1304 lines
56 KiB
Swift
1304 lines
56 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import Combine
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import Sodium
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import GRDB
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import SessionUtilitiesKit
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public final class SnodeAPI {
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public typealias TargetedMessage = (message: SnodeMessage, namespace: Namespace)
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internal static let sodium: Atomic<Sodium> = Atomic(Sodium())
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private static var hasLoadedSnodePool: Atomic<Bool> = Atomic(false)
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private static var loadedSwarms: Atomic<Set<String>> = Atomic([])
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private static var getSnodePoolPublisher: Atomic<AnyPublisher<Set<Snode>, Error>?> = Atomic(nil)
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/// - Note: Should only be accessed from `Threading.workQueue` to avoid race conditions.
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internal static var snodeFailureCount: Atomic<[Snode: UInt]> = Atomic([:])
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/// - Note: Should only be accessed from `Threading.workQueue` to avoid race conditions.
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internal static var snodePool: Atomic<Set<Snode>> = Atomic([])
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/// The offset between the user's clock and the Service Node's clock. Used in cases where the
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/// user's clock is incorrect.
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///
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/// - Note: Should only be accessed from `Threading.workQueue` to avoid race conditions.
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public static var clockOffset: Atomic<Int64> = Atomic(0)
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/// - Note: Should only be accessed from `Threading.workQueue` to avoid race conditions.
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public static var swarmCache: Atomic<[String: Set<Snode>]> = Atomic([:])
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// MARK: - Hardfork version
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public static var hardfork = UserDefaults.standard[.hardfork]
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public static var softfork = UserDefaults.standard[.softfork]
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// MARK: - Settings
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private static let maxRetryCount: Int = 8
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private static let minSwarmSnodeCount: Int = 3
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private static let seedNodePool: Set<String> = {
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guard !Features.useTestnet else {
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return [ "http://public.loki.foundation:38157" ]
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}
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return [
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"https://storage.seed1.loki.network:4433",
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"https://storage.seed3.loki.network:4433",
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"https://public.loki.foundation:4433"
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]
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}()
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private static let snodeFailureThreshold: Int = 3
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private static let minSnodePoolCount: Int = 12
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private static func offsetTimestampMsNow() -> UInt64 {
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return UInt64(
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Int64(floor(Date().timeIntervalSince1970 * 1000)) +
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SnodeAPI.clockOffset.wrappedValue
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)
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}
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// MARK: Snode Pool Interaction
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private static var hasInsufficientSnodes: Bool { snodePool.wrappedValue.count < minSnodePoolCount }
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private static func loadSnodePoolIfNeeded() {
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guard !hasLoadedSnodePool.wrappedValue else { return }
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let fetchedSnodePool: Set<Snode> = Storage.shared
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.read { db in try Snode.fetchSet(db) }
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.defaulting(to: [])
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snodePool.mutate { $0 = fetchedSnodePool }
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hasLoadedSnodePool.mutate { $0 = true }
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}
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private static func setSnodePool(to newValue: Set<Snode>, db: Database? = nil) {
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snodePool.mutate { $0 = newValue }
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if let db: Database = db {
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_ = try? Snode.deleteAll(db)
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newValue.forEach { try? $0.save(db) }
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}
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else {
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Storage.shared.write { db in
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_ = try? Snode.deleteAll(db)
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newValue.forEach { try? $0.save(db) }
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}
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}
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}
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private static func dropSnodeFromSnodePool(_ snode: Snode) {
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var snodePool = SnodeAPI.snodePool.wrappedValue
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snodePool.remove(snode)
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setSnodePool(to: snodePool)
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}
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@objc public static func clearSnodePool() {
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snodePool.mutate { $0.removeAll() }
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Threading.workQueue.async {
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setSnodePool(to: [])
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}
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}
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// MARK: - Swarm Interaction
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private static func loadSwarmIfNeeded(for publicKey: String) {
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guard !loadedSwarms.wrappedValue.contains(publicKey) else { return }
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let updatedCacheForKey: Set<Snode> = Storage.shared
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.read { db in try Snode.fetchSet(db, publicKey: publicKey) }
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.defaulting(to: [])
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swarmCache.mutate { $0[publicKey] = updatedCacheForKey }
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loadedSwarms.mutate { $0.insert(publicKey) }
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}
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private static func setSwarm(to newValue: Set<Snode>, for publicKey: String, persist: Bool = true) {
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swarmCache.mutate { $0[publicKey] = newValue }
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guard persist else { return }
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Storage.shared.write { db in
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try? newValue.save(db, key: publicKey)
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}
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}
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public static func dropSnodeFromSwarmIfNeeded(_ snode: Snode, publicKey: String) {
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let swarmOrNil = swarmCache.wrappedValue[publicKey]
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guard var swarm = swarmOrNil, let index = swarm.firstIndex(of: snode) else { return }
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swarm.remove(at: index)
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setSwarm(to: swarm, for: publicKey)
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}
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// MARK: - Public API
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public static func hasCachedSnodesInclusingExpired() -> Bool {
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loadSnodePoolIfNeeded()
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return !hasInsufficientSnodes
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}
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public static func getSnodePool() -> AnyPublisher<Set<Snode>, Error> {
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loadSnodePoolIfNeeded()
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let now: Date = Date()
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let hasSnodePoolExpired: Bool = given(Storage.shared[.lastSnodePoolRefreshDate]) {
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now.timeIntervalSince($0) > 2 * 60 * 60
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}.defaulting(to: true)
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let snodePool: Set<Snode> = SnodeAPI.snodePool.wrappedValue
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guard hasInsufficientSnodes || hasSnodePoolExpired else {
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return Just(snodePool)
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.setFailureType(to: Error.self)
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.eraseToAnyPublisher()
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}
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if let getSnodePoolPublisher: AnyPublisher<Set<Snode>, Error> = getSnodePoolPublisher.wrappedValue {
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return getSnodePoolPublisher
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}
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let publisher: AnyPublisher<Set<Snode>, Error>
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if snodePool.count < minSnodePoolCount {
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publisher = getSnodePoolFromSeedNode()
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}
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else {
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publisher = getSnodePoolFromSnode()
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.catch { _ in getSnodePoolFromSeedNode() }
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.eraseToAnyPublisher()
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}
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getSnodePoolPublisher.mutate { $0 = publisher }
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return publisher
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.flatMap { snodePool -> AnyPublisher<Set<Snode>, Error> in
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guard !snodePool.isEmpty else {
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return Fail(error: SnodeAPIError.snodePoolUpdatingFailed)
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.eraseToAnyPublisher()
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}
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return Storage.shared
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.writePublisher { db in
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db[.lastSnodePoolRefreshDate] = now
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setSnodePool(to: snodePool, db: db)
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return snodePool
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}
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.eraseToAnyPublisher()
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}
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.handleEvents(
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receiveCompletion: { _ in getSnodePoolPublisher.mutate { $0 = nil } }
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)
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.eraseToAnyPublisher()
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}
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public static func getSessionID(for onsName: String) -> AnyPublisher<String, Error> {
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let validationCount = 3
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// The name must be lowercased
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let onsName = onsName.lowercased()
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// Hash the ONS name using BLAKE2b
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let nameAsData = [UInt8](onsName.data(using: String.Encoding.utf8)!)
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guard let nameHash = sodium.wrappedValue.genericHash.hash(message: nameAsData) else {
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return Fail(error: SnodeAPIError.hashingFailed)
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.eraseToAnyPublisher()
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}
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// Ask 3 different snodes for the Session ID associated with the given name hash
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let base64EncodedNameHash = nameHash.toBase64()
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return Publishers
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.MergeMany(
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(0..<validationCount)
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.map { _ in
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SnodeAPI
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.getRandomSnode()
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.flatMap { snode -> AnyPublisher<String, Error> in
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SnodeAPI
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.send(
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request: SnodeRequest(
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endpoint: .oxenDaemonRPCCall,
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body: OxenDaemonRPCRequest(
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endpoint: .daemonOnsResolve,
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body: ONSResolveRequest(
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type: 0, // type 0 means Session
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base64EncodedNameHash: base64EncodedNameHash
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)
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)
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),
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to: snode,
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associatedWith: nil
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)
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.decoded(as: ONSResolveResponse.self)
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.flatMap { _, response -> AnyPublisher<String, Error> in
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do {
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let result: String = try response.sessionId(
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sodium: sodium.wrappedValue,
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nameBytes: nameAsData,
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nameHashBytes: nameHash
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)
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return Just(result)
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.setFailureType(to: Error.self)
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.eraseToAnyPublisher()
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}
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catch {
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return Fail(error: error)
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.eraseToAnyPublisher()
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}
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}
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.retry(4)
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.eraseToAnyPublisher()
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}
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}
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)
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.subscribe(on: Threading.workQueue)
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.collect()
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.flatMap { results -> AnyPublisher<String, Error> in
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guard results.count == validationCount, Set(results).count == 1 else {
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return Fail(error: SnodeAPIError.validationFailed)
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.eraseToAnyPublisher()
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}
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return Just(results[0])
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.setFailureType(to: Error.self)
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.eraseToAnyPublisher()
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}
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.eraseToAnyPublisher()
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}
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public static func getSwarm(
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for publicKey: String,
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using dependencies: SSKDependencies = SSKDependencies()
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) -> AnyPublisher<Set<Snode>, Error> {
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loadSwarmIfNeeded(for: publicKey)
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if let cachedSwarm = swarmCache.wrappedValue[publicKey], cachedSwarm.count >= minSwarmSnodeCount {
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return Just(cachedSwarm)
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.setFailureType(to: Error.self)
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.eraseToAnyPublisher()
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}
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SNLog("Getting swarm for: \((publicKey == getUserHexEncodedPublicKey()) ? "self" : publicKey).")
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let targetPublicKey: String = (Features.useTestnet ?
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publicKey.removingIdPrefixIfNeeded() :
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publicKey
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)
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return getRandomSnode()
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.flatMap { snode in
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SnodeAPI.send(
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request: SnodeRequest(
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endpoint: .getSwarm,
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body: GetSwarmRequest(pubkey: targetPublicKey)
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),
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to: snode,
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associatedWith: publicKey,
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using: dependencies
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)
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.retry(4)
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.eraseToAnyPublisher()
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}
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.map { _, responseData in parseSnodes(from: responseData) }
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.handleEvents(
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receiveOutput: { swarm in setSwarm(to: swarm, for: publicKey) }
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)
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.eraseToAnyPublisher()
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}
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// MARK: - Retrieve
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public static func getMessages(
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in namespaces: [SnodeAPI.Namespace],
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from snode: Snode,
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associatedWith publicKey: String,
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using dependencies: SSKDependencies = SSKDependencies()
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) -> AnyPublisher<[SnodeAPI.Namespace: (info: ResponseInfoType, data: (messages: [SnodeReceivedMessage], lastHash: String?)?)], Error> {
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let targetPublicKey: String = (Features.useTestnet ?
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publicKey.removingIdPrefixIfNeeded() :
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publicKey
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)
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var userED25519KeyPair: Box.KeyPair?
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return Just(())
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.setFailureType(to: Error.self)
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.flatMap { _ -> Future<[SnodeAPI.Namespace: String], Error> in
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Future<[SnodeAPI.Namespace: String], Error> { resolver in
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let namespaceLastHash: [SnodeAPI.Namespace: String] = namespaces
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.reduce(into: [:]) { result, namespace in
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// Prune expired message hashes for this namespace on this service node
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SnodeReceivedMessageInfo.pruneExpiredMessageHashInfo(
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for: snode,
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namespace: namespace,
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associatedWith: publicKey
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)
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let maybeLastHash: String? = SnodeReceivedMessageInfo
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.fetchLastNotExpired(
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for: snode,
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namespace: namespace,
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associatedWith: publicKey
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)?
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.hash
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guard let lastHash: String = maybeLastHash else { return }
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result[namespace] = lastHash
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}
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resolver(Result.success(namespaceLastHash))
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}
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}
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.flatMap { namespaceLastHash -> AnyPublisher<[SnodeAPI.Namespace: (info: ResponseInfoType, data: (messages: [SnodeReceivedMessage], lastHash: String?)?)], Error> in
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let requests: [SnodeAPI.BatchRequest.Info]
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do {
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requests = try namespaces
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.map { namespace -> SnodeAPI.BatchRequest.Info in
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// Check if this namespace requires authentication
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guard namespace.requiresReadAuthentication else {
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return BatchRequest.Info(
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request: SnodeRequest(
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endpoint: .getMessages,
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body: LegacyGetMessagesRequest(
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pubkey: targetPublicKey,
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lastHash: (namespaceLastHash[namespace] ?? ""),
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namespace: namespace
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)
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),
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responseType: GetMessagesResponse.self
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)
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}
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// Generate the signature
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guard let keyPair: Box.KeyPair = (userED25519KeyPair ?? Storage.shared.read { db in Identity.fetchUserEd25519KeyPair(db) }) else {
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throw SnodeAPIError.signingFailed
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}
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userED25519KeyPair = keyPair
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return BatchRequest.Info(
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request: SnodeRequest(
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endpoint: .getMessages,
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body: GetMessagesRequest(
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lastHash: (namespaceLastHash[namespace] ?? ""),
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namespace: namespace,
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pubkey: targetPublicKey,
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subkey: nil,
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timestampMs: SnodeAPI.offsetTimestampMsNow(),
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ed25519PublicKey: keyPair.publicKey,
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ed25519SecretKey: keyPair.secretKey
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)
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),
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responseType: GetMessagesResponse.self
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)
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}
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}
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catch {
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return Fail(error: error)
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.eraseToAnyPublisher()
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}
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let responseTypes = requests.map { $0.responseType }
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return SnodeAPI
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.send(
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request: SnodeRequest(
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endpoint: .batch,
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body: BatchRequest(requests: requests)
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),
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to: snode,
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associatedWith: publicKey,
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using: dependencies
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)
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.decoded(as: responseTypes, using: dependencies)
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.map { batchResponse -> [SnodeAPI.Namespace: (info: ResponseInfoType, data: (messages: [SnodeReceivedMessage], lastHash: String?)?)] in
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zip(namespaces, batchResponse.responses)
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.reduce(into: [:]) { result, next in
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guard
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let subResponse: HTTP.BatchSubResponse<GetMessagesResponse> = (next.1 as? HTTP.BatchSubResponse<GetMessagesResponse>),
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let messageResponse: GetMessagesResponse = subResponse.body
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else {
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return
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}
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let namespace: SnodeAPI.Namespace = next.0
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result[namespace] = (
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info: subResponse.responseInfo,
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data: (
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messages: messageResponse.messages
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.compactMap { rawMessage -> SnodeReceivedMessage? in
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SnodeReceivedMessage(
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snode: snode,
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publicKey: publicKey,
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namespace: namespace,
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rawMessage: rawMessage
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)
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},
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lastHash: namespaceLastHash[namespace]
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)
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)
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}
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}
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.eraseToAnyPublisher()
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}
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.eraseToAnyPublisher()
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}
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// MARK: - Store
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public static func sendMessage(
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_ message: SnodeMessage,
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in namespace: Namespace,
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using dependencies: SSKDependencies = SSKDependencies()
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) -> AnyPublisher<(ResponseInfoType, SendMessagesResponse), Error> {
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let publicKey: String = (Features.useTestnet ?
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message.recipient.removingIdPrefixIfNeeded() :
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message.recipient
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)
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// Create a convenience method to send a message to an individual Snode
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func sendMessage(to snode: Snode) -> AnyPublisher<(any ResponseInfoType, SendMessagesResponse), Error> {
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guard namespace.requiresWriteAuthentication else {
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return SnodeAPI
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.send(
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request: SnodeRequest(
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endpoint: .sendMessage,
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body: LegacySendMessagesRequest(
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message: message,
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namespace: namespace
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)
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),
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to: snode,
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associatedWith: publicKey,
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using: dependencies
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)
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.decoded(as: SendMessagesResponse.self, using: dependencies)
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.eraseToAnyPublisher()
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}
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guard let userED25519KeyPair: Box.KeyPair = Storage.shared.read({ db in Identity.fetchUserEd25519KeyPair(db) }) else {
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return Fail(error: SnodeAPIError.noKeyPair)
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.eraseToAnyPublisher()
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}
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return SnodeAPI
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.send(
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request: SnodeRequest(
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endpoint: .sendMessage,
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body: SendMessageRequest(
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message: message,
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namespace: namespace,
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subkey: nil,
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timestampMs: SnodeAPI.offsetTimestampMsNow(),
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ed25519PublicKey: userED25519KeyPair.publicKey,
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ed25519SecretKey: userED25519KeyPair.secretKey
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)
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),
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to: snode,
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associatedWith: publicKey,
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using: dependencies
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)
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.decoded(as: SendMessagesResponse.self, using: dependencies)
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.eraseToAnyPublisher()
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}
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return getSwarm(for: publicKey)
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.subscribe(on: Threading.workQueue)
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.flatMap { swarm -> AnyPublisher<(ResponseInfoType, SendMessagesResponse), Error> in
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guard let snode: Snode = swarm.randomElement() else {
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return Fail(error: SnodeAPIError.generic)
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.eraseToAnyPublisher()
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}
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return sendMessage(to: snode)
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.retry(maxRetryCount)
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.eraseToAnyPublisher()
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}
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.retry(maxRetryCount)
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.eraseToAnyPublisher()
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}
|
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|
|
public static func sendConfigMessages(
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_ targetedMessages: [TargetedMessage],
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oldHashes: [String],
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using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<HTTP.BatchResponse, Error> {
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guard
|
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!targetedMessages.isEmpty,
|
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let recipient: String = targetedMessages.first?.message.recipient
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else {
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return Fail(error: SnodeAPIError.generic)
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.eraseToAnyPublisher()
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}
|
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// TODO: Need to get either the closed group subKey or the userEd25519 key for auth
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let userX25519PublicKey: String = getUserHexEncodedPublicKey()
|
|
let publicKey: String = (Features.useTestnet ?
|
|
recipient.removingIdPrefixIfNeeded() :
|
|
recipient
|
|
)
|
|
var requests: [SnodeAPI.BatchRequest.Info] = targetedMessages
|
|
.map { message, namespace in
|
|
// Check if this namespace requires authentication
|
|
guard namespace.requiresReadAuthentication else {
|
|
return BatchRequest.Info(
|
|
request: SnodeRequest(
|
|
endpoint: .sendMessage,
|
|
body: LegacySendMessagesRequest(
|
|
message: message,
|
|
namespace: namespace
|
|
)
|
|
),
|
|
responseType: SendMessagesResponse.self
|
|
)
|
|
}
|
|
|
|
return BatchRequest.Info(
|
|
request: SnodeRequest(
|
|
endpoint: .sendMessage,
|
|
body: SendMessageRequest(
|
|
message: message,
|
|
namespace: namespace,
|
|
subkey: nil, // TODO: Need to get this
|
|
timestampMs: SnodeAPI.offsetTimestampMsNow(),
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
responseType: SendMessagesResponse.self
|
|
)
|
|
}
|
|
|
|
// If we had any previous config messages then we should delete them
|
|
if !oldHashes.isEmpty {
|
|
requests.append(
|
|
BatchRequest.Info(
|
|
request: SnodeRequest(
|
|
endpoint: .deleteMessages,
|
|
body: DeleteMessagesRequest(
|
|
messageHashes: oldHashes,
|
|
requireSuccessfulDeletion: false,
|
|
pubkey: userX25519PublicKey,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
responseType: DeleteMessagesResponse.self
|
|
)
|
|
)
|
|
}
|
|
|
|
let responseTypes = requests.map { $0.responseType }
|
|
|
|
return getSwarm(for: publicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<HTTP.BatchResponse, Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .sequence,
|
|
body: BatchRequest(requests: requests)
|
|
),
|
|
to: snode,
|
|
associatedWith: publicKey,
|
|
using: dependencies
|
|
)
|
|
.eraseToAnyPublisher()
|
|
.decoded(as: responseTypes, using: dependencies)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
// MARK: - Edit
|
|
|
|
public static func updateExpiry(
|
|
publicKey: String,
|
|
serverHashes: [String],
|
|
updatedExpiryMs: UInt64,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<[String: (hashes: [String], expiry: UInt64)], Error> {
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let publicKey: String = (Features.useTestnet ?
|
|
publicKey.removingIdPrefixIfNeeded() :
|
|
publicKey
|
|
)
|
|
|
|
return getSwarm(for: publicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<[String: (hashes: [String], expiry: UInt64)], Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .expire,
|
|
body: UpdateExpiryRequest(
|
|
messageHashes: serverHashes,
|
|
expiryMs: updatedExpiryMs,
|
|
pubkey: publicKey,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey,
|
|
subkey: nil
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: publicKey,
|
|
using: dependencies
|
|
)
|
|
.decoded(as: UpdateExpiryResponse.self, using: dependencies)
|
|
.flatMap { _, response -> AnyPublisher<[String: (hashes: [String], expiry: UInt64)], Error> in
|
|
do {
|
|
let result: [String: (hashes: [String], expiry: UInt64)] = try response.validResultMap(
|
|
userX25519PublicKey: getUserHexEncodedPublicKey(),
|
|
messageHashes: serverHashes,
|
|
sodium: sodium.wrappedValue
|
|
)
|
|
|
|
return Just(result)
|
|
.setFailureType(to: Error.self)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
catch {
|
|
return Fail(error: error)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
public static func revokeSubkey(
|
|
publicKey: String,
|
|
subkeyToRevoke: String,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<Void, Error> {
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let publicKey: String = (Features.useTestnet ?
|
|
publicKey.removingIdPrefixIfNeeded() :
|
|
publicKey
|
|
)
|
|
|
|
return getSwarm(for: publicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<Void, Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .revokeSubkey,
|
|
body: RevokeSubkeyRequest(
|
|
subkeyToRevoke: subkeyToRevoke,
|
|
pubkey: publicKey,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: publicKey,
|
|
using: dependencies
|
|
)
|
|
.decoded(as: RevokeSubkeyResponse.self, using: dependencies)
|
|
.flatMap { _, response -> AnyPublisher<Void, Error> in
|
|
do {
|
|
try response.validateResult(
|
|
userX25519PublicKey: getUserHexEncodedPublicKey(),
|
|
subkeyToRevoke: subkeyToRevoke,
|
|
sodium: sodium.wrappedValue
|
|
)
|
|
}
|
|
catch {
|
|
return Fail(error: error)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return Just(())
|
|
.setFailureType(to: Error.self)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
// MARK: Delete
|
|
|
|
public static func deleteMessages(
|
|
publicKey: String,
|
|
serverHashes: [String],
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<[String: Bool], Error> {
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let publicKey: String = (Features.useTestnet ?
|
|
publicKey.removingIdPrefixIfNeeded() :
|
|
publicKey
|
|
)
|
|
let userX25519PublicKey: String = getUserHexEncodedPublicKey()
|
|
|
|
return getSwarm(for: publicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<[String: Bool], Error> in
|
|
Just(())
|
|
.setFailureType(to: Error.self)
|
|
.flatMap { _ -> AnyPublisher<Snode, Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return Just(snode)
|
|
.setFailureType(to: Error.self)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.flatMap { snode -> AnyPublisher<[String: Bool], Error> in
|
|
SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .deleteMessages,
|
|
body: DeleteMessagesRequest(
|
|
messageHashes: serverHashes,
|
|
requireSuccessfulDeletion: false,
|
|
pubkey: userX25519PublicKey,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: publicKey,
|
|
using: dependencies
|
|
)
|
|
.subscribe(on: Threading.workQueue)
|
|
.eraseToAnyPublisher()
|
|
.decoded(as: DeleteMessagesResponse.self, using: dependencies)
|
|
.map { _, response -> [String: Bool] in
|
|
let validResultMap: [String: Bool] = response.validResultMap(
|
|
userX25519PublicKey: userX25519PublicKey,
|
|
serverHashes: serverHashes,
|
|
sodium: sodium.wrappedValue
|
|
)
|
|
|
|
// If at least one service node deleted successfully then we should
|
|
// mark the hash as invalid so we don't try to fetch updates using
|
|
// that hash going forward (if we do we would end up re-fetching
|
|
// all old messages)
|
|
if validResultMap.values.contains(true) {
|
|
Storage.shared.writeAsync { db in
|
|
try? SnodeReceivedMessageInfo.handlePotentialDeletedOrInvalidHash(
|
|
db,
|
|
potentiallyInvalidHashes: serverHashes
|
|
)
|
|
}
|
|
}
|
|
|
|
return validResultMap
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
/// Clears all the user's data from their swarm. Returns a dictionary of snode public key to deletion confirmation.
|
|
public static func deleteAllMessages(
|
|
namespace: SnodeAPI.Namespace? = nil,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<[String: Bool], Error> {
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let userX25519PublicKey: String = getUserHexEncodedPublicKey()
|
|
|
|
return getSwarm(for: userX25519PublicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<[String: Bool], Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return getNetworkTime(from: snode)
|
|
.flatMap { timestampMs -> AnyPublisher<[String: Bool], Error> in
|
|
SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .deleteAll,
|
|
body: DeleteAllMessagesRequest(
|
|
namespace: namespace,
|
|
pubkey: userX25519PublicKey,
|
|
timestampMs: timestampMs,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: nil,
|
|
using: dependencies
|
|
)
|
|
.decoded(as: DeleteAllMessagesResponse.self, using: dependencies)
|
|
.map { _, response in
|
|
let validResultMap: [String: Bool] = response.validResultMap(
|
|
userX25519PublicKey: userX25519PublicKey,
|
|
timestampMs: timestampMs,
|
|
sodium: sodium.wrappedValue
|
|
)
|
|
|
|
return validResultMap
|
|
}
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
/// Clears all the user's data from their swarm. Returns a dictionary of snode public key to deletion confirmation.
|
|
public static func deleteAllMessages(
|
|
beforeMs: UInt64,
|
|
namespace: SnodeAPI.Namespace? = nil,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<[String: Bool], Error> {
|
|
guard let userED25519KeyPair = Identity.fetchUserEd25519KeyPair() else {
|
|
return Fail(error: SnodeAPIError.noKeyPair)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
let userX25519PublicKey: String = getUserHexEncodedPublicKey()
|
|
|
|
return getSwarm(for: userX25519PublicKey)
|
|
.subscribe(on: Threading.workQueue)
|
|
.flatMap { swarm -> AnyPublisher<[String: Bool], Error> in
|
|
guard let snode: Snode = swarm.randomElement() else {
|
|
return Fail(error: SnodeAPIError.generic)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return getNetworkTime(from: snode)
|
|
.flatMap { timestampMs -> AnyPublisher<[String: Bool], Error> in
|
|
SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .deleteAllBefore,
|
|
body: DeleteAllBeforeRequest(
|
|
beforeMs: beforeMs,
|
|
namespace: namespace,
|
|
pubkey: userX25519PublicKey,
|
|
timestampMs: timestampMs,
|
|
ed25519PublicKey: userED25519KeyPair.publicKey,
|
|
ed25519SecretKey: userED25519KeyPair.secretKey
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: nil,
|
|
using: dependencies
|
|
)
|
|
.decoded(as: DeleteAllBeforeResponse.self, using: dependencies)
|
|
.map { _, response in
|
|
let validResultMap: [String: Bool] = response.validResultMap(
|
|
userX25519PublicKey: userX25519PublicKey,
|
|
beforeMs: beforeMs,
|
|
sodium: sodium.wrappedValue
|
|
)
|
|
|
|
return validResultMap
|
|
}
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.retry(maxRetryCount)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
// MARK: - Internal API
|
|
|
|
private static func getNetworkTime(
|
|
from snode: Snode,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<UInt64, Error> {
|
|
return SnodeAPI
|
|
.send(
|
|
request: SnodeRequest<[String: String]>(
|
|
endpoint: .getInfo,
|
|
body: [:]
|
|
),
|
|
to: snode,
|
|
associatedWith: nil
|
|
)
|
|
.decoded(as: GetNetworkTimestampResponse.self, using: dependencies)
|
|
.map { _, response in response.timestamp }
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
internal static func getRandomSnode() -> AnyPublisher<Snode, Error> {
|
|
// randomElement() uses the system's default random generator, which is cryptographically secure
|
|
return getSnodePool()
|
|
.map { $0.randomElement()! }
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
private static func getSnodePoolFromSeedNode(
|
|
dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<Set<Snode>, Error> {
|
|
let request: SnodeRequest = SnodeRequest(
|
|
endpoint: .jsonGetNServiceNodes,
|
|
body: GetServiceNodesRequest(
|
|
activeOnly: true,
|
|
limit: 256,
|
|
fields: GetServiceNodesRequest.Fields(
|
|
publicIp: true,
|
|
storagePort: true,
|
|
pubkeyEd25519: true,
|
|
pubkeyX25519: true
|
|
)
|
|
)
|
|
)
|
|
|
|
guard let target: String = seedNodePool.randomElement() else {
|
|
return Fail(error: SnodeAPIError.snodePoolUpdatingFailed)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
guard let payload: Data = try? JSONEncoder().encode(request) else {
|
|
return Fail(error: HTTPError.invalidJSON)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
SNLog("Populating snode pool using seed node: \(target).")
|
|
|
|
return HTTP
|
|
.execute(
|
|
.post,
|
|
"\(target)/json_rpc",
|
|
body: payload,
|
|
useSeedNodeURLSession: true
|
|
)
|
|
.decoded(as: SnodePoolResponse.self, using: dependencies)
|
|
.subscribe(on: Threading.workQueue)
|
|
.mapError { error in
|
|
switch error {
|
|
case HTTPError.parsingFailed: return SnodeAPIError.snodePoolUpdatingFailed
|
|
default: return error
|
|
}
|
|
}
|
|
.map { snodePool -> Set<Snode> in
|
|
snodePool.result
|
|
.serviceNodeStates
|
|
.compactMap { $0.value }
|
|
.asSet()
|
|
}
|
|
.retry(4)
|
|
.handleEvents(
|
|
receiveCompletion: { result in
|
|
switch result {
|
|
case .finished: SNLog("Got snode pool from seed node: \(target).")
|
|
case .failure: SNLog("Failed to contact seed node at: \(target).")
|
|
}
|
|
}
|
|
)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
private static func getSnodePoolFromSnode(
|
|
dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<Set<Snode>, Error> {
|
|
var snodePool = SnodeAPI.snodePool.wrappedValue
|
|
var snodes: Set<Snode> = []
|
|
(0..<3).forEach { _ in
|
|
guard let snode = snodePool.randomElement() else { return }
|
|
|
|
snodePool.remove(snode)
|
|
snodes.insert(snode)
|
|
}
|
|
|
|
return Publishers
|
|
.MergeMany(
|
|
snodes
|
|
.map { snode -> AnyPublisher<Set<Snode>, Error> in
|
|
// Don't specify a limit in the request. Service nodes return a shuffled
|
|
// list of nodes so if we specify a limit the 3 responses we get might have
|
|
// very little overlap.
|
|
SnodeAPI
|
|
.send(
|
|
request: SnodeRequest(
|
|
endpoint: .oxenDaemonRPCCall,
|
|
body: OxenDaemonRPCRequest(
|
|
endpoint: .daemonGetServiceNodes,
|
|
body: GetServiceNodesRequest(
|
|
activeOnly: true,
|
|
limit: nil,
|
|
fields: GetServiceNodesRequest.Fields(
|
|
publicIp: true,
|
|
storagePort: true,
|
|
pubkeyEd25519: true,
|
|
pubkeyX25519: true
|
|
)
|
|
)
|
|
)
|
|
),
|
|
to: snode,
|
|
associatedWith: nil
|
|
)
|
|
.decoded(as: SnodePoolResponse.self, using: dependencies)
|
|
.mapError { error -> Error in
|
|
switch error {
|
|
case HTTPError.parsingFailed:
|
|
return SnodeAPIError.snodePoolUpdatingFailed
|
|
|
|
default: return error
|
|
}
|
|
}
|
|
.map { _, snodePool -> Set<Snode> in
|
|
snodePool.result
|
|
.serviceNodeStates
|
|
.compactMap { $0.value }
|
|
.asSet()
|
|
}
|
|
.retry(4)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
)
|
|
.collect()
|
|
.flatMap { results -> AnyPublisher<Set<Snode>, Error> in
|
|
let result: Set<Snode> = results.reduce(Set()) { prev, next in prev.intersection(next) }
|
|
|
|
// We want the snodes to agree on at least this many snodes
|
|
guard result.count > 24 else {
|
|
return Fail(error: SnodeAPIError.inconsistentSnodePools)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
// Limit the snode pool size to 256 so that we don't go too long without
|
|
// refreshing it
|
|
return Just(Set(result.prefix(256)))
|
|
.setFailureType(to: Error.self)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
private static func send<T: Encodable>(
|
|
request: SnodeRequest<T>,
|
|
to snode: Snode,
|
|
associatedWith publicKey: String?,
|
|
using dependencies: SSKDependencies = SSKDependencies()
|
|
) -> AnyPublisher<(ResponseInfoType, Data?), Error> {
|
|
guard let payload: Data = try? JSONEncoder().encode(request) else {
|
|
return Fail(error: HTTPError.invalidJSON)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
guard Features.useOnionRequests else {
|
|
return HTTP
|
|
.execute(
|
|
.post,
|
|
"\(snode.address):\(snode.port)/storage_rpc/v1",
|
|
body: payload
|
|
)
|
|
.map { response in (HTTP.ResponseInfo(code: -1, headers: [:]), response) }
|
|
.mapError { error in
|
|
switch error {
|
|
case HTTPError.httpRequestFailed(let statusCode, let data):
|
|
return (SnodeAPI.handleError(withStatusCode: statusCode, data: data, forSnode: snode, associatedWith: publicKey) ?? error)
|
|
|
|
default: return error
|
|
}
|
|
}
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
return dependencies.onionApi
|
|
.sendOnionRequest(
|
|
payload,
|
|
to: snode
|
|
)
|
|
.mapError { error in
|
|
switch error {
|
|
case HTTPError.httpRequestFailed(let statusCode, let data):
|
|
return (SnodeAPI.handleError(withStatusCode: statusCode, data: data, forSnode: snode, associatedWith: publicKey) ?? error)
|
|
|
|
default: return error
|
|
}
|
|
}
|
|
.handleEvents(
|
|
receiveOutput: { _, maybeData in
|
|
// Extract and store hard fork information if returned
|
|
guard
|
|
let data: Data = maybeData,
|
|
let snodeResponse: SnodeResponse = try? JSONDecoder()
|
|
.decode(SnodeResponse.self, from: data)
|
|
else { return }
|
|
|
|
if snodeResponse.hardFork[1] > softfork {
|
|
softfork = snodeResponse.hardFork[1]
|
|
UserDefaults.standard[.softfork] = softfork
|
|
}
|
|
|
|
if snodeResponse.hardFork[0] > hardfork {
|
|
hardfork = snodeResponse.hardFork[0]
|
|
UserDefaults.standard[.hardfork] = hardfork
|
|
softfork = snodeResponse.hardFork[1]
|
|
UserDefaults.standard[.softfork] = softfork
|
|
}
|
|
}
|
|
)
|
|
.eraseToAnyPublisher()
|
|
}
|
|
|
|
// MARK: - Parsing
|
|
|
|
// The parsing utilities below use a best attempt approach to parsing; they warn for parsing
|
|
// failures but don't throw exceptions.
|
|
|
|
private static func parseSnodes(from responseData: Data?) -> Set<Snode> {
|
|
guard
|
|
let responseData: Data = responseData,
|
|
let responseJson: JSON = try? JSONSerialization.jsonObject(
|
|
with: responseData,
|
|
options: [ .fragmentsAllowed ]
|
|
) as? JSON
|
|
else {
|
|
SNLog("Failed to parse snodes from response data.")
|
|
return []
|
|
}
|
|
guard let rawSnodes = responseJson["snodes"] as? [JSON] else {
|
|
SNLog("Failed to parse snodes from: \(responseJson).")
|
|
return []
|
|
}
|
|
|
|
guard let snodeData: Data = try? JSONSerialization.data(withJSONObject: rawSnodes, options: []) else {
|
|
return []
|
|
}
|
|
|
|
// FIXME: Hopefully at some point this different Snode structure will be deprecated and can be removed
|
|
if
|
|
let swarmSnodes: [SwarmSnode] = try? JSONDecoder().decode([Failable<SwarmSnode>].self, from: snodeData).compactMap({ $0.value }),
|
|
!swarmSnodes.isEmpty
|
|
{
|
|
return swarmSnodes.map { $0.toSnode() }.asSet()
|
|
}
|
|
|
|
return ((try? JSONDecoder().decode([Failable<Snode>].self, from: snodeData)) ?? [])
|
|
.compactMap { $0.value }
|
|
.asSet()
|
|
}
|
|
|
|
// MARK: - Error Handling
|
|
|
|
/// - Note: Should only be invoked from `Threading.workQueue` to avoid race conditions.
|
|
@discardableResult
|
|
internal static func handleError(
|
|
withStatusCode statusCode: UInt,
|
|
data: Data?,
|
|
forSnode snode: Snode,
|
|
associatedWith publicKey: String? = nil
|
|
) -> Error? {
|
|
func handleBadSnode() {
|
|
let oldFailureCount = (SnodeAPI.snodeFailureCount.wrappedValue[snode] ?? 0)
|
|
let newFailureCount = oldFailureCount + 1
|
|
SnodeAPI.snodeFailureCount.mutate { $0[snode] = newFailureCount }
|
|
SNLog("Couldn't reach snode at: \(snode); setting failure count to \(newFailureCount).")
|
|
if newFailureCount >= SnodeAPI.snodeFailureThreshold {
|
|
SNLog("Failure threshold reached for: \(snode); dropping it.")
|
|
if let publicKey = publicKey {
|
|
SnodeAPI.dropSnodeFromSwarmIfNeeded(snode, publicKey: publicKey)
|
|
}
|
|
SnodeAPI.dropSnodeFromSnodePool(snode)
|
|
SNLog("Snode pool count: \(snodePool.wrappedValue.count).")
|
|
SnodeAPI.snodeFailureCount.mutate { $0[snode] = 0 }
|
|
}
|
|
}
|
|
|
|
switch statusCode {
|
|
case 500, 502, 503:
|
|
// The snode is unreachable
|
|
handleBadSnode()
|
|
|
|
case 404:
|
|
// May caused by invalid open groups
|
|
SNLog("Can't reach the server.")
|
|
|
|
case 406:
|
|
SNLog("The user's clock is out of sync with the service node network.")
|
|
return SnodeAPIError.clockOutOfSync
|
|
|
|
case 421:
|
|
// The snode isn't associated with the given public key anymore
|
|
if let publicKey = publicKey {
|
|
func invalidateSwarm() {
|
|
SNLog("Invalidating swarm for: \(publicKey).")
|
|
SnodeAPI.dropSnodeFromSwarmIfNeeded(snode, publicKey: publicKey)
|
|
}
|
|
|
|
if let data: Data = data {
|
|
let snodes = parseSnodes(from: data)
|
|
|
|
if !snodes.isEmpty {
|
|
setSwarm(to: snodes, for: publicKey)
|
|
}
|
|
else {
|
|
invalidateSwarm()
|
|
}
|
|
}
|
|
else {
|
|
invalidateSwarm()
|
|
}
|
|
}
|
|
else {
|
|
SNLog("Got a 421 without an associated public key.")
|
|
}
|
|
|
|
default:
|
|
handleBadSnode()
|
|
SNLog("Unhandled response code: \(statusCode).")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
}
|