《橡皮头》与变异NFT：畸形作为链上稀缺性

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract MutantNFT is ERC721, Ownable {
    struct Mutant {
        uint256 id;
        string name;
        uint256 mutationLevel;
        uint256 rarityScore;
        string[] traits;
        uint256[] traitValues;
        address creator;
        uint256 generation;
        uint256 mutations;
        bool isMutated;
    }
    
    struct Mutation {
        uint256 mutationId;
        uint256 parentId;
        uint256 childId;
        string mutationType;
        uint256 timestamp;
    }
    
    mapping(uint256 => Mutant) public mutants;
    mapping(uint256 => Mutation[]) public mutationHistory;
    mapping(uint256 => uint256[]) public mutantChildren;
    
    uint256 public mutantCount;
    uint256 public mutationCount;
    uint256 public constant MAX_MUTATIONS = 3;
    
    event MutantCreated(uint256 indexed id, string name, uint256 rarityScore);
    event MutantMutated(uint256 indexed parentId, uint256 indexed childId, string mutationType);
    
    constructor() ERC721("MutantNFT", "MNFT") {}
    
    function createMutant(
        string memory _name,
        uint256 _mutationLevel,
        string[] memory _traits,
        uint256[] memory _traitValues
    ) external returns (uint256) {
        require(_traits.length == _traitValues.length, "Arrays length mismatch");
        require(_mutationLevel <= MAX_MUTATIONS, "Max mutation level exceeded");
        
        mutantCount++;
        uint256 rarityScore = calculateRarity(_mutationLevel, _traitValues);
        
        mutants[mutantCount] = Mutant({
            id: mutantCount,
            name: _name,
            mutationLevel: _mutationLevel,
            rarityScore: rarityScore,
            traits: _traits,
            traitValues: _traitValues,
            creator: msg.sender,
            generation: 1,
            mutations: 0,
            isMutated: false
        });
        
        _safeMint(msg.sender, mutantCount);
        emit MutantCreated(mutantCount, _name, rarityScore);
        return mutantCount;
    }
    
    function mutate(uint256 _parentId, string memory _mutationType) external returns (uint256) {
        Mutant storage parent = mutants[_parentId];
        require(parent.mutations < MAX_MUTATIONS, "Max mutations reached");
        require(ownerOf(_parentId) == msg.sender, "Not the owner");
        
        mutationCount++;
        mutantCount++;
        
        // 子代继承父代的特征，但发生变异
        string[] memory childTraits = new string[](parent.traits.length);
        uint256[] memory childValues = new uint256[](parent.traitValues.length);
        
        for (uint256 i = 0; i < parent.traits.length; i++) {
            childTraits[i] = parent.traits[i];
            childValues[i] = parent.traitValues[i] + uint256(keccak256(abi.encodePacked(_mutationType, i))) % 10;
        }
        
        uint256 rarityScore = calculateRarity(parent.mutationLevel + 1, childValues);
        
        mutants[mutantCount] = Mutant({
            id: mutantCount,
            name: string(abi.encodePacked(parent.name, "_mutated_", mutationCount)),
            mutationLevel: parent.mutationLevel + 1,
            rarityScore: rarityScore,
            traits: childTraits,
            traitValues: childValues,
            creator: msg.sender,
            generation: parent.generation + 1,
            mutations: parent.mutations + 1,
            isMutated: true
        });
        
        mutationHistory[mutantCount].push(Mutation({
            mutationId: mutationCount,
            parentId: _parentId,
            childId: mutantCount,
            mutationType: _mutationType,
            timestamp: block.timestamp
        }));
        
        mutantChildren[_parentId].push(mutantCount);
        parent.mutations++;
        
        _safeMint(msg.sender, mutantCount);
        emit MutantMutated(_parentId, mutantCount, _mutationType);
        return mutantCount;
    }
    
    function calculateRarity(uint256 _mutationLevel, uint256[] memory _values) internal pure returns (uint256) {
        uint256 rarity = _mutationLevel * 100;
        for (uint256 i = 0; i < _values.length; i++) {
            rarity += _values[i];
        }
        return rarity;
    }
    
    function getMutantInfo(uint256 _id) external view returns (Mutant memory) {
        return mutants[_id];
    }
    
    function getChildren(uint256 _parentId) external view returns (uint256[] memory) {
        return mutantChildren[_parentId];
    }
}

import numpy as np
import pandas as pd
from typing import Dict, List
import matplotlib.pyplot as plt

class MutantAnalyzer:
    def __init__(self):
        self.mutants = []
        
    def generate_synthetic_data(self, n: int = 200):
        np.random.seed(42)
        
        for i in range(n):
            mutant = {
                'id': i + 1,
                'mutation_level': np.random.randint(0, 4),
                'rarity_score': np.random.uniform(50, 500),
                'traits_count': np.random.randint(3, 8),
                'children_count': np.random.randint(0, 5),
                'generation': np.random.randint(1, 5),
                'price': np.random.exponential(10)
            }
            self.mutants.append(mutant)
    
    def analyze_rarity_distribution(self) -> Dict:
        df = pd.DataFrame(self.mutants)
        return {
            'total_mutants': len(self.mutants),
            'avg_rarity': df['rarity_score'].mean(),
            'max_rarity': df['rarity_score'].max(),
            'mutation_distribution': df['mutation_level'].value_counts().to_dict(),
            'price_correlation': df['rarity_score'].corr(df['price'])
        }
    
    def generate_report(self) -> str:
        eff = self.analyze_rarity_distribution()
        report = f"""
=== 变异NFT分析 ===

总变异体: {eff['total_mutants']}
平均稀有度: {eff['avg_rarity']:.1f}
最高稀有度: {eff['max_rarity']:.1f}
稀有度-价格相关性: {eff['price_correlation']:.2f}
变异等级分布: {eff['mutation_distribution']}
"""
        return report


if __name__ == "__main__":
    analyzer = MutantAnalyzer()
    analyzer.generate_synthetic_data(200)
    report = analyzer.generate_report()
    print(report)

class MutantNFTManager {
    constructor(providerUrl, contractAddress) {
        this.web3 = new Web3(providerUrl);
        this.contract = new this.web3.eth.Contract([], contractAddress);
    }
    
    async createMutant(name, mutationLevel, traits, traitValues) {
        return await this.contract.methods
            .createMutant(name, mutationLevel, traits, traitValues)
            .send({ from: this.userAccount });
    }
    
    async mutate(parentId, mutationType) {
        return await this.contract.methods
            .mutate(parentId, mutationType)
            .send({ from: this.userAccount });
    }
    
    async getMutantInfo(id) {
        return await this.contract.methods.getMutantInfo(id).call();
    }
}

const manager = new MutantNFTManager('https://mainnet.infura.io/v3/YOUR_ID', '0x...');