《星际穿越》与跨链桥：引力异常作为LayerZero的消息传递层

// SPDX-License-Identifier: MIT
// LayerZero跨链消息合约 - 模拟星际穿越的引力通信
pragma solidity ^0.8.19;

import "@layerzerolabs/lz-evm-oapp-v2/contracts/oapp/OApp.sol";

contract InterstellarBridge is OApp {
    
    string public lastMessage;
    mapping(uint32 => uint256) public chainTimelines;
    
    event MessageSent(
        uint32 indexed dstChainId, 
        string payload, 
        uint256 gravityWaves
    );
    
    event MessageReceived(
        uint32 indexed srcChainId, 
        string payload, 
        uint256 timeline
    );
    
    constructor(address _endpoint, address _delegate) 
        OApp(_endpoint, _delegate) {}
    
    // 库珀向五维空间发送引力信号
    function sendGravitySignal(
        uint32 dstChainId,
        string calldata message,
        bytes calldata _options
    ) external payable {
        bytes memory _payload = abi.encode(message, block.timestamp);
        
        _lzSend(
            dstChainId,
            _payload,
            _options,
            // 预言机费用和中继器费用
            MessagingFee(msg.value, 0),
            payable(msg.sender)
        );
        
        chainTimelines[dstChainId] = block.timestamp;
        emit MessageSent(dstChainId, message, block.timestamp);
    }
    
    // 墨菲接收来自五维空间的引力波信号
    function _lzReceive(
        uint32 _srcChainId,
        bytes32 _guid,
        bytes calldata _payload,
        address, // executor
        bytes calldata // extraData
    ) internal override {
        (string memory message, uint256 timeline) = 
            abi.decode(_payload, (string, uint256));
        
        lastMessage = message;
        
        emit MessageReceived(
            _srcChainId, 
            message, 
            timeline
        );
    }
    
    // 查询最后收到的"引力波"消息
    function getLastMessage() external view returns (string memory) {
        return lastMessage;
    }
}

"""
Python模拟：LayerZero跨链消息聚合器
对应《星际穿越》中引力透镜的"光线弯曲"效应
"""
import hashlib
import time
from dataclasses import dataclass
from typing import List, Dict, Optional, Tuple
from enum import Enum

class ChainType(Enum):
    ETHEREUM = "ethereum"
    SOLANA = "solana"
    BNB = "bnb"
    POLYGON = "polygon"
    # 对应电影中的不同星系

@dataclass
class CrossChainMessage:
    """跨链消息 - 对应引力波信号"""
    src_chain: ChainType
    dst_chain: ChainType
    payload: str
    timestamp: int
    block_number: int
    message_id: str
    nonce: int
    
    def __post_init__(self):
        if not self.message_id:
            raw = f"{self.src_chain}-{self.dst_chain}-{self.timestamp}-{self.nonce}"
            self.message_id = hashlib.sha256(raw.encode()).hexdigest()[:16]

class OracleNode:
    """预言机节点 - 对应五维空间的"他们""""
    def __init__(self, name: str):
        self.name = name
        self.block_headers: Dict[str, dict] = {}
    
    def observe_block_header(self, chain: ChainType, block_number: int, 
                              block_hash: str) -> dict:
        """观察链上区块头，类似库珀观察书架上的时间线"""
        header = {
            "chain": chain.value,
            "block_number": block_number,
            "block_hash": block_hash,
            "observed_at": int(time.time())
        }
        key = f"{chain.value}:{block_number}"
        self.block_headers[key] = header
        print(f"[Oracle:{self.name}] 观察 {chain.value} 区块 #{block_number}")
        return header

class RelayerNode:
    """中继器节点 - 对应库珀作为信息的传递者"""
    def __init__(self, name: str):
        self.name = name
        self.proofs: Dict[str, bytes] = {}
    
    def relay_transaction_proof(self, message: CrossChainMessage, 
                                 proof: bytes) -> bytes:
        """中继交易证明，类似库珀用手表传递摩尔斯电码"""
        key = message.message_id
        self.proofs[key] = proof
        print(f"[Relayer:{self.name}] 中继消息 {message.message_id}")
        return proof

class GravityLens:
    """引力透镜消息聚合器
    
    对应电影中加加林黑洞的引力透镜效应，
    将多条光线（消息）汇聚到一个焦点（目标链）。
    """
    def __init__(self, name: str = "Gargantua"):
        self.name = name
        self.oracles: List[OracleNode] = []
        self.relayers: List[RelayerNode] = []
        self.message_queue: List[CrossChainMessage] = []
        self.aggregated_batches: Dict[str, List[CrossChainMessage]] = {}
    
    def add_oracle(self, oracle: OracleNode):
        self.oracles.append(oracle)
    
    def add_relayer(self, relayer: RelayerNode):
        self.relayers.append(relayer)
    
    def receive_message(self, message: CrossChainMessage) -> bool:
        """接收跨链消息，对应引力透镜捕获光线
        
        验证逻辑：
        1. Oracle确认区块头存在
        2. Relayer确认交易证明有效
        3. 双重验证通过后聚合消息
        """
        # 模拟双重验证
        oracle_match = any(
            h.get("block_number") == message.block_number
            for o in self.oracles
            for k, h in o.block_headers.items()
            if k.startswith(message.src_chain.value)
        )
        
        relayer_match = any(
            msg_id == message.message_id
            for r in self.relayers
            for msg_id in r.proofs
        )
        
        if oracle_match and relayer_match:
            self.message_queue.append(message)
            print(f"[GravityLens] ✓ 消息 {message.message_id} 验证通过")
            return True
        
        print(f"[GravityLens] ✗ 消息 {message.message_id} 验证失败")
        return False
    
    def aggregate_messages(self, max_batch: int = 10) -> Dict[str, List[CrossChainMessage]]:
        """聚合消息，对应引力透镜将光线汇聚到焦点
        
        将多个消息打包成一个批次，
        减少目标链上的Gas消耗。
        """
        batch_id = hashlib.sha256(
            str(int(time.time())).encode()
        ).hexdigest()[:8]
        
        batch = self.message_queue[:max_batch]
        self.message_queue = self.message_queue[max_batch:]
        
        self.aggregated_batches[batch_id] = batch
        print(f"[GravityLens] 聚合批次 {batch_id}: {len(batch)} 条消息")
        
        return {batch_id: batch}
    
    def deliver_to_target(self, batch_id: str, target_chain: ChainType) -> bool:
        """将聚合后的消息批次交付到目标链
        
        对应引力透镜将聚焦后的光线投射到接收器。
        """
        if batch_id not in self.aggregated_batches:
            return False
        
        batch = self.aggregated_batches[batch_id]
        print(f"[GravityLens] 交付 {len(batch)} 条消息至 {target_chain.value}")
        
        messages_detail = "\n".join(
            f"  - {m.payload[:30]}... (来自 {m.src_chain.value})"
            for m in batch
        )
        print(f"[GravityLens] 消息清单:\n{messages_detail}")
        
        return True

# 模拟跨链通信
if __name__ == "__main__":
    lens = GravityLens("加加林黑洞-LayerZero桥")
    
    oracle = OracleNode("Oracle-A")
    relayer = RelayerNode("Relayer-B")
    
    lens.add_oracle(oracle)
    lens.add_relayer(relayer)
    
    # 模拟观察区块头
    oracle.observe_block_header(ChainType.ETHEREUM, 19420001, 
                                "0xabcd...")
    
    # 模拟跨链消息
    msg1 = CrossChainMessage(
        src_chain=ChainType.ETHEREUM,
        dst_chain=ChainType.SOLANA,
        payload="STAY - 不要离开墨菲",
        timestamp=int(time.time()),
        block_number=19420001,
        message_id="",
        nonce=1
    )
    
    relayer.relay_transaction_proof(msg1, b"proof_data_001")
    
    # 通过引力透镜验证
    if lens.receive_message(msg1):
        batch = lens.aggregate_messages()
        for bid in batch:
            lens.deliver_to_target(bid, ChainType.SOLANA)

// JavaScript：跨链桥的"祖父悖论"检测器
// 模拟《星际穿越》中块状宇宙的时间一致性验证

const crypto = require('crypto');

class TimeParadoxDetector {
  constructor() {
    this.chainStates = new Map();
    this.confirmedTimelines = new Map();
    this.pendingMessages = [];
  }
  
  /**
   * 记录链上状态 - 对应块状宇宙中的"时间切片"
   * @param {string} chainId - 链ID
   * @param {number} blockNumber - 区块号
   * @param {string} blockHash - 区块哈希
   * @param {number} confirmations - 确认数
   */
  recordBlockState(chainId, blockNumber, blockHash, confirmations) {
    const key = `${chainId}:${blockNumber}`;
    this.chainStates.set(key, {
      chainId,
      blockNumber,
      blockHash,
      confirmations,
      timestamp: Date.now(),
      finality: this.calculateFinality(confirmations)
    });
    
    console.log(`[块状宇宙] 记录 ${chainId} 区块 #${blockNumber} (确认: ${confirmations})`);
  }
  
  /**
   * 计算最终性 - 对应时间膨胀系数
   * 不同链有不同的最终性标准
   */
  calculateFinality(confirmations) {
    if (confirmations >= 64) return 'FINALIZED';  // 不可篡改
    if (confirmations >= 32) return 'STRONG';      // 极大概率
    if (confirmations >= 15) return 'CONFIRMED';   // 已确认
    if (confirmations >= 6) return 'PENDING';      // 待定
    return 'UNSAFE';                                // 不安全
  }
  
  /**
   * 检测时间悖论 - 对应祖父悖论检查
   * @param {string} srcChain - 源链
   * @param {number} srcBlock - 源链区块
   * @param {string} srcHash - 原始区块哈希
   * @param {string} currentHash - 当前区块哈希
   * @returns {boolean} 是否存在悖论
   */
  detectParadox(srcChain, srcBlock, srcHash, currentHash) {
    const key = `${srcChain}:${srcBlock}`;
    const stored = this.chainStates.get(key);
    
    if (!stored) {
      console.log(`[祖父悖论] ⚠️ 找不到 ${key} 的历史状态`);
      return false;
    }
    
    // 如果当前的哈希与记录的不一致，说明发生了链回滚
    if (stored.blockHash !== currentHash) {
      console.log(`[祖父悖论] 🚨 检测到时间悖论！`);
      console.log(`  记录: ${stored.blockHash}`);
      console.log(`  当前: ${currentHash}`);
      console.log(`  区块 #${srcBlock} 已被回滚`);
      return true;
    }
    
    // 检查最终性
    if (stored.finality === 'FINALIZED') {
      console.log(`[祖父悖论] ✓ 区块 #${srcBlock} 已最终确定，无悖论风险`);
    } else {
      console.log(`[祖父悖论] ⚠️ 区块 #${srcBlock} 最终性仅为 ${stored.finality}`);
    }
    
    return false;
  }
  
  /**
   * 发送跨链消息 - 对应库珀的引力波通信
   * @param {Object} message - 跨链消息
   * @returns {Promise<boolean>} 是否成功发送
   */
  async sendCrossChainMessage(message) {
    const { id, srcChain, srcBlock, dstChain, payload } = message;
    
    console.log(`\n[引力波通信] 发送消息 ${id}`);
    console.log(`  源链: ${srcChain} 区块 #${srcBlock}`);
    console.log(`  目标链: ${dstChain}`);
    console.log(`  内容: ${payload}`);
    
    // 检查源链状态的最终性
    const srcKey = `${srcChain}:${srcBlock}`;
    const srcState = this.chainStates.get(srcKey);
    
    if (!srcState) {
      console.log(`[引力波通信] ❌ 源链状态未知，拒绝发送`);
      return false;
    }
    
    if (srcState.finality === 'UNSAFE') {
      console.log(`[引力波通信] ❌ 源链状态不安全，等待更多确认`);
      return false;
    }
    
    // 模拟等待
    const waitTime = srcState.finality === 'FINALIZED' ? 100 : 500;
    await new Promise(resolve => setTimeout(resolve, waitTime));
    
    this.pendingMessages.push({
      ...message,
      sentAt: Date.now(),
      status: 'PENDING_DELIVERY'
    });
    
    console.log(`[引力波通信] ✅ 消息已发送，等待目标链确认`);
    return true;
  }
  
  /**
   * 在目标链上交付消息 - 对应墨菲解码引力信号
   * @param {string} messageId - 消息ID
   * @returns {boolean}
   */
  deliverMessage(messageId) {
    const msg = this.pendingMessages.find(m => m.id === messageId);
    
    if (!msg) {
      console.log(`[墨菲解码] ❌ 消息 ${messageId} 不存在`);
      return false;
    }
    
    // 再次检查源链状态，确保没有悖论
    const srcKey = `${msg.srcChain}:${msg.srcBlock}`;
    const srcState = this.chainStates.get(srcKey);
    
    if (!srcState || srcState.finality !== 'FINALIZED') {
      console.log(`[墨菲解码] ⏳ 等待源链最终确认...`);
      return false;
    }
    
    msg.status = 'DELIVERED';
    msg.deliveredAt = Date.now();
    
    console.log(`[墨菲解码] ✅ 消息 ${messageId} 已交付！`);
    console.log(`  "不要温柔地走进那个良夜"`);
    console.log(`  来源: ${msg.srcChain} → 目标: ${msg.dstChain}`);
    console.log(`  延迟: ${msg.deliveredAt - msg.sentAt}ms`);
    
    return true;
  }
  
  /**
   * 模拟链回滚事件 - 对应祖父悖论的形成
   */
  simulateReorg(chainId, blockNumber, newHash) {
    const key = `${chainId}:${blockNumber}`;
    const oldState = this.chainStates.get(key);
    
    if (oldState) {
      console.log(`\n[链回滚] ⚠️ ${chainId} 发生重组！`);
      console.log(`  区块 #${blockNumber} 哈希变更:`);
      console.log(`  旧: ${oldState.blockHash}`);
      console.log(`  新: ${newHash}`);
      
      // 更新状态
      this.chainStates.set(key, {
        ...oldState,
        blockHash: newHash,
        confirmations: 0,
        finality: 'UNSAFE'
      });
    }
  }
}

// 模拟跨链通信场景
async function simulateInterstellarBridge() {
  const detector = new TimeParadoxDetector();
  
  console.log('=== 《星际穿越》跨链桥模拟 ===\n');
  
  // 记录链上状态
  detector.recordBlockState('Ethereum', 19420001, '0xabcd...', 64);
  detector.recordBlockState('Ethereum', 19420002, '0xef01...', 32);
  detector.recordBlockState('Ethereum', 19420003, '0x2345...', 6);
  detector.recordBlockState('Solana', 285000001, '0x6789...', 500);
  
  console.log('\n--- 发送第一组消息：已最终化的区块 ---');
  await detector.sendCrossChainMessage({
    id: 'MSG-001',
    srcChain: 'Ethereum',
    srcBlock: 19420001,
    dstChain: 'Solana',
    payload: 'STAY - 不要温柔地走进那个良夜'
  });
  
  console.log('\n--- 发送第二组消息：未最终化的区块 ---');
  await detector.sendCrossChainMessage({
    id: 'MSG-002',
    srcChain: 'Ethereum',
    srcBlock: 19420003,
    dstChain: 'Solana',
    payload: 'DOCK - 对接永恒号空间站'
  });
  
  console.log('\n--- 模拟链回滚：祖父悖论出现 ---');
  detector.simulateReorg('Ethereum', 19420003, '0x9999...');
  
  console.log('\n--- 检测悖论并尝试交付 ---');
  detector.detectParadox('Ethereum', 19420003, '0x2345...', '0x9999...');
  
  detector.deliverMessage('MSG-001');
  detector.deliverMessage('MSG-002');
  
  console.log('\n=== 模拟结束 ===');
}

simulateInterstellarBridge();