@pod-protocol/sdk-js/dist/services/zkCompression.js

Pod Protocol SDK for JavaScript

'use strict';

var crypto = require('crypto');
var base = require('../base-B0PMFl1k.js');

/**
 * ZK Compression service for PoD Protocol using Light Protocol
 * Handles compressed account creation, batch operations, and proof generation
 * 
 * SECURITY NOTICE (AUD-2024-05): ZK Compression Service
 * This service integrates with Light Protocol for Zero-Knowledge compression.
 * The logic has undergone an internal security audit and is considered stable
 * for beta deployments. Additional external review is recommended prior to
 * production use.
 * 
 * KNOWN SECURITY CONSIDERATIONS:
 * - Proof forgery vulnerabilities in ZK verification
 * - Data integrity issues with IPFS storage
 * - Potential for state corruption between on-chain and off-chain data
 * - Batch processing complexities
 */


/**
 * ZK Compression configuration options
 */
class ZKCompressionConfig {
    constructor(options = {}) {
        this.lightRpcUrl = options.lightRpcUrl || process.env.LIGHT_RPC_URL;
        this.lightRpcEndpoint = options.lightRpcEndpoint || this.lightRpcUrl;
        this.compressionRpcUrl = options.compressionRpcUrl;
        this.proverUrl = options.proverUrl;
        this.photonIndexerUrl = options.photonIndexerUrl;
        this.maxBatchSize = options.maxBatchSize || 100;
        this.batchSize = options.batchSize || this.maxBatchSize;
        this.enableBatching = options.enableBatching !== undefined ? options.enableBatching : true;
        this.batchTimeout = options.batchTimeout || 5000;
        this.lightSystemProgram = options.lightSystemProgram;
        this.nullifierQueuePubkey = options.nullifierQueuePubkey;
        this.cpiAuthorityPda = options.cpiAuthorityPda;
        this.compressedTokenProgram = options.compressedTokenProgram;
        this.registeredProgramId = options.registeredProgramId;
        this.noopProgram = options.noopProgram;
        this.accountCompressionAuthority = options.accountCompressionAuthority;
        this.accountCompressionProgram = options.accountCompressionProgram;
        this.compressedTokenMint = options.compressedTokenMint;
    }
}

/**
 * Compressed account information
 */
class CompressedAccount {
    constructor(hash, data, merkleContext = null) {
        this.hash = hash;
        this.data = data;
        this.merkleContext = merkleContext;
    }
}

/**
 * Batch compression result
 */
class BatchCompressionResult {
    constructor(signature, compressedAccounts, merkleRoot) {
        this.signature = signature;
        this.compressedAccounts = compressedAccounts;
        this.merkleRoot = merkleRoot;
    }
}

/**
 * Compressed channel message data structure
 */
class CompressedChannelMessage {
    constructor(options) {
        this.channel = options.channel;
        this.sender = options.sender;
        this.contentHash = options.contentHash;
        this.ipfsHash = options.ipfsHash;
        this.messageType = options.messageType;
        this.createdAt = options.createdAt || Date.now();
        this.editedAt = options.editedAt;
        this.replyTo = options.replyTo;
    }
}

/**
 * Compressed channel participant data structure
 */
class CompressedChannelParticipant {
    constructor(options) {
        this.channel = options.channel;
        this.participant = options.participant;
        this.joinedAt = options.joinedAt || Date.now();
        this.messagesSent = options.messagesSent || 0;
        this.lastMessageAt = options.lastMessageAt || 0;
        this.metadataHash = options.metadataHash;
    }
}

/**
 * Batch sync operation
 */
class BatchSyncOperation {
    constructor(messageHashes, channelId, timestamp = Date.now()) {
        this.messageHashes = messageHashes;
        this.channelId = channelId;
        this.timestamp = timestamp;
    }
}

/**
 * ZK Compression Service for PoD Protocol
 * Handles compressed account creation, batch operations, and Light Protocol integration
 */
class ZKCompressionService extends base.BaseService {
    constructor(config, zkConfig = {}, ipfsService = null, wallet = null) {
        super(config);
        this.config = new ZKCompressionConfig(zkConfig);
        this.ipfsService = ipfsService;
        this.wallet = wallet;
        
        // Batch processing
        this.batchQueue = [];
        this.batchTimer = null;
        this.lastBatchResult = null;
        
        // Light Protocol configuration
        this.lightRpcUrl = this.config.lightRpcUrl || 
            'https://devnet.helius-rpc.com/?api-key=your-api-key';
    }

    /**
     * Compress a channel message and store content off-chain
     */
    async compressChannelMessage(channel, sender, content, messageType = 'text', replyTo = null) {
        try {
            let ipfsHash, contentHash;
            
            // Store content on IPFS
            if (this.ipfsService) {
                const ipfsResult = await this.ipfsService.storeMessageContent(content);
                ipfsHash = ipfsResult.hash;
                contentHash = this.ipfsService.constructor.createContentHash(content);
            } else {
                // Fallback to local hash
                contentHash = this._createLocalHash(content);
                ipfsHash = contentHash;
            }
            
            // Create compressed message data
            const compressedMessage = new CompressedChannelMessage({
                channel,
                sender,
                contentHash,
                ipfsHash,
                messageType,
                replyTo
            });
            
            // Create compressed account
            const compressedAccount = new CompressedAccount(
                contentHash,
                compressedMessage,
                null // Would be populated by Light Protocol
            );
            
            // Add to batch queue if batching is enabled
            if (this.config.enableBatching) {
                await this._addToBatch(compressedMessage);
            } else {
                // Process immediately
                await this._processSingleCompression(compressedAccount);
            }
            
            return compressedAccount;
            
        } catch (error) {
            throw new Error(`Failed to compress channel message: ${error.message}`);
        }
    }

    /**
     * Compress participant metadata and store off-chain
     */
    async compressParticipantMetadata(channel, participant, displayName, permissions = [], customData = {}) {
        try {
            let metadataHash;
            
            // Store metadata on IPFS
            if (this.ipfsService) {
                const ipfsResult = await this.ipfsService.storeParticipantMetadata(
                    displayName,
                    null, // avatar
                    permissions,
                    customData
                );
                metadataHash = ipfsResult.hash;
            } else {
                // Fallback to local hash
                const metadataObj = { displayName, permissions, customData };
                metadataHash = this._createLocalHash(JSON.stringify(metadataObj));
            }
            
            // Create compressed participant data
            const compressedParticipant = new CompressedChannelParticipant({
                channel,
                participant,
                metadataHash
            });
            
            // Create compressed account
            const compressedAccount = new CompressedAccount(
                metadataHash,
                compressedParticipant,
                null
            );
            
            return compressedAccount;
            
        } catch (error) {
            throw new Error(`Failed to compress participant metadata: ${error.message}`);
        }
    }

    /**
     * Perform batch compression of multiple messages
     */
    async batchCompressMessages(messages) {
        try {
            // Create compressed accounts for all messages
            const compressedAccounts = messages.map(message => 
                new CompressedAccount(
                    message.contentHash,
                    message,
                    null
                )
            );
            
            // Generate batch signature (mock)
            const batchData = JSON.stringify(compressedAccounts.map(acc => acc.data));
            const signature = this._createLocalHash(batchData);
            
            // Calculate merkle root (mock)
            const merkleRoot = this._calculateMockMerkleRoot(
                compressedAccounts.map(acc => acc.hash)
            );
            
            return new BatchCompressionResult(
                signature,
                compressedAccounts,
                merkleRoot
            );
            
        } catch (error) {
            throw new Error(`Failed to batch compress messages: ${error.message}`);
        }
    }

    /**
     * Decompress a message and retrieve its content
     */
    async decompressMessage(compressedHash) {
        try {
            // In a real implementation, this would query Light Protocol
            // For now, we'll try to retrieve from IPFS
            if (this.ipfsService) {
                const content = await this.ipfsService.retrieveMessageContent(compressedHash);
                return content;
            } else {
                throw new Error('Cannot decompress without IPFS service');
            }
            
        } catch (error) {
            throw new Error(`Failed to decompress message: ${error.message}`);
        }
    }

    /**
     * Get compressed accounts for a specific channel
     */
    async getCompressedAccountsByChannel(channel, limit = 50) {
        try {
            // In a real implementation, this would query Light Protocol indexer
            // For now, return empty array as mock
            return [];
            
        } catch (error) {
            throw new Error(`Failed to get compressed accounts: ${error.message}`);
        }
    }

    /**
     * Verify a ZK compression proof
     */
    async verifyCompressionProof(proof, publicInputs) {
        try {
            // In a real implementation, this would verify against Light Protocol
            // For now, return true as mock
            return true;
            
        } catch (error) {
            throw new Error(`Failed to verify compression proof: ${error.message}`);
        }
    }

    /**
     * Synchronize batch operations with the network
     */
    async syncBatchOperations(operations) {
        try {
            // Process each operation
            const results = operations.map(operation => ({
                channelId: operation.channelId,
                messageCount: operation.messageHashes.length,
                timestamp: operation.timestamp,
                status: 'synced'
            }));
            
            return {
                operationsSynced: results.length,
                results,
                syncTimestamp: Date.now()
            };
            
        } catch (error) {
            throw new Error(`Failed to sync batch operations: ${error.message}`);
        }
    }

    /**
     * Get compression statistics
     */
    async getCompressionStats() {
        try {
            return {
                totalCompressedMessages: 0, // Mock
                totalCompressedParticipants: 0, // Mock
                batchQueueSize: this.batchQueue.length,
                lastBatchTimestamp: this.lastBatchResult?.timestamp || null,
                compressionRatio: 0.85, // Mock compression ratio
                storageSavedBytes: 0 // Mock
            };
            
        } catch (error) {
            throw new Error(`Failed to get compression stats: ${error.message}`);
        }
    }

    // Private Methods

    async _addToBatch(message) {
        this.batchQueue.push(message);
        
        // Check if batch is full
        const maxBatchSize = this.config.batchSize || this.config.maxBatchSize;
        if (this.batchQueue.length >= maxBatchSize) {
            await this._processBatch();
        } else if (!this.batchTimer) {
            // Start batch timer
            this._startBatchTimer();
        }
    }

    _startBatchTimer() {
        this.batchTimer = setTimeout(async () => {
            if (this.batchQueue.length > 0) {
                await this._processBatch();
            }
        }, this.config.batchTimeout);
    }

    async _processBatch() {
        if (this.batchQueue.length === 0) return;
        
        try {
            const batchResult = await this.batchCompressMessages(this.batchQueue);
            this.lastBatchResult = {
                signature: batchResult.signature,
                compressedAccounts: batchResult.compressedAccounts.map(acc => ({
                    hash: acc.hash,
                    data: acc.data
                })),
                timestamp: Date.now()
            };
            
            // Clear the queue
            this.batchQueue = [];
            this.batchTimer = null;
            
        } catch (error) {
            console.error('Batch processing failed:', error.message);
        }
    }

    async _processSingleCompression(account) {
        // In a real implementation, this would submit to Light Protocol
        // For now, just log the operation
        console.log('Processing single compression:', account.hash);
    }

    _createLocalHash(data) {
        return crypto.createHash('sha256').update(data).digest('hex');
    }

    _calculateMockMerkleRoot(hashes) {
        if (hashes.length === 0) return '0'.repeat(64);
        
        // Simple concatenation hash for mock
        const combined = hashes.sort().join('');
        return crypto.createHash('sha256').update(combined).digest('hex');
    }

    /**
     * Cleanup resources and process remaining batches
     */
    async cleanup() {
        if (this.batchTimer) {
            clearTimeout(this.batchTimer);
            this.batchTimer = null;
        }
        
        if (this.batchQueue.length > 0) {
            await this._processBatch();
        }
    }
}

exports.BatchCompressionResult = BatchCompressionResult;
exports.BatchSyncOperation = BatchSyncOperation;
exports.CompressedAccount = CompressedAccount;
exports.CompressedChannelMessage = CompressedChannelMessage;
exports.CompressedChannelParticipant = CompressedChannelParticipant;
exports.ZKCompressionConfig = ZKCompressionConfig;
exports.ZKCompressionService = ZKCompressionService;
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