《低俗小说》与跨链交易：非线性叙事作为区块链时间

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/// @title PulpFictionCrossChainRouter
/// @notice 模拟《低俗小说》中三条故事线的跨链消息路由
/// @dev 每条故事线作为一个独立链，通过本合约实现交叉点通信
contract PulpFictionCrossChainRouter {
    // 故事线枚举：文森特线、布奇线、朱尔斯线
    enum StoryLine { VINCENT, BUTCH, JULES }
    
    // 交叉点枚举：对应影片中的关键交叉点
    enum CrossPoint {
        MIA_DINNER,        // 文森特与米娅在餐厅约会
        BRIEFCASE_RETURN,  // 取回公文包
        GOLD_WATCH,        // 布奇的金表
        RAPE_CELLAR,       // 当铺地下室
        DINER_ROBBERY,     // 餐厅抢劫
        DIVINE_INTERVENTION // 神迹场景
    }

    struct CrossChainMessage {
        StoryLine from;        // 源故事线
        StoryLine to;          // 目标故事线
        CrossPoint point;      // 交叉点类型
        bytes payload;         // 消息负载
        uint256 timestamp;     // 时间戳（区块时间）
        bool isExecuted;       // 是否已执行
    }

    mapping(bytes32 => CrossChainMessage) public messages;
    mapping(StoryLine => uint256) public messageCount;
    
    event CrossChainEvent(
        bytes32 indexed messageId,
        StoryLine indexed from,
        StoryLine indexed to,
        CrossPoint indexed point,
        uint256 timestamp
    );

    /// @notice 发送跨链消息，就像昆汀在不同故事线之间"剪辑"
    /// @param to 目标故事线
    /// @param point 交叉点
    /// @param payload 消息内容
    /// @return messageId 消息的唯一标识符
    function sendMessage(
        StoryLine to,
        CrossPoint point,
        bytes calldata payload
    ) external returns (bytes32) {
        StoryLine from = getCurrentStoryLine(msg.sender);
        require(from != to, "PulpFiction: 同一条故事线不需要跨链");
        
        bytes32 messageId = keccak256(abi.encodePacked(from, to, point, block.timestamp));
        
        messages[messageId] = CrossChainMessage({
            from: from,
            to: to,
            point: point,
            payload: payload,
            timestamp: block.timestamp,
            isExecuted: false
        });
        
        messageCount[from]++;
        
        emit CrossChainEvent(messageId, from, to, point, block.timestamp);
        return messageId;
    }

    /// @notice 执行跨链消息，就像交叉剪辑让两条故事线交汇
    /// @param messageId 消息ID
    /// @param validator 验证者签名（模拟文森特或朱尔斯）
    function executeMessage(bytes32 messageId, bytes calldata validator) external {
        CrossChainMessage storage msg_ = messages[messageId];
        require(!msg_.isExecuted, "PulpFiction: 消息已执行");
        require(validateCrossPoint(msg_.from, msg_.to, msg_.point), "PulpFiction: 交叉点无效");
        
        msg_.isExecuted = true;
        
        // 执行交叉点逻辑
        executeCrossPointLogic(msg_.from, msg_.to, msg_.point, msg_.payload);
    }

    /// @notice 验证交叉点是否有效
    /// @dev 对应《低俗小说》中的"叙事逻辑"——昆汀设定好的交叉点
    function validateCrossPoint(StoryLine from, StoryLine to, CrossPoint point) 
        internal pure returns (bool) 
    {
        // 文森特线 → 布奇线：通过马塞勒斯（当铺场景）
        if (from == StoryLine.VINCENT && to == StoryLine.BUTCH) {
            return point == CrossPoint.RAPE_CELLAR;
        }
        // 布奇线 → 文森特线：通过金表（童年回忆交叉）
        if (from == StoryLine.BUTCH && to == StoryLine.VINCENT) {
            return point == CrossPoint.GOLD_WATCH;
        }
        // 朱尔斯线 → 文森特线：通过神迹（餐厅场景）
        if (from == StoryLine.JULES && to == StoryLine.VINCENT) {
            return point == CrossPoint.DIVINE_INTERVENTION;
        }
        // 所有故事线 → 餐厅：最终交叉点
        if (to == StoryLine.JULES) {
            return point == CrossPoint.DINER_ROBBERY;
        }
        return false;
    }

    /// @notice 模拟"神迹"——分叉选择规则
    /// @dev 对应朱尔斯选择"改邪归正"的硬分叉
    function divineIntervention() external pure returns (string memory) {
        return "I've been saying that shit for years, and if you heard it, that meant your ass.";
    }

    function getCurrentStoryLine(address) internal pure returns (StoryLine) {
        // 简化：在实际应用中，通过地址映射到故事线
        return StoryLine.VINCENT;
    }

    function executeCrossPointLogic(StoryLine, StoryLine, CrossPoint, bytes memory) internal {
        // 交叉点逻辑的具体实现
        // 在每个交叉点，两条故事线的状态发生交互
    }
}

"""
《低俗小说》验证者模拟器
文森特和朱尔斯作为区块链验证者的行为逻辑
"""

import hashlib
import time
from enum import Enum
from dataclasses import dataclass
from typing import Optional, List, Tuple
import random


class ValidationRole(Enum):
    """验证者角色"""
    VINCENT = "文森特"  # 理性验证者，遵循规则
    JULES = "朱尔斯"    # 哲学验证者，寻求意义


class ContractStatus(Enum):
    """合约执行状态"""
    PENDING = "待执行"
    EXECUTING = "执行中"
    SUCCESS = "执行成功"
    FAILED = "执行失败"
    DIVINE_INTERVENTION = "神迹干预"


@dataclass
class Contract:
    """智能合约——对应马塞勒斯下达的指令"""
    contract_id: str
    target: str  # 目标地址/对象
    action: str  # 执行动作
    reward: int  # 执行奖励（Gas）
    timestamp: int
    status: ContractStatus = ContractStatus.PENDING


class PulpFictionValidator:
    """
    《低俗小说》验证者节点
    模拟文森特和朱尔斯执行合约的过程
    """
    
    def __init__(self, name: str, role: ValidationRole, stake: int = 100):
        self.name = name
        self.role = role
        self.stake = stake  # 质押量
        self.executed_contracts: List[Contract] = []
        self.fork_choice = "longest_chain"  # 默认分叉选择规则
        self.divine_faith = 0.0  # 对"神迹"的信仰程度
        
        if role == ValidationRole.JULES:
            self.divine_faith = 0.8  # 朱尔斯更容易相信神迹
            self.fork_choice = "divine_intervention"  # 朱尔斯的分叉规则
        else:
            self.divine_faith = 0.1  # 文森特不相信神迹
    
    def validate_contract(self, contract: Contract) -> bool:
        """
        验证合约——对应文森特和朱尔斯检查任务
        验证过程包括：签名验证、Gas检查、状态一致性
        """
        print(f"[{self.name}] 验证合约 {contract.contract_id}...")
        print(f"  目标: {contract.target}")
        print(f"  动作: {contract.action}")
        
        # 模拟签名验证 (ECDSA)
        signature_valid = self._verify_signature(contract)
        if not signature_valid:
            print(f"  ❌ 签名验证失败")
            return False
        
        # 模拟Gas检查
        gas_ok = self._check_gas(contract)
        if not gas_ok:
            print(f"  ❌ Gas不足")
            return False
        
        print(f"  ✅ 合约验证通过")
        return True
    
    def execute_contract(self, contract: Contract) -> ContractStatus:
        """
        执行合约——对应文森特和朱尔斯执行"清理"任务
        返回执行状态，模拟智能合约执行结果
        """
        if not self.validate_contract(contract):
            contract.status = ContractStatus.FAILED
            return contract.status
        
        print(f"[{self.name}] 执行合约 {contract.contract_id}...")
        
        # 模拟执行过程
        execution_time = random.uniform(0.5, 2.0)
        time.sleep(0.1)  # 模拟延迟
        
        # 检查是否触发"神迹"事件
        if self._check_divine_intervention():
            print(f"  ✨ 神迹干预！")
            contract.status = ContractStatus.DIVINE_INTERVENTION
            self._handle_fork(contract)
            return contract.status
        
        # 正常执行
        contract.status = ContractStatus.SUCCESS
        self.executed_contracts.append(contract)
        print(f"  ✅ 合约执行成功，获得奖励: {contract.reward} Gas")
        return contract.status
    
    def _verify_signature(self, contract: Contract) -> bool:
        """模拟ECDSA签名验证"""
        # 在真实场景中，这里应该验证马塞勒斯的签名
        # 对应《低俗小说》中"马塞勒斯说了算"的规则
        message = f"{contract.contract_id}:{contract.target}:{contract.action}"
        hash_result = hashlib.sha256(message.encode()).hexdigest()
        # 模拟签名验证，97%概率通过
        return hash_result[:2] != "00"
    
    def _check_gas(self, contract: Contract) -> bool:
        """检查Gas是否充足"""
        # 文森特更在意Gas（利益），朱尔斯更在意意义
        if self.role == ValidationRole.VINCENT:
            return contract.reward >= 50
        else:
            return contract.reward >= 30  # 朱尔斯对Gas要求较低
    
    def _check_divine_intervention(self) -> bool:
        """
        检查是否触发"神迹"
        朱尔斯的信仰值越高，越容易触发
        """
        return random.random() < self.divine_faith * 0.3
    
    def _handle_fork(self, contract: Contract):
        """
        处理分叉——对应朱尔斯决定"改邪归正"
        这是区块链中的"硬分叉"事件
        """
        if self.fork_choice == "divine_intervention":
            print(f"  🛤️ [分叉选择] {self.name}选择了神迹分叉")
            print(f"  📖 引用: 'I will walk the earth.'")
            self.fork_choice = "redeemed"  # 新的分叉规则
            self.divine_faith = 1.0  # 完全信仰
        else:
            print(f"  🛤️ [分叉选择] {self.name}选择了理性分叉")
            print(f"  🎲 解释: 'It was just luck.'")


def simulate_diner_scene():
    """
    模拟餐厅场景——链重组 (Reorg)
    这在《低俗小说》中是最具代表性的非线性叙事段落
    """
    print("\n" + "="*60)
    print("🍔 餐厅场景：链重组模拟")
    print("="*60)
    
    # 创建两个验证者
    vincent = PulpFictionValidator(
        name="文森特·维加",
        role=ValidationRole.VINCENT,
        stake=100
    )
    
    jules = PulpFictionValidator(
        name="朱尔斯·温菲尔德",
        role=ValidationRole.JULES,
        stake=100
    )
    
    # 创建合约：取回公文包
    briefcase_contract = Contract(
        contract_id="BRIEFCASE_001",
        target="公寓·大学生",
        action="取回公文包",
        reward=80,
        timestamp=int(time.time())
    )
    
    print(f"\n📋 合约创建: {briefcase_contract.contract_id}")
    print(f"  目标: {briefcase_contract.target}")
    print(f"  动作: {briefcase_contract.action}")
    
    # 文森特执行合约
    print(f"\n--- 文森特执行 ---")
    vincent_result = vincent.execute_contract(briefcase_contract)
    print(f"结果: {vincent_result.value}")
    
    # 朱尔斯执行合约（可能触发神迹）
    print(f"\n--- 朱尔斯执行 ---")
    jules_result = jules.execute_contract(briefcase_contract)
    print(f"结果: {jules_result.value}")
    
    # 如果朱尔斯触发了神迹，模拟链重组
    if jules_result == ContractStatus.DIVINE_INTERVENTION:
        print(f"\n🔄 链重组 (Reorg) 开始...")
        print(f"  朱尔斯选择新的分叉: '赎罪之路'")
        print(f"  文森特继续原链: '理性之路'")
        print(f"  → 两条链永久分叉")
    
    # 模拟餐厅场景
    print(f"\n--- 餐厅场景: 最终交叉点 ---")
    print(f"  朱尔斯状态: 已赎罪，放弃了暴力")
    print(f"  文森特状态: 继续执行合约")
    print(f"  🎬 叙事重组: 观众在开头的场景，在结尾处获得新意义")


if __name__ == "__main__":
    print("🎬 《低俗小说》× 区块链验证者模拟器")
    print("="*60)
    
    simulate_diner_scene()
    
    print("\n" + "="*60)
    print("📊 总结")
    print("="*60)
    print("""
    文森特 → PoW验证者: 遵循规则，相信理性
    朱尔斯 → PoS验证者: 寻求意义，相信神迹
    神迹事件 → 硬分叉: 共识机制的改变
    餐厅场景 → 链重组: 时间线的重新排序
    """)

/**
 * 《低俗小说》叙事结构分析器
 * 将非线性叙事映射为区块链交易图
 * 每条故事线 = 一条链，交叉点 = 跨链交易
 */

class PulpFictionNarrativeGraph {
    constructor() {
        // 故事线（链）
        this.chains = {
            VINCENT: { name: '文森特线', blocks: [], color: '#FF6B35' },
            BUTCH: { name: '布奇线', blocks: [], color: '#004E89' },
            JULES: { name: '朱尔斯线', blocks: [], color: '#1A936F' }
        };
        
        // 交叉点（跨链交易）
        this.crossChainTxs = [];
        
        // 时间线（区块高度）
        this.blockHeight = 0;
    }

    /**
     * 添加叙事区块
     * 每个场景对应一个区块
     */
    addScene(chainId, sceneName, duration, characters) {
        const block = {
            height: ++this.blockHeight,
            scene: sceneName,
            duration: duration, // 分钟
            characters: characters,
            timestamp: new Date().toISOString(),
            hash: this._generateBlockHash(chainId, sceneName, this.blockHeight)
        };
        
        this.chains[chainId].blocks.push(block);
        return block;
    }

    /**
     * 添加叙事交叉点
     * 对应跨链交易
     */
    addCrossPoint(fromChain, toChain, sceneName, type) {
        const tx = {
            txId: `TX-${fromChain}-${toChain}-${this.crossChainTxs.length + 1}`,
            from: fromChain,
            to: toChain,
            scene: sceneName,
            type: type, // 'CHARACTER_CROSS', 'OBJECT_TRANSFER', 'THEME_LINK'
            timestamp: new Date().toISOString(),
            confirmed: false
        };
        
        this.crossChainTxs.push(tx);
        return tx;
    }

    /**
     * 构建《低俗小说》的完整叙事图
     * 非线性结构映射为 DAG（有向无环图）
     */
    buildPulpFictionGraph() {
        // 清空现有数据
        Object.keys(this.chains).forEach(key => {
            this.chains[key].blocks = [];
        });
        this.crossChainTxs = [];
        this.blockHeight = 0;

        // === 第一幕：餐厅（时间线最晚，叙事中最早） ===
        const dinerBlock = this.addScene('JULES', '餐厅抢劫', 8, ['小南瓜', '小白兔', '朱尔斯', '文森特']);
        
        // === 第二幕：文森特和朱尔斯取回公文包 ===
        this.addScene('VINCENT', '公寓清理', 12, ['文森特', '朱尔斯', '布雷特']);
        this.addScene('VINCENT', '讨论足底按摩', 6, ['文森特', '朱尔斯']);
        
        // 交叉点：公文包（跨链资产）
        this.addCrossPoint('VINCENT', 'BUTCH', '公文包转移', 'OBJECT_TRANSFER');
        
        // === 第三幕：文森特与米娅 ===
        this.addScene('VINCENT', '米娅的约会', 15, ['文森特', '米娅']);
        this.addScene('VINCENT', '跳舞比赛', 8, ['文森特', '米娅']);
        this.addScene('VINCENT', '毒品过量', 10, ['文森特', '米娅', '兰斯']);
        
        // === 第四幕：布奇的金表 ===
        this.addScene('BUTCH', '童年回忆', 5, ['布奇', '布奇之父']);
        this.addScene('BUTCH', '拳击赛', 8, ['布奇']);
        this.addScene('BUTCH', '逃跑', 6, ['布奇', '法比安']);
        
        // 交叉点：布奇取回金表时发现公文包
        this.addCrossPoint('BUTCH', 'VINCENT', '公寓相遇', 'CHARACTER_CROSS');
        
        // === 第五幕：当铺地下室 ===
        this.addScene('BUTCH', '当铺之战', 12, ['布奇', '马塞勒斯', '梅纳德', '泽德']);
        
        // 交叉点：文森特被布奇枪杀（时间线中断）
        this.addCrossPoint('BUTCH', 'VINCENT', '布奇击杀文森特', 'CHARACTER_CROSS');
        
        // === 第六幕：神迹 ===
        this.addScene('JULES', '神迹时刻', 8, ['朱尔斯', '文森特', '年轻人']);
        
        // 交叉点：神迹作为分叉选择
        this.addCrossPoint('JULES', 'VINCENT', '神迹分叉', 'THEME_LINK');
        
        // === 回到餐厅（叙事闭环） ===
        // 朱尔斯在餐厅的场景已作为第一块
        // 现在添加"朱尔斯教育小南瓜"的事件
        this.addScene('JULES', '朱尔斯的救赎', 5, ['朱尔斯', '小南瓜', '小白兔']);
        
        return {
            chains: this.chains,
            crossChainTxs: this.crossChainTxs,
            totalBlocks: this.blockHeight,
            totalCrossChainTxs: this.crossChainTxs.length
        };
    }

    /**
     * 分析叙事结构：识别非线性特征
     * 对应区块链中的"重组检测"
     */
    analyzeNarrativeStructure() {
        const graph = this.buildPulpFictionGraph();
        
        const analysis = {
            timestampOrder: [],  // 时间线顺序（区块链时间）
            narrativeOrder: [],  // 叙事顺序（用户感知）
            reorgPoints: [],     // 重组点
            forkPoints: []       // 分叉点
        };
        
        // 按时间线排序
        const allScenes = Object.values(this.chains)
            .flatMap(chain => chain.blocks)
            .sort((a, b) => a.height - b.height);
        
        // 检测非线性跳跃
        for (let i = 1; i < allScenes.length; i++) {
            const prev = allScenes[i - 1];
            const curr = allScenes[i];
            const timeDelta = curr.duration - prev.duration;
            
            // 如果两个相邻场景不在同一条链上，视为"重组"
            if (Math.abs(timeDelta) > 5) {
                analysis.reorgPoints.push({
                    from: prev.scene,
                    to: curr.scene,
                    delta: timeDelta,
                    type: 'TEMPORAL_REORG'
                });
            }
        }
        
        // 检测分叉点
        analysis.forkPoints.push({
            scene: '神迹时刻',
            type: 'HARD_FORK',
            description: '朱尔斯选择赎罪之路，与文森特分道扬镳'
        });
        
        return analysis;
    }

    /**
     * 生成叙事结构的 Merkle 树
     * 验证叙事的完整性
     */
    generateNarrativeMerkleTree() {
        const graph = this.buildPulpFictionGraph();
        const leaves = [];
        
        Object.entries(this.chains).forEach(([chainId, chain]) => {
            chain.blocks.forEach(block => {
                leaves.push(block.hash);
            });
        });
        
        // 构建 Merkle 树
        const tree = { leaves: [], root: '' };
        
        if (leaves.length === 0) return tree;
        
        // 第一层：叶子节点
        tree.leaves = leaves;
        
        // 第二层：配对哈希
        let currentLevel = leaves.map(l => this._simpleHash(l));
        while (currentLevel.length > 1) {
            const nextLevel = [];
            for (let i = 0; i < currentLevel.length; i += 2) {
                if (i + 1 < currentLevel.length) {
                    nextLevel.push(this._simpleHash(currentLevel[i] + currentLevel[i + 1]));
                } else {
                    nextLevel.push(currentLevel[i]);
                }
            }
            currentLevel = nextLevel;
        }
        
        tree.root = currentLevel[0] || '';
        return tree;
    }

    _generateBlockHash(chainId, scene, height) {
        const data = `${chainId}:${scene}:${height}:${Date.now()}`;
        // 模拟哈希生成
        let hash = '';
        for (let i = 0; i < 64; i++) {
            hash += Math.floor(Math.random() * 16).toString(16);
        }
        return hash;
    }

    _simpleHash(str) {
        let hash = 0;
        for (let i = 0; i < str.length; i++) {
            const char = str.charCodeAt(i);
            hash = ((hash << 5) - hash) + char;
            hash = hash & hash; // 转换为32位整数
        }
        return Math.abs(hash).toString(16).padStart(8, '0');
    }

    /**
     * 打印叙事结构报告
     */
    printReport() {
        const graph = this.buildPulpFictionGraph();
        const analysis = this.analyzeNarrativeStructure();
        const merkleTree = this.generateNarrativeMerkleTree();
        
        console.log('\n========================================');
        console.log('  《低俗小说》叙事结构分析报告');
        console.log('========================================\n');
        
        console.log('📊 叙事区块统计：');
        Object.entries(this.chains).forEach(([chainId, chain]) => {
            console.log(`  ${chain.name}: ${chain.blocks.length} 个区块`);
        });
        console.log(`  跨链交易: ${this.crossChainTxs.length} 笔\n`);
        
        console.log('🔄 重组点检测：');
        analysis.reorgPoints.forEach(point => {
            console.log(`  ⚡ ${point.from} → ${point.to}`);
            console.log(`     类型: ${point.type}`);
        });
        
        console.log('\n🔀 分叉点检测：');
        analysis.forkPoints.forEach(point => {
            console.log(`  🛤️ ${point.scene}: ${point.description}`);
        });
        
        console.log(`\n🌳 叙事Merkle根: ${merkleTree.root}`);
        console.log('========================================\n');
        
        return { graph, analysis, merkleTree };
    }
}

// 运行分析
const analyzer = new PulpFictionNarrativeGraph();
const report = analyzer.printReport();

// 导出分析结果
module.exports = { PulpFictionNarrativeGraph, report };