# NimPak Remote Repository and Binary Cache Specification ## Overview The NimPak Remote Repository and Binary Cache system enables distributed package distribution with cryptographic verification, efficient synchronization, and intelligent binary cache selection. This system builds on the security foundation to provide lightning-fast installs with military-grade integrity guarantees. ## Architecture ``` ┌─────────────────────────────────────────────────────────────┐ │ Remote Repository Network │ ├─────────────────────────────────────────────────────────────┤ │ ┌─────────────────┐ ┌─────────────────┐ ┌──────────────┐ │ │ │ Repository │ │ Binary Cache │ │ Mirror │ │ │ │ Server │ │ Server │ │ Network │ │ │ │ │ │ │ │ │ │ │ │ • Metadata │ │ • Binary Store │ │ • Sync │ │ │ │ • Manifests │ │ • Compatibility │ │ • Replicate │ │ │ │ • Signatures │ │ • Auto-select │ │ • Load Bal │ │ │ │ • Trust Scores │ │ • Verification │ │ • Failover │ │ │ └─────────────────┘ └─────────────────┘ └──────────────┘ │ ├─────────────────────────────────────────────────────────────┤ │ ┌─────────────────┐ ┌─────────────────┐ ┌──────────────┐ │ │ │ Remote Manager │ │ Cache Manager │ │ Sync Engine │ │ │ │ │ │ │ │ │ │ │ │ • Fetch/Push │ │ • Hit/Miss │ │ • Delta Sync │ │ │ │ • Auth/Trust │ │ • Compatibility │ │ • Bloom Filt │ │ │ │ • Retry Logic │ │ • Eviction │ │ • Bandwidth │ │ │ │ • Load Balance │ │ • Statistics │ │ • Integrity │ │ │ └─────────────────┘ └─────────────────┘ └──────────────┘ │ └─────────────────────────────────────────────────────────────┘ ``` ## Core Components ### 1. Repository Server The repository server hosts package metadata, manifests, and trust information. **Features:** - **Signed Manifests**: All metadata cryptographically signed with Ed25519 - **Trust Propagation**: Cross-repository trust score sharing - **Delta Uploads**: Efficient CAS-based synchronization - **Policy Enforcement**: Server-side trust policy validation - **Audit Trails**: Complete operation logging for compliance **API Endpoints:** ``` GET /api/v1/packages # List packages GET /api/v1/packages/{name} # Package metadata GET /api/v1/packages/{name}/{version} # Version-specific data GET /api/v1/manifests/{hash} # Package manifest POST /api/v1/packages # Upload package PUT /api/v1/trust/{actor} # Update trust score GET /api/v1/sync/changes # Incremental sync ``` ### 2. Binary Cache Server The binary cache server provides pre-compiled binaries with compatibility matching. **Features:** - **Compatibility Detection**: CPU flags, libc, allocator, architecture - **Automatic Selection**: Best binary match for target system - **Fallback Logic**: Source build when no compatible binary exists - **Verification**: Every binary cryptographically verified - **Statistics**: Cache hit rates and performance metrics **Cache Key Format:** ``` {package}-{version}-{arch}-{libc}-{allocator}-{cpu_flags}-{build_hash} ``` ### 3. Mirror Network The mirror network provides global distribution with intelligent routing. **Features:** - **Geographic Distribution**: Mirrors in multiple regions - **Load Balancing**: Intelligent routing based on latency and load - **Failover**: Automatic failover to healthy mirrors - **Synchronization**: Real-time sync with integrity verification - **Bandwidth Optimization**: Delta sync and compression ## Protocol Specifications ### 1. Repository Manifest Format ```kdl repository_manifest { version "1.0" repository_id "nexusos-stable" timestamp "2025-01-15T10:30:00Z" signature { algorithm "ed25519" key_id "nexusos-repo-2025" signature "base64-encoded-signature" } packages { htop { version "3.2.2" hash "blake3-abc123..." trust_score 0.95 binaries { x86_64_musl_jemalloc "blake3-binary1..." x86_64_glibc_default "blake3-binary2..." } } } trust_policies { minimum_score 0.7 require_signatures true allowed_sources "original" "grafted" } } ``` ### 2. Binary Cache Metadata ```kdl binary_cache_entry { package_id "htop" version "3.2.2" build_hash "blake3-build456..." compatibility { architecture "x86_64" libc "musl-1.2.4" allocator "jemalloc-5.3.0" cpu_features "sse4.2" "avx2" abi_version "1.0" } binary { hash "blake3-binary789..." size 2048576 compression "zstd" signature { algorithm "ed25519" key_id "build-farm-2025" signature "base64-signature" } } build_info { builder "nexusos-build-farm-01" build_time "2025-01-15T08:00:00Z" compiler_version "nim-2.0.0" build_flags "--opt:speed" "--cpu:native" } } ``` ### 3. Sync Protocol ```kdl sync_request { client_id "nimpak-client-uuid" last_sync "2025-01-15T09:00:00Z" bloom_filter "base64-encoded-bloom" capabilities { delta_sync true compression "zstd" max_bandwidth "10MB/s" } } sync_response { changes { added { htop "3.2.3" "blake3-new..." } updated { vim "9.0.3" "blake3-updated..." } removed { old_package "1.0.0" } } delta_objects { "blake3-delta1..." { base "blake3-base..." patch "base64-patch..." } } next_sync_token "sync-token-123" } ``` ## Implementation Plan ### Phase 1: Core Remote Manager **Files to Create:** - `src/nimpak/remote/manager.nim` - Core remote repository management - `src/nimpak/remote/client.nim` - HTTP client with retry logic - `src/nimpak/remote/auth.nim` - Authentication and authorization - `src/nimpak/remote/manifest.nim` - Manifest parsing and validation **Key Functions:** ```nim proc addRepository*(url: string, keyId: string): RemoteResult[Repository] proc fetchPackageList*(repo: Repository): RemoteResult[seq[PackageInfo]] proc downloadPackage*(repo: Repository, packageId: string, version: string): RemoteResult[PackageData] proc uploadPackage*(repo: Repository, package: PackageData): RemoteResult[UploadResult] proc verifyRepositorySignature*(manifest: RepositoryManifest): RemoteResult[bool] ``` ### Phase 2: Binary Cache System **Files to Create:** - `src/nimpak/cache/manager.nim` - Binary cache management - `src/nimpak/cache/compatibility.nim` - Binary compatibility detection - `src/nimpak/cache/selection.nim` - Optimal binary selection - `src/nimpak/cache/statistics.nim` - Cache performance metrics **Key Functions:** ```nim proc findCompatibleBinary*(packageId: string, version: string, targetSystem: SystemInfo): CacheResult[BinaryInfo] proc cacheBinary*(binary: BinaryData, metadata: BinaryMetadata): CacheResult[CacheKey] proc getCacheStatistics*(): CacheStatistics proc evictOldBinaries*(policy: EvictionPolicy): CacheResult[int] ``` ### Phase 3: Synchronization Engine **Files to Create:** - `src/nimpak/sync/engine.nim` - Synchronization engine - `src/nimpak/sync/delta.nim` - Delta synchronization - `src/nimpak/sync/bloom.nim` - Bloom filter implementation - `src/nimpak/sync/bandwidth.nim` - Bandwidth management **Key Functions:** ```nim proc syncRepository*(repo: Repository, lastSync: DateTime): SyncResult[SyncSummary] proc createDeltaSync*(source: CASObject, target: CASObject): SyncResult[DeltaPatch] proc applyDeltaSync*(base: CASObject, patch: DeltaPatch): SyncResult[CASObject] proc optimizeBandwidth*(transfers: seq[Transfer], maxBandwidth: int): seq[Transfer] ``` ### Phase 4: CLI Integration **Enhanced Commands:** ```bash # Repository management nip repo add [--key-id ] nip repo list nip repo remove nip repo sync [--repo ] # Package operations with remote support nip install [--repo ] [--prefer-binary] nip search [--repo ] nip publish [--repo ] # Cache management nip cache status nip cache clean [--max-size ] nip cache stats # Mirror management nip mirror add nip mirror list nip mirror sync ``` ## Security Integration ### 1. Trust Verification Every remote operation integrates with the trust system: ```nim proc verifyRemotePackage*(package: RemotePackage): TrustResult = # 1. Verify repository signature let repoTrust = verifyRepositorySignature(package.repository.manifest) # 2. Verify package signature let packageTrust = verifyPackageSignature(package.signature) # 3. Check trust policy let policyResult = evaluatePackageTrust(trustManager, package.provenance) # 4. Calculate combined trust score return combineTrustResults(repoTrust, packageTrust, policyResult) ``` ### 2. Secure Communication All network communication uses TLS with certificate pinning: ```nim proc createSecureClient*(repo: Repository): HttpClient = var client = newHttpClient() client.sslContext = newContext(verifyMode = CVerifyPeer) # Pin repository certificate if repo.certificatePin.isSome(): client.sslContext.pinCertificate(repo.certificatePin.get()) return client ``` ### 3. Integrity Verification Every downloaded object is verified: ```nim proc downloadWithVerification*(url: string, expectedHash: string): DownloadResult[seq[byte]] = let data = await httpClient.downloadData(url) # Verify hash let actualHash = computeHash(data, HashBlake3) if actualHash != expectedHash: return error("Hash verification failed") # Log security event logGlobalSecurityEvent(EventPackageVerification, SeverityInfo, "remote-download", fmt"Package downloaded and verified: {url}") return success(data) ``` ## Performance Optimizations ### 1. Parallel Downloads ```nim proc downloadPackagesParallel*(packages: seq[PackageRequest]): seq[DownloadResult] = var futures: seq[Future[DownloadResult]] = @[] for package in packages: futures.add(downloadPackageAsync(package)) return waitFor all(futures) ``` ### 2. Compression and Caching ```nim proc downloadWithCompression*(url: string): DownloadResult[seq[byte]] = var client = newHttpClient() client.headers["Accept-Encoding"] = "zstd, gzip" let response = await client.get(url) let data = decompressData(response.body, response.headers["Content-Encoding"]) return success(data) ``` ### 3. Bandwidth Management ```nim proc manageBandwidth*(transfers: var seq[Transfer], maxBandwidth: int) = var currentBandwidth = 0 for transfer in transfers.mitems: if currentBandwidth + transfer.estimatedBandwidth <= maxBandwidth: transfer.start() currentBandwidth += transfer.estimatedBandwidth else: transfer.queue() ``` ## Configuration ### Repository Configuration (`nip-repositories.kdl`) ```kdl repositories { version "1.0" nexusos_stable { url "https://packages.nexusos.org/stable" key_id "nexusos-stable-2025" priority 100 enabled true trust_policy { minimum_score 0.8 require_signatures true allow_grafted false } cache { enabled true max_size "10GB" ttl 86400 # 24 hours } } community { url "https://community.nexusos.org/packages" key_id "nexusos-community-2025" priority 50 enabled true trust_policy { minimum_score 0.6 require_signatures false allow_grafted true } } } ``` ### Cache Configuration (`nip-cache.kdl`) ```kdl cache { version "1.0" binary_cache { enabled true location "/var/cache/nimpak/binaries" max_size "50GB" eviction_policy { strategy "lru" # lru, lfu, size check_interval 3600 # 1 hour min_free_space "5GB" } compatibility { strict_matching false allow_fallback true prefer_native true } } source_cache { enabled true location "/var/cache/nimpak/sources" max_size "10GB" ttl 604800 # 1 week } } ``` ## Monitoring and Metrics ### Performance Metrics ```nim type RemoteMetrics* = object downloadCount*: int64 downloadBytes*: int64 downloadTime*: float cacheHitRate*: float averageLatency*: float errorRate*: float CacheMetrics* = object hitCount*: int64 missCount*: int64 evictionCount*: int64 storageUsed*: int64 storageLimit*: int64 ``` ### Health Checks ```nim proc checkRepositoryHealth*(repo: Repository): HealthResult = # Check connectivity let pingResult = pingRepository(repo) if not pingResult.success: return unhealthy("Repository unreachable") # Check certificate validity let certResult = verifyCertificate(repo) if not certResult.valid: return unhealthy("Invalid certificate") # Check trust status let trustResult = verifyRepositoryTrust(repo) if trustResult.score < 0.5: return warning("Low trust score") return healthy("Repository operational") ``` ## Future Enhancements ### 1. Content Delivery Network (CDN) - **Global Distribution**: CDN integration for worldwide package distribution - **Edge Caching**: Cache popular packages at edge locations - **Intelligent Routing**: Route requests to nearest healthy edge ### 2. Peer-to-Peer Distribution - **P2P Protocol**: BitTorrent-like protocol for package distribution - **Swarm Intelligence**: Coordinate downloads across multiple peers - **Bandwidth Sharing**: Share bandwidth costs across community ### 3. Advanced Caching - **Predictive Caching**: ML-based prediction of package needs - **Collaborative Filtering**: Share cache decisions across similar systems - **Adaptive Policies**: Dynamic cache policies based on usage patterns --- This specification provides the foundation for a world-class distributed package distribution system that builds on NimPak's security foundation to deliver lightning-fast, verified package installations with military-grade integrity guarantees.