is:")
+  console.log(data)
+  try{
+  theRes.send({status:"success", "data":parseInt(data)})
+}
+
+catch(err){
+  theRes.send({status:"fail", "data":err})
+}
+})
+
+
+
+
+}
+
+
+function checkParameters(requiredParams, sentParams){
+
+  hasAll = true;
+
+  for (i in requiredParams){
+    var hasThis = false;
+    for(j in sentParams){
+      if(requiredParams[i] == j){
+        hasThis = true;
+      }
+    }
+
+    if(hasThis == false){
+      return {"status":"fail", "msg":"please send "+ requiredParams[i]};
+
+    }
+
+  }
+
+
+  return {"status":"success", "msg":"Has all the params"};
+
+}
+
+
+
+
+
+