defi-visualized/bonding-curve.html at main · expectfun/defi-visualized · 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>Bonding Curve Explorer</title>
  <style>
    * {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
      color: #e4e4e4;
      min-height: 100vh;
      margin: 0;
      padding: 20px;
    }
    h1 {
      text-align: center;
      color: #00d9ff;
      margin-bottom: 10px;
    }
    .subtitle {
      text-align: center;
      color: #888;
      margin-bottom: 30px;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .main-layout {
      display: grid;
      grid-template-columns: 300px 1fr;
      gap: 20px;
      align-items: start;
    }
    .sidebar {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    @media (max-width: 800px) {
      .main-layout {
        grid-template-columns: 1fr;
      }
    }
    .card {
      background: rgba(255, 255, 255, 0.05);
      border-radius: 16px;
      padding: 20px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .chart-card {
      display: flex;
      flex-direction: column;
    }
    .controls {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .control-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    label {
      font-size: 14px;
      color: #aaa;
    }
    input[type="range"] {
      width: 100%;
      height: 8px;
      border-radius: 4px;
      background: #333;
      outline: none;
      -webkit-appearance: none;
    }
    input[type="range"]::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: #00d9ff;
      cursor: pointer;
      box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
    }
    select {
      padding: 10px;
      border-radius: 8px;
      border: 1px solid #444;
      background: #2a2a3e;
      color: #e4e4e4;
      font-size: 14px;
      cursor: pointer;
    }
    .value-display {
      font-size: 18px;
      font-weight: bold;
      color: #00d9ff;
    }
    canvas {
      width: 100%;
      aspect-ratio: 1 / 1;
      max-height: 70vh;
      border-radius: 12px;
      background: rgba(0, 0, 0, 0.3);
    }
    .stats {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .stat {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px;
      background: rgba(0, 217, 255, 0.1);
      border-radius: 8px;
    }
    .stat-value {
      font-size: 18px;
      font-weight: bold;
      color: #00d9ff;
    }
    .stat-label {
      font-size: 13px;
      color: #888;
    }
    .formula {
      text-align: center;
      padding: 16px;
      background: rgba(0, 0, 0, 0.3);
      border-radius: 8px;
      font-family: 'Courier New', monospace;
      color: #ff9f43;
      font-size: 18px;
    }
    .marker-info {
      margin-top: 16px;
      padding: 12px;
      background: rgba(255, 159, 67, 0.1);
      border-radius: 8px;
      border-left: 3px solid #ff9f43;
    }
    .buy-sell {
      display: flex;
      gap: 8px;
      margin-top: 8px;
    }
    .buy-sell button {
      flex: 1;
      padding: 10px 16px;
      border: none;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.1s, opacity 0.1s;
    }
    .buy-sell button:hover {
      transform: scale(1.02);
    }
    .buy-sell button:active {
      transform: scale(0.98);
    }
    .buy-sell button:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none;
    }
    .btn-sell {
      background: linear-gradient(135deg, #ff6b6b, #ee5a5a);
      color: white;
    }
    .btn-buy {
      background: linear-gradient(135deg, #51cf66, #40c057);
      color: white;
    }
    .stat.reserve {
      background: rgba(255, 159, 67, 0.15);
    }
    .stat.reserve .stat-value {
      color: #ff9f43;
    }
  </style>
</head>
<body>
  <div class="container">
    <a href="index.html" style="color: #00d9ff; text-decoration: none; font-size: 18px; display: inline-block; margin-bottom: 8px;" title="Home">
      🏠
    </a>
    <h1>Bonding Curve Explorer</h1>
    <p class="subtitle">See how token price changes based on supply</p>

    <div class="main-layout">
      <div class="sidebar">
        <div class="card">
          <div class="formula" id="formula">Price = Supply²</div>
        </div>

        <div class="card">
          <div class="controls">
            <div class="control-group">
              <label>Curve Type</label>
              <select id="curveType">
                <option value="linear">Linear (x)</option>
                <option value="quadratic">Quadratic (x²)</option>
                <option value="cubic">Cubic (x³)</option>
                <option value="sqrt">Square Root (√x)</option>
                <option value="exponential">Exponential (eˣ)</option>
              </select>
            </div>
            <div class="control-group">
              <label>Current Supply: <span class="value-display" id="supplyValue">100</span></label>
              <input type="range" id="supply" min="1" max="200" value="100">
              <div class="buy-sell">
                <button class="btn-sell" id="sellBtn" onclick="sell()">Sell 10</button>
                <button class="btn-buy" id="buyBtn" onclick="buy()">Buy 10</button>
              </div>
            </div>
            <div class="control-group">
              <label>Curve Steepness: <span class="value-display" id="steepnessValue">1.0</span></label>
              <input type="range" id="steepness" min="0.1" max="3" step="0.1" value="1">
            </div>
          </div>
        </div>

        <div class="card">
          <div class="stats">
            <div class="stat">
              <div class="stat-label">Current Price</div>
              <div class="stat-value" id="currentPrice">—</div>
            </div>
            <div class="stat reserve">
              <div class="stat-label">Total Reserve</div>
              <div class="stat-value" id="totalReserve">—</div>
            </div>
            <div class="stat">
              <div class="stat-label">Market Cap</div>
              <div class="stat-value" id="marketCap">—</div>
            </div>
            <div class="stat">
              <div class="stat-label">Next Token Cost</div>
              <div class="stat-value" id="nextTokenCost">—</div>
            </div>
          </div>
        </div>
      </div>

      <div class="card chart-card">
        <canvas id="chart"></canvas>
        <div class="marker-info">
          <strong>Current Position:</strong> At supply of <span id="markerSupply">100</span> tokens,
          the price is <span id="markerPrice" style="color: #00d9ff; font-weight: bold;">—</span>
        </div>
      </div>
    </div>
  </div>

  <script>
    const canvas = document.getElementById('chart');
    const ctx = canvas.getContext('2d');

    // High DPI support
    function setupCanvas() {
      const rect = canvas.getBoundingClientRect();
      const dpr = window.devicePixelRatio || 1;
      canvas.width = rect.width * dpr;
      canvas.height = rect.height * dpr;
      ctx.scale(dpr, dpr);
      canvas.style.width = rect.width + 'px';
      canvas.style.height = rect.height + 'px';
    }

    const curveType = document.getElementById('curveType');
    const supplySlider = document.getElementById('supply');
    const steepnessSlider = document.getElementById('steepness');
    const supplyValue = document.getElementById('supplyValue');
    const steepnessValue = document.getElementById('steepnessValue');

    const MAX_SUPPLY = 200;

    function buy() {
      const newValue = Math.min(MAX_SUPPLY, parseInt(supplySlider.value) + 10);
      supplySlider.value = newValue;
      supplyValue.textContent = newValue;
      draw();
    }

    function sell() {
      const newValue = Math.max(1, parseInt(supplySlider.value) - 10);
      supplySlider.value = newValue;
      supplyValue.textContent = newValue;
      draw();
    }

    function calculateReserve(supply, type, steepness) {
      let reserve = 0;
      for (let i = 1; i <= supply; i++) {
        reserve += calculatePrice(i, type, steepness);
      }
      return reserve;
    }

    function calculatePrice(supply, type, steepness) {
      switch(type) {
        case 'linear':
          return steepness * supply;
        case 'quadratic':
          return steepness * Math.pow(supply, 2);
        case 'cubic':
          return steepness * Math.pow(supply, 3);
        case 'sqrt':
          return steepness * Math.sqrt(supply);
        case 'exponential':
          return steepness * (Math.exp(supply / 50) - 1);
        default:
          return steepness * supply;
      }
    }

    function formatNumber(n) {
      if (n >= 1000000) return (n / 1000000).toFixed(1) + 'M';
      if (n >= 1000) return (n / 1000).toFixed(1) + 'K';
      if (n >= 10) return n.toFixed(0);
      if (n >= 1) return n.toFixed(1);
      return n.toFixed(2);
    }

    function getMaxPrice(type) {
      // Max price at MAX_SUPPLY with steepness=1
      switch(type) {
        case 'linear':
          return MAX_SUPPLY; // 200
        case 'quadratic':
          return Math.pow(MAX_SUPPLY, 2); // 40000
        case 'cubic':
          return Math.pow(MAX_SUPPLY, 3); // 8000000
        case 'sqrt':
          return Math.sqrt(MAX_SUPPLY); // ~14.14
        case 'exponential':
          return Math.exp(MAX_SUPPLY / 50) - 1; // ~53.6
        default:
          return MAX_SUPPLY;
      }
    }

    function getFormula(type, steepness) {
      const k = steepness.toFixed(1);
      switch(type) {
        case 'linear':
          return `Price = ${k} × Supply`;
        case 'quadratic':
          return `Price = ${k} × Supply²`;
        case 'cubic':
          return `Price = ${k} × Supply³`;
        case 'sqrt':
          return `Price = ${k} × √Supply`;
        case 'exponential':
          return `Price = ${k} × (e^(Supply/50) − 1)`;
        default:
          return 'Price = f(Supply)';
      }
    }

    function draw() {
      setupCanvas();
      const rect = canvas.getBoundingClientRect();
      const width = rect.width;
      const height = rect.height;
      const padding = 50;

      const type = curveType.value;
      const supply = parseInt(supplySlider.value);
      const steepness = parseFloat(steepnessSlider.value);

      // Clear canvas
      ctx.fillStyle = 'rgba(0, 0, 0, 0.3)';
      ctx.fillRect(0, 0, width, height);

      // Y-axis scale based on curve type (reaches top at steepness=1)
      const maxPrice = getMaxPrice(type) * 1.1; // 10% padding

      // Draw grid lines
      ctx.strokeStyle = 'rgba(255, 255, 255, 0.1)';
      ctx.lineWidth = 1;
      for (let i = 0; i <= 5; i++) {
        const y = padding + (height - 2 * padding) * (1 - i / 5);
        ctx.beginPath();
        ctx.moveTo(padding, y);
        ctx.lineTo(width - padding, y);
        ctx.stroke();
      }
      for (let i = 0; i <= 5; i++) {
        const x = padding + (width - 2 * padding) * i / 5;
        ctx.beginPath();
        ctx.moveTo(x, padding);
        ctx.lineTo(x, height - padding);
        ctx.stroke();
      }

      // Clip region for the curve (so it doesn't overflow)
      ctx.save();
      ctx.beginPath();
      ctx.rect(padding, padding, width - 2 * padding, height - 2 * padding);
      ctx.clip();

      // Draw filled area under full curve (faded)
      ctx.beginPath();
      ctx.moveTo(padding, height - padding);
      for (let i = 1; i <= MAX_SUPPLY; i++) {
        const x = padding + (width - 2 * padding) * (i / MAX_SUPPLY);
        const price = calculatePrice(i, type, steepness);
        const y = height - padding - (height - 2 * padding) * (price / maxPrice);
        ctx.lineTo(x, y);
      }
      ctx.lineTo(width - padding, height - padding);
      ctx.closePath();
      ctx.fillStyle = 'rgba(0, 217, 255, 0.08)';
      ctx.fill();

      // Draw reserve area (up to current supply)
      ctx.beginPath();
      ctx.moveTo(padding, height - padding);
      for (let i = 1; i <= supply; i++) {
        const x = padding + (width - 2 * padding) * (i / MAX_SUPPLY);
        const price = calculatePrice(i, type, steepness);
        const y = height - padding - (height - 2 * padding) * (price / maxPrice);
        ctx.lineTo(x, y);
      }
      const endX = padding + (width - 2 * padding) * (supply / MAX_SUPPLY);
      ctx.lineTo(endX, height - padding);
      ctx.closePath();
      const reserveGradient = ctx.createLinearGradient(0, padding, 0, height - padding);
      reserveGradient.addColorStop(0, 'rgba(255, 159, 67, 0.4)');
      reserveGradient.addColorStop(1, 'rgba(255, 159, 67, 0.1)');
      ctx.fillStyle = reserveGradient;
      ctx.fill();

      // Draw curve
      ctx.beginPath();
      ctx.strokeStyle = '#00d9ff';
      ctx.lineWidth = 3;
      for (let i = 1; i <= MAX_SUPPLY; i++) {
        const x = padding + (width - 2 * padding) * (i / MAX_SUPPLY);
        const price = calculatePrice(i, type, steepness);
        const y = height - padding - (height - 2 * padding) * (price / maxPrice);
        if (i === 1) ctx.moveTo(x, y);
        else ctx.lineTo(x, y);
      }
      ctx.stroke();

      // Draw current position marker
      const currentPrice = calculatePrice(supply, type, steepness);
      const markerX = padding + (width - 2 * padding) * (supply / MAX_SUPPLY);
      const markerY = height - padding - (height - 2 * padding) * (currentPrice / maxPrice);

      // Vertical line to marker
      ctx.beginPath();
      ctx.strokeStyle = 'rgba(255, 159, 67, 0.5)';
      ctx.lineWidth = 2;
      ctx.setLineDash([5, 5]);
      ctx.moveTo(markerX, height - padding);
      ctx.lineTo(markerX, markerY);
      ctx.stroke();

      // Horizontal line to marker
      ctx.beginPath();
      ctx.moveTo(padding, markerY);
      ctx.lineTo(markerX, markerY);
      ctx.stroke();
      ctx.setLineDash([]);

      // Marker dot
      ctx.beginPath();
      ctx.arc(markerX, markerY, 10, 0, Math.PI * 2);
      ctx.fillStyle = '#ff9f43';
      ctx.fill();
      ctx.strokeStyle = '#fff';
      ctx.lineWidth = 2;
      ctx.stroke();

      // Restore from clipping
      ctx.restore();

      // Draw axis labels (outside clipping region)
      for (let i = 0; i <= 5; i++) {
        const y = padding + (height - 2 * padding) * (1 - i / 5);
        ctx.fillStyle = '#666';
        ctx.font = '12px sans-serif';
        ctx.textAlign = 'right';
        ctx.fillText(formatNumber(maxPrice * i / 5), padding - 10, y + 4);
      }
      for (let i = 0; i <= 5; i++) {
        const x = padding + (width - 2 * padding) * i / 5;
        ctx.fillStyle = '#666';
        ctx.font = '12px sans-serif';
        ctx.textAlign = 'center';
        ctx.fillText((MAX_SUPPLY / 5 * i).toFixed(0), x, height - padding + 20);
      }

      // Axis titles
      ctx.fillStyle = '#888';
      ctx.font = '14px sans-serif';
      ctx.textAlign = 'center';
      ctx.fillText('Supply', width / 2, height - 10);
      ctx.save();
      ctx.translate(15, height / 2);
      ctx.rotate(-Math.PI / 2);
      ctx.fillText('Price', 0, 0);
      ctx.restore();

      // Update stats
      const nextPrice = calculatePrice(supply + 1, type, steepness);
      const totalReserve = calculateReserve(supply, type, steepness);
      document.getElementById('currentPrice').textContent = formatNumber(currentPrice);
      document.getElementById('totalReserve').textContent = formatNumber(totalReserve);
      document.getElementById('marketCap').textContent = formatNumber(currentPrice * supply);
      document.getElementById('nextTokenCost').textContent = formatNumber(nextPrice);
      document.getElementById('markerSupply').textContent = supply;
      document.getElementById('markerPrice').textContent = formatNumber(currentPrice);
      document.getElementById('formula').textContent = getFormula(type, steepness);

      // Update button states
      document.getElementById('sellBtn').disabled = supply <= 10;
      document.getElementById('buyBtn').disabled = supply >= MAX_SUPPLY - 9;
    }

    // Event listeners
    curveType.addEventListener('change', draw);
    supplySlider.addEventListener('input', () => {
      supplyValue.textContent = supplySlider.value;
      draw();
    });
    steepnessSlider.addEventListener('input', () => {
      steepnessValue.textContent = parseFloat(steepnessSlider.value).toFixed(1);
      draw();
    });

    // Handle resize
    window.addEventListener('resize', draw);

    // Initial draw
    draw();
  </script>
</body>
</html>