Merge remote-tracking branch 'origin/main'

# Conflicts:
#	src/schema.rs

35 files changed, 1697 insertions, 0 deletions

diff --git a/site/config.toml b/site/config.toml
new file mode 100644
index 0000000..070b762
--- /dev/null
+++ b/site/config.toml
@@ -0,0 +1,28 @@
+# The URL the site will be built for
+base_url = "https://gradecoin.xyz"
+
+theme = "juice"
+
+title = "Gradecoin"
+description = "Mine Your Grades"
+
+# Whether to automatically compile all Sass files in the sass directory
+compile_sass = true
+
+# Whether to build a search index to be used later on by a JavaScript library
+build_search_index = true
+
+[markdown]
+# Whether to do syntax highlighting
+# Theme can be customised by setting the `highlight_theme` variable to a theme supported by Zola
+highlight_code = true
+highlight_theme = "subway-moscow"
+
+[extra]
+# Put all your custom variables here
+juice_logo_name = "Gradecoin"
+juice_logo_path = "gradecoin.png"
+juice_extra_menu = [
+    { title = "why?", link = "https://github.com/zhuowei/nft_ptr#why"}
+]
+
diff --git a/site/content/JWT.md b/site/content/JWT.md
new file mode 100644
index 0000000..46da1a2
--- /dev/null
+++ b/site/content/JWT.md
@@ -0,0 +1,41 @@
++++
+title = "JWT"
+description = "JSON Web Token Documentation"
+weight = 4
++++
+
+> JSON Web Tokens are representations of claims, or authorization proofs that fit into the `Header` of HTTP requests.
+
+# How?
+
+JWTs are used as the [MAC](https://en.wikipedia.org/wiki/Message_authentication_code) of operations that require authorization:
+- block proposal
+- transaction proposal.
+
+They are send alongside the JSON request body in the `Header`;
+
+```html
+Authorization: Bearer aaaaaa.bbbbbb.ccccc
+```
+
+Gradecoin uses 3 fields for the JWTs;
+
+```json
+{
+"tha": "Hash of the payload, check invididual references",
+"iat": "Issued At, Unix Time",
+"exp": "Expiration Time, epoch"
+}
+```
+
+- `tha` is explained in [blocks](@/block_docs.md) and [transactions](@/transaction_docs.md) documentations.
+- `iat` when the JWT was created in [Unix Time](https://en.wikipedia.org/wiki/Unix_time) format
+- `exp` when the JWT will expire & be rejected in [Unix Time](https://en.wikipedia.org/wiki/Unix_time)
+
+# Algorithm
+We are using [RS256](https://www.rfc-editor.org/rfc/rfc7518.html#section-3.1), `RSASSA-PKCS1-v1_5 using SHA-256`. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works [here](https://jwt.io/).
+
+# References
+- [RFC, the ultimate reference](https://tools.ietf.org/html/rfc7519)
+- [JWT Debugger](https://jwt.io/)
+
diff --git a/site/content/_index.md b/site/content/_index.md
new file mode 100644
index 0000000..4ad0544
--- /dev/null
+++ b/site/content/_index.md
@@ -0,0 +1,85 @@
++++
+title = "Gradecoin"
+sort_by = "weight"
++++
+
+# Welcome to Gradecoin!
+
+Blockchains are incredibly simple yet can appear very complicated, we will see how they work and practice programming _production_ cryptography code.
+
+This server is the sandbox for the PA1, it's currently running the Gradecoin application. Gradecoin is the faux currency we will use to simulate a blockchain network. At the end of the simulation, the amount of Gradecoin you hold will be your PA1 grade.
+
+**A quick summary**: authenticate yourself to the system using public key encryption.
+Craft [Transaction](@/transaction_docs.md) proposals and tag them using [JWTs](@/JWT.md).
+When there are enough transactions then you can propose [Blocks](@/block_docs.md) in the same way.
+Blocks need to be _mined_ beforehand using Proof-of-work, or brute force.
+
+Gradecoin offers 3 endpoints at [/register](/register), [/block](/block) and [/transaction](/transaction). You can only send GET requests to /block and /transaction without authorization.
+The server is programmed in [RESTful](https://www.service-architecture.com/articles/web-services/representational_state_transfer_rest.html) architecture, there are no `DELETE`, `PUT` or `UPDATE` operations, though.
+
+Gradecoin uses a Proof-of-work block accepting mechanism. It uses single round [Blake2s](https://www.blake2.net/) hashing which produces 256-bit (64 hexadecimal characters) output. The [target](https://wiki.bitcoinsv.io/index.php/Target) hash is _24 bits_ or _6 hexadecimal characters_ of 0. During testing, I could mine a block on average around 2-7 minutes.
+
+> We're expecting you to use existing tools and implementations. Standards are hard. [Don't roll your own crypto](https://www.reddit.com/r/crypto/comments/2coqsy/dont_roll_your_own/). Feel free to ask questions. Collaborate.
+
+You might ask,
+
+> But if nobody has any Gradecoin then how do we have transactions?
+
+There is a bank! Their public key is `31415926535897932384626433832795028841971693993751058209749445923` and they have some amount of Gradecoin preloaded. It's also the only account that you can send transactions requests _to_ yourself.
+
+# Coinbase
+The first transactions of a block is called the `coinbase`. They are the **author** of the block proposal and if the block is accepted then they get compensated for their efforts with some Gradecoin.
+
+# Public Key Signatures
+Gradecoin uses 2048 bit RSA keyspairs.
+
+# Services
+## /register
+- Student creates their own 2048 bit RSA `keypair`
+- Downloads `Gradecoin`'s Public Key from [Moodle](https://odtuclass.metu.edu.tr/my/)
+- Encrypts their JSON wrapped `Public Key`, `Student ID` and one time `passwd` using Gradecoin's Public Key
+- Their public key is now in our database and can be used to sign their JWT's during requests
+
+## /transaction
+- You can offer a [Transaction](/transaction) - POST request
+    - The request should have `Authorization`
+    - The request header should be signed by the Public Key of the `by` field in the transaction
+- fetch the list of `Transaction`s - GET request
+
+## /block
+- offer a [`schema::Block`] - POST request
+    - The request should have `Authorization`
+    - The [`schema::Block::transaction_list`] of the block should be a subset of [`schema::Db::pending_transactions`]
+- fetch the last accepted [`schema::Block`] - GET request
+
+`Authorization`: The request header should have Bearer JWT.Token signed with Student Public Key
+
+# Questions
+## This all sound complicated!
+- I've drawn inspiration from [actual Bitcoin transactions](https://explorer.bitcoin.com/btc) and [warp](https://github.com/seanmonstar/warp/blob/master/examples/todos.rs). The simplicity of the system is how little interfaces it has.
+- Don't know where to start? Gradecoin uses RESTful API; simple `curl` commands or even your browser will work! [This website can help as well](https://curl.trillworks.com/).
+- [JWT Debugger](https://jwt.io) and the corresponding [RFC](https://tools.ietf.org/html/rfc7519)
+- Remember that you are absolutely encouraged to grab off-the-shelf implementations for every cryptography primitive you will use. You can start by finding a code snippet to generate a RSA keypair?
+
+## I found a bug!
+Thank you! Please [let me know](mailto:yigit@ceng.metu.edu.tr) so we can solve it.
+
+## I hacked the server!
+That wasn't supposed to happen :( I did not place any intentional vulnerabilities to the system so if you cracked something, it was not intended. Please don't abuse it and let me know so I can patch it.
+
+## Submission?
+At the end of the _simulation_, your Gradecoin balance will be your grade. I will also expect a unique client programmed in either;
+- c
+- c++
+- perl
+- rust
+- python
+- random assortment of bash scripts
+
+If your favourite programming language is missing please let me know 🤷?
+
+## Can my friends play?
+Sadly, no. Student's who are enrolled to the class will receive one-time-passwords for authentication.
+
+## How and or Why?
+- [Built](https://xkcd.com/2314/), [with](https://lofi.cafe/) [Rust](https://xkcd.com/2418/)
diff --git a/site/content/block_docs.md b/site/content/block_docs.md
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index 0000000..c1d61e9
--- /dev/null
+++ b/site/content/block_docs.md
@@ -0,0 +1,30 @@
++++
+title = "Blocks"
+description = "Block Documentation"
+weight = 10
++++
+
+A block that was proposed to commit Transactions in `transaction_list` to the
+ledger with a nonce that made `hash` valid; 6 zeroes at the left hand side of the
+hash (24 bytes).
+
+We are _mining_ using [blake2s](https://www.blake2.net/) algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.
+
+# Requests
+
+## GET
+A HTTP `GET` request to [/block](/block) endpoint will return the latest mined block.
+
+## POST
+
+A HTTP `POST` request with Authorization using JWT will allow you to propose your own blocks.
+
+# Fields
+```
+transaction_list: [array of Fingerprints]
+nonce: unsigned 32-bit integer
+timestamp: ISO 8601 <date>T<time>
+hash: String
+```
+
+[ISO 8601 Reference](https://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations)
diff --git a/site/content/register_docs.md b/site/content/register_docs.md
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+++ b/site/content/register_docs.md
@@ -0,0 +1,39 @@
++++
+title = "Register"
+description = "Register Documentation"
+weight = 3
++++
+
+POST request to /register endpoint
+
+Lets a user to authenticate themselves to the system.
+Only people who are enrolled to the class can open Gradecoin accounts.
+This is enforced with your Student ID and a one time password you will receive.
+
+# Authentication Process
+- Gradecoin's Public Key (`gradecoin_public_key`) is listed on our Moodle page.
+- You pick a short temporary key (`k_temp`)
+- Create a JSON object (`auth_plaintext`) with your `metu_id` and `public key` in base64 (PEM) format (`S_PK`) [reference](https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem)
+```json
+{
+    "student_id": "e12345",
+    "passwd": "15 char secret",
+    "public_key": "---BEGIN PUBLIC KEY..."
+}
+```
+
+- Pick a random IV.
+- Encrypt the serialized string of `auth_plaintext` with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (`k_temp`), the result is `auth_ciphertext`. Encode this with base64.
+- The temporary key you have picked `k_temp` is encrypted using RSA with OAEP padding scheme
+using SHA-256 with `gradecoin_public_key`, giving us `key_ciphertext`. Encode this with base 64.
+- The payload JSON object (`auth_request`) can be serialized now:
+
+```json
+{
+    "c": "auth_ciphertext",
+    "iv": "hexadecimal",
+    "key": "key_ciphertext"
+}
+```
+
+If your authentication process was valid, you will be given access and your public key fingerprint that is your address.
diff --git a/site/content/transaction_docs.md b/site/content/transaction_docs.md
new file mode 100644
index 0000000..820c35f
--- /dev/null
+++ b/site/content/transaction_docs.md
@@ -0,0 +1,26 @@
++++
+title = "Transactions"
+description = "Transaction documentation"
+weight = 6
++++
+
+A transaction request between `source` and `target` to move `amount` Gradecoin.
+
+# Requests
+
+## GET
+A HTTP `GET` request to [/transaction](/transaction) endpoint will return the current list of pending transactions.
+
+## POST
+
+A HTTP `POST` request with Authorization using JWT to [/transaction](/transactions) will allow you to propose your own transactions.
+
+
+# Fields
+```
+by: Fingerprint
+source: Fingerprint
+target: Fingerprint
+amount: unsigned 16 bit integer
+timestamp: ISO 8601 <date>T<time>
+```
diff --git a/site/public/404.html b/site/public/404.html
new file mode 100644
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--- /dev/null
+++ b/site/public/404.html
@@ -0,0 +1,3 @@
+<!doctype html>
+<title>404 Not Found</title>
+<h1>404 Not Found</h1>
diff --git a/site/public/android-chrome-192x192.png b/site/public/android-chrome-192x192.png
new file mode 100644
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--- /dev/null
+++ b/site/public/android-chrome-192x192.png
diff --git a/site/public/android-chrome-512x512.png b/site/public/android-chrome-512x512.png
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+++ b/site/public/android-chrome-512x512.png
diff --git a/site/public/apple-touch-icon.png b/site/public/apple-touch-icon.png
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--- /dev/null
+++ b/site/public/apple-touch-icon.png
diff --git a/site/public/block-docs/index.html b/site/public/block-docs/index.html
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--- /dev/null
+++ b/site/public/block-docs/index.html
@@ -0,0 +1,168 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Blocks | Gradecoin </title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
+
+    <link href="https://fonts.googleapis.com/css?family=Alfa+Slab+One&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Fira+Sans:400,500,600&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/normalize.css">
+    <link rel="stylesheet" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;juice.css">
+    
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+
+</head>
+
+<body>
+    
+<header class="box-shadow">
+    
+
+<a href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;">
+    <div class="logo">
+        <img src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png" alt="logo">
+        Gradecoin
+    </div>
+</a>
+
+<nav>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;register-docs&#x2F;">Register</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;jwt&#x2F;">JWT</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;transaction-docs&#x2F;">Transactions</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;block-docs&#x2F;">Blocks</a>
+    
+    
+        
+        <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;github.com&#x2F;zhuowei&#x2F;nft_ptr#why">why?</a>
+        
+    
+</nav>
+
+</header>
+
+
+    <main>
+        
+        
+        
+        
+        
+        <div class="toc">
+            <div class="toc-sticky">
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/block-docs/#requests">Requests</a>
+                </div>
+                
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/block-docs/#get"><small>- GET</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/block-docs/#post"><small>- POST</small></a>
+                </div>
+                
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/block-docs/#fields">Fields</a>
+                </div>
+                
+                
+            </div>
+        </div>
+        
+        
+
+        <div class="content text">
+            
+<div class="heading-text">Block Documentation</div>
+<p>A block that was proposed to commit Transactions in <code>transaction_list</code> to the
+ledger with a nonce that made <code>hash</code> valid; 6 zeroes at the left hand side of the
+hash (24 bytes).</p>
+<p>We are <em>mining</em> using <a href="https://www.blake2.net/">blake2s</a> algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.</p>
+<h1 id="requests">Requests</h1>
+<h2 id="get">GET</h2>
+<p>A HTTP <code>GET</code> request to <a href="/block">/block</a> endpoint will return the latest mined block.</p>
+<h2 id="post">POST</h2>
+<p>A HTTP <code>POST</code> request with Authorization using JWT will allow you to propose your own blocks.</p>
+<h1 id="fields">Fields</h1>
+<pre style="background-color:#ffffff;">
+<code><span style="color:#545052;">transaction_list: [array of Fingerprints]
+nonce: unsigned 32-bit integer
+timestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;
+hash: String
+</span></code></pre>
+<p><a href="https://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations">ISO 8601 Reference</a></p>
+
+
+        </div>
+
+        
+        
+    </main>
+
+    
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+
+</body>
+<script>
+    function highlightNav(heading) {
+        let pathname = location.pathname;
+        document.querySelectorAll(".toc a").forEach((item) => {
+            item.classList.remove("active");
+        });
+        document.querySelector(".toc a[href$='" + pathname + "#" + heading + "']").classList.add("active");
+    }
+
+    let currentHeading = "";
+    window.onscroll = function () {
+        let h = document.querySelectorAll("h1,h2,h3,h4,h5,h6");
+        let elementArr = [];
+
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+        for (let key in elementArr) {
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+                    highlightNav(key);
+                    currentHeading = key;
+                }
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+            }
+        }
+    }
+</script>
+
+</html>
diff --git a/site/public/elasticlunr.min.js b/site/public/elasticlunr.min.js
new file mode 100644
index 0000000..79dad65
--- /dev/null
+++ b/site/public/elasticlunr.min.js
@@ -0,0 +1,10 @@
+/**
+ * elasticlunr - http://weixsong.github.io
+ * Lightweight full-text search engine in Javascript for browser search and offline search. - 0.9.6
+ *
+ * Copyright (C) 2017 Oliver Nightingale
+ * Copyright (C) 2017 Wei Song
+ * MIT Licensed
+ * @license
+ */
+!function(){function e(e){if(null===e||"object"!=typeof e)return e;var t=e.constructor();for(var n in e)e.hasOwnProperty(n)&&(t[n]=e[n]);return t}var t=function(e){var n=new t.Index;return n.pipeline.add(t.trimmer,t.stopWordFilter,t.stemmer),e&&e.call(n,n),n};t.version="0.9.5",lunr=t,t.utils={},t.utils.warn=function(e){return function(t){e.console&&console.warn&&console.warn(t)}}(this),t.utils.toString=function(e){return void 0===e||null===e?"":e.toString()},t.EventEmitter=function(){this.events={}},t.EventEmitter.prototype.addListener=function(){var e=Array.prototype.slice.call(arguments),t=e.pop(),n=e;if("function"!=typeof t)throw new TypeError("last argument must be a function");n.forEach(function(e){this.hasHandler(e)||(this.events[e]=[]),this.events[e].push(t)},this)},t.EventEmitter.prototype.removeListener=function(e,t){if(this.hasHandler(e)){var n=this.events[e].indexOf(t);-1!==n&&(this.events[e].splice(n,1),0==this.events[e].length&&delete this.events[e])}},t.EventEmitter.prototype.emit=function(e){if(this.hasHandler(e)){var t=Array.prototype.slice.call(arguments,1);this.events[e].forEach(function(e){e.apply(void 0,t)},this)}},t.EventEmitter.prototype.hasHandler=function(e){return e in this.events},t.tokenizer=function(e){if(!arguments.length||null===e||void 0===e)return[];if(Array.isArray(e)){var n=e.filter(function(e){return null===e||void 0===e?!1:!0});n=n.map(function(e){return t.utils.toString(e).toLowerCase()});var i=[];return n.forEach(function(e){var n=e.split(t.tokenizer.seperator);i=i.concat(n)},this),i}return e.toString().trim().toLowerCase().split(t.tokenizer.seperator)},t.tokenizer.defaultSeperator=/[\s\-]+/,t.tokenizer.seperator=t.tokenizer.defaultSeperator,t.tokenizer.setSeperator=function(e){null!==e&&void 0!==e&&"object"==typeof e&&(t.tokenizer.seperator=e)},t.tokenizer.resetSeperator=function(){t.tokenizer.seperator=t.tokenizer.defaultSeperator},t.tokenizer.getSeperator=function(){return t.tokenizer.seperator},t.Pipeline=function(){this._queue=[]},t.Pipeline.registeredFunctions={},t.Pipeline.registerFunction=function(e,n){n in t.Pipeline.registeredFunctions&&t.utils.warn("Overwriting existing registered function: "+n),e.label=n,t.Pipeline.registeredFunctions[n]=e},t.Pipeline.getRegisteredFunction=function(e){return e in t.Pipeline.registeredFunctions!=!0?null:t.Pipeline.registeredFunctions[e]},t.Pipeline.warnIfFunctionNotRegistered=function(e){var n=e.label&&e.label in this.registeredFunctions;n||t.utils.warn("Function is not registered with pipeline. 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importing "+e.version);var n=new this;n._fields=e.fields,n._ref=e.ref,n.documentStore=t.DocumentStore.load(e.documentStore),n.pipeline=t.Pipeline.load(e.pipeline),n.index={};for(var i in e.index)n.index[i]=t.InvertedIndex.load(e.index[i]);return n},t.Index.prototype.addField=function(e){return this._fields.push(e),this.index[e]=new t.InvertedIndex,this},t.Index.prototype.setRef=function(e){return this._ref=e,this},t.Index.prototype.saveDocument=function(e){return this.documentStore=new t.DocumentStore(e),this},t.Index.prototype.addDoc=function(e,n){if(e){var n=void 0===n?!0:n,i=e[this._ref];this.documentStore.addDoc(i,e),this._fields.forEach(function(n){var o=this.pipeline.run(t.tokenizer(e[n]));this.documentStore.addFieldLength(i,n,o.length);var r={};o.forEach(function(e){e in r?r[e]+=1:r[e]=1},this);for(var s in r){var u=r[s];u=Math.sqrt(u),this.index[n].addToken(s,{ref:i,tf:u})}},this),n&&this.eventEmitter.emit("add",e,this)}},t.Index.prototype.removeDocByRef=function(e){if(e&&this.documentStore.isDocStored()!==!1&&this.documentStore.hasDoc(e)){var t=this.documentStore.getDoc(e);this.removeDoc(t,!1)}},t.Index.prototype.removeDoc=function(e,n){if(e){var n=void 0===n?!0:n,i=e[this._ref];this.documentStore.hasDoc(i)&&(this.documentStore.removeDoc(i),this._fields.forEach(function(n){var o=this.pipeline.run(t.tokenizer(e[n]));o.forEach(function(e){this.index[n].removeToken(e,i)},this)},this),n&&this.eventEmitter.emit("remove",e,this))}},t.Index.prototype.updateDoc=function(e,t){var t=void 0===t?!0:t;this.removeDocByRef(e[this._ref],!1),this.addDoc(e,!1),t&&this.eventEmitter.emit("update",e,this)},t.Index.prototype.idf=function(e,t){var n="@"+t+"/"+e;if(Object.prototype.hasOwnProperty.call(this._idfCache,n))return this._idfCache[n];var i=this.index[t].getDocFreq(e),o=1+Math.log(this.documentStore.length/(i+1));return this._idfCache[n]=o,o},t.Index.prototype.getFields=function(){return this._fields.slice()},t.Index.prototype.search=function(e,n){if(!e)return[];e="string"==typeof e?{any:e}:JSON.parse(JSON.stringify(e));var i=null;null!=n&&(i=JSON.stringify(n));for(var o=new t.Configuration(i,this.getFields()).get(),r={},s=Object.keys(e),u=0;u<s.length;u++){var a=s[u];r[a]=this.pipeline.run(t.tokenizer(e[a]))}var l={};for(var c in o){var d=r[c]||r.any;if(d){var f=this.fieldSearch(d,c,o),h=o[c].boost;for(var p in f)f[p]=f[p]*h;for(var p in f)p in l?l[p]+=f[p]:l[p]=f[p]}}var v,g=[];for(var p in l)v={ref:p,score:l[p]},this.documentStore.hasDoc(p)&&(v.doc=this.documentStore.getDoc(p)),g.push(v);return g.sort(function(e,t){return t.score-e.score}),g},t.Index.prototype.fieldSearch=function(e,t,n){var i=n[t].bool,o=n[t].expand,r=n[t].boost,s=null,u={};return 0!==r?(e.forEach(function(e){var n=[e];1==o&&(n=this.index[t].expandToken(e));var r={};n.forEach(function(n){var o=this.index[t].getDocs(n),a=this.idf(n,t);if(s&&"AND"==i){var l={};for(var c in s)c in o&&(l[c]=o[c]);o=l}n==e&&this.fieldSearchStats(u,n,o);for(var c in o){var d=this.index[t].getTermFrequency(n,c),f=this.documentStore.getFieldLength(c,t),h=1;0!=f&&(h=1/Math.sqrt(f));var p=1;n!=e&&(p=.15*(1-(n.length-e.length)/n.length));var v=d*a*h*p;c in r?r[c]+=v:r[c]=v}},this),s=this.mergeScores(s,r,i)},this),s=this.coordNorm(s,u,e.length)):void 0},t.Index.prototype.mergeScores=function(e,t,n){if(!e)return t;if("AND"==n){var i={};for(var o in t)o in e&&(i[o]=e[o]+t[o]);return i}for(var o in t)o in e?e[o]+=t[o]:e[o]=t[o];return e},t.Index.prototype.fieldSearchStats=function(e,t,n){for(var i in n)i in e?e[i].push(t):e[i]=[t]},t.Index.prototype.coordNorm=function(e,t,n){for(var i in e)if(i in t){var o=t[i].length;e[i]=e[i]*o/n}return e},t.Index.prototype.toJSON=function(){var e={};return this._fields.forEach(function(t){e[t]=this.index[t].toJSON()},this),{version:t.version,fields:this._fields,ref:this._ref,documentStore:this.documentStore.toJSON(),index:e,pipeline:this.pipeline.toJSON()}},t.Index.prototype.use=function(e){var t=Array.prototype.slice.call(arguments,1);t.unshift(this),e.apply(this,t)},t.DocumentStore=function(e){this._save=null===e||void 0===e?!0:e,this.docs={},this.docInfo={},this.length=0},t.DocumentStore.load=function(e){var t=new this;return t.length=e.length,t.docs=e.docs,t.docInfo=e.docInfo,t._save=e.save,t},t.DocumentStore.prototype.isDocStored=function(){return this._save},t.DocumentStore.prototype.addDoc=function(t,n){this.hasDoc(t)||this.length++,this.docs[t]=this._save===!0?e(n):null},t.DocumentStore.prototype.getDoc=function(e){return this.hasDoc(e)===!1?null:this.docs[e]},t.DocumentStore.prototype.hasDoc=function(e){return e in this.docs},t.DocumentStore.prototype.removeDoc=function(e){this.hasDoc(e)&&(delete this.docs[e],delete this.docInfo[e],this.length--)},t.DocumentStore.prototype.addFieldLength=function(e,t,n){null!==e&&void 0!==e&&0!=this.hasDoc(e)&&(this.docInfo[e]||(this.docInfo[e]={}),this.docInfo[e][t]=n)},t.DocumentStore.prototype.updateFieldLength=function(e,t,n){null!==e&&void 0!==e&&0!=this.hasDoc(e)&&this.addFieldLength(e,t,n)},t.DocumentStore.prototype.getFieldLength=function(e,t){return null===e||void 0===e?0:e in this.docs&&t in this.docInfo[e]?this.docInfo[e][t]:0},t.DocumentStore.prototype.toJSON=function(){return{docs:this.docs,docInfo:this.docInfo,length:this.length,save:this._save}},t.stemmer=function(){var e={ational:"ate",tional:"tion",enci:"ence",anci:"ance",izer:"ize",bli:"ble",alli:"al",entli:"ent",eli:"e",ousli:"ous",ization:"ize",ation:"ate",ator:"ate",alism:"al",iveness:"ive",fulness:"ful",ousness:"ous",aliti:"al",iviti:"ive",biliti:"ble",logi:"log"},t={icate:"ic",ative:"",alize:"al",iciti:"ic",ical:"ic",ful:"",ness:""},n="[^aeiou]",i="[aeiouy]",o=n+"[^aeiouy]*",r=i+"[aeiou]*",s="^("+o+")?"+r+o,u="^("+o+")?"+r+o+"("+r+")?$",a="^("+o+")?"+r+o+r+o,l="^("+o+")?"+i,c=new RegExp(s),d=new RegExp(a),f=new RegExp(u),h=new RegExp(l),p=/^(.+?)(ss|i)es$/,v=/^(.+?)([^s])s$/,g=/^(.+?)eed$/,m=/^(.+?)(ed|ing)$/,y=/.$/,S=/(at|bl|iz)$/,x=new RegExp("([^aeiouylsz])\\1$"),w=new RegExp("^"+o+i+"[^aeiouwxy]$"),I=/^(.+?[^aeiou])y$/,b=/^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/,E=/^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/,D=/^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/,F=/^(.+?)(s|t)(ion)$/,_=/^(.+?)e$/,P=/ll$/,k=new RegExp("^"+o+i+"[^aeiouwxy]$"),z=function(n){var i,o,r,s,u,a,l;if(n.length<3)return n;if(r=n.substr(0,1),"y"==r&&(n=r.toUpperCase()+n.substr(1)),s=p,u=v,s.test(n)?n=n.replace(s,"$1$2"):u.test(n)&&(n=n.replace(u,"$1$2")),s=g,u=m,s.test(n)){var z=s.exec(n);s=c,s.test(z[1])&&(s=y,n=n.replace(s,""))}else if(u.test(n)){var z=u.exec(n);i=z[1],u=h,u.test(i)&&(n=i,u=S,a=x,l=w,u.test(n)?n+="e":a.test(n)?(s=y,n=n.replace(s,"")):l.test(n)&&(n+="e"))}if(s=I,s.test(n)){var z=s.exec(n);i=z[1],n=i+"i"}if(s=b,s.test(n)){var z=s.exec(n);i=z[1],o=z[2],s=c,s.test(i)&&(n=i+e[o])}if(s=E,s.test(n)){var z=s.exec(n);i=z[1],o=z[2],s=c,s.test(i)&&(n=i+t[o])}if(s=D,u=F,s.test(n)){var z=s.exec(n);i=z[1],s=d,s.test(i)&&(n=i)}else if(u.test(n)){var z=u.exec(n);i=z[1]+z[2],u=d,u.test(i)&&(n=i)}if(s=_,s.test(n)){var z=s.exec(n);i=z[1],s=d,u=f,a=k,(s.test(i)||u.test(i)&&!a.test(i))&&(n=i)}return s=P,u=d,s.test(n)&&u.test(n)&&(s=y,n=n.replace(s,"")),"y"==r&&(n=r.toLowerCase()+n.substr(1)),n};return z}(),t.Pipeline.registerFunction(t.stemmer,"stemmer"),t.stopWordFilter=function(e){return e&&t.stopWordFilter.stopWords[e]!==!0?e:void 0},t.clearStopWords=function(){t.stopWordFilter.stopWords={}},t.addStopWords=function(e){null!=e&&Array.isArray(e)!==!1&&e.forEach(function(e){t.stopWordFilter.stopWords[e]=!0},this)},t.resetStopWords=function(){t.stopWordFilter.stopWords=t.defaultStopWords},t.defaultStopWords={"":!0,a:!0,able:!0,about:!0,across:!0,after:!0,all:!0,almost:!0,also:!0,am:!0,among:!0,an:!0,and:!0,any:!0,are:!0,as:!0,at:!0,be:!0,because:!0,been:!0,but:!0,by:!0,can:!0,cannot:!0,could:!0,dear:!0,did:!0,"do":!0,does:!0,either:!0,"else":!0,ever:!0,every:!0,"for":!0,from:!0,get:!0,got:!0,had:!0,has:!0,have:!0,he:!0,her:!0,hers:!0,him:!0,his:!0,how:!0,however:!0,i:!0,"if":!0,"in":!0,into:!0,is:!0,it:!0,its:!0,just:!0,least:!0,let:!0,like:!0,likely:!0,may:!0,me:!0,might:!0,most:!0,must:!0,my:!0,neither:!0,no:!0,nor:!0,not:!0,of:!0,off:!0,often:!0,on:!0,only:!0,or:!0,other:!0,our:!0,own:!0,rather:!0,said:!0,say:!0,says:!0,she:!0,should:!0,since:!0,so:!0,some:!0,than:!0,that:!0,the:!0,their:!0,them:!0,then:!0,there:!0,these:!0,they:!0,"this":!0,tis:!0,to:!0,too:!0,twas:!0,us:!0,wants:!0,was:!0,we:!0,were:!0,what:!0,when:!0,where:!0,which:!0,"while":!0,who:!0,whom:!0,why:!0,will:!0,"with":!0,would:!0,yet:!0,you:!0,your:!0},t.stopWordFilter.stopWords=t.defaultStopWords,t.Pipeline.registerFunction(t.stopWordFilter,"stopWordFilter"),t.trimmer=function(e){if(null===e||void 0===e)throw new Error("token should not be undefined");return e.replace(/^\W+/,"").replace(/\W+$/,"")},t.Pipeline.registerFunction(t.trimmer,"trimmer"),t.InvertedIndex=function(){this.root={docs:{},df:0}},t.InvertedIndex.load=function(e){var t=new this;return t.root=e.root,t},t.InvertedIndex.prototype.addToken=function(e,t,n){for(var n=n||this.root,i=0;i<=e.length-1;){var o=e[i];o in n||(n[o]={docs:{},df:0}),i+=1,n=n[o]}var r=t.ref;n.docs[r]?n.docs[r]={tf:t.tf}:(n.docs[r]={tf:t.tf},n.df+=1)},t.InvertedIndex.prototype.hasToken=function(e){if(!e)return!1;for(var t=this.root,n=0;n<e.length;n++){if(!t[e[n]])return!1;t=t[e[n]]}return!0},t.InvertedIndex.prototype.getNode=function(e){if(!e)return null;for(var t=this.root,n=0;n<e.length;n++){if(!t[e[n]])return null;t=t[e[n]]}return t},t.InvertedIndex.prototype.getDocs=function(e){var t=this.getNode(e);return null==t?{}:t.docs},t.InvertedIndex.prototype.getTermFrequency=function(e,t){var n=this.getNode(e);return null==n?0:t in n.docs?n.docs[t].tf:0},t.InvertedIndex.prototype.getDocFreq=function(e){var t=this.getNode(e);return null==t?0:t.df},t.InvertedIndex.prototype.removeToken=function(e,t){if(e){var n=this.getNode(e);null!=n&&t in n.docs&&(delete n.docs[t],n.df-=1)}},t.InvertedIndex.prototype.expandToken=function(e,t,n){if(null==e||""==e)return[];var t=t||[];if(void 0==n&&(n=this.getNode(e),null==n))return t;n.df>0&&t.push(e);for(var i in n)"docs"!==i&&"df"!==i&&this.expandToken(e+i,t,n[i]);return t},t.InvertedIndex.prototype.toJSON=function(){return{root:this.root}},t.Configuration=function(e,n){var e=e||"";if(void 0==n||null==n)throw new Error("fields should not be null");this.config={};var i;try{i=JSON.parse(e),this.buildUserConfig(i,n)}catch(o){t.utils.warn("user configuration parse failed, will use default configuration"),this.buildDefaultConfig(n)}},t.Configuration.prototype.buildDefaultConfig=function(e){this.reset(),e.forEach(function(e){this.config[e]={boost:1,bool:"OR",expand:!1}},this)},t.Configuration.prototype.buildUserConfig=function(e,n){var i="OR",o=!1;if(this.reset(),"bool"in e&&(i=e.bool||i),"expand"in e&&(o=e.expand||o),"fields"in e)for(var r in e.fields)if(n.indexOf(r)>-1){var s=e.fields[r],u=o;void 0!=s.expand&&(u=s.expand),this.config[r]={boost:s.boost||0===s.boost?s.boost:1,bool:s.bool||i,expand:u}}else t.utils.warn("field name in user configuration not found in index instance fields");else this.addAllFields2UserConfig(i,o,n)},t.Configuration.prototype.addAllFields2UserConfig=function(e,t,n){n.forEach(function(n){this.config[n]={boost:1,bool:e,expand:t}},this)},t.Configuration.prototype.get=function(){return this.config},t.Configuration.prototype.reset=function(){this.config={}},lunr.SortedSet=function(){this.length=0,this.elements=[]},lunr.SortedSet.load=function(e){var t=new this;return t.elements=e,t.length=e.length,t},lunr.SortedSet.prototype.add=function(){var e,t;for(e=0;e<arguments.length;e++)t=arguments[e],~this.indexOf(t)||this.elements.splice(this.locationFor(t),0,t);this.length=this.elements.length},lunr.SortedSet.prototype.toArray=function(){return this.elements.slice()},lunr.SortedSet.prototype.map=function(e,t){return this.elements.map(e,t)},lunr.SortedSet.prototype.forEach=function(e,t){return this.elements.forEach(e,t)},lunr.SortedSet.prototype.indexOf=function(e){for(var t=0,n=this.elements.length,i=n-t,o=t+Math.floor(i/2),r=this.elements[o];i>1;){if(r===e)return o;e>r&&(t=o),r>e&&(n=o),i=n-t,o=t+Math.floor(i/2),r=this.elements[o]}return r===e?o:-1},lunr.SortedSet.prototype.locationFor=function(e){for(var t=0,n=this.elements.length,i=n-t,o=t+Math.floor(i/2),r=this.elements[o];i>1;)e>r&&(t=o),r>e&&(n=o),i=n-t,o=t+Math.floor(i/2),r=this.elements[o];return r>e?o:e>r?o+1:void 0},lunr.SortedSet.prototype.intersect=function(e){for(var t=new lunr.SortedSet,n=0,i=0,o=this.length,r=e.length,s=this.elements,u=e.elements;;){if(n>o-1||i>r-1)break;s[n]!==u[i]?s[n]<u[i]?n++:s[n]>u[i]&&i++:(t.add(s[n]),n++,i++)}return t},lunr.SortedSet.prototype.clone=function(){var e=new lunr.SortedSet;return e.elements=this.toArray(),e.length=e.elements.length,e},lunr.SortedSet.prototype.union=function(e){var t,n,i;this.length>=e.length?(t=this,n=e):(t=e,n=this),i=t.clone();for(var o=0,r=n.toArray();o<r.length;o++)i.add(r[o]);return i},lunr.SortedSet.prototype.toJSON=function(){return this.toArray()},function(e,t){"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():e.elasticlunr=t()}(this,function(){return t})}();
diff --git a/site/public/favicon-16x16.png b/site/public/favicon-16x16.png
new file mode 100644
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--- /dev/null
+++ b/site/public/favicon-16x16.png
diff --git a/site/public/favicon-32x32.png b/site/public/favicon-32x32.png
new file mode 100644
index 0000000..e343587
--- /dev/null
+++ b/site/public/favicon-32x32.png
diff --git a/site/public/favicon.ico b/site/public/favicon.ico
new file mode 100644
index 0000000..45d8bfe
--- /dev/null
+++ b/site/public/favicon.ico
diff --git a/site/public/gradecoin.png b/site/public/gradecoin.png
new file mode 100644
index 0000000..eeb670c
--- /dev/null
+++ b/site/public/gradecoin.png
diff --git a/site/public/index.html b/site/public/index.html
new file mode 100644
index 0000000..8986841
--- /dev/null
+++ b/site/public/index.html
@@ -0,0 +1,319 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Gradecoin</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
+
+    <link href="https://fonts.googleapis.com/css?family=Alfa+Slab+One&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Fira+Sans:400,500,600&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/normalize.css">
+    <link rel="stylesheet" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;juice.css">
+    
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+
+</head>
+
+<body>
+    
+
+    <header class="pos-absolute" style="background-color: transparent">
+        
+
+<a href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;">
+    <div class="logo">
+        <img src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png" alt="logo">
+        Gradecoin
+    </div>
+</a>
+
+<nav>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;register-docs&#x2F;">Register</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;jwt&#x2F;">JWT</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;transaction-docs&#x2F;">Transactions</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;block-docs&#x2F;">Blocks</a>
+    
+    
+        
+        <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;github.com&#x2F;zhuowei&#x2F;nft_ptr#why">why?</a>
+        
+    
+</nav>
+
+    </header>
+
+    <div class="hero">
+        
+<section class="text-center">
+    <h1 class="heading-text animate__animated animate__jackInTheBox" style="font-size: 50px">
+        Mine your own grades
+    </h1>
+    <h3 class="title-text">
+        <b>Gradecoin</b> is the latest cutting edge blockchain technology agile grading framework that drives organic engagement and other buzzwords, with big data mining search engine optimization
+    </h3>
+    <div>
+    </div>
+</section>
+<img class="hero-image" style="width: 40%" src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png">
+
+<div class="explore-more text"
+     onclick="document.getElementById('features').scrollIntoView({behavior: 'smooth'})">
+    ⇩ Learn How ⇩
+</div>
+<style>
+
+.hero section {
+    padding: 0 5rem;
+}
+
+@media screen and (max-width: 768px) {
+    .hero section {
+        padding: 0 2rem;
+    }
+
+    .hero-image {
+        display: none
+    }
+
+}
+footer {
+    color: #8b8b8b;
+}
+</style>
+
+    </div>
+
+    
+
+    <main>
+        
+        
+        
+        
+        
+        <div class="toc">
+            <div class="toc-sticky">
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/#welcome-to-gradecoin">Welcome to Gradecoin!</a>
+                </div>
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/#coinbase">Coinbase</a>
+                </div>
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/#public-key-signatures">Public Key Signatures</a>
+                </div>
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/#services">Services</a>
+                </div>
+                
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#register"><small>- &#x2F;register</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#transaction"><small>- &#x2F;transaction</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#block"><small>- &#x2F;block</small></a>
+                </div>
+                
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/#questions">Questions</a>
+                </div>
+                
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#this-all-sound-complicated"><small>- This all sound complicated!</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#i-found-a-bug"><small>- I found a bug!</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#i-hacked-the-server"><small>- I hacked the server!</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#submission"><small>- Submission?</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#can-my-friends-play"><small>- Can my friends play?</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/#how-and-or-why"><small>- How and or Why?</small></a>
+                </div>
+                
+                
+                
+            </div>
+        </div>
+        
+        
+
+        <div class="content text">
+            
+            <div id="features" class="heading-text">Overview</div>
+            <h1 id="welcome-to-gradecoin">Welcome to Gradecoin!</h1>
+<p>Blockchains are incredibly simple yet can appear very complicated, we will see how they work and practice programming <em>production</em> cryptography code.</p>
+<p>This server is the sandbox for the PA1, it's currently running the Gradecoin application. Gradecoin is the faux currency we will use to simulate a blockchain network. At the end of the simulation, the amount of Gradecoin you hold will be your PA1 grade.</p>
+<p><strong>A quick summary</strong>: authenticate yourself to the system using public key encryption.
+Craft <a href="https://gradecoin.xyz/transaction-docs/">Transaction</a> proposals and tag them using <a href="https://gradecoin.xyz/jwt/">JWTs</a>.
+When there are enough transactions then you can propose <a href="https://gradecoin.xyz/block-docs/">Blocks</a> in the same way.
+Blocks need to be <em>mined</em> beforehand using Proof-of-work, or brute force.</p>
+<p>Gradecoin offers 3 endpoints at <a href="/register">/register</a>, <a href="/block">/block</a> and <a href="/transaction">/transaction</a>. You can only send GET requests to /block and /transaction without authorization.
+The server is programmed in <a href="https://www.service-architecture.com/articles/web-services/representational_state_transfer_rest.html">RESTful</a> architecture, there are no <code>DELETE</code>, <code>PUT</code> or <code>UPDATE</code> operations, though.</p>
+<p>Gradecoin uses a Proof-of-work block accepting mechanism. It uses single round <a href="https://www.blake2.net/">Blake2s</a> hashing which produces 256-bit (64 hexadecimal characters) output. The <a href="https://wiki.bitcoinsv.io/index.php/Target">target</a> hash is <em>24 bits</em> or <em>6 hexadecimal characters</em> of 0. During testing, I could mine a block on average around 2-7 minutes.</p>
+<blockquote>
+<p>We're expecting you to use existing tools and implementations. Standards are hard. <a href="https://www.reddit.com/r/crypto/comments/2coqsy/dont_roll_your_own/">Don't roll your own crypto</a>. Feel free to ask questions. Collaborate.</p>
+</blockquote>
+<p>You might ask,</p>
+<blockquote>
+<p>But if nobody has any Gradecoin then how do we have transactions?</p>
+</blockquote>
+<p>There is a bank! Their public key is <code>31415926535897932384626433832795028841971693993751058209749445923</code> and they have some amount of Gradecoin preloaded. It's also the only account that you can send transactions requests <em>to</em> yourself.</p>
+<h1 id="coinbase">Coinbase</h1>
+<p>The first transactions of a block is called the <code>coinbase</code>. They are the <strong>author</strong> of the block proposal and if the block is accepted then they get compensated for their efforts with some Gradecoin.</p>
+<h1 id="public-key-signatures">Public Key Signatures</h1>
+<p>Gradecoin uses 2048 bit RSA keyspairs.</p>
+<h1 id="services">Services</h1>
+<h2 id="register">/register</h2>
+<ul>
+<li>Student creates their own 2048 bit RSA <code>keypair</code></li>
+<li>Downloads <code>Gradecoin</code>'s Public Key from <a href="https://odtuclass.metu.edu.tr/my/">Moodle</a></li>
+<li>Encrypts their JSON wrapped <code>Public Key</code>, <code>Student ID</code> and one time <code>passwd</code> using Gradecoin's Public Key</li>
+<li>Their public key is now in our database and can be used to sign their JWT's during requests</li>
+</ul>
+<h2 id="transaction">/transaction</h2>
+<ul>
+<li>You can offer a <a href="/transaction">Transaction</a> - POST request
+<ul>
+<li>The request should have <code>Authorization</code></li>
+<li>The request header should be signed by the Public Key of the <code>by</code> field in the transaction</li>
+</ul>
+</li>
+<li>fetch the list of <code>Transaction</code>s - GET request</li>
+</ul>
+<h2 id="block">/block</h2>
+<ul>
+<li>offer a [<code>schema::Block</code>] - POST request
+<ul>
+<li>The request should have <code>Authorization</code></li>
+<li>The [<code>schema::Block::transaction_list</code>] of the block should be a subset of [<code>schema::Db::pending_transactions</code>]</li>
+</ul>
+</li>
+<li>fetch the last accepted [<code>schema::Block</code>] - GET request</li>
+</ul>
+<p><code>Authorization</code>: The request header should have Bearer JWT.Token signed with Student Public Key</p>
+<h1 id="questions">Questions</h1>
+<h2 id="this-all-sound-complicated">This all sound complicated!</h2>
+<ul>
+<li>I've drawn inspiration from <a href="https://explorer.bitcoin.com/btc">actual Bitcoin transactions</a> and <a href="https://github.com/seanmonstar/warp/blob/master/examples/todos.rs">warp</a>. The simplicity of the system is how little interfaces it has.</li>
+<li>Don't know where to start? Gradecoin uses RESTful API; simple <code>curl</code> commands or even your browser will work! <a href="https://curl.trillworks.com/">This website can help as well</a>.</li>
+<li><a href="https://jwt.io">JWT Debugger</a> and the corresponding <a href="https://tools.ietf.org/html/rfc7519">RFC</a></li>
+<li>Remember that you are absolutely encouraged to grab off-the-shelf implementations for every cryptography primitive you will use. You can start by finding a code snippet to generate a RSA keypair?</li>
+</ul>
+<h2 id="i-found-a-bug">I found a bug!</h2>
+<p>Thank you! Please <a href="mailto:yigit@ceng.metu.edu.tr">let me know</a> so we can solve it.</p>
+<h2 id="i-hacked-the-server">I hacked the server!</h2>
+<p>That wasn't supposed to happen :( I did not place any intentional vulnerabilities to the system so if you cracked something, it was not intended. Please don't abuse it and let me know so I can patch it.</p>
+<h2 id="submission">Submission?</h2>
+<p>At the end of the <em>simulation</em>, your Gradecoin balance will be your grade. I will also expect a unique client programmed in either;</p>
+<ul>
+<li>c</li>
+<li>c++</li>
+<li>perl</li>
+<li>rust</li>
+<li>python</li>
+<li>random assortment of bash scripts</li>
+</ul>
+<p>If your favourite programming language is missing please let me know 🤷?</p>
+<h2 id="can-my-friends-play">Can my friends play?</h2>
+<p>Sadly, no. Student's who are enrolled to the class will receive one-time-passwords for authentication.</p>
+<h2 id="how-and-or-why">How and or Why?</h2>
+<ul>
+<li><a href="https://xkcd.com/2314/">Built</a>, <a href="https://lofi.cafe/">with</a> <a href="https://xkcd.com/2418/">Rust</a></li>
+</ul>
+
+            
+        </div>
+
+        
+        
+    </main>
+
+    
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+
+</body>
+<script>
+    function highlightNav(heading) {
+        let pathname = location.pathname;
+        document.querySelectorAll(".toc a").forEach((item) => {
+            item.classList.remove("active");
+        });
+        document.querySelector(".toc a[href$='" + pathname + "#" + heading + "']").classList.add("active");
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diff --git a/site/public/jwt/index.html b/site/public/jwt/index.html
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+++ b/site/public/jwt/index.html
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+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>JWT | Gradecoin </title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
+
+    <link href="https://fonts.googleapis.com/css?family=Alfa+Slab+One&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Fira+Sans:400,500,600&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/normalize.css">
+    <link rel="stylesheet" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;juice.css">
+    
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+
+</head>
+
+<body>
+    
+<header class="box-shadow">
+    
+
+<a href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;">
+    <div class="logo">
+        <img src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png" alt="logo">
+        Gradecoin
+    </div>
+</a>
+
+<nav>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;register-docs&#x2F;">Register</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;jwt&#x2F;">JWT</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;transaction-docs&#x2F;">Transactions</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;block-docs&#x2F;">Blocks</a>
+    
+    
+        
+        <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;github.com&#x2F;zhuowei&#x2F;nft_ptr#why">why?</a>
+        
+    
+</nav>
+
+</header>
+
+
+    <main>
+        
+        
+        
+        
+        
+        <div class="toc">
+            <div class="toc-sticky">
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/jwt/#how">How?</a>
+                </div>
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/jwt/#algorithm">Algorithm</a>
+                </div>
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/jwt/#references">References</a>
+                </div>
+                
+                
+            </div>
+        </div>
+        
+        
+
+        <div class="content text">
+            
+<div class="heading-text">JSON Web Token Documentation</div>
+<blockquote>
+<p>JSON Web Tokens are representations of claims, or authorization proofs that fit into the <code>Header</code> of HTTP requests.</p>
+</blockquote>
+<h1 id="how">How?</h1>
+<p>JWTs are used as the <a href="https://en.wikipedia.org/wiki/Message_authentication_code">MAC</a> of operations that require authorization:</p>
+<ul>
+<li>block proposal</li>
+<li>transaction proposal.</li>
+</ul>
+<p>They are send alongside the JSON request body in the <code>Header</code>;</p>
+<pre style="background-color:#ffffff;">
+<code class="language-html" data-lang="html"><span style="color:#545052;">Authorization: Bearer aaaaaa.bbbbbb.ccccc
+</span></code></pre>
+<p>Gradecoin uses 3 fields for the JWTs;</p>
+<pre style="background-color:#ffffff;">
+<code class="language-json" data-lang="json"><span style="color:#545052;">{
+&quot;</span><span style="color:#009854;">tha</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">Hash of the payload, check invididual references</span><span style="color:#545052;">&quot;,
+&quot;</span><span style="color:#009854;">iat</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">Issued At, Unix Time</span><span style="color:#545052;">&quot;,
+&quot;</span><span style="color:#009854;">exp</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">Expiration Time, epoch</span><span style="color:#545052;">&quot;
+}
+</span></code></pre>
+<ul>
+<li><code>tha</code> is explained in <a href="https://gradecoin.xyz/block-docs/">blocks</a> and <a href="https://gradecoin.xyz/transaction-docs/">transactions</a> documentations.</li>
+<li><code>iat</code> when the JWT was created in <a href="https://en.wikipedia.org/wiki/Unix_time">Unix Time</a> format</li>
+<li><code>exp</code> when the JWT will expire &amp; be rejected in <a href="https://en.wikipedia.org/wiki/Unix_time">Unix Time</a></li>
+</ul>
+<h1 id="algorithm">Algorithm</h1>
+<p>We are using <a href="https://www.rfc-editor.org/rfc/rfc7518.html#section-3.1">RS256</a>, <code>RSASSA-PKCS1-v1_5 using SHA-256</code>. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works <a href="https://jwt.io/">here</a>.</p>
+<h1 id="references">References</h1>
+<ul>
+<li><a href="https://tools.ietf.org/html/rfc7519">RFC, the ultimate reference</a></li>
+<li><a href="https://jwt.io/">JWT Debugger</a></li>
+</ul>
+
+
+        </div>
+
+        
+        
+    </main>
+
+    
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+
+</body>
+<script>
+    function highlightNav(heading) {
+        let pathname = location.pathname;
+        document.querySelectorAll(".toc a").forEach((item) => {
+            item.classList.remove("active");
+        });
+        document.querySelector(".toc a[href$='" + pathname + "#" + heading + "']").classList.add("active");
+    }
+
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+                elementArr[item.id] = item.getBoundingClientRect().top;
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diff --git a/site/public/normalize.css b/site/public/normalize.css
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index 0000000..192eb9c
--- /dev/null
+++ b/site/public/normalize.css
@@ -0,0 +1,349 @@
+/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
+
+/* Document
+   ========================================================================== */
+
+/**
+ * 1. Correct the line height in all browsers.
+ * 2. Prevent adjustments of font size after orientation changes in iOS.
+ */
+
+html {
+  line-height: 1.15; /* 1 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/* Sections
+   ========================================================================== */
+
+/**
+ * Remove the margin in all browsers.
+ */
+
+body {
+  margin: 0;
+}
+
+/**
+ * Render the `main` element consistently in IE.
+ */
+
+main {
+  display: block;
+}
+
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
+ */
+
+h1 {
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+
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+/**
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge and IE.
+ */
+
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+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
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+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * Remove the gray background on active links in IE 10.
+ */
+
+a {
+  background-color: transparent;
+}
+
+/**
+ * 1. Remove the bottom border in Chrome 57-
+ * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
+ */
+
+abbr[title] {
+  border-bottom: none; /* 1 */
+  text-decoration: underline; /* 2 */
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+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
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+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
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+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
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+  vertical-align: baseline;
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+}
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+   ========================================================================== */
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+/**
+ * Remove the border on images inside links in IE 10.
+ */
+
+img {
+  border-style: none;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * 1. Change the font styles in all browsers.
+ * 2. Remove the margin in Firefox and Safari.
+ */
+
+button,
+input,
+optgroup,
+select,
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+  margin: 0; /* 2 */
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+ * 1. Show the overflow in Edge.
+ */
+
+button,
+input { /* 1 */
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+}
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+/**
+ * Remove the inheritance of text transform in Edge, Firefox, and IE.
+ * 1. Remove the inheritance of text transform in Firefox.
+ */
+
+button,
+select { /* 1 */
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+}
+
+/**
+ * Correct the inability to style clickable types in iOS and Safari.
+ */
+
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+[type="button"],
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+[type="submit"] {
+  -webkit-appearance: button;
+}
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+/**
+ * Remove the inner border and padding in Firefox.
+ */
+
+button::-moz-focus-inner,
+[type="button"]::-moz-focus-inner,
+[type="reset"]::-moz-focus-inner,
+[type="submit"]::-moz-focus-inner {
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+  padding: 0;
+}
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+/**
+ * Restore the focus styles unset by the previous rule.
+ */
+
+button:-moz-focusring,
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+[type="reset"]:-moz-focusring,
+[type="submit"]:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+/**
+ * Correct the padding in Firefox.
+ */
+
+fieldset {
+  padding: 0.35em 0.75em 0.625em;
+}
+
+/**
+ * 1. Correct the text wrapping in Edge and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ * 3. Remove the padding so developers are not caught out when they zero out
+ *    `fieldset` elements in all browsers.
+ */
+
+legend {
+  box-sizing: border-box; /* 1 */
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  padding: 0; /* 3 */
+  white-space: normal; /* 1 */
+}
+
+/**
+ * Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  vertical-align: baseline;
+}
+
+/**
+ * Remove the default vertical scrollbar in IE 10+.
+ */
+
+textarea {
+  overflow: auto;
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+/**
+ * 1. Add the correct box sizing in IE 10.
+ * 2. Remove the padding in IE 10.
+ */
+
+[type="checkbox"],
+[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Correct the cursor style of increment and decrement buttons in Chrome.
+ */
+
+[type="number"]::-webkit-inner-spin-button,
+[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * 1. Correct the odd appearance in Chrome and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+
+/**
+ * Remove the inner padding in Chrome and Safari on macOS.
+ */
+
+[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * 1. Correct the inability to style clickable types in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in Edge, IE 10+, and Firefox.
+ */
+
+details {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Misc
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10+.
+ */
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diff --git a/site/public/register-docs/index.html b/site/public/register-docs/index.html
new file mode 100644
index 0000000..fdc5237
--- /dev/null
+++ b/site/public/register-docs/index.html
@@ -0,0 +1,168 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Register | Gradecoin </title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
+
+    <link href="https://fonts.googleapis.com/css?family=Alfa+Slab+One&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Fira+Sans:400,500,600&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/normalize.css">
+    <link rel="stylesheet" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;juice.css">
+    
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+
+</head>
+
+<body>
+    
+<header class="box-shadow">
+    
+
+<a href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;">
+    <div class="logo">
+        <img src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png" alt="logo">
+        Gradecoin
+    </div>
+</a>
+
+<nav>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;register-docs&#x2F;">Register</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;jwt&#x2F;">JWT</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;transaction-docs&#x2F;">Transactions</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;block-docs&#x2F;">Blocks</a>
+    
+    
+        
+        <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;github.com&#x2F;zhuowei&#x2F;nft_ptr#why">why?</a>
+        
+    
+</nav>
+
+</header>
+
+
+    <main>
+        
+        
+        
+        
+        
+        <div class="toc">
+            <div class="toc-sticky">
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/register-docs/#authentication-process">Authentication Process</a>
+                </div>
+                
+                
+            </div>
+        </div>
+        
+        
+
+        <div class="content text">
+            
+<div class="heading-text">Register Documentation</div>
+<p>POST request to /register endpoint</p>
+<p>Lets a user to authenticate themselves to the system.
+Only people who are enrolled to the class can open Gradecoin accounts.
+This is enforced with your Student ID and a one time password you will receive.</p>
+<h1 id="authentication-process">Authentication Process</h1>
+<ul>
+<li>Gradecoin's Public Key (<code>gradecoin_public_key</code>) is listed on our Moodle page.</li>
+<li>You pick a short temporary key (<code>k_temp</code>)</li>
+<li>Create a JSON object (<code>auth_plaintext</code>) with your <code>metu_id</code> and <code>public key</code> in base64 (PEM) format (<code>S_PK</code>) <a href="https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem">reference</a></li>
+</ul>
+<pre style="background-color:#ffffff;">
+<code class="language-json" data-lang="json"><span style="color:#545052;">{
+    &quot;</span><span style="color:#009854;">student_id</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">e12345</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">passwd</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">15 char secret</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">public_key</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">---BEGIN PUBLIC KEY...</span><span style="color:#545052;">&quot;
+}
+</span></code></pre>
+<ul>
+<li>Pick a random IV.</li>
+<li>Encrypt the serialized string of <code>auth_plaintext</code> with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (<code>k_temp</code>), the result is <code>auth_ciphertext</code>. Encode this with base64.</li>
+<li>The temporary key you have picked <code>k_temp</code> is encrypted using RSA with OAEP padding scheme
+using SHA-256 with <code>gradecoin_public_key</code>, giving us <code>key_ciphertext</code>. Encode this with base 64.</li>
+<li>The payload JSON object (<code>auth_request</code>) can be serialized now:</li>
+</ul>
+<pre style="background-color:#ffffff;">
+<code class="language-json" data-lang="json"><span style="color:#545052;">{
+    &quot;</span><span style="color:#009854;">c</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">auth_ciphertext</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">iv</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">hexadecimal</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">key</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">key_ciphertext</span><span style="color:#545052;">&quot;
+}
+</span></code></pre>
+<p>If your authentication process was valid, you will be given access and your public key fingerprint that is your address.</p>
+
+
+        </div>
+
+        
+        
+    </main>
+
+    
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+
+</body>
+<script>
+    function highlightNav(heading) {
+        let pathname = location.pathname;
+        document.querySelectorAll(".toc a").forEach((item) => {
+            item.classList.remove("active");
+        });
+        document.querySelector(".toc a[href$='" + pathname + "#" + heading + "']").classList.add("active");
+    }
+
+    let currentHeading = "";
+    window.onscroll = function () {
+        let h = document.querySelectorAll("h1,h2,h3,h4,h5,h6");
+        let elementArr = [];
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+            if (item.id !== "") {
+                elementArr[item.id] = item.getBoundingClientRect().top;
+            }
+        });
+        elementArr.sort();
+        for (let key in elementArr) {
+            if (!elementArr.hasOwnProperty(key)) {
+                continue;
+            }
+            if (elementArr[key] > 0 && elementArr[key] < 300) {
+                if (currentHeading !== key) {
+                    highlightNav(key);
+                    currentHeading = key;
+                }
+                break;
+            }
+        }
+    }
+</script>
+
+</html>
diff --git a/site/public/robots.txt b/site/public/robots.txt
new file mode 100644
index 0000000..7b7f367
--- /dev/null
+++ b/site/public/robots.txt
@@ -0,0 +1,3 @@
+User-agent: *
+Allow: /
+Sitemap: https://gradecoin.xyz/sitemap.xml
diff --git a/site/public/search_index.en.js b/site/public/search_index.en.js
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Gradecoin is the faux currency we will use to simulate a blockchain network. At the end of the simulation, the amount of Gradecoin you hold will be your PA1 grade.\nA quick summary: authenticate yourself to the system using public key encryption.\nCraft Transaction proposals and tag them using JWTs.\nWhen there are enough transactions then you can propose Blocks in the same way.\nBlocks need to be mined beforehand using Proof-of-work, or brute force.\nGradecoin offers 3 endpoints at /register, /block and /transaction. You can only send GET requests to /block and /transaction without authorization.\nThe server is programmed in RESTful architecture, there are no DELETE, PUT or UPDATE operations, though.\nGradecoin uses a Proof-of-work block accepting mechanism. It uses single round Blake2s hashing which produces 256-bit (64 hexadecimal characters) output. The target hash is 24 bits or 6 hexadecimal characters of 0. During testing, I could mine a block on average around 2-7 minutes.\n\nWe're expecting you to use existing tools and implementations. Standards are hard. Don't roll your own crypto. Feel free to ask questions. Collaborate.\n\nYou might ask,\n\nBut if nobody has any Gradecoin then how do we have transactions?\n\nThere is a bank! Their public key is 31415926535897932384626433832795028841971693993751058209749445923 and they have some amount of Gradecoin preloaded. It's also the only account that you can send transactions requests to yourself.\nCoinbase\nThe first transactions of a block is called the coinbase. They are the author of the block proposal and if the block is accepted then they get compensated for their efforts with some Gradecoin.\nPublic Key Signatures\nGradecoin uses 2048 bit RSA keyspairs.\nServices\n/register\n\nStudent creates their own 2048 bit RSA keypair\nDownloads Gradecoin's Public Key from Moodle\nEncrypts their JSON wrapped Public Key, Student ID and one time passwd using Gradecoin's Public Key\nTheir public key is now in our database and can be used to sign their JWT's during requests\n\n/transaction\n\nYou can offer a Transaction - POST request\n\nThe request should have Authorization\nThe request header should be signed by the Public Key of the by field in the transaction\n\n\nfetch the list of Transactions - GET request\n\n/block\n\noffer a [schema::Block] - POST request\n\nThe request should have Authorization\nThe [schema::Block::transaction_list] of the block should be a subset of [schema::Db::pending_transactions]\n\n\nfetch the last accepted [schema::Block] - GET request\n\nAuthorization: The request header should have Bearer JWT.Token signed with Student Public Key\nQuestions\nThis all sound complicated!\n\nI've drawn inspiration from actual Bitcoin transactions and warp. The simplicity of the system is how little interfaces it has.\nDon't know where to start? Gradecoin uses RESTful API; simple curl commands or even your browser will work! This website can help as well.\nJWT Debugger and the corresponding RFC\nRemember that you are absolutely encouraged to grab off-the-shelf implementations for every cryptography primitive you will use. You can start by finding a code snippet to generate a RSA keypair?\n\nI found a bug!\nThank you! Please let me know so we can solve it.\nI hacked the server!\nThat wasn't supposed to happen :( I did not place any intentional vulnerabilities to the system so if you cracked something, it was not intended. Please don't abuse it and let me know so I can patch it.\nSubmission?\nAt the end of the simulation, your Gradecoin balance will be your grade. I will also expect a unique client programmed in either;\n\nc\nc++\nperl\nrust\npython\nrandom assortment of bash scripts\n\nIf your favourite programming language is missing please let me know 🤷?\nCan my friends play?\nSadly, no. Student's who are enrolled to the class will receive one-time-passwords for authentication.\nHow and or Why?\n\nBuilt, with Rust\n\n","id":"https://gradecoin.xyz/","title":"Gradecoin"},"https://gradecoin.xyz/block-docs/":{"body":"A block that was proposed to commit Transactions in transaction_list to the\nledger with a nonce that made hash valid; 6 zeroes at the left hand side of the\nhash (24 bytes).\nWe are mining using blake2s algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.\nRequests\nGET\nA HTTP GET request to /block endpoint will return the latest mined block.\nPOST\nA HTTP POST request with Authorization using JWT will allow you to propose your own blocks.\nFields\ntransaction_list: [array of Fingerprints]\nnonce: unsigned 32-bit integer\ntimestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;\nhash: String\n\nISO 8601 Reference\n","id":"https://gradecoin.xyz/block-docs/","title":"Blocks"},"https://gradecoin.xyz/jwt/":{"body":"\nJSON Web Tokens are representations of claims, or authorization proofs that fit into the Header of HTTP requests.\n\nHow?\nJWTs are used as the MAC of operations that require authorization:\n\nblock proposal\ntransaction proposal.\n\nThey are send alongside the JSON request body in the Header;\nAuthorization: Bearer aaaaaa.bbbbbb.ccccc\n\nGradecoin uses 3 fields for the JWTs;\n{\n\"tha\": \"Hash of the payload, check invididual references\",\n\"iat\": \"Issued At, Unix Time\",\n\"exp\": \"Expiration Time, epoch\"\n}\n\n\ntha is explained in blocks and transactions documentations.\niat when the JWT was created in Unix Time format\nexp when the JWT will expire &amp; be rejected in Unix Time\n\nAlgorithm\nWe are using RS256, RSASSA-PKCS1-v1_5 using SHA-256. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works here.\nReferences\n\nRFC, the ultimate reference\nJWT Debugger\n\n","id":"https://gradecoin.xyz/jwt/","title":"JWT"},"https://gradecoin.xyz/register-docs/":{"body":"POST request to /register endpoint\nLets a user to authenticate themselves to the system.\nOnly people who are enrolled to the class can open Gradecoin accounts.\nThis is enforced with your Student ID and a one time password you will receive.\nAuthentication Process\n\nGradecoin's Public Key (gradecoin_public_key) is listed on our Moodle page.\nYou pick a short temporary key (k_temp)\nCreate a JSON object (auth_plaintext) with your metu_id and public key in base64 (PEM) format (S_PK) reference\n\n{\n    \"student_id\": \"e12345\",\n    \"passwd\": \"15 char secret\",\n    \"public_key\": \"---BEGIN PUBLIC KEY...\"\n}\n\n\nPick a random IV.\nEncrypt the serialized string of auth_plaintext with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (k_temp), the result is auth_ciphertext. Encode this with base64.\nThe temporary key you have picked k_temp is encrypted using RSA with OAEP padding scheme\nusing SHA-256 with gradecoin_public_key, giving us key_ciphertext. Encode this with base 64.\nThe payload JSON object (auth_request) can be serialized now:\n\n{\n    \"c\": \"auth_ciphertext\",\n    \"iv\": \"hexadecimal\",\n    \"key\": \"key_ciphertext\"\n}\n\nIf your authentication process was valid, you will be given access and your public key fingerprint that is your address.\n","id":"https://gradecoin.xyz/register-docs/","title":"Register"},"https://gradecoin.xyz/transaction-docs/":{"body":"A transaction request between source and target to move amount Gradecoin.\nRequests\nGET\nA HTTP GET request to /transaction endpoint will return the current list of pending transactions.\nPOST\nA HTTP POST request with Authorization using JWT to /transaction will allow you to propose your own transactions.\nFields\nby: Fingerprint\nsource: Fingerprint\ntarget: Fingerprint\namount: unsigned 16 bit integer\ntimestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;\n","id":"https://gradecoin.xyz/transaction-docs/","title":"Transactions"}},"docInfo":{"https://gradecoin.xyz/":{"body":371,"title":1},"https://gradecoin.xyz/block-docs/":{"body":74,"title":1},"https://gradecoin.xyz/jwt/":{"body":96,"title":1},"https://gradecoin.xyz/register-docs/":{"body":121,"title":1},"https://gradecoin.xyz/transaction-docs/":{"body":44,"title":1}},"length":5},"lang":"English"};
\ No newline at end of file
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+++ b/site/public/sitemap.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <url>
+        <loc>https://gradecoin.xyz/</loc>
+    </url>
+    <url>
+        <loc>https://gradecoin.xyz/block-docs/</loc>
+    </url>
+    <url>
+        <loc>https://gradecoin.xyz/jwt/</loc>
+    </url>
+    <url>
+        <loc>https://gradecoin.xyz/register-docs/</loc>
+    </url>
+    <url>
+        <loc>https://gradecoin.xyz/transaction-docs/</loc>
+    </url>
+</urlset>
diff --git a/site/public/transaction-docs/index.html b/site/public/transaction-docs/index.html
new file mode 100644
index 0000000..67b9505
--- /dev/null
+++ b/site/public/transaction-docs/index.html
@@ -0,0 +1,164 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Transactions | Gradecoin </title>
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
+
+    <link href="https://fonts.googleapis.com/css?family=Alfa+Slab+One&display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Fira+Sans:400,500,600&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/normalize.css">
+    <link rel="stylesheet" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;juice.css">
+    
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+
+</head>
+
+<body>
+    
+<header class="box-shadow">
+    
+
+<a href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;">
+    <div class="logo">
+        <img src="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;gradecoin.png" alt="logo">
+        Gradecoin
+    </div>
+</a>
+
+<nav>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;register-docs&#x2F;">Register</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;jwt&#x2F;">JWT</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;transaction-docs&#x2F;">Transactions</a>
+    
+    <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;gradecoin.xyz&#x2F;block-docs&#x2F;">Blocks</a>
+    
+    
+        
+        <a class="nav-item subtitle-text" href="https:&#x2F;&#x2F;github.com&#x2F;zhuowei&#x2F;nft_ptr#why">why?</a>
+        
+    
+</nav>
+
+</header>
+
+
+    <main>
+        
+        
+        
+        
+        
+        <div class="toc">
+            <div class="toc-sticky">
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/transaction-docs/#requests">Requests</a>
+                </div>
+                
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/transaction-docs/#get"><small>- GET</small></a>
+                </div>
+                
+                <div class="toc-item-child">
+                    <a class="subtext" href="https://gradecoin.xyz/transaction-docs/#post"><small>- POST</small></a>
+                </div>
+                
+                
+                
+                <div class="toc-item">
+                    <a class="subtext" href="https://gradecoin.xyz/transaction-docs/#fields">Fields</a>
+                </div>
+                
+                
+            </div>
+        </div>
+        
+        
+
+        <div class="content text">
+            
+<div class="heading-text">Transaction documentation</div>
+<p>A transaction request between <code>source</code> and <code>target</code> to move <code>amount</code> Gradecoin.</p>
+<h1 id="requests">Requests</h1>
+<h2 id="get">GET</h2>
+<p>A HTTP <code>GET</code> request to <a href="/transaction">/transaction</a> endpoint will return the current list of pending transactions.</p>
+<h2 id="post">POST</h2>
+<p>A HTTP <code>POST</code> request with Authorization using JWT to <a href="/transactions">/transaction</a> will allow you to propose your own transactions.</p>
+<h1 id="fields">Fields</h1>
+<pre style="background-color:#ffffff;">
+<code><span style="color:#545052;">by: Fingerprint
+source: Fingerprint
+target: Fingerprint
+amount: unsigned 16 bit integer
+timestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;
+</span></code></pre>
+
+        </div>
+
+        
+        
+    </main>
+
+    
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+
+</body>
+<script>
+    function highlightNav(heading) {
+        let pathname = location.pathname;
+        document.querySelectorAll(".toc a").forEach((item) => {
+            item.classList.remove("active");
+        });
+        document.querySelector(".toc a[href$='" + pathname + "#" + heading + "']").classList.add("active");
+    }
+
+    let currentHeading = "";
+    window.onscroll = function () {
+        let h = document.querySelectorAll("h1,h2,h3,h4,h5,h6");
+        let elementArr = [];
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+        for (let key in elementArr) {
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+                continue;
+            }
+            if (elementArr[key] > 0 && elementArr[key] < 300) {
+                if (currentHeading !== key) {
+                    highlightNav(key);
+                    currentHeading = key;
+                }
+                break;
+            }
+        }
+    }
+</script>
+
+</html>
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new file mode 100644
index 0000000..3fd05b4
--- /dev/null
+++ b/site/templates/_variables.html
@@ -0,0 +1,15 @@
+<style>
+    :root {
+        /* Primary theme color */
+        --primary-color: #F8D12F;
+        /* Primary theme text color */
+        --primary-text-color: #1E2329;
+        /* Primary theme link color */
+        --primary-link-color: #2F57F7;
+        /* Secondary color: the background body color */
+        --secondary-color: #FAFAFA;
+        --secondary-text-color: #303030;
+        /* Highlight text color of table of content */
+        --toc-highlight-text-color: #d46e13;
+    }
+</style>
diff --git a/site/templates/index.html b/site/templates/index.html
new file mode 100644
index 0000000..1256b2a
--- /dev/null
+++ b/site/templates/index.html
@@ -0,0 +1,50 @@
+{% extends "juice/templates/index.html" %}
+
+{% block head %}
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />
+{% endblock head %}
+
+{% block hero %}
+<section class="text-center">
+    <h1 class="heading-text animate__animated animate__jackInTheBox" style="font-size: 50px">
+        Mine your own grades
+    </h1>
+    <h3 class="title-text">
+        <b>Gradecoin</b> is the latest cutting edge blockchain technology agile grading framework that drives organic engagement and other buzzwords, with big data mining search engine optimization
+    </h3>
+    <div>
+    </div>
+</section>
+<img class="hero-image" style="width: 40%" src="{{ get_url(path="gradecoin.png") }}">
+
+<div class="explore-more text"
+     onclick="document.getElementById('features').scrollIntoView({behavior: 'smooth'})">
+    ⇩ Learn How ⇩
+</div>
+<style>
+
+.hero section {
+    padding: 0 5rem;
+}
+
+@media screen and (max-width: 768px) {
+    .hero section {
+        padding: 0 2rem;
+    }
+
+    .hero-image {
+        display: none
+    }
+
+}
+footer {
+    color: #8b8b8b;
+}
+</style>
+{% endblock hero %}
+
+{% block footer %}
+<footer>
+Built For ⁂ CENG489 ⁂ Introduction to Computer Security
+</footer>
+{% endblock footer %}
diff --git a/site/themes/juice b/site/themes/juice
new file mode 160000
+Subproject 07310323f85e7851c0a1498021b0a02cfb2e215