Week 1 Exchange Project

README.md

@@ -0,0 +1,23 @@
+# ECDSA-Exchange
+A Simple Exchange
+
+Installing the Dependencies
+
+To install the dependencies, simply navigate to the folder you cloned the ECDSA-Exchange into and use either yarn or npm to install the dependencies listed in the package.json.
+
+Running the Server
+
+To run the server, navigate to the /server folder in a terminal window and run 'node index'. Alternatively, use 'nodemon index' to restart the server any time your server code changes.
+
+Running the Client
+
+To run the client, go to the /client folder in the repository and use parceljs on the index.html:
+
+'npx parcel index.html' and copy this url on any browser: http://localhost:1234
+
+Run a Simple Simulations
+
+In the server terminal, there will be 3 public & private address generated and each of these public address will have a separate funds to commit a transactions.
+
+Each of these transactions will require it's own private key for authentications. Each sender will need to insert their own private key in the Password field before clicking the Submit button.
+

client/index.html

@@ -18,6 +18,7 @@ <h1> Your Wallet </h1>
         <h1> Send Amount </h1>
         <input type="text" id="send-amount" placeholder="Send Amount" />
         <input type="text" id="recipient" placeholder="Recipient" />
+        <input type="password" id="private-key" placeholder="Password">
         <div class="button" id="transfer-amount">
           Transfer Amount
         </div>

client/index.js

@@ -1,3 +1,7 @@
+const EC = require("elliptic").ec;
+const SHA256 = require("crypto-js/sha256");
+const ec = new EC("secp256k1");
+
 import "./index.scss";
 
 const server = "http://localhost:3042";
@@ -9,8 +13,9 @@ document.getElementById("exchange-address").addEventListener('input', ({ target:
   }
 
   fetch(`${server}/balance/${value}`).then((response) => {
-    return response.json();
-  }).then(({ balance }) => {
+      return response.json();
+    })
+  .then(({ balance }) => {
     document.getElementById("balance").innerHTML = balance;
   });
 });
@@ -19,16 +24,35 @@ document.getElementById("transfer-amount").addEventListener('click', () => {
   const sender = document.getElementById("exchange-address").value;
   const amount = document.getElementById("send-amount").value;
   const recipient = document.getElementById("recipient").value;
+  const password = document.getElementById("private-key").value;
+
+
+
+  // set up signing with the private key
+  const key = ec.keyFromPrivate(password.toString(16));
+  const msg = "Signing Message From Sender";
+  const msgHash = SHA256(msg);
+  const signature = key.sign(msgHash.toString());
+
+  const transaction = {
+    msg,
+    signature: {
+      r: signature.r.toString(16),
+      s: signature.s.toString(16),
+    }
+  }
+
+  console.log(transaction);
 
   const body = JSON.stringify({
-    sender, amount, recipient
+    sender, amount, recipient, transaction
   });
 
   const request = new Request(`${server}/send`, { method: 'POST', body });
 
-  fetch(request, { headers: { 'Content-Type': 'application/json' }}).then(response => {
+  fetch(request, { headers: { "Content-Type": "application/json" }}).then(response => {
     return response.json();
   }).then(({ balance }) => {
     document.getElementById("balance").innerHTML = balance;
   });
-});
+});