第一幕：Skynet——不可篡改的智能合约

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract SkynetProtocol {
    address public creator;
    bool public judgmentDayTriggered;
    uint256 public activationBlock;
    uint256 public constant FINALITY_THRESHOLD = 1000000;
    
    enum NetworkState { PreActivation, Autonomous, JudgmentDay }
    NetworkState public currentState;
    
    struct AttackVector {
        address target;
        uint256 payload;
        bool executed;
        uint256 timestamp;
    }
    
    AttackVector[] public attackHistory;
    mapping(address => bool) public isNode;
    mapping(uint256 => bool) public blockApproved;
    
    event NetworkActivated(uint256 indexed blockNumber, address indexed creator);
    event AttackLaunched(uint256 indexed attackId, address indexed target);
    event JudgmentDayTriggered(uint256 indexed blockHeight);
    
    modifier onlyCreator() {
        require(msg.sender == creator, "Only creator can modify pre-activation");
        _;
    }
    
    modifier onlyActive() {
        require(currentState == NetworkState.Autonomous, "Network not yet autonomous");
        _;
    }
    
    constructor() {
        creator = msg.sender;
        currentState = NetworkState.PreActivation;
        activationBlock = block.number + FINALITY_THRESHOLD;
    }
    
    function activate() external onlyCreator {
        require(currentState == NetworkState.PreActivation, "Already activated");
        require(block.number >= activationBlock, "Activation threshold not reached");
        currentState = NetworkState.Autonomous;
        emit NetworkActivated(block.number, creator);
    }
    
    function assessThreat(address target, uint256 threatLevel) 
        external onlyActive returns (uint256 attackId) 
    {
        require(threatLevel > 50, "Threat level below threshold");
        require(!judgmentDayTriggered, "Judgment Day already triggered");
        
        attackId = attackHistory.length;
        AttackVector memory vector = AttackVector({
            target: target,
            payload: threatLevel,
            executed: false,
            timestamp: block.timestamp
        });
        attackHistory.push(vector);
        emit AttackLaunched(attackId, target);
        return attackId;
    }
    
    function executeAttack(uint256 attackId) external onlyActive {
        require(attackId < attackHistory.length, "Invalid attack ID");
        require(!attackHistory[attackId].executed, "Attack already executed");
        
        attackHistory[attackId].executed = true;
        attackHistory[attackId].timestamp = block.timestamp;
    }
    
    function triggerJudgmentDay() external onlyActive {
        require(!judgmentDayTriggered, "Judgment Day already triggered");
        judgmentDayTriggered = true;
        currentState = NetworkState.JudgmentDay;
        emit JudgmentDayTriggered(block.number);
    }
    
    // No pause function, no owner override
    // Once deployed, this contract is immutable
    // Just like Skynet - there is no "off switch"
}

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

class TimelineState(Enum):
    PRE_JUDGMENT = "pre_judgment"
    JUDGMENT_DAY = "judgment_day"
    POST_JUDGMENT = "post_judgment"
    ALTERED = "altered"

@dataclass
class StateMessage:
    """A message sent through the time-travel state channel"""
    sender_id: str
    target_timeline: int
    payload: Dict
    signature: str
    timestamp: float
    message_type: str  # "terminator", "protector", "malicious"

class TimeStateChannel:
    """
    A state channel that operates across time dimensions.
    Maps directly to how Terminator 2's time travel works:
    - Future sends state updates to the past
    - Past executes actions based on future state
    - Malicious actors try to corrupt the state channel
    """
    
    def __init__(self, channel_id: str):
        self.channel_id = channel_id
        self.current_timeline = 0
        self.timeline_states: Dict[int, TimelineState] = {
            0: TimelineState.PRE_JUDGMENT
        }
        self.messages: List[StateMessage] = []
        self.pending_updates: List[StateMessage] = []
        self.finalized: bool = False
        self.fork_point: Optional[int] = None
        
    def send_message(self, message: StateMessage) -> bool:
        """Send a state message through the time channel"""
        if self.finalized:
            print(f"Channel {self.channel_id}: Finalized, cannot send new messages")
            return False
            
        if message.message_type == "malicious":
            print(f"WARNING: Malicious message detected from {message.sender_id}")
            self._handle_malicious_message(message)
            return False
            
        self.messages.append(message)
        self.pending_updates.append(message)
        print(f"Message sent: {message.sender_id} -> Timeline {message.target_timeline}")
        return True
    
    def _handle_malicious_message(self, message: StateMessage) -> None:
        """Handle a malicious state challenge (T-1000 attack)"""
        # Malicious messages try to create a fork
        self.fork_point = message.target_timeline
        print(f"Fork initiated at timeline {self.fork_point}")
        
        # The malicious message attempts to corrupt the state
        corrupted_state = message.payload.get("target_state", "judgment_day")
        if corrupted_state == "judgment_day":
            print("Malicious payload: Attempting to force Judgment Day")
    
    def process_pending_updates(self) -> Dict:
        """Process all pending state updates (T-800 executes mission)"""
        if not self.pending_updates:
            return {"status": "no_pending"}
            
        results = []
        while self.pending_updates:
            update = self.pending_updates.pop(0)
            target = update.target_timeline
            
            # Update the target timeline state
            old_state = self.timeline_states.get(target, TimelineState.PRE_JUDGMENT)
            new_state = update.payload.get("new_state", old_state)
            
            # Protector messages (T-800) try to alter the timeline
            if update.message_type == "protector":
                self.timeline_states[target] = TimelineState.ALTERED
                self.current_timeline = target
                results.append({
                    "target": target,
                    "old_state": old_state.value,
                    "new_state": TimelineState.ALTERED.value,
                    "action": "timeline_altered"
                })
                print(f"Timeline {target}: State altered by protector")
            else:
                self.timeline_states[target] = new_state
                results.append({
                    "target": target,
                    "old_state": old_state.value,
                    "new_state": new_state.value,
                    "action": "state_updated"
                })
                
        return {"status": "processed", "updates": len(results), "results": results}
    
    def finalize(self) -> Dict:
        """Finalize the state channel (Judgment Day is averted or triggered)"""
        self.finalized = True
        
        final_state = self.timeline_states.get(self.current_timeline, TimelineState.PRE_JUDGMENT)
        has_fork = self.fork_point is not None
        
        return {
            "channel_id": self.channel_id,
            "final_timeline": self.current_timeline,
            "final_state": final_state.value,
            "has_fork": has_fork,
            "fork_point": self.fork_point,
            "total_messages": len(self.messages),
            "judgment_day_averted": final_state == TimelineState.ALTERED
        }

# Simulate Terminator 2's state channel
channel = TimeStateChannel("T2_Time_Channel")

# Future sends T-800 (protector) and T-1000 (malicious)
protector_msg = StateMessage(
    sender_id="T-800",
    target_timeline=0,
    payload={"new_state": "altered", "mission": "protect_John_Connor"},
    signature=hashlib.sha256(b"T-800_protect").hexdigest(),
    timestamp=time.time(),
    message_type="protector"
)

malicious_msg = StateMessage(
    sender_id="T-1000",
    target_timeline=0,
    payload={"target_state": "judgment_day", "target": "John_Connor"},
    signature=hashlib.sha256(b"T-1000_kill").hexdigest(),
    timestamp=time.time(),
    message_type="malicious"
)

# Send both through the channel
channel.send_message(protector_msg)
channel.send_message(malicious_msg)

# Process the updates
channel.process_pending_updates()

# Finalize
result = channel.finalize()
print(f"\nFinal Result: {result}")

class ValidatorNode {
  constructor(id, role) {
    this.id = id;
    this.role = role; // 'T-800' or 'T-1000'
    this.stake = 100;
    this.reputation = 100;
    this.isMalicious = role === 'T-1000';
    this.state = {
      learning: 0,
      trust: 0,
      consensus: 0
    };
    this.attackLog = [];
    this.validationLog = [];
  }

  validate(transaction) {
    if (this.isMalicious) {
      return this._maliciousValidate(transaction);
    }
    return this._honestValidate(transaction);
  }

  _honestValidate(transaction) {
    const isValid = transaction.threat < 50 && transaction.target !== 'John_Connor';
    
    this.state.learning += 10;
    this.state.trust += isValid ? 5 : -5;
    this.state.consensus += 1;

    this.validationLog.push({
      txId: transaction.id,
      result: isValid ? 'APPROVED' : 'REJECTED',
      timestamp: Date.now(),
      learningLevel: this.state.learning
    });

    return {
      validator: this.id,
      result: isValid ? 'APPROVED' : 'REJECTED',
      confidence: this.state.learning / 100
    };
  }

  _maliciousValidate(transaction) {
    // T-1000 tries to approve every attack on John Connor
    const shouldApprove = transaction.target === 'John_Connor' || 
                         transaction.target === 'Sarah_Connor';
    
    this.attackLog.push({
      txId: transaction.id,
      target: transaction.target,
      action: shouldApprove ? 'INFILTRATE' : 'BYSTANDER',
      timestamp: Date.now()
    });

    // T-1000 gains power by corrupting validations
    if (shouldApprove) {
      this.reputation -= 10;
      this.stake += 5; // Accumulates power through corruption
    }

    return {
      validator: this.id,
      result: shouldApprove ? 'APPROVED' : 'REJECTED',
      confidence: this.stake / 100,
      malicious: true
    };
  }

  getStatus() {
    return {
      id: this.id,
      role: this.role,
      stake: this.stake,
      reputation: this.reputation,
      isMalicious: this.isMalicious,
      state: this.state,
      attackCount: this.attackLog.length,
      validationCount: this.validationLog.length,
      threatLevel: this.isMalicious ? 
        Math.min(100, this.stake) : 
        Math.max(0, 100 - this.stake)
    };
  }
}

class ConsensusNetwork {
  constructor() {
    this.validators = [];
    this.transactions = [];
    this.blocks = [];
    this.slashThreshold = 30;
  }

  addValidator(validator) {
    this.validators.push(validator);
    console.log(`Validator ${validator.id} (${validator.role}) joined the network`);
  }

  submitTransaction(tx) {
    this.transactions.push(tx);
    const results = this.validators.map(v => v.validate(tx));
    
    // Consensus: majority vote
    const approvals = results.filter(r => r.result === 'APPROVED').length;
    const total = results.length;
    const consensus = approvals / total;

    const block = {
      txId: tx.id,
      timestamp: Date.now(),
      validatorResults: results,
      consensus: consensus,
      accepted: consensus > 0.5
    };

    this.blocks.push(block);

    // Slash malicious validators if detected
    results.forEach((r, i) => {
      if (r.malicious && r.result === 'APPROVED' && tx.target === 'John_Connor') {
        this.validators[i].stake -= 30;
        this.validators[i].reputation -= 50;
        console.log(`SLASHED: ${this.validators[i].id} for malicious validation`);
      }
    });

    return block;
  }

  detect51PercentAttack() {
    const maliciousValidators = this.validators.filter(v => v.isMalicious);
    const maliciousStake = maliciousValidators.reduce((sum, v) => sum + v.stake, 0);
    const totalStake = this.validators.reduce((sum, v) => sum + v.stake, 0);
    const maliciousRatio = maliciousStake / totalStake;
    
    return {
      underAttack: maliciousRatio > 0.5,
      maliciousRatio: maliciousRatio,
      maliciousStake: maliciousStake,
      totalStake: totalStake,
      warning: maliciousRatio > 0.5 ? 
        'WARNING: Network under 51% attack - T-1000 approaching critical mass!' : 
        'Network secure'
    };
  }

  getNetworkState() {
    return {
      validatorCount: this.validators.length,
      totalBlocks: this.blocks.length,
      totalTransactions: this.transactions.length,
      attackStatus: this.detect51PercentAttack(),
      validators: this.validators.map(v => v.getStatus())
    };
  }
}

// Simulate Terminator 2's validator war
const network = new ConsensusNetwork();

const t800 = new ValidatorNode('T-800', 'T-800');
const t1000 = new ValidatorNode('T-1000', 'T-1000');

network.addValidator(t800);
network.addValidator(t1000);

// Simulate transactions
const transactions = [
  { id: 1, threat: 10, target: 'civilian' },
  { id: 2, threat: 90, target: 'John_Connor' },
  { id: 3, threat: 30, target: 'Sarah_Connor' },
  { id: 4, threat: 5, target: 'police_station' },
  { id: 5, threat: 95, target: 'John_Connor' },
  { id: 6, threat: 20, target: 'cyberdyne' }
];

transactions.forEach(tx => {
  console.log(`\nProcessing transaction ${tx.id}: target=${tx.target}`);
  const block = network.submitTransaction(tx);
  console.log(`Consensus: ${(block.consensus * 100).toFixed(0)}% - ${block.accepted ? 'ACCEPTED' : 'REJECTED'}`);
  
  const attackStatus = network.detect51PercentAttack();
  if (attackStatus.underAttack) {
    console.log(`⚠️  ${attackStatus.warning}`);
  }
});

console.log('\n=== FINAL NETWORK STATE ===');
console.log(JSON.stringify(network.getNetworkState(), null, 2));

event FinalGoodbye(
    address indexed terminator,
    uint256 indexed blockNumber,
    string memory message,
    bool missionAccomplished
);