cross-chain/demo.html at main · Yourmix0x/cross-chain · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Ethereum ↔ Osmosis Cross-Chain Bridge — Live Demo</title>
  <meta name="description" content="Live proof-of-concept demo of a lock-and-mint token bridge between Ethereum Sepolia and Osmosis testnet." />
  <link rel="preconnect" href="https://fonts.googleapis.com" />
  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet" />
  <style>
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

    :root {
      --bg: #0a0e1a;
      --surface: rgba(255, 255, 255, 0.04);
      --surface-hover: rgba(255, 255, 255, 0.07);
      --border: rgba(255, 255, 255, 0.08);
      --text: #e2e8f0;
      --text-dim: #8892a6;
      --accent-eth: #627eea;
      --accent-eth-glow: rgba(98, 126, 234, 0.25);
      --accent-osmo: #a855f7;
      --accent-osmo-glow: rgba(168, 85, 247, 0.25);
      --accent-green: #22c55e;
      --accent-green-glow: rgba(34, 197, 94, 0.15);
      --radius: 16px;
      --mono: 'JetBrains Mono', monospace;
      --sans: 'Inter', system-ui, sans-serif;
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    html { scroll-behavior: smooth; }

    body {
      font-family: var(--sans);
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      width: 100%;
      overflow-x: hidden;
      line-height: 1.6;
    }

    body::before {
      content: '';
      position: fixed;
      top: -40%; left: -20%;
      width: 80vw; height: 80vw;
      background: radial-gradient(circle, var(--accent-eth-glow) 0%, transparent 60%);
      pointer-events: none; z-index: 0;
    }
    body::after {
      content: '';
      position: fixed;
      bottom: -40%; right: -20%;
      width: 80vw; height: 80vw;
      background: radial-gradient(circle, var(--accent-osmo-glow) 0%, transparent 60%);
      pointer-events: none; z-index: 0;
    }

    .page {
      position: relative; z-index: 1;
      max-width: 1120px;
      margin: 0 auto;
      padding: 40px 24px 60px;
    }

    /* Header */
    header { text-align: center; margin-bottom: 48px; }
    header .badge {
      display: inline-flex; align-items: center; gap: 6px;
      background: var(--accent-green-glow);
      border: 1px solid rgba(34, 197, 94, 0.3);
      color: var(--accent-green);
      font-size: 12px; font-weight: 600;
      letter-spacing: 0.5px; text-transform: uppercase;
      padding: 5px 14px; border-radius: 100px; margin-bottom: 20px;
    }
    header .badge .dot {
      width: 7px; height: 7px; border-radius: 50%;
      background: var(--accent-green);
      animation: pulse 2s ease-in-out infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.8); }
    }
    header h1 {
      font-size: clamp(28px, 4.5vw, 44px); font-weight: 800; letter-spacing: -1px;
      background: linear-gradient(135deg, var(--accent-eth) 0%, var(--accent-osmo) 100%);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
      background-clip: text; margin-bottom: 12px;
    }
    header p { color: var(--text-dim); font-size: 15px; max-width: 600px; margin: 0 auto; }
    header .networks {
      display: flex; justify-content: center; gap: 24px;
      margin-top: 20px; font-size: 13px; font-weight: 500;
    }
    header .networks span { display: flex; align-items: center; gap: 6px; color: var(--text-dim); }
    header .networks .chain-dot { width: 8px; height: 8px; border-radius: 50%; }
    header .networks .chain-dot.eth { background: var(--accent-eth); }
    header .networks .chain-dot.osmo { background: var(--accent-osmo); }

    /* Cards */
    .card {
      background: var(--surface); backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border); border-radius: var(--radius);
      padding: 28px; margin-bottom: 24px; transition: background 0.2s;
    }
    .card:hover { background: var(--surface-hover); }
    .card-title {
      font-size: 13px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 1.2px; color: var(--text-dim); margin-bottom: 18px;
    }

    /* Flow diagram */
    .flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: center; }
    .flow-chain {
      text-align: center; padding: 24px 16px; border-radius: 14px;
      border: 1px solid var(--border); background: var(--surface);
    }
    .flow-chain .chain-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
    .flow-chain .chain-sub { font-size: 12px; color: var(--text-dim); font-family: var(--mono); }
    .flow-chain.eth { border-color: rgba(98, 126, 234, 0.25); }
    .flow-chain.eth .chain-name { color: var(--accent-eth); }
    .flow-chain.osmo { border-color: rgba(168, 85, 247, 0.25); }
    .flow-chain.osmo .chain-name { color: var(--accent-osmo); }
    .flow-arrows { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 0 12px; }
    .flow-arrows .arrow {
      display: flex; align-items: center; gap: 6px;
      font-size: 11px; font-weight: 600; letter-spacing: 0.5px; white-space: nowrap;
    }
    .arrow-line { width: 48px; height: 2px; border-radius: 2px; }
    .arrow.fwd .arrow-line { background: linear-gradient(90deg, var(--accent-eth), var(--accent-osmo)); }
    .arrow.rev .arrow-line { background: linear-gradient(90deg, var(--accent-osmo), var(--accent-eth)); }
    .arrow.fwd { color: var(--accent-osmo); }
    .arrow.rev { color: var(--accent-eth); }
    .flow-icon { font-size: 28px; line-height: 1; }

    /* Contracts grid */
    .contracts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
    .contract-item {
      padding: 18px; border-radius: 12px;
      border: 1px solid var(--border); background: var(--surface);
    }
    .contract-item .label {
      font-size: 12px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.8px; color: var(--text-dim); margin-bottom: 8px;
    }
    .contract-item .addr { font-family: var(--mono); font-size: 12.5px; color: var(--text); word-break: break-all; }
    .contract-item a { color: var(--accent-eth); text-decoration: none; transition: color 0.15s; }
    .contract-item a:hover { color: #8fa4f0; text-decoration: underline; }
    .contract-item a.osmo-link { color: var(--accent-osmo); }
    .contract-item a.osmo-link:hover { color: #c084fc; }
    .contract-item .verified {
      display: inline-flex; align-items: center; gap: 4px;
      font-size: 11px; font-weight: 600; color: var(--accent-green); margin-top: 6px;
    }

    /* TX steps */
    .tx-section-title {
      font-size: 15px; font-weight: 700; margin-bottom: 16px;
      display: flex; align-items: center; gap: 8px;
    }
    .tx-section-title .tag {
      font-size: 11px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.5px; padding: 3px 10px; border-radius: 6px;
    }
    .tag.fwd { background: rgba(168, 85, 247, 0.15); color: var(--accent-osmo); border: 1px solid rgba(168, 85, 247, 0.25); }
    .tag.rev { background: rgba(98, 126, 234, 0.15); color: var(--accent-eth); border: 1px solid rgba(98, 126, 234, 0.25); }

    .steps { display: flex; flex-direction: column; gap: 0; }
    .step { display: grid; grid-template-columns: 36px 1fr; gap: 14px; }
    .step-indicator { display: flex; flex-direction: column; align-items: center; }
    .step-num {
      width: 28px; height: 28px; border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      font-size: 12px; font-weight: 700; flex-shrink: 0;
    }
    .step.eth-step .step-num { background: rgba(98, 126, 234, 0.2); color: var(--accent-eth); border: 1px solid rgba(98, 126, 234, 0.35); }
    .step.osmo-step .step-num { background: rgba(168, 85, 247, 0.2); color: var(--accent-osmo); border: 1px solid rgba(168, 85, 247, 0.35); }
    .step-line { width: 2px; flex: 1; background: var(--border); margin: 4px 0; }
    .step:last-child .step-line { display: none; }
    .step-body { padding-bottom: 20px; }
    .step:last-child .step-body { padding-bottom: 0; }
    .step-action { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
    .step-detail { font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
    .step-tx {
      display: inline-flex; align-items: center; gap: 5px;
      font-family: var(--mono); font-size: 11.5px;
      padding: 4px 10px; border-radius: 6px;
      background: rgba(255,255,255,0.04); border: 1px solid var(--border);
      text-decoration: none; color: var(--text); transition: all 0.15s;
    }
    .step-tx:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.15); }
    .step-tx .arrow-icon { font-size: 10px; color: var(--text-dim); }

    /* Balance table */
    .balance-table { width: 100%; border-collapse: collapse; font-size: 14px; }
    .balance-table th {
      text-align: left; font-size: 11px; font-weight: 600;
      text-transform: uppercase; letter-spacing: 0.8px;
      color: var(--text-dim); padding: 10px 14px; border-bottom: 1px solid var(--border);
    }
    .balance-table td {
      padding: 12px 14px; border-bottom: 1px solid rgba(255,255,255,0.03);
      font-family: var(--mono); font-size: 13px;
    }
    .balance-table tr:last-child td { border-bottom: none; }
    .balance-table .stage { font-family: var(--sans); font-weight: 600; color: var(--text); }
    .balance-table .num { text-align: right; }
    .balance-table .match { color: var(--accent-green); font-weight: 500; }

    .invariant {
      display: flex; align-items: center; gap: 8px;
      margin-top: 14px; padding: 12px 16px; border-radius: 10px;
      background: var(--accent-green-glow); border: 1px solid rgba(34, 197, 94, 0.2);
      font-size: 13px; font-weight: 600; color: var(--accent-green);
    }

    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

    footer {
      text-align: center; padding-top: 24px;
      font-size: 12px; color: var(--text-dim);
    }
    footer a { color: var(--accent-eth); text-decoration: none; }
    footer a:hover { text-decoration: underline; }

    @media (max-width: 768px) {
      .flow { grid-template-columns: 1fr; gap: 12px; }
      .flow-arrows { flex-direction: row; padding: 8px 0; }
      .arrow-line { width: 24px; }
      .two-col { grid-template-columns: 1fr; }
      .contracts-grid { grid-template-columns: 1fr; }
      .page { padding: 24px 16px 40px; }
    }
  </style>
</head>
<body>
  <div class="page">

    <header>
      <div class="badge"><span class="dot"></span> Verified on live testnets</div>
      <h1>Ethereum ↔ Osmosis<br/>Cross-Chain Token Bridge</h1>
      <p>Lock-and-mint bridge POC — a full bidirectional round-trip executed on live testnets with source-verified contracts.</p>
      <div class="networks">
        <span><span class="chain-dot eth"></span> Ethereum Sepolia (11155111)</span>
        <span><span class="chain-dot osmo"></span> Osmosis Testnet (osmo-test-5)</span>
      </div>
    </header>

    <!-- Architecture -->
    <div class="card">
      <div class="card-title">Bridge Architecture</div>
      <div class="flow">
        <div class="flow-chain eth">
          <div class="flow-icon">⟠</div>
          <div class="chain-name">Ethereum Sepolia</div>
          <div class="chain-sub">TestToken (ERC-20) + BridgeLock</div>
        </div>
        <div class="flow-arrows">
          <div class="arrow fwd">lock → <span class="arrow-line"></span> → mint</div>
          <div style="font-size:11px;color:var(--text-dim)">off-chain relayer</div>
          <div class="arrow rev">unlock ← <span class="arrow-line"></span> ← burn</div>
        </div>
        <div class="flow-chain osmo">
          <div class="flow-icon">⚛</div>
          <div class="chain-name">Osmosis Testnet</div>
          <div class="chain-sub">Token Factory — wbridge (wTT)</div>
        </div>
      </div>
    </div>

    <!-- Deployed Contracts -->
    <div class="card">
      <div class="card-title">Deployed Contracts &amp; Assets</div>
      <div class="contracts-grid">
        <div class="contract-item">
          <div class="label">TestToken (ERC-20)</div>
          <div class="addr">
            <a href="https://sepolia.etherscan.io/address/0x5d42ee571fdb4eaaf732118b6f137a457ad0674a#code" target="_blank" rel="noopener">0x5d42ee571fdb4eaaf732118b6f137a457ad0674a</a>
          </div>
          <div class="verified">✓ Source Verified on Etherscan</div>
        </div>
        <div class="contract-item">
          <div class="label">BridgeLock (Escrow)</div>
          <div class="addr">
            <a href="https://sepolia.etherscan.io/address/0xaf50c0c0487456b108fbb5aba0f3a3b3cd165bde#code" target="_blank" rel="noopener">0xaf50c0c0487456b108fbb5aba0f3a3b3cd165bde</a>
          </div>
          <div class="verified">✓ Source Verified on Etherscan</div>
        </div>
        <div class="contract-item">
          <div class="label">Wrapped Token (Osmosis Token Factory)</div>
          <div class="addr" style="font-size:11.5px;">
            <span style="color:var(--accent-osmo);">factory/</span>osmo1zccwu68e76tnsrn230lh0ghsx0qv2v8x2h95lc<span style="color:var(--accent-osmo);">/wbridge</span>
          </div>
        </div>
        <div class="contract-item">
          <div class="label">Authorized Relayer (unlock signer)</div>
          <div class="addr">
            <a href="https://sepolia.etherscan.io/address/0xD39d24Ce7aA839EB855d5219F28612D5Ac76D469" target="_blank" rel="noopener">0xD39d24Ce7aA839EB855d5219F28612D5Ac76D469</a>
          </div>
        </div>
      </div>
    </div>

    <!-- Transaction Flow -->
    <div class="two-col">
      <div class="card">
        <div class="tx-section-title">
          <span class="tag fwd">Forward</span> Lock 25 TT → Mint 25 wTT
        </div>
        <div class="steps">
          <div class="step eth-step">
            <div class="step-indicator"><div class="step-num">1</div><div class="step-line"></div></div>
            <div class="step-body">
              <div class="step-action">approve(BridgeLock, 25)</div>
              <div class="step-detail">User approves escrow contract to spend 25 TT</div>
              <a class="step-tx" href="https://sepolia.etherscan.io/tx/0xc4367460cb836dd2ecd54a397a4c99954f12829aab357a7028711f456be28c34" target="_blank" rel="noopener">0xc436…8c34 <span class="arrow-icon">↗</span></a>
            </div>
          </div>
          <div class="step eth-step">
            <div class="step-indicator"><div class="step-num">2</div><div class="step-line"></div></div>
            <div class="step-body">
              <div class="step-action">lock(25, "osmo1zcc…95lc")</div>
              <div class="step-detail">Tokens escrowed in BridgeLock. Emits Locked event (nonce 0).</div>
              <a class="step-tx" href="https://sepolia.etherscan.io/tx/0xe1ae35aadb59f41a1468cf762bf201c9e4e3d7db652a999ea1c9f1e80d98d440" target="_blank" rel="noopener">0xe1ae…d440 <span class="arrow-icon">↗</span></a>
            </div>
          </div>
          <div class="step osmo-step">
            <div class="step-indicator"><div class="step-num">3</div></div>
            <div class="step-body">
              <div class="step-action">MsgMint 25 wTT → recipient</div>
              <div class="step-detail">Relayer detects Locked event, mints wrapped tokens on Osmosis.</div>
              <a class="step-tx" href="https://www.mintscan.io/osmosis-testnet/tx/FDEC749B7675715D04EE7D5C61F64B9A26216DD171E2B3A10DDCDC18B09867F8" target="_blank" rel="noopener">FDEC74…67F8 <span class="arrow-icon">↗</span></a>
            </div>
          </div>
        </div>
      </div>

      <div class="card">
        <div class="tx-section-title">
          <span class="tag rev">Reverse</span> Return 10 wTT → Unlock 10 TT
        </div>
        <div class="steps">
          <div class="step osmo-step">
            <div class="step-indicator"><div class="step-num">4</div><div class="step-line"></div></div>
            <div class="step-body">
              <div class="step-action">MsgSend 10 wTT → relayer</div>
              <div class="step-detail">User sends wrapped tokens to relayer. Memo = EVM recipient address.</div>
              <a class="step-tx" href="https://www.mintscan.io/osmosis-testnet/tx/2A3980D7FF07C76B93C5D1E875D20224B1A923CEBF762F0134115349B1BF2EF0" target="_blank" rel="noopener">2A3980…2EF0 <span class="arrow-icon">↗</span></a>
            </div>
          </div>
          <div class="step osmo-step">
            <div class="step-indicator"><div class="step-num">5</div><div class="step-line"></div></div>
            <div class="step-body">
              <div class="step-action">MsgBurn 10 wTT</div>
              <div class="step-detail">Relayer burns the received wrapped tokens, reducing supply.</div>
              <a class="step-tx" href="https://www.mintscan.io/osmosis-testnet/tx/1EDA055AEB297282654483B2E9FDFE9DB20ACC9BC5FDCE68D8FC928014E72D34" target="_blank" rel="noopener">1EDA05…2D34 <span class="arrow-icon">↗</span></a>
            </div>
          </div>
          <div class="step eth-step">
            <div class="step-indicator"><div class="step-num">6</div></div>
            <div class="step-body">
              <div class="step-action">unlock(recipient, 10)</div>
              <div class="step-detail">Relayer releases 10 TT from escrow on Sepolia.</div>
              <a class="step-tx" href="https://sepolia.etherscan.io/tx/0xac58d451e9850e354ba1e220b2185c61ceab68b426da4c71e8597d7a4e197cdb" target="_blank" rel="noopener">0xac58…7cdb <span class="arrow-icon">↗</span></a>
            </div>
          </div>
        </div>
      </div>
    </div>

    <!-- Balance Reconciliation -->
    <div class="card">
      <div class="card-title">Balance Reconciliation</div>
      <table class="balance-table">
        <thead>
          <tr>
            <th>Stage</th>
            <th class="num">User TT (Sepolia)</th>
            <th class="num">BridgeLock Escrowed</th>
            <th class="num">wTT Supply (Osmosis)</th>
            <th class="num">Invariant</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td class="stage">Start</td>
            <td class="num">1,000,000</td>
            <td class="num">0</td>
            <td class="num">0</td>
            <td class="num match">0 = 0 ✓</td>
          </tr>
          <tr>
            <td class="stage">After Forward (lock 25)</td>
            <td class="num">999,975</td>
            <td class="num">25</td>
            <td class="num">25</td>
            <td class="num match">25 = 25 ✓</td>
          </tr>
          <tr>
            <td class="stage">After Reverse (return 10)</td>
            <td class="num">999,985</td>
            <td class="num">15</td>
            <td class="num">15</td>
            <td class="num match">15 = 15 ✓</td>
          </tr>
        </tbody>
      </table>
      <div class="invariant">✓ Invariant held throughout: escrowed TT == wTT supply</div>
    </div>

    <footer>
      Testnet POC · Single trusted relayer · Not production / not audited ·
      <a href="https://sepolia.etherscan.io/address/0x5d42ee571fdb4eaaf732118b6f137a457ad0674a#code" target="_blank" rel="noopener">Contracts verified on Etherscan</a>
    </footer>

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