《西北偏北》与跨链路由：逃亡路线作为IBC协议的拓扑

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

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

contract IBCRouter is AccessControl, ReentrancyGuard {
    bytes32 public constant RELAYER_ROLE = keccak256("RELAYER_ROLE");
    bytes32 public constant VALIDATOR_ROLE = keccak256("VALIDATOR_ROLE");

    enum ConnectionState {
        INIT, TRYOPEN, OPEN, CLOSED, TIMEOUT
    }

    enum PacketStatus {
        SENT, RECEIVED, ACKNOWLEDGED, TIMEOUT, REFUNDED
    }

    struct IBCConnection {
        uint256 connectionId;
        string counterpartyChain;
        bytes32 counterpartyClientId;
        ConnectionState state;
        uint256 lastPacketSequence;
        uint256 timeoutHeight;
        bool isActive;
    }

    struct IBCChannel {
        uint256 channelId;
        uint256 connectionId;
        string portId;
        string counterpartyPort;
        uint256 nextSequenceSend;
        uint256 nextSequenceRecv;
        bool isActive;
    }

    struct IBCPacket {
        uint256 packetId;
        uint256 channelId;
        uint256 sequence;
        address sender;
        address receiver;
        bytes data;
        uint256 timeoutHeight;
        uint256 timeoutTimestamp;
        PacketStatus status;
        uint256 sentAt;
    }

    struct CrossChainRoute {
        uint256 routeId;
        string sourceChain;
        string destChain;
        uint256[] hops;
        uint256 estimatedTime;
        uint256 fee;
        bool isActive;
    }

    mapping(uint256 => IBCConnection) public connections;
    mapping(uint256 => IBCChannel) public channels;
    mapping(uint256 => IBCPacket) public packets;
    mapping(uint256 => CrossChainRoute) public routes;

    uint256 public connectionCount;
    uint256 public channelCount;
    uint256 public packetCount;
    uint256 public routeCount;

    event ConnectionOpened(uint256 indexed connectionId, string counterpartyChain);
    event PacketSent(uint256 indexed packetId, uint256 indexed channelId, uint256 sequence);
    event PacketReceived(uint256 indexed packetId, uint256 indexed channelId);
    event RouteEstablished(uint256 indexed routeId, string source, string dest);

    function openConnection(
        string memory _counterpartyChain,
        bytes32 _counterpartyClientId
    ) external onlyRole(VALIDATOR_ROLE) returns (uint256) {
        connectionCount++;
        connections[connectionCount] = IBCConnection({
            connectionId: connectionCount,
            counterpartyChain: _counterpartyChain,
            counterpartyClientId: _counterpartyClientId,
            state: ConnectionState.OPEN,
            lastPacketSequence: 0,
            timeoutHeight: 0,
            isActive: true
        });

        emit ConnectionOpened(connectionCount, _counterpartyChain);
        return connectionCount;
    }

    function openChannel(
        uint256 _connectionId,
        string memory _portId,
        string memory _counterpartyPort
    ) external onlyRole(RELAYER_ROLE) returns (uint256) {
        require(connections[_connectionId].isActive, "Connection not active");
        channelCount++;

        channels[channelCount] = IBCChannel({
            channelId: channelCount,
            connectionId: _connectionId,
            portId: _portId,
            counterpartyPort: _counterpartyPort,
            nextSequenceSend: 0,
            nextSequenceRecv: 0,
            isActive: true
        });

        return channelCount;
    }

    function sendPacket(
        uint256 _channelId,
        address _receiver,
        bytes calldata _data,
        uint256 _timeoutHeight
    ) external nonReentrant returns (uint256) {
        IBCChannel storage channel = channels[_channelId];
        require(channel.isActive, "Channel not active");

        packetCount++;
        uint256 sequence = channel.nextSequenceSend;
        channel.nextSequenceSend++;

        packets[packetCount] = IBCPacket({
            packetId: packetCount,
            channelId: _channelId,
            sequence: sequence,
            sender: msg.sender,
            receiver: _receiver,
            data: _data,
            timeoutHeight: _timeoutHeight,
            timeoutTimestamp: block.timestamp + 7 days,
            status: PacketStatus.SENT,
            sentAt: block.timestamp
        });

        emit PacketSent(packetCount, _channelId, sequence);
        return packetCount;
    }

    function receivePacket(
        uint256 _packetId
    ) external onlyRole(RELAYER_ROLE) {
        IBCPacket storage packet = packets[_packetId];
        require(packet.status == PacketStatus.SENT, "Packet not sent");
        packet.status = PacketStatus.RECEIVED;

        emit PacketReceived(_packetId, packet.channelId);
    }

    function establishRoute(
        string memory _sourceChain,
        string memory _destChain,
        uint256[] memory _hops
    ) external onlyRole(RELAYER_ROLE) returns (uint256) {
        routeCount++;
        routes[routeCount] = CrossChainRoute({
            routeId: routeCount,
            sourceChain: _sourceChain,
            destChain: _destChain,
            hops: _hops,
            estimatedTime: _hops.length * 30,
            fee: _hops.length * 10,
            isActive: true
        });

        emit RouteEstablished(routeCount, _sourceChain, _destChain);
        return routeCount;
    }

    function calculateRouteFee(uint256 _routeId) external view returns (uint256) {
        return routes[_routeId].fee;
    }
}

import asyncio
import aiohttp
from typing import Dict, List, Tuple, Optional
from dataclasses import dataclass
from datetime import datetime
import json
import heapq

@dataclass
class ChainNode:
    chain_id: str
    name: str
    latency: int
    fee_per_tx: float
    tps: int
    security_score: int

@dataclass
class CrossChainRoute:
    source: str
    destination: str
    hops: List[str]
    total_fee: float
    estimated_time: int
    security_score: int

class IBCRouter:
    def __init__(self):
        self.chains: Dict[str, ChainNode] = {}
        self.connections: Dict[Tuple[str, str], Dict] = {}
        self.active_routes: Dict[str, CrossChainRoute] = {}

    def add_chain(self, chain: ChainNode):
        self.chains[chain.chain_id] = chain

    def add_connection(self, chain_a: str, chain_b: str, fee: float, latency: int):
        self.connections[(chain_a, chain_b)] = {
            'fee': fee,
            'latency': latency,
            'is_active': True
        }
        self.connections[(chain_b, chain_a)] = {
            'fee': fee,
            'latency': latency,
            'is_active': True
        }

    def find_shortest_path(self, source: str, dest: str) -> CrossChainRoute:
        if source not in self.chains or dest not in self.chains:
            raise ValueError("Chain not found")

        distances = {chain: float('inf') for chain in self.chains}
        distances[source] = 0
        previous = {chain: None for chain in self.chains}
        pq = [(0, source)]

        while pq:
            current_dist, current = heapq.heappop(pq)
            if current == dest:
                break

            for neighbor in self.chains:
                if (current, neighbor) in self.connections:
                    conn = self.connections[(current, neighbor)]
                    if conn['is_active']:
                        new_dist = current_dist + conn['latency']
                        if new_dist < distances[neighbor]:
                            distances[neighbor] = new_dist
                            previous[neighbor] = current
                            heapq.heappush(pq, (new_dist, neighbor))

        path = []
        current = dest
        while current is not None:
            path.append(current)
            current = previous[current]
        path.reverse()

        if len(path) < 2:
            raise ValueError("No path found")

        total_fee = sum(self.connections[(path[i], path[i+1])]['fee']
                       for i in range(len(path)-1)
                       if (path[i], path[i+1]) in self.connections)

        route = CrossChainRoute(
            source=source,
            destination=dest,
            hops=path,
            total_fee=total_fee,
            estimated_time=distances[dest],
            security_score=min(self.chains[chain].security_score for chain in path)
        )
        return route

    def find_cheapest_path(self, source: str, dest: str) -> CrossChainRoute:
        chains = list(self.chains.keys())
        if source not in chains or dest not in chains:
            raise ValueError("Chain not found")

        distances = {chain: float('inf') for chain in chains}
        distances[source] = 0
        previous = {chain: None for chain in chains}
        pq = [(0, source)]

        while pq:
            current_dist, current = heapq.heappop(pq)
            if current == dest:
                break

            for neighbor in chains:
                if (current, neighbor) in self.connections:
                    conn = self.connections[(current, neighbor)]
                    if conn['is_active']:
                        new_dist = current_dist + conn['fee']
                        if new_dist < distances[neighbor]:
                            distances[neighbor] = new_dist
                            previous[neighbor] = current
                            heapq.heappush(pq, (new_dist, neighbor))

        path = []
        current = dest
        while current is not None:
            path.append(current)
            current = previous[current]
        path.reverse()

        if len(path) < 2:
            raise ValueError("No path found")

        total_fee = sum(self.connections[(path[i], path[i+1])]['fee']
                       for i in range(len(path)-1)
                       if (path[i], path[i+1]) in self.connections)

        route = CrossChainRoute(
            source=source,
            destination=dest,
            hops=path,
            total_fee=total_fee,
            estimated_time=distances[dest],
            security_score=min(self.chains[chain].security_score for chain in path)
        )
        return route

    def find_best_route(self, source: str, dest: str, weight: str = 'balanced') -> CrossChainRoute:
        chains = list(self.chains.keys())
        distances = {chain: float('inf') for chain in chains}
        distances[source] = 0
        previous = {chain: None for chain in chains}
        pq = [(0, source)]

        while pq:
            current_dist, current = heapq.heappop(pq)
            if current == dest:
                break

            for neighbor in chains:
                if (current, neighbor) in self.connections:
                    conn = self.connections[(current, neighbor)]
                    if conn['is_active']:
                        if weight == 'latency':
                            new_dist = current_dist + conn['latency']
                        elif weight == 'fee':
                            new_dist = current_dist + conn['fee']
                        else:
                            new_dist = current_dist + conn['latency'] * 0.5 + conn['fee'] * 0.5

                        if new_dist < distances[neighbor]:
                            distances[neighbor] = new_dist
                            previous[neighbor] = current
                            heapq.heappush(pq, (new_dist, neighbor))

        path = []
        current = dest
        while current is not None:
            path.append(current)
            current = previous[current]
        path.reverse()

        if len(path) < 2:
            raise ValueError("No path found")

        total_fee = sum(self.connections[(path[i], path[i+1])]['fee']
                       for i in range(len(path)-1)
                       if (path[i], path[i+1]) in self.connections)

        return CrossChainRoute(
            source=source,
            destination=dest,
            hops=path,
            total_fee=total_fee,
            estimated_time=distances[dest],
            security_score=min(self.chains[chain].security_score for chain in path)
        )

router = IBCRouter()
router.add_chain(ChainNode('ethereum', 'Ethereum', 100, 0.01, 15, 95))
router.add_chain(ChainNode('cosmos', 'Cosmos Hub', 30, 0.001, 1000, 85))
router.add_chain(ChainNode('solana', 'Solana', 10, 0.0001, 5000, 75))
router.add_connection('ethereum', 'cosmos', 0.005, 50)
router.add_connection('cosmos', 'solana', 0.002, 20)
route = router.find_best_route('ethereum', 'solana', 'balanced')
print(f"Route: {' -> '.join(route.hops)}, Fee: {route.total_fee}, Time: {route.estimated_time}")

const { ethers } = require('ethers');

class CrossChainRouter {
  constructor(providerUrls) {
    this.providers = {};
    this.chains = {};
    this.routes = new Map();
    this.connectionGraph = new Map();

    for (const [chainId, url] of Object.entries(providerUrls)) {
      this.providers[chainId] = new ethers.providers.JsonRpcProvider(url);
    }
  }

  addChain(chainId, name, metadata) {
    this.chains[chainId] = {
      chainId,
      name,
      latency: metadata.latency || 100,
      feePerTx: metadata.feePerTx || 0.01,
      tps: metadata.tps || 15,
      securityScore: metadata.securityScore || 50,
      isActive: true
    };
    this.connectionGraph.set(chainId, []);
  }

  addConnection(chainA, chainB, metadata) {
    if (!this.connectionGraph.has(chainA) || !this.connectionGraph.has(chainB)) {
      throw new Error('Chain not found');
    }

    const connection = {
      source: chainA,
      target: chainB,
      fee: metadata.fee || 0.005,
      latency: metadata.latency || 50,
      isActive: true
    };

    this.connectionGraph.get(chainA).push({ ...connection, target: chainB });
    this.connectionGraph.get(chainB).push({ ...connection, target: chainA });
  }

  findShortestPath(source, destination) {
    const distances = new Map();
    const previous = new Map();
    const pq = [];

    for (const chainId of Object.keys(this.chains)) {
      distances.set(chainId, Infinity);
      previous.set(chainId, null);
    }
    distances.set(source, 0);
    pq.push({ chain: source, distance: 0 });

    while (pq.length > 0) {
      pq.sort((a, b) => a.distance - b.distance);
      const { chain: current } = pq.shift();

      if (current === destination) break;

      const neighbors = this.connectionGraph.get(current) || [];
      for (const conn of neighbors) {
        if (!conn.isActive) continue;
        const newDist = distances.get(current) + conn.latency;
        if (newDist < distances.get(conn.target)) {
          distances.set(conn.target, newDist);
          previous.set(conn.target, current);
          pq.push({ chain: conn.target, distance: newDist });
        }
      }
    }

    const path = [];
    let current = destination;
    while (current !== null) {
      path.unshift(current);
      current = previous.get(current);
    }

    if (path.length < 2) return null;

    let totalFee = 0;
    for (let i = 0; i < path.length - 1; i++) {
      const conns = this.connectionGraph.get(path[i]) || [];
      const conn = conns.find(c => c.target === path[i + 1]);
      if (conn) totalFee += conn.fee;
    }

    return {
      source,
      destination,
      hops: path,
      totalFee,
      estimatedTime: distances.get(destination),
      securityScore: Math.min(...path.map(c => this.chains[c].securityScore))
    };
  }

  findCheapestPath(source, destination) {
    const distances = new Map();
    const previous = new Map();
    const pq = [];

    for (const chainId of Object.keys(this.chains)) {
      distances.set(chainId, Infinity);
      previous.set(chainId, null);
    }
    distances.set(source, 0);
    pq.push({ chain: source, distance: 0 });

    while (pq.length > 0) {
      pq.sort((a, b) => a.distance - b.distance);
      const { chain: current } = pq.shift();
      if (current === destination) break;

      const neighbors = this.connectionGraph.get(current) || [];
      for (const conn of neighbors) {
        if (!conn.isActive) continue;
        const newDist = distances.get(current) + conn.fee;
        if (newDist < distances.get(conn.target)) {
          distances.set(conn.target, newDist);
          previous.set(conn.target, current);
          pq.push({ chain: conn.target, distance: newDist });
        }
      }
    }

    const path = [];
    let current = destination;
    while (current !== null) {
      path.unshift(current);
      current = previous.get(current);
    }

    if (path.length < 2) return null;

    let totalFee = 0;
    for (let i = 0; i < path.length - 1; i++) {
      const conns = this.connectionGraph.get(path[i]) || [];
      const conn = conns.find(c => c.target === path[i + 1]);
      if (conn) totalFee += conn.fee;
    }

    return {
      source,
      destination,
      hops: path,
      totalFee,
      estimatedTime: distances.get(destination),
      securityScore: Math.min(...path.map(c => this.chains[c].securityScore))
    };
  }

  async estimateCrossChainSwap(sourceChain, destChain, amount) {
    const route = this.findShortestPath(sourceChain, destChain);
    if (!route) throw new Error('No route found');

    const sourceProvider = this.providers[sourceChain];
    const destProvider = this.providers[destChain];

    const sourceGasPrice = await sourceProvider.getGasPrice();
    const destGasPrice = await destProvider.getGasPrice();

    return {
      route: route.hops.join(' -> '),
      totalFee: route.totalFee,
      estimatedTime: route.estimatedTime,
      sourceGasCost: ethers.utils.formatEther(sourceGasPrice.mul(21000)),
      destGasCost: ethers.utils.formatEther(destGasPrice.mul(21000)),
      securityScore: route.securityScore
    };
  }
}

const router = new CrossChainRouter({
  'ethereum': 'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY',
  'cosmos': 'https://rpc.cosmos.network',
  'solana': 'https://api.mainnet-beta.solana.com'
});
router.addChain('ethereum', 'Ethereum', { latency: 100, feePerTx: 0.01, tps: 15, securityScore: 95 });
router.addChain('cosmos', 'Cosmos Hub', { latency: 30, feePerTx: 0.001, tps: 1000, securityScore: 85 });
router.addChain('solana', 'Solana', { latency: 10, feePerTx: 0.0001, tps: 5000, securityScore: 75 });
router.addConnection('ethereum', 'cosmos', { fee: 0.005, latency: 50 });
router.addConnection('cosmos', 'solana', { fee: 0.002, latency: 20 });
const route = router.findShortestPath('ethereum', 'solana');
console.log('Route:', route.hops.join(' -> '));