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<body>
<div class="wrap">
<nav class="toc" id="toc">
<div class="toc-title">Contents</div>
<a href="#s1">1. 问题定义</a>
<a href="#s2">2. 六步流程图</a>
<a href="#s3">3. 步骤对照表</a>
<a href="#s4">4. 代码架构映射</a>
<a href="#s5">5. 事件扫描层</a>
<a href="#s6">6. 阅读路径</a>
</nav>
<main class="main">
<section class="hero anim" style="--i:0">
<h1>DexDecoder 六步法：第一性原理可视化导读</h1>
<p class="subtitle">for readers who don't yet understand protocol internals</p>
<p>先不要看实现细节，先看根问题：任何 DEX 报价，本质都在计算同一个函数。</p>
<div class="equation">amountOut = F(protocol_rules, state_before_swap, amountIn, direction)</div>
<div class="grid-3">
<div class="chip"><strong>rules</strong>：协议规则（加权曲线 / 集中流动性 / Hook / Plugin）</div>
<div class="chip"><strong>state</strong>：报价前的真实链上状态快照</div>
<div class="chip"><strong>input</strong>：交易输入量与方向</div>
</div>
</section>
<div id="s1" class="sec-head anim" style="--i:1"><span class="dot"></span>1 — 为什么必须六步</div>
<section class="card anim" style="--i:2">
<p>六步不是流程形式主义，而是「逐步消除不确定性」的验证闭环：先确定池子是谁，再确定状态是什么，再把规则转为可计算模型，最后用链上真值反证本地模拟是否可靠。</p>
</section>
<div id="s2" class="sec-head anim" style="--i:3"><span class="dot"></span>2 — 六步流程图（可缩放）</div>
<section class="mermaid-wrap anim" style="--i:4">
<div class="zoom-controls">
<button onclick="zoomDiagram(this, 1.2)" title="Zoom in">+</button>
<button onclick="zoomDiagram(this, 0.8)" title="Zoom out">−</button>
<button onclick="resetZoom(this)" title="Reset">⟳</button>
</div>
<pre class="mermaid">
flowchart LR
A[Step 1\nPool Discovery] --> B[Step 2\nState Reading]
B --> C[Step 3\nMath Modeling]
C --> D[Step 4\nLocal Simulation]
D --> E[Step 5\nOn-chain Quote]
E --> F[Step 6\nAccuracy Check]
A -.if wrong pool.-> X1[报价对象错误]
B -.if stale/incomplete state.-> X2[模型输入失真]
C -.if formula mismatch.-> X3[数学规则错位]
F --> G{误差在阈值内?}
G -->|Yes| H[模型可用于生产]
G -->|No| I[回溯根因并修正]
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classDef ok fill:#ecf9f0,stroke:#2f6b45,color:#2f6b45,stroke-width:1.2px;
class A,B,C,D,E,F step;
class X1,X2,X3 bad;
class G gate;
class H,I ok;
</pre>
</section>
<div class="legend anim" style="--i:5">
<span><i class="swatch" style="background:var(--ink)"></i>流程步骤</span>
<span><i class="swatch" style="background:var(--amber)"></i>验收关口</span>
<span><i class="swatch" style="background:var(--red)"></i>失败模式</span>
<span><i class="swatch" style="background:var(--green)"></i>可交付结果</span>
</div>
<div id="s3" class="sec-head anim" style="--i:6"><span class="dot"></span>3 — 六步输入/输出/失败模式对照</div>
<section class="table-wrap anim" style="--i:7">
<div class="table-scroll">
<table>
<thead>
<tr>
<th>Step</th>
<th>要解决的问题</th>
<th>输入</th>
<th>输出</th>
<th>失败模式</th>
<th>代码主入口</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>1</strong></td>
<td>我在和哪个池子交互？</td>
<td>事件日志</td>
<td><code>PoolMeta</code></td>
<td><span class="status risk">错池 / 漏池</span></td>
<td><code>discover_pools()</code></td>
</tr>
<tr>
<td><strong>2</strong></td>
<td>池子当前状态是什么？</td>
<td><code>PoolMeta</code> + <code>eth_call</code></td>
<td><code>RawState</code></td>
<td><span class="status risk">快照不一致</span></td>
<td><code>fetch_state()</code></td>
</tr>
<tr>
<td><strong>3</strong></td>
<td>规则如何映射数学？</td>
<td>协议规则 + <code>RawState</code></td>
<td><code>AMMConstraint</code></td>
<td><span class="status warn">公式/单位错位</span></td>
<td><code>build_constraint()</code></td>
</tr>
<tr>
<td><strong>4</strong></td>
<td>本地执行会发生什么？</td>
<td><code>AMMConstraint</code> + 参数</td>
<td>local <code>amountOut</code></td>
<td><span class="status warn">tick 迭代错误</span></td>
<td><code>simulate_swap()</code></td>
</tr>
<tr>
<td><strong>5</strong></td>
<td>链上真实输出是什么？</td>
<td>Quoter / Query 合约</td>
<td>on-chain <code>amountOut</code></td>
<td><span class="status warn">Quoter 限制</span></td>
<td><code>quote_onchain()</code></td>
</tr>
<tr>
<td><strong>6</strong></td>
<td>误差是否可接受？</td>
<td>Step4 vs Step5</td>
<td><code>AccuracyReport</code></td>
<td><span class="status ok">可量化验收</span></td>
<td><code>validate_accuracy()</code></td>
</tr>
</tbody>
</table>
</div>
</section>
<div id="s4" class="sec-head anim" style="--i:8"><span class="dot"></span>4 — 代码架构映射（可缩放）</div>
<section class="mermaid-wrap anim" style="--i:9">
<div class="zoom-controls">
<button onclick="zoomDiagram(this, 1.2)" title="Zoom in">+</button>
<button onclick="zoomDiagram(this, 0.8)" title="Zoom out">−</button>
<button onclick="resetZoom(this)" title="Reset">⟳</button>
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<pre class="mermaid">
flowchart TD
M[main.py] --> R[ProtocolRegistry]
R --> BA[BalancerV2Adapter]
R --> V3[UniswapV3Adapter]
R --> V4[UniswapV4Adapter]
R --> AL[AlgebraAdapter]
BA --> CORE[core.py\nProtocolAdapter / AMMConstraint]
V3 --> CORE
V4 --> CORE
AL --> CORE
V3 --> CL[protocols/concentrated\nswap_math / swap_engine]
V4 --> CL
AL --> CL
EV[events/scanner.py] --> AN[events/analyzer.py]
AN --> REP[events/reporter.py]
EV --> OUT[events.ndjson]
REP --> SUM[summary.json]
REP --> MD[analysis.md]
classDef adapter fill:#ece8ff,stroke:#5a4699,color:#5a4699;
classDef core fill:#eaf3ff,stroke:#1f3a5f,color:#1f3a5f;
classDef event fill:#ecf9f0,stroke:#2f6b45,color:#2f6b45;
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class BA,V3,V4,AL adapter;
class CORE,CL core;
class EV,AN,REP event;
class OUT,SUM,MD output;
</pre>
</section>
<div id="s5" class="sec-head anim" style="--i:10"><span class="dot"></span>5 — 事件扫描层如何补充六步</div>
<section class="card anim" style="--i:11">
<p><strong>六步法</strong>解决的是“某个池子在某个时刻的报价是否可信”；<strong>事件层</strong>解决的是“最近一周发生了什么变化”。两者互补，不互相替代。</p>
<div class="grid-3">
<div class="chip"><strong>scan</strong><br><code>scan_events_last_n_days()</code></div>
<div class="chip"><strong>analyze</strong><br><code>build_weekly_report()</code></div>
<div class="chip"><strong>deliver</strong><br><code>events.ndjson / summary.json / analysis.md</code></div>
</div>
<p class="footer-note">默认窗口：<code>days=7</code>；CLI：<code>python main.py --event-scan --protocol all --days 7 ...</code></p>
</section>
<div id="s6" class="sec-head anim" style="--i:12"><span class="dot"></span>6 — 建议阅读路径（新读者）</div>
<section class="card anim" style="--i:13">
<div class="reading-path">
<article class="path-item">
<h4>Step A · 抽象层</h4>
<p>先读 <code>src/core.py</code>，建立统一心智模型：<code>PoolMeta</code>、<code>RawState</code>、<code>AMMConstraint</code>、<code>ProtocolAdapter</code>。</p>
</article>
<article class="path-item">
<h4>Step B · 最简单协议</h4>
<p>再读 Balancer：<code>src/balancer_adapter.py</code> + <code>src/vault_client.py</code>，看完整闭环。</p>
</article>
<article class="path-item">
<h4>Step C · 共性数学</h4>
<p>读集中流动性共享库：<code>src/protocols/concentrated/swap_math.py</code> 与 <code>swap_engine.py</code>。</p>
</article>
<article class="path-item">
<h4>Step D · 差异层与观测层</h4>
<p>最后读 V3/V4/Algebra 差异，再看 <code>src/events/*</code> 理解“状态变化分析”。</p>
</article>
</div>
</section>
</main>
</div>
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