From 4a108206fce1d5f11f27eda5b4298c6de0432103 Mon Sep 17 00:00:00 2001
From: Michael <michael.spengler@sap.com>
Date: Wed, 6 Jan 2021 10:57:47 +0100
Subject: [PATCH 1/2] add environment variables

---
 .env.example      | 3 +++
 .gitignore        | 1 +
 package-lock.json | 5 +++++
 package.json      | 1 +
 server.js         | 8 +++++---
 5 files changed, 15 insertions(+), 3 deletions(-)
 create mode 100644 .env.example

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..55a5b26
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,3 @@
+walletAddress=
+walletPrivateKey=
+infuraProjectId=
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 646ac51..8e36a30 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .DS_Store
 node_modules/
+.env
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index cb02dd1..e330863 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -640,6 +640,11 @@
       "resolved": "https://registry.npmjs.org/dom-walk/-/dom-walk-0.1.1.tgz",
       "integrity": "sha1-ZyIm3HTI95mtNTB9+TaroRrNYBg="
     },
+    "dotenv": {
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-8.2.0.tgz",
+      "integrity": "sha512-8sJ78ElpbDJBHNeBzUbUVLsqKdccaa/BXF1uPTw3GrvQTBgrQrtObr2mUrE38vzYd8cEv+m/JBfDLioYcfXoaw=="
+    },
     "drbg.js": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/drbg.js/-/drbg.js-1.0.1.tgz",
diff --git a/package.json b/package.json
index 5c937f9..f870603 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
+    "dotenv": "^8.2.0",
     "express": "^4.17.1",
     "web3": "^1.2.6"
   }
diff --git a/server.js b/server.js
index 1ba7b6a..968f751 100644
--- a/server.js
+++ b/server.js
@@ -1,13 +1,15 @@
+require("dotenv").config(); // this ensures process.env. ... contains your .env file configuration values
+
 const express = require('express');
 const bodyParser = require('body-parser');
 const Web3 = require('web3');
 const config = require('./config.json');
 
-const walletPrivateKey = process.env.walletPrivateKey;
-const web3 = new Web3('https://mainnet.infura.io/v3/_your_api_key_here_');
+const walletPrivateKey = process.env.walletPrivateKey; // make sure this is provided in your .env file
+const web3 = new Web3(`https://mainnet.infura.io/v3/${process.env.infuraProjectId}`);
 
 web3.eth.accounts.wallet.add(walletPrivateKey);
-const myWalletAddress = web3.eth.accounts.wallet[0].address;
+const myWalletAddress = process.env.walletAddress
 
 const cEthAddress = config.cEthAddress;
 const cEthAbi = config.cEthAbi;

From 6a411afb17aae3ba3f0fb94ef4c452838569caa4 Mon Sep 17 00:00:00 2001
From: Michael <michael.spengler@sap.com>
Date: Wed, 6 Jan 2021 10:59:22 +0100
Subject: [PATCH 2/2] fix lint warnings

---
 .env.example | 2 +-
 .gitignore   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.env.example b/.env.example
index 55a5b26..93c5c92 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,3 @@
 walletAddress=
 walletPrivateKey=
-infuraProjectId=
\ No newline at end of file
+infuraProjectId=
diff --git a/.gitignore b/.gitignore
index 8e36a30..047173c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 .DS_Store
 node_modules/
-.env
\ No newline at end of file
+.env