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  <title>Super Testnet — your little Bitcoin universe</title>
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  <header><a class="brand" href="#"><span class="mark">S↗</span> SUPER TESTNET <span class="version">v0</span></a><span class="network"><i></i> PRIVATE LOCAL CHAIN</span></header>
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    <section class="hero"><div><p class="eyebrow">BITCOIN, WITH ROOM TO EXPERIMENT</p><h1>Your little<br>Bitcoin universe.</h1><p class="intro">Mine a block. Inscribe a thought. See it land in your wallet.<br>All in your browser, all with pretend money.</p></div><div class="orbit" aria-hidden="true"><div class="cube"><svg viewBox="0 0 100 100" width="82" height="82" fill="none" stroke="currentColor" stroke-width="5" aria-hidden="true"><path d="M35 17v12m12-12v12M35 76v12m12-12v12M24 29h25c22 0 22 23 0 23H24m0 0h28c22 0 22 24 0 24H24m7-47v47"/></svg></div><span>YOUR CHAIN. YOUR PACE.</span></div></section>
    <aside class="notice"><strong>Test coins only.</strong> This is a private simulation, not Bitcoin testnet or mainnet. Keys stay in this browser, unencrypted. Never load real keys or send real funds here.</aside>
    <div id="status" role="status" aria-live="polite">Create a test wallet to start your first loop.</div>
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      <article class="panel wallet"><div class="panel-title"><span class="step">01</span><h2>Your test wallet</h2><span id="wallet-state" class="tag">NOT CREATED</span></div>
        <div id="empty-wallet"><p>One wallet. A whole chain to play with.</p><button id="create-wallet" class="primary">Create test wallet <span>↗</span></button></div>
        <div id="active-wallet" hidden><p class="label">FAKE BTC BALANCE</p><div class="balance"><span id="balance">0</span><small>BTC</small></div><p id="reserved" class="muted"></p><label for="address">Local regtest-format address</label><input id="address" readonly><button id="export-wallet" class="quiet">↓ Save test wallet</button></div>
        <div class="wallet-footer"><label class="file-button" for="load-wallet">↑ Load test wallet or lab backup</label><input id="load-wallet" type="file" accept=".json,application/json"><p class="muted">Saved on this device. A wallet backup contains its test key; a lab backup also preserves the chain.</p></div>
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      <article class="panel"><div class="panel-title"><span class="step">02</span><h2>Make some blocks</h2></div><p>Skip the faucet queue. Every block gives you <strong>50 fake BTC</strong>, ready to use immediately.</p><div class="chain-stats"><div><span class="label">BLOCK HEIGHT</span><strong id="height">0</strong></div><div><span class="label">PENDING TXS</span><strong id="pending">0</strong></div></div><button id="mine" class="primary" disabled>Mine a block <span>+</span></button><p class="muted">Mining also confirms your pending inscriptions.</p></article>
      <article class="panel inscribe"><div class="panel-title"><span class="step">03</span><h2>Leave a little something</h2><span class="tag">TEXT INSCRIPTION</span></div><label for="payload">What will you put on your chain?</label><textarea id="payload" placeholder="Hello, little Bitcoin universe…" rows="3" disabled></textarea><div class="compose-footer"><span id="byte-count" class="muted">0 / 280 UTF-8 bytes</span><button id="review" disabled>Review inscription ↗</button></div>
        <div id="review-panel" hidden><h3>Review before signing</h3><pre id="review-text"></pre><p>Two transactions: commit + reveal. <strong>1,000 fake sats</strong> in fees; <strong>1,000 fake sats</strong> reserved in your collectible. It returns to your current wallet.</p><p class="muted">The next button signs both transactions locally with this test wallet and submits them to your private chain.</p><button id="sign" class="primary">Sign & inscribe</button> <button id="cancel-review" class="quiet">Cancel</button></div>
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    <section class="collection-section"><div class="section-title"><div><p class="eyebrow">04 / THE THINGS YOU MADE</p><h2>Your inscriptions <span id="collection-count">0</span></h2></div><span class="muted">Owned by this wallet</span></div><div id="collectibles" class="collectibles"><p class="empty">Your first inscription belongs here.<br><span>Fund your wallet, write some text, and make it yours.</span></p></div></section>
    <section class="explorer-section"><div class="section-title"><div><p class="eyebrow">FOLLOW THE TRAIL</p><h2>Chain explorer</h2></div><button id="export-lab" class="quiet">↓ Save complete lab</button></div><div id="blocks" class="blocks"></div><article id="inspector" class="panel" hidden tabindex="-1"></article></section>
    <details class="about"><summary>Under the hood & attribution</summary><p>Real serialized Bitcoin transactions, Schnorr signatures and Taproot commit/reveal scripts, on a deliberately simplified local UTXO chain. No proof of work, Bitcoin consensus, peer network, public broadcast, or production custody. Collectible outputs cannot be spent in v0.</p><p>Built from and inspired by <a href="https://github.com/supertestnet/testnet_generator">Supertestnet’s testnet_generator</a>, <a href="https://github.com/supertestnet/inscriptions-online">inscriptions-online</a>, and <a href="https://github.com/supertestnet/vanilla-js-browser-wallet">vanilla-js-browser-wallet</a>. <a href="https://github.com/supertestnet/node_faker">node_faker</a> was evaluated for future RPC compatibility.</p><p>Transaction library: <a href="https://github.com/cmdruid/tapscript">tapscript by Christopher Scott</a> (<a href="/licenses/tapscript.txt">CC-BY-1.0</a>). <a href="/licenses/supertestnet-CC0.txt">Supertestnet CC0 license</a> · <a href="/licenses/noble-curves.txt">noble-curves license</a> · <a href="/licenses/noble-hashes.txt">noble-hashes license</a>.</p></details>
    <footer><span>SMALL CHAIN. BIG POSSIBILITIES.</span><button id="reset" class="quiet danger">Reset local lab</button></footer>
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