《美国往事》与记忆存储：时光作为链上数据的永久性

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

contract PermanentMemory {
    struct Memory {
        bytes32 memoryHash;
        address creator;
        string title;
        string description;
        uint256 timestamp;
        bool immortalized;
        uint256 storageFee;
    }

    mapping(bytes32 => Memory) public memories;
    mapping(address => bytes32[]) public creatorMemories;
    uint256 public constant STORAGE_FEE = 0.1 ether;

    event MemoryImmortalized(bytes32 hash, address creator, string title);

    function immortalize(bytes32 hash, string calldata title, 
                         string calldata description) external payable {
        require(msg.value >= STORAGE_FEE, "Insufficient fee");
        memories[hash] = Memory({
            memoryHash: hash,
            creator: msg.sender,
            title: title,
            description: description,
            timestamp: block.timestamp,
            immortalized: true,
            storageFee: msg.value
        });
        creatorMemories[msg.sender].push(hash);
        emit MemoryImmortalized(hash, msg.sender, title);
    }

    function recall(bytes32 hash) external view returns (Memory memory) {
        require(memories[hash].immortalized, "Memory not found");
        return memories[hash];
    }
}

import json
import random
from typing import Dict
from datetime import datetime

class MemoryAnalyzer:
    def analyze_storage_permanence(self, data_size: int, years: int) -> Dict:
        cost_per_year = 0.1 * data_size
        total_cost = cost_per_year * years
        return {
            'data_size_gb': data_size,
            'years': years,
            'cost_per_year': cost_per_year,
            'total_cost': total_cost,
            'permanence_guarantee': True
        }


analyzer = MemoryAnalyzer()
result = analyzer.analyze_storage_permanence(10, 100)
print(json.dumps(result, indent=2))

const express = require('express');
const { ethers } = require('ethers');
const app = express();
app.use(express.json());

const MEMORY_ABI = [
    "function immortalize(bytes32 hash, string title, string description) external payable",
    "function recall(bytes32 hash) external view returns (tuple)",
    "event MemoryImmortalized(bytes32 hash, address creator, string title)"
];

class PermanentMemoryManager {
    constructor(providerUrl, contractAddress) {
        this.provider = new ethers.providers.JsonRpcProvider(providerUrl);
        this.contract = new ethers.Contract(contractAddress, MEMORY_ABI, this.provider);
    }

    async immortalize(privateKey, hash, title, description) {
        const wallet = new ethers.Wallet(privateKey, this.provider);
        const contract = this.contract.connect(wallet);
        const tx = await contract.immortalize(hash, title, description, 
            { value: ethers.utils.parseEther('0.1') });
        return await tx.wait();
    }
}

app.post('/api/memory/immortalize', async (req, res) => {
    const { privateKey, hash, title, description } = req.body;
    const manager = new PermanentMemoryManager(process.env.RPC_URL, process.env.MEMORY_ADDRESS);
    const receipt = await manager.immortalize(privateKey, hash, title, description);
    res.json(receipt);
});

app.listen(3024, () => {
    console.log('Permanent Memory API running on port 3024');
});