Add "About this site" section

diff --git a/index.html b/index.html
index 186d996f2f34f9e7302271a9d03a7b8a86a44807..2d7a4d4c6a2954fdc5777cf62e7baf8ccb338bd8 100644 (file)
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+++ b/index.html
@@ -75,15 +75,24 @@
 <body>
   <header>
     <h1>ens2hex</h1>
-    <a href="https://github.com/ardislu/ens2hex">
-      <svg role="img" aria-labelledby="github" width="24" height="24" viewBox="0 0 24 24">
-        <title id="github">GitHub repository</title>
-        <path d="M12 2A10 10 0 0 0 2 12c0 4.42 2.87 8.17 6.84 9.5c.5.08.66-.23.66-.5v-1.69c-2.77.6-3.36-1.34-3.36-1.34c-.46-1.16-1.11-1.47-1.11-1.47c-.91-.62.07-.6.07-.6c1 .07 1.53 1.03 1.53 1.03c.87 1.52 2.34 1.07 2.91.83c.09-.65.35-1.09.63-1.34c-2.22-.25-4.55-1.11-4.55-4.92c0-1.11.38-2 1.03-2.71c-.1-.25-.45-1.29.1-2.64c0 0 .84-.27 2.75 1.02c.79-.22 1.65-.33 2.5-.33c.85 0 1.71.11 2.5.33c1.91-1.29 2.75-1.02 2.75-1.02c.55 1.35.2 2.39.1 2.64c.65.71 1.03 1.6 1.03 2.71c0 3.82-2.34 4.66-4.57 4.91c.36.31.69.92.69 1.85V21c0 .27.16.59.67.5C19.14 20.16 22 16.42 22 12A10 10 0 0 0 12 2z" />
-      </svg>
-    </a>
   </header>
 
   <main>
+    <section>
+      <h1>About this site</h1>
+      <details>
+        <summary>What is this?</summary>
+        <p>This is a tool to get the <a href="https://ethereum.org">Ethereum</a> hexadecimal (<code>0x</code>) address for every <abbr title="Ethereum Name Service">ENS</abbr> (<code>.eth</code>) name in a list.</p>
+      </details>
+      <details>
+        <summary>How does it work?</summary>
+        <p>This tool generates a <a href="https://ethereum.org/en/developers/docs/apis/json-rpc/">JSON-RPC</a> payload to bulk query the <a href="https://etherscan.io/address/0x4976fb03c32e5b8cfe2b6ccb31c09ba78ebaba41">ENS PublicResolver</a> smart contract, which returns the hexadecimal addresses.
+        <p>The <code>keccak256</code> implementation was taken from Deno (original code <a href="https://github.com/denoland/deno_std/tree/main/hash">here</a>).</p>
+        <p>There are no dependencies other than the <code>keccak256</code> implementation. The rest of the tool consists of about 80 lines of vanilla JavaScript.</p>
+        <p><a href="https://github.com/ardislu/ens2hex">Click here</a> to view the source code on GitHub.</p>
+      </details>
+    </section>
+
     <form>
       <label for="text">Copy a list of names here:</label>
       <textarea id="text" name="text" rows="10"></textarea>