transaction records for payment watcher

- bearer token not implemented yet - needs to be ran and tested - maybe overkill passing two params to retrieve the records - maybe try just one
Another total_stake SQL fix (#5516 )
2025-02-25 13:56:53 +01:00 · 2025-02-24 18:06:03 +01:00 · 2025-02-24 20:50:42 +05:30 · 2025-02-24 13:33:20 +01:00 · 2025-02-24 14:23:43 +02:00 · 2025-02-24 09:04:34 +00:00
261 changed files with 7493 additions and 4679 deletions
@@ -54,6 +54,20 @@ jobs:
          override: true
          components: rustfmt, clippy

+      # To avoid running out of disk space, skip generating debug symbols
+      - name: Set debug to false (unix)
+        if: contains(matrix.os, 'ubuntu') || contains(matrix.os, 'mac')
+        run: |
+          sed -i.bak 's/\[profile.dev\]/\[profile.dev\]\ndebug = false/' Cargo.toml
+          git diff
+
+      - name: Set debug to false (win)
+        if: contains(matrix.os, 'windows')
+        shell: pwsh
+        run: |
+          (Get-Content Cargo.toml) -replace '\[profile.dev\]', "`$&`ndebug = false" | Set-Content Cargo.toml
+          git diff
+
      - name: Check formatting
        uses: actions-rs/cargo@v1
        with:
@@ -9,6 +9,8 @@ on:
    paths:
      - 'contracts/**'
      - 'common/**'
+      - 'Cargo.lock'
+      - 'Cargo.toml'
      - '.github/workflows/ci-contracts.yml'

 jobs:
@@ -30,6 +30,12 @@ jobs:
          override: true
          components: rustfmt, clippy

+      - name: Set debug to false
+        working-directory: nym-wallet
+        run: |
+          sed -i.bak '1s/^/\[profile.dev\]\ndebug = false\n\n/' Cargo.toml
+          git diff
+
      - name: Build all binaries
        uses: actions-rs/cargo@v1
        with:
@@ -45,6 +45,11 @@ jobs:
      - name: Install wasm-bindgen-cli
        run: cargo install wasm-bindgen-cli

+      - name: Set debug to false
+        run: |
+          sed -i.bak 's/\[profile.dev\]/\[profile.dev\]\ndebug = false/' Cargo.toml
+          git diff
+
      - name: "Build"
        run: make sdk-wasm-build

@@ -4,6 +4,122 @@ Post 1.0.0 release, the changelog format is based on [Keep a Changelog](https://

 ## [Unreleased]

+## [2025.3-ruta] (2025-02-10)
+
+- Push down forget me to client configs ([#5431])
+- Fix statistics shutdown ([#5426])
+- Make wait_for_graceful_shutdown to be pub ([#5424])
+- Upgrade to thiserror 2.0 ([#5414])
+- build(deps): bump the patch-updates group across 1 directory with 9 updates ([#5406])
+- Relocate a validator api function ([#5401])
+- Send shutdown instead of panic when reaching max fail ([#5398])
+- Change Explorer URL to new smooshed nodes ([#5396])
+- reduce log severity for checking topology validity ([#5395])
+- MixnetClient can send ClientRequests ([#5381])
+- Fix missing path triggers for CI ([#5380])
+- Uncouple storage reference for bandwidth client ([#5372])
+- build(deps): bump tokio from 1.40.0 to 1.43.0 ([#5370])
+- DNS resolver configuration for internal HTTP client lookups ([#5355])
+- Update README.md ([#5328])
+- Update README.md ([#5327])
+
+[#5431]: https://github.com/nymtech/nym/pull/5431
+[#5426]: https://github.com/nymtech/nym/pull/5426
+[#5424]: https://github.com/nymtech/nym/pull/5424
+[#5414]: https://github.com/nymtech/nym/pull/5414
+[#5406]: https://github.com/nymtech/nym/pull/5406
+[#5401]: https://github.com/nymtech/nym/pull/5401
+[#5398]: https://github.com/nymtech/nym/pull/5398
+[#5396]: https://github.com/nymtech/nym/pull/5396
+[#5395]: https://github.com/nymtech/nym/pull/5395
+[#5381]: https://github.com/nymtech/nym/pull/5381
+[#5380]: https://github.com/nymtech/nym/pull/5380
+[#5372]: https://github.com/nymtech/nym/pull/5372
+[#5370]: https://github.com/nymtech/nym/pull/5370
+[#5355]: https://github.com/nymtech/nym/pull/5355
+[#5328]: https://github.com/nymtech/nym/pull/5328
+[#5327]: https://github.com/nymtech/nym/pull/5327
+
+## [2025.2-hu] (2025-02-04)
+
+- Feature/remove double spending bloomfilter ([#5417])
+- HU - Downgrade harmless log message from info to debug ([#5405])
+- lower default ticket verification quorum to 0.7 ([#5404])
+- Downgrade harmless log message from info to debug ([#5403])
+- Redirect from mixnode page to nodes page ([#5397])
+- chore :update version of chain watcher and validator rewarder ([#5394])
+- bugfix: correctly handle ingore epoch roles flag ([#5390])
+- bugfix: terminate mixnet socket listener on shutdown ([#5389])
+- feat: make client ignore dual mode nodes by default ([#5388])
+- Handle ecash network errors differently ([#5378])
+- Remove empty ephemeral keys ([#5376])
+- fixed sql migration for adding default message timestamp ([#5374])
+- Bind to [::] on nym-node for both IP versions ([#5361])
+- exposed NymApiClient method for obtaining node performance history ([#5360])
+- Client gateway selection ([#5358])
+- chore: refresh wasm sdk ([#5353])
+- chore: update indexed_db_futures ([#5347])
+- build(deps): bump mikefarah/yq from 4.44.6 to 4.45.1 ([#5342])
+- updated cosmrs and tendermint-rpc to their most recent versions ([#5339])
+- build(deps): bump ts-rs from 10.0.0 to 10.1.0 ([#5338])
+- build(deps): bump tempfile from 3.14.0 to 3.15.0 ([#5337])
+- build(deps): bump the patch-updates group with 8 updates ([#5336])
+- feature: introduce /load endpoint for self-reported quantised NymNode load ([#5326])
+- feature: `CancellationToken`-based shutdowns ([#5325])
+- Use expect in geodata test to give error message on failure ([#5314])
+- feature: periodically remove stale gateway messages ([#5312])
+- build(deps): bump the patch-updates group across 1 directory with 35 updates ([#5310])
+- Add dependabot assignes for the root cargo ecosystem ([#5297])
+- Move tun constants to network defaults ([#5286])
+- Include IPINFO_API_TOKEN in nightly CI ([#5285])
+- Nyx Chain Watcher ([#5274])
+- bugfix: remove unnecessary arguments for nym-api swagger endpoints ([#5272])
+- feature: nym topology revamp ([#5271])
+- Add windows to CI builds ([#5269])
+- http-api-client: deduplicate code ([#5267])
+- build(deps): bump http from 1.1.0 to 1.2.0 ([#5228])
+- NS API: add mixnet scraper ([#5200])
+- build(deps): bump criterion from 0.4.0 to 0.5.1 ([#4911])
+
+[#5417]: https://github.com/nymtech/nym/pull/5417
+[#5405]: https://github.com/nymtech/nym/pull/5405
+[#5404]: https://github.com/nymtech/nym/pull/5404
+[#5403]: https://github.com/nymtech/nym/pull/5403
+[#5397]: https://github.com/nymtech/nym/pull/5397
+[#5394]: https://github.com/nymtech/nym/pull/5394
+[#5390]: https://github.com/nymtech/nym/pull/5390
+[#5389]: https://github.com/nymtech/nym/pull/5389
+[#5388]: https://github.com/nymtech/nym/pull/5388
+[#5378]: https://github.com/nymtech/nym/pull/5378
+[#5376]: https://github.com/nymtech/nym/pull/5376
+[#5374]: https://github.com/nymtech/nym/pull/5374
+[#5361]: https://github.com/nymtech/nym/pull/5361
+[#5360]: https://github.com/nymtech/nym/pull/5360
+[#5358]: https://github.com/nymtech/nym/pull/5358
+[#5353]: https://github.com/nymtech/nym/pull/5353
+[#5347]: https://github.com/nymtech/nym/pull/5347
+[#5342]: https://github.com/nymtech/nym/pull/5342
+[#5339]: https://github.com/nymtech/nym/pull/5339
+[#5338]: https://github.com/nymtech/nym/pull/5338
+[#5337]: https://github.com/nymtech/nym/pull/5337
+[#5336]: https://github.com/nymtech/nym/pull/5336
+[#5326]: https://github.com/nymtech/nym/pull/5326
+[#5325]: https://github.com/nymtech/nym/pull/5325
+[#5314]: https://github.com/nymtech/nym/pull/5314
+[#5312]: https://github.com/nymtech/nym/pull/5312
+[#5310]: https://github.com/nymtech/nym/pull/5310
+[#5297]: https://github.com/nymtech/nym/pull/5297
+[#5286]: https://github.com/nymtech/nym/pull/5286
+[#5285]: https://github.com/nymtech/nym/pull/5285
+[#5274]: https://github.com/nymtech/nym/pull/5274
+[#5272]: https://github.com/nymtech/nym/pull/5272
+[#5271]: https://github.com/nymtech/nym/pull/5271
+[#5269]: https://github.com/nymtech/nym/pull/5269
+[#5267]: https://github.com/nymtech/nym/pull/5267
+[#5228]: https://github.com/nymtech/nym/pull/5228
+[#5200]: https://github.com/nymtech/nym/pull/5200
+[#4911]: https://github.com/nymtech/nym/pull/4911
+
 ## [2025.1-reeses] (2025-01-15)

 - Feture/legacy alert ([#5346])
@@ -48,7 +48,6 @@ members = [
    "common/credentials-interface",
    "common/crypto",
    "common/dkg",
-    "common/ecash-double-spending",
    "common/ecash-time",
    "common/execute",
    "common/exit-policy",
@@ -188,18 +187,21 @@ readme = "README.md"

 [workspace.dependencies]
 addr = "0.15.6"
+aead = "0.5.2"
 aes = "0.8.1"
 aes-gcm = "0.10.1"
 aes-gcm-siv = "0.11.1"
-aead = "0.5.2"
+ammonia = "4"
 anyhow = "1.0.95"
 arc-swap = "1.7.1"
 argon2 = "0.5.0"
-async-trait = "0.1.85"
-axum-client-ip = "0.6.1"
+async-trait = "0.1.86"
 axum = "0.7.5"
+axum-client-ip = "0.6.1"
 axum-extra = "0.9.4"
+axum-test = "16.2.0"
 base64 = "0.22.1"
+base85rs = "0.1.3"
 bincode = "1.3.3"
 bip39 = { version = "2.0.0", features = ["zeroize"] }
 bit-vec = "0.7.0"                                     # can we unify those?
@@ -210,17 +212,17 @@ bs58 = "0.5.1"
 bytecodec = "0.4.15"
 bytes = "1.7.2"
 cargo_metadata = "0.18.1"
-celes = "2.4.0"
+celes = "2.5.0"
 cfg-if = "1.0.0"
 chacha20 = "0.9.0"
 chacha20poly1305 = "0.10.1"
 chrono = "0.4.39"
 cipher = "0.4.3"
-clap = "4.5.26"
+clap = "4.5.30"
 clap_complete = "4.5"
 clap_complete_fig = "4.5"
-colored = "2.0"
-comfy-table = "7.1.3"
+colored = "2.2"
+comfy-table = "7.1.4"
 console = "0.15.10"
 console-subscriber = "0.1.1"
 console_error_panic_hook = "0.1"
@@ -240,8 +242,9 @@ doc-comment = "0.3"
 dotenvy = "0.15.6"
 ecdsa = "0.16"
 ed25519-dalek = "2.1"
-etherparse = "0.13.0"
+env_logger = "0.11.6"
 envy = "0.4"
+etherparse = "0.13.0"
 eyre = "0.6.9"
 fastrand = "2.1.1"
 flate2 = "1.0.35"
@@ -249,23 +252,23 @@ futures = "0.3.31"
 futures-util = "0.3"
 generic-array = "0.14.7"
 getrandom = "0.2.10"
-getset = "0.1.3"
+getset = "0.1.4"
 handlebars = "3.5.5"
 headers = "0.4.0"
 hex = "0.4.3"
 hex-literal = "0.3.3"
-hickory-resolver = "0.24.2"
+hickory-resolver = "0.24.3"
 hkdf = "0.12.3"
 hmac = "0.12.1"
 http = "1"
 http-body-util = "0.1"
 httpcodec = "0.2.3"
+human-repr = "1.1.0"
 humantime = "2.1.0"
 humantime-serde = "1.1.1"
-human-repr = "1.1.0"
-hyper = "1.4.1"
+hyper = "1.6.0"
 hyper-util = "0.1"
-indicatif = "0.17.9"
+indicatif = "0.17.11"
 inquire = "0.6.2"
 ip_network = "0.4.1"
 ipnetwork = "0.20"
@@ -277,13 +280,12 @@ ledger-transport = "0.10.0"
 ledger-transport-hid = "0.10.0"
 log = "0.4"
 maxminddb = "0.23.0"
-rs_merkle = "1.4.2"
 mime = "0.3.17"
 moka = { version = "0.12", features = ["future"] }
 nix = "0.27.1"
 notify = "5.1.0"
 okapi = "0.7.0"
-once_cell = "1.20.2"
+once_cell = "1.20.3"
 opentelemetry = "0.19.0"
 opentelemetry-jaeger = "0.18.0"
 parking_lot = "0.12.3"
@@ -292,7 +294,7 @@ petgraph = "0.6.5"
 pin-project = "1.1"
 pin-project-lite = "0.2.16"
 pretty_env_logger = "0.4.0"
-publicsuffix = "2.2.3"
+publicsuffix = "2.3.0"
 quote = "1"
 rand = "0.8.5"
 rand_chacha = "0.3"
@@ -306,20 +308,21 @@ reqwest = { version = "0.12.4", default-features = false }
 rocket = "0.5.0"
 rocket_cors = "0.6.0"
 rocket_okapi = "0.8.0"
+rs_merkle = "1.4.2"
 safer-ffi = "0.1.13"
 schemars = "0.8.21"
-semver = "1.0.24"
+semver = "1.0.25"
 serde = "1.0.217"
 serde_bytes = "0.11.15"
 serde_derive = "1.0"
-serde_json = "1.0.135"
-serde_json_path = "0.7.1"
+serde_json = "1.0.138"
+serde_json_path = "0.7.2"
 serde_repr = "0.1"
 serde_with = "3.9.0"
 serde_yaml = "0.9.25"
 sha2 = "0.10.8"
 si-scale = "0.2.3"
-sphinx-packet = "0.1.1"
+sphinx-packet = "0.3.1"
 sqlx = "0.7.4"
 strum = "0.26"
 strum_macros = "0.26"
@@ -327,29 +330,32 @@ subtle-encoding = "0.5"
 syn = "1"
 sysinfo = "0.33.0"
 tap = "1.0.1"
-tar = "0.4.43"
+tar = "0.4.44"
 tempfile = "3.15"
-thiserror = "1.0.64"
+thiserror = "2.0"
 time = "0.3.37"
-tokio = "1.39"
+tokio = "1.43"
+tokio-postgres = "0.7"
 tokio-stream = "0.1.17"
 tokio-test = "0.4.4"
 tokio-tun = "0.11.5"
 tokio-tungstenite = { version = "0.20.1" }
 tokio-util = "0.7.13"
-toml = "0.8.19"
-tower = "0.4.13"
+toml = "0.8.20"
+tower = "0.5.2"
 tower-http = "0.5.2"
 tracing = "0.1.41"
+tracing-log = "0.2"
 tracing-opentelemetry = "0.19.0"
 tracing-subscriber = "0.3.19"
 tracing-tree = "0.2.2"
-tracing-log = "0.2"
 ts-rs = "10.1.0"
 tungstenite = { version = "0.20.1", default-features = false }
+uniffi = "0.29.0"
+uniffi_build = "0.29.0"
 url = "2.5"
 utoipa = "5.2"
-utoipa-swagger-ui = "8.0"
+utoipa-swagger-ui = "8.1"
 utoipauto = "0.2"
 uuid = "*"
 vergen = { version = "=8.3.1", default-features = false }
@@ -385,10 +391,10 @@ cw4 = { version = "=1.1.2" }
 cw-controllers = { version = "=1.1.0" }

 # cosmrs-related
-bip32 = { version = "0.5.2", default-features = false }
+bip32 = { version = "0.5.3", default-features = false }


-cosmrs = { version = "0.21.0" }
+cosmrs = { version = "0.21.1" }
 tendermint = "0.40.0"
 tendermint-rpc = "0.40.0"
 prost = { version = "0.13", default-features = false }
@@ -1,6 +1,6 @@
 [package]
 name = "nym-client"
-version = "1.1.46"
+version = "1.1.48"
 authors = ["Dave Hrycyszyn <futurechimp@users.noreply.github.com>", "Jędrzej Stuczyński <andrew@nymtech.net>"]
 description = "Implementation of the Nym Client"
 edition = "2021"
@@ -56,7 +56,7 @@ pub fn default_data_directory<P: AsRef<Path>>(id: P) -> PathBuf {
        .join(DEFAULT_DATA_DIR)
 }

-#[derive(Debug, Deserialize, PartialEq, Serialize)]
+#[derive(Debug, Deserialize, PartialEq, Serialize, Clone)]
 pub struct Config {
    #[serde(flatten)]
    pub base: BaseClientConfig,
@@ -94,6 +94,10 @@ impl CliClientConfig for Config {
 }

 impl Config {
+    pub fn base(&self) -> BaseClientConfig {
+        self.base.clone()
+    }
+
    pub fn new<S: AsRef<str>>(id: S) -> Self {
        Config {
            base: BaseClientConfig::new(id.as_ref(), env!("CARGO_PKG_VERSION")),
@@ -209,7 +213,7 @@ impl SocketType {
    }
 }

-#[derive(Debug, Deserialize, PartialEq, Eq, Serialize)]
+#[derive(Debug, Deserialize, PartialEq, Eq, Serialize, Clone)]
 #[serde(default, deny_unknown_fields)]
 pub struct Socket {
    pub socket_type: SocketType,
@@ -107,5 +107,8 @@ enabled = {{ debug.stats_reporting.enabled }}
 provider_address = '{{ debug.stats_reporting.provider_address }}'
 reporting_interval = '{{ debug.stats_reporting.reporting_interval }}'

+[debug.forget_me]
+client = {{ debug.forget_me.client }}
+stats = {{ debug.forget_me.stats }}

 "#;
@@ -20,7 +20,7 @@ pub use nym_sphinx::addressing::clients::Recipient;

 pub mod config;

-type NativeClientBuilder<'a> = BaseClientBuilder<'a, QueryHttpRpcNyxdClient, OnDiskPersistent>;
+type NativeClientBuilder = BaseClientBuilder<QueryHttpRpcNyxdClient, OnDiskPersistent>;

 pub struct SocketClient {
    /// Client configuration options, including, among other things, packet sending rates,
@@ -32,6 +32,10 @@ pub struct SocketClient {
 }

 impl SocketClient {
+    pub fn config(&self) -> Config {
+        self.config.clone()
+    }
+
    pub fn new(config: Config, custom_mixnet: Option<PathBuf>) -> Self {
        SocketClient {
            config,
@@ -45,7 +49,7 @@ impl SocketClient {
        client_output: ClientOutput,
        client_state: ClientState,
        self_address: &Recipient,
-        shutdown: nym_task::TaskClient,
+        task_client: nym_task::TaskClient,
        packet_type: PacketType,
    ) {
        info!("Starting websocket listener...");
@@ -73,10 +77,15 @@ impl SocketClient {
            shared_lane_queue_lengths,
            reply_controller_sender,
            Some(packet_type),
+            task_client.fork("websocket_handler"),
        );

-        websocket::Listener::new(config.socket.host, config.socket.listening_port)
-            .start(websocket_handler, shutdown);
+        websocket::Listener::new(
+            config.socket.host,
+            config.socket.listening_port,
+            task_client.with_suffix("websocket_listener"),
+        )
+        .start(websocket_handler);
    }

    /// blocking version of `start_socket` method. Will run forever (or until SIGINT is sent)
@@ -108,8 +117,9 @@ impl SocketClient {
        let storage = self.initialise_storage().await?;
        let user_agent = nym_bin_common::bin_info!().into();

-        let mut base_client = BaseClientBuilder::new(&self.config.base, storage, dkg_query_client)
-            .with_user_agent(user_agent);
+        let mut base_client =
+            BaseClientBuilder::new(self.config().base(), storage, dkg_query_client)
+                .with_user_agent(user_agent);

        if let Some(custom_mixnet) = &self.custom_mixnet {
            base_client = base_client.with_stored_topology(custom_mixnet)?;
@@ -82,6 +82,7 @@ impl From<Init> for OverrideConfig {
            nyxd_urls: init_config.common_args.nyxd_urls,
            enabled_credentials_mode: init_config.common_args.enabled_credentials_mode,
            stats_reporting_address: init_config.common_args.stats_reporting_address,
+            forget_me: init_config.common_args.forget_me.into(),
        }
    }
 }
@@ -16,6 +16,7 @@ use nym_bin_common::completions::{fig_generate, ArgShell};
 use nym_client::client::Recipient;
 use nym_client_core::cli_helpers::CliClient;
 use nym_client_core::client::base_client::storage::migration_helpers::v1_1_33;
+use nym_client_core::config::ForgetMe;
 use nym_config::OptionalSet;
 use std::error::Error;
 use std::net::IpAddr;
@@ -106,6 +107,7 @@ pub(crate) struct OverrideConfig {
    nyxd_urls: Option<Vec<url::Url>>,
    enabled_credentials_mode: Option<bool>,
    stats_reporting_address: Option<Recipient>,
+    forget_me: ForgetMe,
 }

 pub(crate) async fn execute(args: Cli) -> Result<(), Box<dyn Error + Send + Sync>> {
@@ -133,6 +135,7 @@ pub(crate) fn override_config(config: Config, args: OverrideConfig) -> Config {
            args.fastmode,
        )
        .with_base(BaseClientConfig::with_disabled_cover_traffic, args.no_cover)
+        .with_base(BaseClientConfig::with_forget_me, args.forget_me)
        .with_optional(Config::with_port, args.port)
        .with_optional(Config::with_host, args.host)
        .with_optional_custom_env_ext(
@@ -41,6 +41,7 @@ impl From<Run> for OverrideConfig {
            nyxd_urls: run_config.common_args.nyxd_urls,
            enabled_credentials_mode: run_config.common_args.enabled_credentials_mode,
            stats_reporting_address: run_config.common_args.stats_reporting_address,
+            forget_me: run_config.common_args.forget_me.into(),
        }
    }
 }
@@ -19,6 +19,7 @@ use nym_sphinx::receiver::ReconstructedMessage;
 use nym_task::connections::{
    ConnectionCommand, ConnectionCommandSender, ConnectionId, LaneQueueLengths, TransmissionLane,
 };
+use nym_task::TaskClient;
 use std::time::Duration;
 use tokio::net::TcpStream;
 use tokio::time::Instant;
@@ -43,9 +44,11 @@ pub(crate) struct HandlerBuilder {
    lane_queue_lengths: LaneQueueLengths,
    reply_controller_sender: ReplyControllerSender,
    packet_type: Option<PacketType>,
+    task_client: TaskClient,
 }

 impl HandlerBuilder {
+    #[allow(clippy::too_many_arguments)]
    pub(crate) fn new(
        msg_input: InputMessageSender,
        client_connection_tx: ConnectionCommandSender,
@@ -54,6 +57,7 @@ impl HandlerBuilder {
        lane_queue_lengths: LaneQueueLengths,
        reply_controller_sender: ReplyControllerSender,
        packet_type: Option<PacketType>,
+        task_client: TaskClient,
    ) -> Self {
        Self {
            msg_input,
@@ -63,11 +67,14 @@ impl HandlerBuilder {
            lane_queue_lengths,
            reply_controller_sender,
            packet_type,
+            task_client,
        }
    }

    // TODO: make sure we only ever have one active handler
    pub fn create_active_handler(&self) -> Handler {
+        let mut task_client = self.task_client.fork("active_handler");
+        task_client.disarm();
        Handler {
            msg_input: self.msg_input.clone(),
            client_connection_tx: self.client_connection_tx.clone(),
@@ -78,6 +85,7 @@ impl HandlerBuilder {
            lane_queue_lengths: self.lane_queue_lengths.clone(),
            reply_controller_sender: self.reply_controller_sender.clone(),
            packet_type: self.packet_type,
+            task_client,
        }
    }
 }
@@ -92,16 +100,18 @@ pub(crate) struct Handler {
    lane_queue_lengths: LaneQueueLengths,
    reply_controller_sender: ReplyControllerSender,
    packet_type: Option<PacketType>,
+    task_client: TaskClient,
 }

 impl Drop for Handler {
    fn drop(&mut self) {
-        if self
+        if let Err(err) = self
            .buffer_requester
            .unbounded_send(ReceivedBufferMessage::ReceiverDisconnect)
-            .is_err()
        {
-            error!("we failed to disconnect the receiver from the buffer! presumably the shutdown procedure has been initiated!")
+            if !self.task_client.is_shutdown_poll() {
+                error!("failed to disconnect the receiver from the buffer: {err}");
+            }
        }
    }
 }
@@ -125,10 +135,23 @@ impl Handler {
        };

        // get the number of pending replies waiting for reply surbs
-        let reply_queue_length = self
+        let reply_queue_length = match self
            .reply_controller_sender
            .get_lane_queue_length(connection_id)
-            .await;
+            .await
+        {
+            Ok(length) => length,
+            Err(err) => {
+                if !self.task_client.is_shutdown_poll() {
+                    error!(
+                        "Failed to get reply queue length for connection {connection_id}: {err}"
+                    );
+                }
+                // We're just going to assume that the queue is empty, and I think that's okay
+                // during shutdown.
+                0
+            }
+        };

        let queue_length = base_length + reply_queue_length;

@@ -168,10 +191,11 @@ impl Handler {

        // the ack control is now responsible for chunking, etc.
        let input_msg = InputMessage::new_regular(recipient, message, lane, self.packet_type);
-        self.msg_input
-            .send(input_msg)
-            .await
-            .expect("InputMessageReceiver has stopped receiving!");
+        if let Err(err) = self.msg_input.send(input_msg).await {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send message to the input buffer: {err}");
+            }
+        }

        // Only reply back with a `LaneQueueLength` if the sender providided a connection id
        let TransmissionLane::ConnectionId(connection_id) = lane else {
@@ -200,10 +224,11 @@ impl Handler {

        let input_msg =
            InputMessage::new_anonymous(recipient, message, reply_surbs, lane, self.packet_type);
-        self.msg_input
-            .send(input_msg)
-            .await
-            .expect("InputMessageReceiver has stopped receiving!");
+        if let Err(err) = self.msg_input.send(input_msg).await {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send anonymous message to the input buffer: {err}");
+            }
+        }

        // Only reply back with a `LaneQueueLength` if the sender providided a connection id
        let TransmissionLane::ConnectionId(connection_id) = lane else {
@@ -227,10 +252,11 @@ impl Handler {
        });

        let input_msg = InputMessage::new_reply(recipient_tag, message, lane, self.packet_type);
-        self.msg_input
-            .send(input_msg)
-            .await
-            .expect("InputMessageReceiver has stopped receiving!");
+        if let Err(err) = self.msg_input.send(input_msg).await {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send reply message to the input buffer: {err}");
+            }
+        }

        // Only reply back with a `LaneQueueLength` if the sender providided a connection id
        let TransmissionLane::ConnectionId(connection_id) = lane else {
@@ -245,9 +271,14 @@ impl Handler {
    }

    fn handle_closed_connection(&self, connection_id: u64) -> Option<ServerResponse> {
-        self.client_connection_tx
+        if let Err(err) = self
+            .client_connection_tx
            .unbounded_send(ConnectionCommand::Close(connection_id))
-            .unwrap();
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send close connection command: {err}");
+            }
+        }
        None
    }

@@ -362,11 +393,10 @@ impl Handler {
        }
    }

-    async fn listen_for_requests(
-        &mut self,
-        mut msg_receiver: ReconstructedMessagesReceiver,
-        mut task_client: nym_task::TaskClient,
-    ) {
+    async fn listen_for_requests(&mut self, mut msg_receiver: ReconstructedMessagesReceiver) {
+        let mut task_client = self.task_client.fork("select");
+        task_client.disarm();
+
        while !task_client.is_shutdown() {
            tokio::select! {
                // we can either get a client request from the websocket
@@ -415,15 +445,7 @@ impl Handler {
    }

    // consume self to make sure `drop` is called after this is done
-    pub(crate) async fn handle_connection(
-        mut self,
-        socket: TcpStream,
-        mut task_client: nym_task::TaskClient,
-    ) {
-        // We don't want a crash in the connection handler to trigger a shutdown of the whole
-        // process.
-        task_client.disarm();
-
+    pub(crate) async fn handle_connection(mut self, socket: TcpStream) {
        let ws_stream = match accept_async(socket).await {
            Ok(ws_stream) => ws_stream,
            Err(err) => {
@@ -436,14 +458,18 @@ impl Handler {
        let (reconstructed_sender, reconstructed_receiver) = mpsc::unbounded();

        // tell the buffer to start sending stuff to us
-        self.buffer_requester
-            .unbounded_send(ReceivedBufferMessage::ReceiverAnnounce(
-                reconstructed_sender,
-            ))
-            .expect("the buffer request failed!");
+        if let Err(err) =
+            self.buffer_requester
+                .unbounded_send(ReceivedBufferMessage::ReceiverAnnounce(
+                    reconstructed_sender,
+                ))
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("failed to announce the receiver to the buffer: {err}");
+            }
+        }

-        self.listen_for_requests(reconstructed_receiver, task_client)
-            .await;
+        self.listen_for_requests(reconstructed_receiver).await;
    }
 }

@@ -3,6 +3,7 @@

 use super::handler::HandlerBuilder;
 use log::*;
+use nym_task::TaskClient;
 use std::net::IpAddr;
 use std::{net::SocketAddr, process, sync::Arc};
 use tokio::io::AsyncWriteExt;
@@ -22,21 +23,19 @@ impl State {
 pub(crate) struct Listener {
    address: SocketAddr,
    state: State,
+    task_client: TaskClient,
 }

 impl Listener {
-    pub(crate) fn new(host: IpAddr, port: u16) -> Self {
+    pub(crate) fn new(host: IpAddr, port: u16, task_client: TaskClient) -> Self {
        Listener {
            address: SocketAddr::new(host, port),
            state: State::AwaitingConnection,
+            task_client,
        }
    }

-    pub(crate) async fn run(
-        &mut self,
-        handler: HandlerBuilder,
-        mut task_client: nym_task::TaskClient,
-    ) {
+    pub(crate) async fn run(&mut self, handler: HandlerBuilder) {
        let tcp_listener = match tokio::net::TcpListener::bind(self.address).await {
            Ok(listener) => listener,
            Err(err) => {
@@ -47,11 +46,11 @@ impl Listener {

        let notify = Arc::new(Notify::new());

-        loop {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                // When the handler finishes we check if shutdown is signalled
                _ = notify.notified() => {
-                    if task_client.is_shutdown() {
+                    if self.task_client.is_shutdown() {
                        log::trace!("Websocket listener: detected shutdown after connection closed");
                        break;
                    }
@@ -60,7 +59,7 @@ impl Listener {
                }
                // ... but when there is no connected client at the time of shutdown being
                // signalled, we handle it here.
-                _ = task_client.recv() => {
+                _ = self.task_client.recv() => {
                    if !self.state.is_connected() {
                        log::trace!("Not connected: shutting down");
                        break;
@@ -88,9 +87,8 @@ impl Listener {
                                // hanging because the executor doesn't come back here
                                let notify_clone = Arc::clone(&notify);
                                let fresh_handler = handler.create_active_handler();
-                                let task_client_handler = task_client.clone();
                                tokio::spawn(async move {
-                                    fresh_handler.handle_connection(socket, task_client_handler).await;
+                                    fresh_handler.handle_connection(socket).await;
                                    notify_clone.notify_one();
                                });
                                self.state = State::Connected;
@@ -104,13 +102,9 @@ impl Listener {
        log::debug!("Websocket listener: Exiting");
    }

-    pub(crate) fn start(
-        mut self,
-        handler: HandlerBuilder,
-        shutdown: nym_task::TaskClient,
-    ) -> JoinHandle<()> {
+    pub(crate) fn start(mut self, handler: HandlerBuilder) -> JoinHandle<()> {
        info!("Running websocket on {:?}", self.address.to_string());

-        tokio::spawn(async move { self.run(handler, shutdown).await })
+        tokio::spawn(async move { self.run(handler).await })
    }
 }
@@ -1,6 +1,6 @@
 [package]
 name = "nym-socks5-client"
-version = "1.1.46"
+version = "1.1.48"
 authors = ["Dave Hrycyszyn <futurechimp@users.noreply.github.com>"]
 description = "A SOCKS5 localhost proxy that converts incoming messages to Sphinx and sends them to a Nym address"
 edition = "2021"
@@ -93,6 +93,7 @@ impl From<Init> for OverrideConfig {
            enabled_credentials_mode: init_config.common_args.enabled_credentials_mode,
            outfox: false,
            stats_reporting_address: init_config.common_args.stats_reporting_address,
+            forget_me: init_config.common_args.forget_me.into(),
        }
    }
 }
@@ -17,7 +17,7 @@ use nym_bin_common::completions::{fig_generate, ArgShell};
 use nym_client_core::cli_helpers::CliClient;
 use nym_client_core::client::base_client::storage::migration_helpers::v1_1_33;
 use nym_client_core::client::topology_control::geo_aware_provider::CountryGroup;
-use nym_client_core::config::{GroupBy, TopologyStructure};
+use nym_client_core::config::{ForgetMe, GroupBy, TopologyStructure};
 use nym_config::OptionalSet;
 use nym_sphinx::addressing::Recipient;
 use nym_sphinx::params::{PacketSize, PacketType};
@@ -113,6 +113,7 @@ pub(crate) struct OverrideConfig {
    enabled_credentials_mode: Option<bool>,
    outfox: bool,
    stats_reporting_address: Option<Recipient>,
+    forget_me: ForgetMe,
 }

 pub(crate) async fn execute(args: Cli) -> Result<(), Box<dyn Error + Send + Sync>> {
@@ -179,6 +180,7 @@ pub(crate) fn override_config(config: Config, args: OverrideConfig) -> Config {
            BaseClientConfig::with_topology_structure,
            topology_structure,
        )
+        .with_base(BaseClientConfig::with_forget_me, args.forget_me)
        .with_optional(Config::with_anonymous_replies, args.use_anonymous_replies)
        .with_optional(Config::with_port, args.port)
        .with_optional(Config::with_ip, args.ip)
@@ -65,6 +65,7 @@ impl From<Run> for OverrideConfig {
            enabled_credentials_mode: run_config.common_args.enabled_credentials_mode,
            outfox: run_config.outfox,
            stats_reporting_address: run_config.common_args.stats_reporting_address,
+            forget_me: run_config.common_args.forget_me.into(),
        }
    }
 }
@@ -113,4 +113,8 @@ enabled = {{ core.debug.stats_reporting.enabled }}
 provider_address = '{{ core.debug.stats_reporting.provider_address }}'
 reporting_interval = '{{ core.debug.stats_reporting.reporting_interval }}'

+[core.debug.forget_me]
+client = {{ core.debug.forget_me.client }}
+stats = {{ core.debug.forget_me.stats }}
+
 "#;
@@ -60,7 +60,7 @@ impl From<IpAddr> for IpPair {
            std::net::IpAddr::V4(ipv4_addr) => (ipv4_addr.octets()[2], ipv4_addr.octets()[3]),
            std::net::IpAddr::V6(ipv6_addr) => (ipv6_addr.octets()[14], ipv6_addr.octets()[15]),
        };
-        let last_bytes = (before_last_byte as u16) << 8 | last_byte as u16;
+        let last_bytes = ((before_last_byte as u16) << 8) | last_byte as u16;
        let ipv4 = Ipv4Addr::new(
            WG_TUN_DEVICE_IP_ADDRESS_V4.octets()[0],
            WG_TUN_DEVICE_IP_ADDRESS_V4.octets()[1],
@@ -40,6 +40,7 @@ nym-crypto = { path = "../crypto" }
 nym-explorer-client = { path = "../../explorer-api/explorer-client" }
 nym-gateway-client = { path = "../client-libs/gateway-client" }
 nym-gateway-requests = { path = "../gateway-requests" }
+nym-http-api-client = { path = "../http-api-client" }
 nym-metrics = { path = "../nym-metrics" }
 nym-nonexhaustive-delayqueue = { path = "../nonexhaustive-delayqueue" }
 nym-sphinx = { path = "../nymsphinx" }
@@ -145,6 +145,11 @@ impl Config {
        self
    }

+    pub fn with_forget_me(mut self, forget_me: ForgetMe) -> Self {
+        self.debug.forget_me = forget_me;
+        self
+    }
+
    // TODO: this should be refactored properly
    // as of 12.09.23 the below is true (not sure how this comment will rot in the future)
    // medium_toggle:
@@ -517,7 +522,7 @@ impl Default for Acknowledgements {
 }

 #[derive(Debug, Clone, Copy, Deserialize, PartialEq, Serialize)]
-#[serde(default, deny_unknown_fields)]
+#[serde(default)]
 pub struct Topology {
    /// The uniform delay every which clients are querying the directory server
    /// to try to obtain a compatible network topology to send sphinx packets through.
@@ -558,6 +563,10 @@ pub struct Topology {
    /// Specifies whether this client should ignore the current epoch role of the target egress node
    /// when constructing the final hop packets.
    pub ignore_egress_epoch_role: bool,
+
+    /// Specifies whether this client should ignore the current epoch role of the ingress node
+    /// when attempting to establish new connection
+    pub ignore_ingress_epoch_role: bool,
 }

 #[allow(clippy::large_enum_variant)]
@@ -595,7 +604,9 @@ impl Default for Topology {
            minimum_mixnode_performance: DEFAULT_MIN_MIXNODE_PERFORMANCE,
            minimum_gateway_performance: DEFAULT_MIN_GATEWAY_PERFORMANCE,
            use_extended_topology: false,
-            ignore_egress_epoch_role: false,
+
+            ignore_egress_epoch_role: true,
+            ignore_ingress_epoch_role: true,
        }
    }
 }
@@ -713,6 +724,9 @@ pub struct DebugConfig {

    /// Defines all configuration options related to stats reporting.
    pub stats_reporting: StatsReporting,
+
+    /// Defines all configuration options related to the forget me flag.
+    pub forget_me: ForgetMe,
 }

 impl DebugConfig {
@@ -735,6 +749,69 @@ impl Default for DebugConfig {
            topology: Default::default(),
            reply_surbs: Default::default(),
            stats_reporting: Default::default(),
+            forget_me: Default::default(),
+        }
+    }
+}
+
+#[derive(Clone, Default, Debug, Deserialize, PartialEq, Serialize, Copy)]
+pub struct ForgetMe {
+    client: bool,
+    stats: bool,
+}
+
+impl From<bool> for ForgetMe {
+    fn from(value: bool) -> Self {
+        if value {
+            Self::new_all()
+        } else {
+            Self::new_none()
+        }
+    }
+}
+
+impl ForgetMe {
+    pub fn new_all() -> Self {
+        Self {
+            client: true,
+            stats: true,
+        }
+    }
+
+    pub fn new_client() -> Self {
+        Self {
+            client: true,
+            stats: false,
+        }
+    }
+
+    pub fn new_stats() -> Self {
+        Self {
+            client: false,
+            stats: true,
+        }
+    }
+
+    pub fn new(client: bool, stats: bool) -> Self {
+        Self { client, stats }
+    }
+
+    pub fn any(&self) -> bool {
+        self.client || self.stats
+    }
+
+    pub fn client(&self) -> bool {
+        self.client
+    }
+
+    pub fn stats(&self) -> bool {
+        self.stats
+    }
+
+    pub fn new_none() -> Self {
+        Self {
+            client: false,
+            stats: false,
        }
    }
 }
@@ -182,7 +182,7 @@ impl From<ConfigV5> for Config {
                    maximum_reply_key_age: value.debug.reply_surbs.maximum_reply_key_age,
                    surb_mix_hops: value.debug.reply_surbs.surb_mix_hops,
                },
-                stats_reporting: Default::default(),
+                ..Default::default()
            },
        }
    }
@@ -120,6 +120,7 @@ where
            &core.client.nym_api_urls,
            user_agent,
            core.debug.topology.minimum_gateway_performance,
+            core.debug.topology.ignore_ingress_epoch_role,
        )
        .await?
    };
@@ -93,6 +93,10 @@ pub struct CommonClientInitArgs {
    /// Sets the address to report statistics
    #[cfg_attr(feature = "cli", clap(long, hide = true))]
    pub stats_reporting_address: Option<Recipient>,
+
+    /// Sets the forget me flag
+    #[cfg_attr(feature = "cli", clap(long, hide = true, default_value_t = false))]
+    pub forget_me: bool,
 }

 pub struct InitResultsWithConfig<T> {
@@ -175,6 +179,7 @@ where
            &core.client.nym_api_urls,
            user_agent,
            core.debug.topology.minimum_gateway_performance,
+            core.debug.topology.ignore_ingress_epoch_role,
        )
        .await?
    };
@@ -61,4 +61,8 @@ pub struct CommonClientRunArgs {
    /// Sets the address to report statistics
    #[cfg_attr(feature = "cli", clap(long, hide = true))]
    pub stats_reporting_address: Option<Recipient>,
+
+    /// Sets the forget me flag
+    #[cfg_attr(feature = "cli", clap(long, hide = true, default_value_t = false))]
+    pub forget_me: bool,
 }
@@ -1,6 +1,7 @@
 // Copyright 2022-2023 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0

+use super::mix_traffic::ClientRequestSender;
 use super::received_buffer::ReceivedBufferMessage;
 use super::statistics_control::StatisticsControl;
 use crate::client::base_client::storage::helpers::store_client_keys;
@@ -31,13 +32,15 @@ use crate::init::{
    setup_gateway,
    types::{GatewaySetup, InitialisationResult},
 };
-use crate::{config, spawn_future, ForgetMe};
+use crate::{config, spawn_future};
 use futures::channel::mpsc;
 use log::*;
 use nym_bandwidth_controller::BandwidthController;
+use nym_client_core_config_types::ForgetMe;
 use nym_client_core_gateways_storage::{GatewayDetails, GatewaysDetailsStore};
 use nym_credential_storage::storage::Storage as CredentialStorage;
 use nym_crypto::asymmetric::{encryption, identity};
+use nym_crypto::hkdf::DerivationMaterial;
 use nym_gateway_client::client::config::GatewayClientConfig;
 use nym_gateway_client::{
    AcknowledgementReceiver, GatewayClient, GatewayConfig, MixnetMessageReceiver, PacketRouter,
@@ -175,8 +178,8 @@ impl From<bool> for CredentialsToggle {
    }
 }

-pub struct BaseClientBuilder<'a, C, S: MixnetClientStorage> {
-    config: &'a Config,
+pub struct BaseClientBuilder<C, S: MixnetClientStorage> {
+    config: Config,
    client_store: S,
    dkg_query_client: Option<C>,

@@ -191,19 +194,19 @@ pub struct BaseClientBuilder<'a, C, S: MixnetClientStorage> {
    #[cfg(unix)]
    connection_fd_callback: Option<Arc<dyn Fn(RawFd) + Send + Sync>>,

-    forget_me: ForgetMe,
+    derivation_material: Option<DerivationMaterial>,
 }

-impl<'a, C, S> BaseClientBuilder<'a, C, S>
+impl<C, S> BaseClientBuilder<C, S>
 where
    S: MixnetClientStorage + 'static,
    C: DkgQueryClient + Send + Sync + 'static,
 {
    pub fn new(
-        base_config: &'a Config,
+        base_config: Config,
        client_store: S,
        dkg_query_client: Option<C>,
-    ) -> BaseClientBuilder<'a, C, S> {
+    ) -> BaseClientBuilder<C, S> {
        BaseClientBuilder {
            config: base_config,
            client_store,
@@ -216,13 +219,22 @@ where
            setup_method: GatewaySetup::MustLoad { gateway_id: None },
            #[cfg(unix)]
            connection_fd_callback: None,
-            forget_me: Default::default(),
+            derivation_material: None,
        }
    }

+    #[must_use]
+    pub fn with_derivation_material(
+        mut self,
+        derivation_material: Option<DerivationMaterial>,
+    ) -> Self {
+        self.derivation_material = derivation_material;
+        self
+    }
+
    #[must_use]
    pub fn with_forget_me(mut self, forget_me: &ForgetMe) -> Self {
-        self.forget_me = forget_me.clone();
+        self.config.debug.forget_me = *forget_me;
        self
    }

@@ -298,7 +310,7 @@ where
        topology_accessor: TopologyAccessor,
        mix_tx: BatchMixMessageSender,
        stats_tx: ClientStatsSender,
-        shutdown: TaskClient,
+        task_client: TaskClient,
    ) {
        info!("Starting loop cover traffic stream...");

@@ -311,9 +323,10 @@ where
            debug_config.traffic,
            debug_config.cover_traffic,
            stats_tx,
+            task_client,
        );

-        stream.start_with_shutdown(shutdown);
+        stream.start();
    }

    #[allow(clippy::too_many_arguments)]
@@ -328,7 +341,7 @@ where
        reply_controller_receiver: ReplyControllerReceiver,
        lane_queue_lengths: LaneQueueLengths,
        client_connection_rx: ConnectionCommandReceiver,
-        shutdown: TaskClient,
+        task_client: TaskClient,
        packet_type: PacketType,
        stats_tx: ClientStatsSender,
    ) {
@@ -346,8 +359,9 @@ where
            lane_queue_lengths,
            client_connection_rx,
            stats_tx,
+            task_client,
        )
-        .start_with_shutdown(shutdown, packet_type);
+        .start(packet_type);
    }

    // buffer controlling all messages fetched from provider
@@ -370,8 +384,9 @@ where
                reply_key_storage,
                reply_controller_sender,
                metrics_reporter,
+                shutdown,
            );
-        controller.start_with_shutdown(shutdown)
+        controller.start()
    }

    #[allow(clippy::too_many_arguments)]
@@ -560,15 +575,22 @@ where
        topology_accessor: TopologyAccessor,
        local_gateway: NodeIdentity,
        wait_for_gateway: bool,
-        mut shutdown: TaskClient,
+        mut task_client: TaskClient,
    ) -> Result<(), ClientCoreError> {
        let topology_refresher_config =
            TopologyRefresherConfig::new(topology_config.topology_refresh_rate);

+        if topology_config.disable_refreshing {
+            // if we're not spawning the refresher, don't cause shutdown immediately
+            info!("The background topology refesher is not going to be started");
+            task_client.disarm();
+        }
+
        let mut topology_refresher = TopologyRefresher::new(
            topology_refresher_config,
            topology_accessor,
            topology_provider,
+            task_client,
        );
        // before returning, block entire runtime to refresh the current network view so that any
        // components depending on topology would see a non-empty view
@@ -609,15 +631,11 @@ where
            }
        }

-        if topology_config.disable_refreshing {
-            // if we're not spawning the refresher, don't cause shutdown immediately
-            info!("The topology refesher is not going to be started");
-            shutdown.disarm();
-        } else {
+        if !topology_config.disable_refreshing {
            // don't spawn the refresher if we don't want to be refreshing the topology.
            // only use the initial values obtained
            info!("Starting topology refresher...");
-            topology_refresher.start_with_shutdown(shutdown);
+            topology_refresher.start();
        }

        Ok(())
@@ -628,30 +646,29 @@ where
        user_agent: Option<UserAgent>,
        client_stats_id: String,
        input_sender: Sender<InputMessage>,
-        shutdown: TaskClient,
+        task_client: TaskClient,
    ) -> ClientStatsSender {
        info!("Starting statistics control...");
-        StatisticsControl::create_and_start_with_shutdown(
+        StatisticsControl::create_and_start(
            config.debug.stats_reporting,
            user_agent
                .map(|u| u.application)
                .unwrap_or("unknown".to_string()),
            client_stats_id,
            input_sender.clone(),
-            shutdown.with_suffix("controller"),
+            task_client,
        )
    }

    fn start_mix_traffic_controller(
        gateway_transceiver: Box<dyn GatewayTransceiver + Send>,
        shutdown: TaskClient,
-        forget_me: ForgetMe,
-    ) -> BatchMixMessageSender {
+    ) -> (BatchMixMessageSender, ClientRequestSender) {
        info!("Starting mix traffic controller...");
-        let (mix_traffic_controller, mix_tx) =
-            MixTrafficController::new(gateway_transceiver, forget_me);
-        mix_traffic_controller.start_with_shutdown(shutdown);
-        mix_tx
+        let (mix_traffic_controller, mix_tx, client_tx) =
+            MixTrafficController::new(gateway_transceiver, shutdown);
+        mix_traffic_controller.start();
+        (mix_tx, client_tx)
    }

    // TODO: rename it as it implies the data is persistent whilst one can use InMemBackend
@@ -686,6 +703,7 @@ where
        setup_method: GatewaySetup,
        key_store: &S::KeyStore,
        details_store: &S::GatewaysDetailsStore,
+        derivation_material: Option<DerivationMaterial>,
    ) -> Result<InitialisationResult, ClientCoreError>
    where
        <S::KeyStore as KeyStore>::StorageError: Sync + Send,
@@ -695,7 +713,12 @@ where
        if key_store.load_keys().await.is_err() {
            info!("could not find valid client keys - a new set will be generated");
            let mut rng = OsRng;
-            let keys = ClientKeys::generate_new(&mut rng);
+            let keys = if let Some(derivation_material) = derivation_material {
+                ClientKeys::from_master_key(&mut rng, &derivation_material)
+                    .map_err(|_| ClientCoreError::HkdfDerivationError {})?
+            } else {
+                ClientKeys::generate_new(&mut rng)
+            };
            store_client_keys(keys, key_store).await?;
        }

@@ -717,6 +740,7 @@ where
            self.setup_method,
            self.client_store.key_store(),
            self.client_store.gateway_details_store(),
+            self.derivation_material,
        )
        .await?;

@@ -773,7 +797,7 @@ where
        );

        let stats_reporter = Self::start_statistics_control(
-            self.config,
+            &self.config,
            self.user_agent.clone(),
            generate_client_stats_id(*self_address.identity()),
            input_sender.clone(),
@@ -799,7 +823,7 @@ where

        let gateway_transceiver = Self::setup_gateway_transceiver(
            self.custom_gateway_transceiver,
-            self.config,
+            &self.config,
            init_res,
            bandwidth_controller,
            &details_store,
@@ -833,10 +857,9 @@ where
        // traffic stream.
        // The MixTrafficController then sends the actual traffic

-        let message_sender = Self::start_mix_traffic_controller(
+        let (message_sender, client_request_sender) = Self::start_mix_traffic_controller(
            gateway_transceiver,
            shutdown.fork("mix_traffic_controller"),
-            self.forget_me,
        );

        // Channels that the websocket listener can use to signal downstream to the real traffic
@@ -911,6 +934,8 @@ where
            },
            stats_reporter,
            task_handle: shutdown,
+            client_request_sender,
+            forget_me: self.config.debug.forget_me,
        })
    }
 }
@@ -922,6 +947,7 @@ pub struct BaseClient {
    pub client_output: ClientOutputStatus,
    pub client_state: ClientState,
    pub stats_reporter: ClientStatsSender,
-
+    pub client_request_sender: ClientRequestSender,
    pub task_handle: TaskHandle,
+    pub forget_me: ForgetMe,
 }
@@ -4,6 +4,8 @@
 // TODO: combine those more closely. Perhaps into a single underlying store.
 // Like for persistent, on-disk, storage, what's the point of having 3 different databases?

+use rand::rngs::OsRng;
+
 use crate::client::key_manager::persistence::{InMemEphemeralKeys, KeyStore};
 use crate::client::replies::reply_storage;
 use crate::client::replies::reply_storage::ReplyStorageBackend;
@@ -63,7 +65,7 @@ pub trait MixnetClientStorage {
    fn gateway_details_store(&self) -> &Self::GatewaysDetailsStore;
 }

-#[derive(Clone, Default)]
+#[derive(Clone)]
 pub struct Ephemeral {
    key_store: InMemEphemeralKeys,
    reply_store: reply_storage::Empty,
@@ -71,9 +73,14 @@ pub struct Ephemeral {
    gateway_details_store: InMemGatewaysDetails,
 }

-impl Ephemeral {
-    pub fn new() -> Self {
-        Default::default()
+impl Default for Ephemeral {
+    fn default() -> Self {
+        Ephemeral {
+            key_store: InMemEphemeralKeys::new(&mut OsRng),
+            reply_store: Default::default(),
+            credential_store: Default::default(),
+            gateway_details_store: Default::default(),
+        }
    }
 }

@@ -13,6 +13,7 @@ use nym_sphinx::cover::generate_loop_cover_packet;
 use nym_sphinx::params::{PacketSize, PacketType};
 use nym_sphinx::utils::sample_poisson_duration;
 use nym_statistics_common::clients::{packet_statistics::PacketStatisticsEvent, ClientStatsSender};
+use nym_task::TaskClient;
 use rand::{rngs::OsRng, CryptoRng, Rng};
 use std::pin::Pin;
 use std::sync::Arc;
@@ -64,6 +65,8 @@ where
    packet_type: PacketType,

    stats_tx: ClientStatsSender,
+
+    task_client: TaskClient,
 }

 impl<R> Stream for LoopCoverTrafficStream<R>
@@ -110,6 +113,7 @@ impl LoopCoverTrafficStream<OsRng> {
        traffic_config: config::Traffic,
        cover_config: config::CoverTraffic,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        let rng = OsRng;

@@ -128,6 +132,7 @@ impl LoopCoverTrafficStream<OsRng> {
            secondary_packet_size: traffic_config.secondary_packet_size,
            packet_type: traffic_config.packet_type,
            stats_tx,
+            task_client,
        }
    }

@@ -175,7 +180,7 @@ impl LoopCoverTrafficStream<OsRng> {
            }
        };

-        let cover_message = generate_loop_cover_packet(
+        let cover_message = match generate_loop_cover_packet(
            &mut self.rng,
            topology_ref,
            &self.ack_key,
@@ -184,8 +189,15 @@ impl LoopCoverTrafficStream<OsRng> {
            self.cover_traffic.loop_cover_traffic_average_delay,
            cover_traffic_packet_size,
            self.packet_type,
-        )
-        .expect("Somehow failed to generate a loop cover message with a valid topology");
+        ) {
+            Ok(cover_message) => cover_message,
+            Err(err) => {
+                warn!(
+                    "Somehow failed to generate a loop cover message with a valid topology: {err}"
+                );
+                return;
+            }
+        };

        if let Err(err) = self.mix_tx.try_send(vec![cover_message]) {
            match err {
@@ -217,7 +229,7 @@ impl LoopCoverTrafficStream<OsRng> {
        tokio::task::yield_now().await;
    }

-    pub fn start_with_shutdown(mut self, mut shutdown: nym_task::TaskClient) {
+    pub fn start(mut self) {
        if self.cover_traffic.disable_loop_cover_traffic_stream {
            // we should have never got here in the first place - the task should have never been created to begin with
            // so panic and review the code that lead to this branch
@@ -231,6 +243,8 @@ impl LoopCoverTrafficStream<OsRng> {
        );
        self.set_next_delay(sampled);

+        let mut shutdown = self.task_client.fork("select");
+
        spawn_future(async move {
            debug!("Started LoopCoverTrafficStream with graceful shutdown support");

@@ -2,7 +2,10 @@
 // SPDX-License-Identifier: Apache-2.0

 use crate::client::key_manager::persistence::KeyStore;
-use nym_crypto::asymmetric::{encryption, identity};
+use nym_crypto::{
+    asymmetric::{encryption, identity},
+    hkdf::{DerivationMaterial, InvalidLength},
+};
 use nym_gateway_requests::shared_key::{LegacySharedKeys, SharedGatewayKey, SharedSymmetricKey};
 use nym_sphinx::acknowledgements::AckKey;
 use rand::{CryptoRng, RngCore};
@@ -10,6 +13,7 @@ use std::sync::Arc;
 use zeroize::ZeroizeOnDrop;

 pub mod persistence;
+mod test;

 // Note: to support key rotation in the future, all keys will require adding an extra smart pointer,
 // most likely an AtomicCell, or if it doesn't work as I think it does, a Mutex. Although I think
@@ -43,6 +47,24 @@ impl ClientKeys {
        }
    }

+    pub fn from_master_key<R>(
+        rng: &mut R,
+        derivation_material: &DerivationMaterial,
+    ) -> Result<Self, InvalidLength>
+    where
+        R: RngCore + CryptoRng,
+    {
+        let secret = derivation_material.derive_secret()?;
+        Ok(ClientKeys {
+            identity_keypair: Arc::new(identity::KeyPair::from_secret(
+                secret,
+                derivation_material.index(),
+            )),
+            encryption_keypair: Arc::new(encryption::KeyPair::new(rng)),
+            ack_key: Arc::new(AckKey::new(rng)),
+        })
+    }
+
    pub fn from_keys(
        id_keypair: identity::KeyPair,
        enc_keypair: encryption::KeyPair,
@@ -3,6 +3,7 @@

 use crate::client::key_manager::ClientKeys;
 use async_trait::async_trait;
+use rand::{CryptoRng, RngCore};
 use std::error::Error;
 use std::sync::Arc;
 use tokio::sync::Mutex;
@@ -195,9 +196,20 @@ impl KeyStore for OnDiskKeys {
    }
 }

-#[derive(Clone, Default)]
+#[derive(Clone)]
 pub struct InMemEphemeralKeys {
-    keys: Arc<Mutex<Option<ClientKeys>>>,
+    keys: Arc<Mutex<ClientKeys>>,
+}
+
+impl InMemEphemeralKeys {
+    pub fn new<R>(rng: &mut R) -> Self
+    where
+        R: RngCore + CryptoRng,
+    {
+        InMemEphemeralKeys {
+            keys: Arc::new(Mutex::new(ClientKeys::generate_new(rng))),
+        }
+    }
 }

 #[derive(Debug, thiserror::Error)]
@@ -210,11 +222,11 @@ impl KeyStore for InMemEphemeralKeys {
    type StorageError = EphemeralKeysError;

    async fn load_keys(&self) -> Result<ClientKeys, Self::StorageError> {
-        self.keys.lock().await.clone().ok_or(EphemeralKeysError)
+        Ok(self.keys.lock().await.clone())
    }

    async fn store_keys(&self, keys: &ClientKeys) -> Result<(), Self::StorageError> {
-        *self.keys.lock().await = Some(keys.clone());
+        *self.keys.lock().await = keys.clone();
        Ok(())
    }
 }
@@ -0,0 +1,89 @@
+#[cfg(test)]
+mod tests {
+    use crate::client::key_manager::ClientKeys;
+    use nym_crypto::hkdf::DerivationMaterial;
+    use rand::SeedableRng;
+    use rand_chacha::ChaCha20Rng;
+
+    #[test]
+    fn test_from_master_key_success() {
+        // Set up a deterministic RNG.
+        let seed = [33u8; 32];
+        let mut rng = ChaCha20Rng::from_seed(seed);
+
+        // Set up the derivation material.
+        let master_key = b"this is a secret master key";
+        let salt = b"unique-salt";
+        let derivation_material = DerivationMaterial::new(master_key, 0, salt);
+
+        // Generate ClientKeys from the master key.
+        let client_keys = ClientKeys::from_master_key(&mut rng, &derivation_material)
+            .expect("Failed to create client keys");
+
+        assert_eq!(
+            client_keys.identity_keypair().public_key().to_string(),
+            String::from("FX4Undr5LPPBA7zThWWpAKXKQTXSbW1C28PnxbCqUkU4")
+        );
+
+        assert_eq!(
+            client_keys.identity_keypair().private_key().to_string(),
+            String::from("6S3uMi2rU5SwyUUYCiMrF5qqdcYnEDMYLggBSvavVzEt")
+        );
+    }
+
+    #[test]
+    fn test_from_master_key_deterministic_identity() {
+        // Using identical derivation material should result in the exactly same identity keypair.
+        let seed = [1u8; 32];
+        let mut rng1 = ChaCha20Rng::from_seed(seed);
+        let mut rng2 = ChaCha20Rng::from_seed(seed);
+
+        let master_key = b"another secret master key";
+        let salt = b"deterministic-salt";
+        let index = 7u32;
+        let derivation_material = DerivationMaterial::new(master_key, index, salt);
+
+        let client_keys1 = ClientKeys::from_master_key(&mut rng1, &derivation_material)
+            .expect("Failed to create client keys (first instance)");
+        let client_keys2 = ClientKeys::from_master_key(&mut rng2, &derivation_material)
+            .expect("Failed to create client keys (second instance)");
+
+        assert_eq!(
+            client_keys1.identity_keypair().public_key().to_string(),
+            client_keys2.identity_keypair().public_key().to_string()
+        );
+
+        assert_eq!(
+            client_keys1.identity_keypair().private_key().to_string(),
+            client_keys2.identity_keypair().private_key().to_string()
+        );
+    }
+
+    #[test]
+    fn test_from_master_key_different_indices() {
+        // Changing the index should yield a different identity key.
+        let seed = [5u8; 32];
+        let mut rng = ChaCha20Rng::from_seed(seed);
+
+        let master_key = b"same secret key";
+        let salt = b"same-salt";
+
+        let derivation_material1 = DerivationMaterial::new(master_key, 1, salt);
+        let derivation_material2 = DerivationMaterial::new(master_key, 2, salt);
+
+        let client_keys1 = ClientKeys::from_master_key(&mut rng, &derivation_material1)
+            .expect("Failed to create client keys for index 1");
+        let client_keys2 = ClientKeys::from_master_key(&mut rng, &derivation_material2)
+            .expect("Failed to create client keys for index 2");
+
+        assert_ne!(
+            client_keys1.identity_keypair().public_key().to_string(),
+            client_keys2.identity_keypair().public_key().to_string()
+        );
+
+        assert_ne!(
+            client_keys1.identity_keypair().private_key().to_string(),
+            client_keys2.identity_keypair().private_key().to_string()
+        );
+    }
+}
@@ -2,13 +2,18 @@
 // SPDX-License-Identifier: Apache-2.0

 use crate::client::mix_traffic::transceiver::GatewayTransceiver;
-use crate::{spawn_future, ForgetMe};
+use crate::error::ClientCoreError;
+use crate::spawn_future;
 use log::*;
 use nym_gateway_requests::ClientRequest;
 use nym_sphinx::forwarding::packet::MixPacket;
+use nym_task::TaskClient;
+use transceiver::ErasedGatewayError;

 pub type BatchMixMessageSender = tokio::sync::mpsc::Sender<Vec<MixPacket>>;
 pub type BatchMixMessageReceiver = tokio::sync::mpsc::Receiver<Vec<MixPacket>>;
+pub type ClientRequestReceiver = tokio::sync::mpsc::Receiver<ClientRequest>;
+pub type ClientRequestSender = tokio::sync::mpsc::Sender<ClientRequest>;

 pub mod transceiver;

@@ -23,52 +28,73 @@ pub struct MixTrafficController {
    gateway_transceiver: Box<dyn GatewayTransceiver + Send>,

    mix_rx: BatchMixMessageReceiver,
+    client_rx: ClientRequestReceiver,

    // TODO: this is temporary work-around.
    // in long run `gateway_client` will be moved away from `MixTrafficController` anyway.
    consecutive_gateway_failure_count: usize,
-    forget_me: ForgetMe,
+
+    task_client: TaskClient,
 }

 impl MixTrafficController {
    pub fn new<T>(
        gateway_transceiver: T,
-        forget_me: ForgetMe,
-    ) -> (MixTrafficController, BatchMixMessageSender)
+        task_client: TaskClient,
+    ) -> (
+        MixTrafficController,
+        BatchMixMessageSender,
+        ClientRequestSender,
+    )
    where
        T: GatewayTransceiver + Send + 'static,
    {
        let (message_sender, message_receiver) =
            tokio::sync::mpsc::channel(MIX_MESSAGE_RECEIVER_BUFFER_SIZE);
+
+        let (client_sender, client_receiver) = tokio::sync::mpsc::channel(1);
+
        (
            MixTrafficController {
                gateway_transceiver: Box::new(gateway_transceiver),
                mix_rx: message_receiver,
+                client_rx: client_receiver,
                consecutive_gateway_failure_count: 0,
-                forget_me,
+                task_client,
            },
            message_sender,
+            client_sender,
        )
    }

    pub fn new_dynamic(
        gateway_transceiver: Box<dyn GatewayTransceiver + Send>,
-        forget_me: ForgetMe,
-    ) -> (MixTrafficController, BatchMixMessageSender) {
+        task_client: TaskClient,
+    ) -> (
+        MixTrafficController,
+        BatchMixMessageSender,
+        ClientRequestSender,
+    ) {
        let (message_sender, message_receiver) =
            tokio::sync::mpsc::channel(MIX_MESSAGE_RECEIVER_BUFFER_SIZE);
+        let (client_sender, client_receiver) = tokio::sync::mpsc::channel(1);
        (
            MixTrafficController {
                gateway_transceiver,
                mix_rx: message_receiver,
+                client_rx: client_receiver,
                consecutive_gateway_failure_count: 0,
-                forget_me,
+                task_client,
            },
            message_sender,
+            client_sender,
        )
    }

-    async fn on_messages(&mut self, mut mix_packets: Vec<MixPacket>) {
+    async fn on_messages(
+        &mut self,
+        mut mix_packets: Vec<MixPacket>,
+    ) -> Result<(), ErasedGatewayError> {
        debug_assert!(!mix_packets.is_empty());

        let result = if mix_packets.len() == 1 {
@@ -80,64 +106,60 @@ impl MixTrafficController {
                .await
        };

-        match result {
-            Err(err) => {
-                error!("Failed to send sphinx packet(s) to the gateway: {err}");
-                self.consecutive_gateway_failure_count += 1;
-                if self.consecutive_gateway_failure_count == MAX_FAILURE_COUNT {
-                    // todo: in the future this should initiate a 'graceful' shutdown or try
-                    // to reconnect?
-                    panic!("failed to send sphinx packet to the gateway {MAX_FAILURE_COUNT} times in a row - assuming the gateway is dead. Can't do anything about it yet :(")
-                }
-            }
-            Ok(_) => {
-                trace!("We *might* have managed to forward sphinx packet(s) to the gateway!");
-                self.consecutive_gateway_failure_count = 0;
-            }
+        if result.is_err() {
+            self.consecutive_gateway_failure_count += 1;
+        } else {
+            trace!("We *might* have managed to forward sphinx packet(s) to the gateway!");
+            self.consecutive_gateway_failure_count = 0;
        }
+
+        result
    }

-    pub fn start_with_shutdown(mut self, mut shutdown: nym_task::TaskClient) {
+    pub fn start(mut self) {
        spawn_future(async move {
            debug!("Started MixTrafficController with graceful shutdown support");

-            loop {
+            while !self.task_client.is_shutdown() {
                tokio::select! {
                    mix_packets = self.mix_rx.recv() => match mix_packets {
                        Some(mix_packets) => {
-                            self.on_messages(mix_packets).await;
+                            if let Err(err) = self.on_messages(mix_packets).await {
+                                error!("Failed to send sphinx packet(s) to the gateway: {err}");
+                                if self.consecutive_gateway_failure_count == MAX_FAILURE_COUNT {
+                                    // Disconnect from the gateway. If we should try to re-connect
+                                    // is handled at a higher layer.
+                                    error!("Failed to send sphinx packet to the gateway {MAX_FAILURE_COUNT} times in a row - assuming the gateway is dead");
+                                    // Do we need to handle the embedded mixnet client case
+                                    // separately?
+                                    self.task_client.send_we_stopped(Box::new(ClientCoreError::GatewayFailedToForwardMessages));
+                                    break;
+                                }
+                            }
                        },
                        None => {
                            log::trace!("MixTrafficController: Stopping since channel closed");
                            break;
                        }
                    },
-                    _ = shutdown.recv_with_delay() => {
+                    client_request = self.client_rx.recv() => match client_request {
+                        Some(client_request) => {
+                            match self.gateway_transceiver.send_client_request(client_request).await {
+                                Ok(_) => (),
+                                Err(e) => error!("Failed to send client request: {}", e),
+                            };
+                        },
+                        None => {
+                            log::trace!("MixTrafficController, client request channel closed");
+                        }
+                    },
+                    _ = self.task_client.recv() => {
                        log::trace!("MixTrafficController: Received shutdown");
                        break;
                    }
                }
            }
-            shutdown.recv_timeout().await;
-
-            if self.forget_me.any() {
-                log::info!("Sending forget me request to the gateway");
-                match self
-                    .gateway_transceiver
-                    .send_client_request(ClientRequest::ForgetMe {
-                        client: self.forget_me.client(),
-                        stats: self.forget_me.stats(),
-                    })
-                    .await
-                {
-                    Ok(_) => {
-                        log::info!("Successfully sent forget me request to the gateway");
-                    }
-                    Err(err) => {
-                        log::error!("Failed to send forget me request to the gateway: {err}");
-                    }
-                }
-            }
+            self.task_client.recv_timeout().await;

            log::debug!("MixTrafficController: Exiting");
        });
@@ -86,7 +86,9 @@ impl<G: GatewayTransceiver + ?Sized + Send> GatewayTransceiver for Box<G> {
        &mut self,
        message: ClientRequest,
    ) -> Result<(), GatewayClientError> {
-        (**self).send_client_request(message).await
+        let _ = (**self).send_client_request(message.clone()).await?;
+        log::debug!("Sent client request: {:?}", message);
+        Ok(())
    }
 }

@@ -143,14 +145,7 @@ where
        &mut self,
        message: ClientRequest,
    ) -> Result<(), GatewayClientError> {
-        if let Some(shared_key) = self.gateway_client.shared_key() {
-            self.gateway_client
-                .send_websocket_message(message.encrypt(&*shared_key)?)
-                .await?;
-            Ok(())
-        } else {
-            Err(GatewayClientError::ConnectionInInvalidState)
-        }
+        self.gateway_client.send_client_request(message).await
    }
 }

@@ -11,6 +11,7 @@ use nym_sphinx::{
    acknowledgements::{identifier::recover_identifier, AckKey},
    chunking::fragment::{FragmentIdentifier, COVER_FRAG_ID},
 };
+use nym_task::TaskClient;
 use std::sync::Arc;

 /// Module responsible for listening for any data resembling acknowledgements from the network
@@ -20,6 +21,7 @@ pub(super) struct AcknowledgementListener {
    ack_receiver: AcknowledgementReceiver,
    action_sender: AckActionSender,
    stats_tx: ClientStatsSender,
+    task_client: TaskClient,
 }

 impl AcknowledgementListener {
@@ -28,12 +30,14 @@ impl AcknowledgementListener {
        ack_receiver: AcknowledgementReceiver,
        action_sender: AckActionSender,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        AcknowledgementListener {
            ack_key,
            ack_receiver,
            action_sender,
            stats_tx,
+            task_client,
        }
    }

@@ -64,9 +68,14 @@ impl AcknowledgementListener {
        trace!("Received {} from the mix network", frag_id);
        self.stats_tx
            .report(PacketStatisticsEvent::RealAckReceived(ack_content.len()).into());
-        self.action_sender
+        if let Err(err) = self
+            .action_sender
            .unbounded_send(Action::new_remove(frag_id))
-            .unwrap();
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send remove action to action controller: {err}");
+            }
+        }
    }

    async fn handle_ack_receiver_item(&mut self, item: Vec<Vec<u8>>) {
@@ -76,10 +85,10 @@ impl AcknowledgementListener {
        }
    }

-    pub(super) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(super) async fn run(&mut self) {
        debug!("Started AcknowledgementListener with graceful shutdown support");

-        while !shutdown.is_shutdown() {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                acks = self.ack_receiver.next() => match acks {
                    Some(acks) => self.handle_ack_receiver_item(acks).await,
@@ -88,12 +97,12 @@ impl AcknowledgementListener {
                        break;
                    }
                },
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv() => {
                    log::trace!("AcknowledgementListener: Received shutdown");
                }
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv_timeout().await;
        log::debug!("AcknowledgementListener: Exiting");
    }
 }
@@ -9,6 +9,7 @@ use log::*;
 use nym_nonexhaustive_delayqueue::{Expired, NonExhaustiveDelayQueue, QueueKey};
 use nym_sphinx::chunking::fragment::FragmentIdentifier;
 use nym_sphinx::Delay as SphinxDelay;
+use nym_task::TaskClient;
 use std::collections::HashMap;
 use std::sync::Arc;
 use std::time::Duration;
@@ -101,6 +102,8 @@ pub(super) struct ActionController {

    /// Channel for notifying `RetransmissionRequestListener` about expired acknowledgements.
    retransmission_sender: RetransmissionRequestSender,
+
+    task_client: TaskClient,
 }

 impl ActionController {
@@ -108,6 +111,7 @@ impl ActionController {
        config: Config,
        retransmission_sender: RetransmissionRequestSender,
        incoming_actions: AckActionReceiver,
+        task_client: TaskClient,
    ) -> Self {
        ActionController {
            config,
@@ -115,6 +119,7 @@ impl ActionController {
            pending_acks_timers: NonExhaustiveDelayQueue::new(),
            incoming_actions,
            retransmission_sender,
+            task_client,
        }
    }

@@ -216,11 +221,7 @@ impl ActionController {
    }

    // note: when the entry expires it's automatically removed from pending_acks_timers
-    fn handle_expired_ack_timer(
-        &mut self,
-        expired_ack: Expired<FragmentIdentifier>,
-        task_client: &mut nym_task::TaskClient,
-    ) {
+    fn handle_expired_ack_timer(&mut self, expired_ack: Expired<FragmentIdentifier>) {
        // I'm honestly not sure how to handle it, because getting it means other things in our
        // system are already misbehaving. If we ever see this panic, then I guess we should worry
        // about it. Perhaps just reschedule it at later point?
@@ -238,15 +239,13 @@ impl ActionController {
            // downgrading an arc and then upgrading vs cloning is difference of 30ns vs 15ns
            // so it's literally a NO difference while it might prevent us from unnecessarily
            // resending data (in maybe 1 in 1 million cases, but it's something)
-            if self
+            if let Err(err) = self
                .retransmission_sender
                .unbounded_send(Arc::downgrade(pending_ack_data))
-                .is_err()
            {
-                assert!(
-                    task_client.is_shutdown_poll(),
-                    "Failed to send pending ack for retransmission"
-                );
+                if !self.task_client.is_shutdown_poll() {
+                    log::error!("Failed to send pending ack for retransmission: {err}");
+                }
            }
        } else {
            // this shouldn't cause any issues but shouldn't have happened to begin with!
@@ -265,10 +264,10 @@ impl ActionController {
        }
    }

-    pub(super) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(super) async fn run(&mut self) {
        debug!("Started ActionController with graceful shutdown support");

-        loop {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                action = self.incoming_actions.next() => match action {
                    Some(action) => self.process_action(action),
@@ -280,19 +279,19 @@ impl ActionController {
                    }
                },
                expired_ack = self.pending_acks_timers.next() => match expired_ack {
-                    Some(expired_ack) => self.handle_expired_ack_timer(expired_ack, &mut shutdown),
+                    Some(expired_ack) => self.handle_expired_ack_timer(expired_ack),
                    None => {
                        log::trace!("ActionController: Stopping since ack channel closed");
                        break;
                    }
                },
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv() => {
                    log::trace!("ActionController: Received shutdown");
                    break;
                }
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv_timeout().await;
        log::debug!("ActionController: Exiting");
    }
 }
@@ -11,6 +11,7 @@ use nym_sphinx::anonymous_replies::requests::AnonymousSenderTag;
 use nym_sphinx::forwarding::packet::MixPacket;
 use nym_sphinx::params::PacketType;
 use nym_task::connections::TransmissionLane;
+use nym_task::TaskClient;
 use rand::{CryptoRng, Rng};

 /// Module responsible for dealing with the received messages: splitting them, creating acknowledgements,
@@ -23,6 +24,7 @@ where
    input_receiver: InputMessageReceiver,
    message_handler: MessageHandler<R>,
    reply_controller_sender: ReplyControllerSender,
+    task_client: TaskClient,
 }

 impl<R> InputMessageListener<R>
@@ -36,11 +38,13 @@ where
        input_receiver: InputMessageReceiver,
        message_handler: MessageHandler<R>,
        reply_controller_sender: ReplyControllerSender,
+        task_client: TaskClient,
    ) -> Self {
        InputMessageListener {
            input_receiver,
            message_handler,
            reply_controller_sender,
+            task_client,
        }
    }

@@ -63,8 +67,14 @@ where
        lane: TransmissionLane,
    ) {
        // offload reply handling to the dedicated task
-        self.reply_controller_sender
+        if let Err(err) = self
+            .reply_controller_sender
            .send_reply(recipient_tag, data, lane)
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("failed to send a reply - {err}");
+            }
+        }
    }

    async fn handle_plain_message(
@@ -164,10 +174,10 @@ where
        };
    }

-    pub(super) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(super) async fn run(&mut self) {
        debug!("Started InputMessageListener with graceful shutdown support");

-        while !shutdown.is_shutdown() {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                input_msg = self.input_receiver.recv() => match input_msg {
                    Some(input_msg) => {
@@ -178,12 +188,12 @@ where
                        break;
                    }
                },
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv() => {
                    log::trace!("InputMessageListener: Received shutdown");
                }
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv_timeout().await;
        log::debug!("InputMessageListener: Exiting");
    }
 }
@@ -24,6 +24,7 @@ use nym_sphinx::{
    Delay as SphinxDelay,
 };
 use nym_statistics_common::clients::ClientStatsSender;
+use nym_task::TaskClient;
 use rand::{CryptoRng, Rng};
 use std::{
    sync::{Arc, Weak},
@@ -66,7 +67,7 @@ pub(crate) enum PacketDestination {

 /// Structure representing a data `Fragment` that is on-route to the specified `Recipient`
 #[derive(Debug)]
-pub(crate) struct PendingAcknowledgement {
+pub struct PendingAcknowledgement {
    message_chunk: Fragment,
    delay: SphinxDelay,
    destination: PacketDestination,
@@ -216,6 +217,7 @@ where
        message_handler: MessageHandler<R>,
        reply_controller_sender: ReplyControllerSender,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        let (retransmission_tx, retransmission_rx) = mpsc::unbounded();

@@ -225,6 +227,7 @@ where
            action_config,
            retransmission_tx,
            connectors.ack_action_receiver,
+            task_client.fork("action_controller"),
        );

        // will listen for any acks coming from the network
@@ -233,6 +236,7 @@ where
            connectors.ack_receiver,
            connectors.ack_action_sender.clone(),
            stats_tx,
+            task_client.fork("acknowledgement_listener"),
        );

        // will listen for any new messages from the client
@@ -240,6 +244,7 @@ where
            connectors.input_receiver,
            message_handler.clone(),
            reply_controller_sender.clone(),
+            task_client.fork("input_message_listener"),
        );

        // will listen for any ack timeouts and trigger retransmission
@@ -249,12 +254,16 @@ where
            message_handler,
            retransmission_rx,
            reply_controller_sender,
+            task_client.fork("retransmission_request_listener"),
        );

        // will listen for events indicating the packet was sent through the network so that
        // the retransmission timer should be started.
-        let sent_notification_listener =
-            SentNotificationListener::new(connectors.sent_notifier, connectors.ack_action_sender);
+        let sent_notification_listener = SentNotificationListener::new(
+            connectors.sent_notifier,
+            connectors.ack_action_sender,
+            task_client.with_suffix("sent_notification_listener"),
+        );

        AcknowledgementController {
            acknowledgement_listener,
@@ -265,53 +274,35 @@ where
        }
    }

-    pub(super) fn start_with_shutdown(
-        self,
-        shutdown: nym_task::TaskClient,
-        packet_type: PacketType,
-    ) {
+    pub(super) fn start(self, packet_type: PacketType) {
        let mut acknowledgement_listener = self.acknowledgement_listener;
        let mut input_message_listener = self.input_message_listener;
        let mut retransmission_request_listener = self.retransmission_request_listener;
        let mut sent_notification_listener = self.sent_notification_listener;
        let mut action_controller = self.action_controller;

-        let shutdown_handle = shutdown.fork("acknowledgement_listener");
        spawn_future(async move {
-            acknowledgement_listener
-                .run_with_shutdown(shutdown_handle)
-                .await;
+            acknowledgement_listener.run().await;
            debug!("The acknowledgement listener has finished execution!");
        });

-        let shutdown_handle = shutdown.fork("input_message_listener");
        spawn_future(async move {
-            input_message_listener
-                .run_with_shutdown(shutdown_handle)
-                .await;
+            input_message_listener.run().await;
            debug!("The input listener has finished execution!");
        });

-        let shutdown_handle = shutdown.fork("retransmission_request_listener");
        spawn_future(async move {
-            retransmission_request_listener
-                .run_with_shutdown(shutdown_handle, packet_type)
-                .await;
+            retransmission_request_listener.run(packet_type).await;
            debug!("The retransmission request listener has finished execution!");
        });

-        let shutdown_handle = shutdown.fork("sent_notification_listener");
        spawn_future(async move {
-            sent_notification_listener
-                .run_with_shutdown(shutdown_handle)
-                .await;
+            sent_notification_listener.run().await;
            debug!("The sent notification listener has finished execution!");
        });

        spawn_future(async move {
-            action_controller
-                .run_with_shutdown(shutdown.with_suffix("action_controller"))
-                .await;
+            action_controller.run().await;
            debug!("The controller has finished execution!");
        });
    }
@@ -14,7 +14,7 @@ use log::*;
 use nym_sphinx::chunking::fragment::Fragment;
 use nym_sphinx::preparer::PreparedFragment;
 use nym_sphinx::{addressing::clients::Recipient, params::PacketType};
-use nym_task::connections::TransmissionLane;
+use nym_task::{connections::TransmissionLane, TaskClient};
 use rand::{CryptoRng, Rng};
 use std::sync::{Arc, Weak};

@@ -25,6 +25,7 @@ pub(super) struct RetransmissionRequestListener<R> {
    message_handler: MessageHandler<R>,
    request_receiver: RetransmissionRequestReceiver,
    reply_controller_sender: ReplyControllerSender,
+    task_client: TaskClient,
 }

 impl<R> RetransmissionRequestListener<R>
@@ -37,6 +38,7 @@ where
        message_handler: MessageHandler<R>,
        request_receiver: RetransmissionRequestReceiver,
        reply_controller_sender: ReplyControllerSender,
+        task_client: TaskClient,
    ) -> Self {
        RetransmissionRequestListener {
            maximum_retransmissions,
@@ -44,6 +46,7 @@ where
            message_handler,
            request_receiver,
            reply_controller_sender,
+            task_client,
        }
    }

@@ -79,9 +82,12 @@ where
        if let Some(limit) = self.maximum_retransmissions {
            if timed_out_ack.retransmissions >= limit {
                warn!("reached maximum number of allowed retransmissions for the packet");
-                self.action_sender
+                if let Err(err) = self
+                    .action_sender
                    .unbounded_send(Action::new_remove(frag_id))
-                    .unwrap();
+                {
+                    error!("Failed to send remove action to the controller: {err}");
+                }
                return;
            }
        }
@@ -93,11 +99,16 @@ where
            } => {
                // if this is retransmission for reply, offload it to the dedicated task
                // that deals with all the surbs
-                return self.reply_controller_sender.send_retransmission_data(
+                if let Err(err) = self.reply_controller_sender.send_retransmission_data(
                    *recipient_tag,
                    weak_timed_out_ack,
                    *extra_surb_request,
-                );
+                ) {
+                    if !self.task_client.is_shutdown_poll() {
+                        error!("Failed to send retransmission data to the reply controller: {err}");
+                    }
+                }
+                return;
            }
            PacketDestination::KnownRecipient(recipient) => {
                self.prepare_normal_retransmission_chunk(
@@ -114,9 +125,12 @@ where
            Err(err) => {
                warn!("Could not retransmit the packet - {err}");
                // we NEED to start timer here otherwise we will have this guy permanently stuck in memory
-                self.action_sender
+                if let Err(err) = self
+                    .action_sender
                    .unbounded_send(Action::new_start_timer(frag_id))
-                    .unwrap();
+                {
+                    error!("Failed to send start timer action to the controller: {err}");
+                }
                return;
            }
        };
@@ -141,9 +155,14 @@ where
        // is sent to the `OutQueueControl` and has gone through its internal queue
        // with the additional poisson delay.
        // And since Actions are executed in order `UpdateTimer` will HAVE TO be executed before `StartTimer`
-        self.action_sender
+        if let Err(err) = self
+            .action_sender
            .unbounded_send(Action::new_update_pending_ack(frag_id, new_delay))
-            .unwrap();
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send update pending ack action to the controller: {err}");
+            }
+        }

        // send to `OutQueueControl` to eventually send to the mix network
        self.message_handler
@@ -157,14 +176,10 @@ where
            .await
    }

-    pub(super) async fn run_with_shutdown(
-        &mut self,
-        mut shutdown: nym_task::TaskClient,
-        packet_type: PacketType,
-    ) {
+    pub(super) async fn run(&mut self, packet_type: PacketType) {
        debug!("Started RetransmissionRequestListener with graceful shutdown support");

-        while !shutdown.is_shutdown() {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                timed_out_ack = self.request_receiver.next() => match timed_out_ack {
                    Some(timed_out_ack) => self.on_retransmission_request(timed_out_ack, packet_type).await,
@@ -173,12 +188,12 @@ where
                        break;
                    }
                },
-                _ = shutdown.recv() => {
+                _ = self.task_client.recv() => {
                    log::trace!("RetransmissionRequestListener: Received shutdown");
                }
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv_timeout().await;
        log::debug!("RetransmissionRequestListener: Exiting");
    }
 }
@@ -6,6 +6,7 @@ use super::SentPacketNotificationReceiver;
 use futures::StreamExt;
 use log::*;
 use nym_sphinx::chunking::fragment::{FragmentIdentifier, COVER_FRAG_ID};
+use nym_task::TaskClient;

 /// Module responsible for starting up retransmission timers.
 /// It is required because when we send our packet to the `real traffic stream` controlled
@@ -14,16 +15,19 @@ use nym_sphinx::chunking::fragment::{FragmentIdentifier, COVER_FRAG_ID};
 pub(super) struct SentNotificationListener {
    sent_notifier: SentPacketNotificationReceiver,
    action_sender: AckActionSender,
+    task_client: TaskClient,
 }

 impl SentNotificationListener {
    pub(super) fn new(
        sent_notifier: SentPacketNotificationReceiver,
        action_sender: AckActionSender,
+        task_client: TaskClient,
    ) -> Self {
        SentNotificationListener {
            sent_notifier,
            action_sender,
+            task_client,
        }
    }

@@ -32,15 +36,20 @@ impl SentNotificationListener {
            trace!("sent off a cover message - no need to start retransmission timer!");
            return;
        }
-        self.action_sender
+        if let Err(err) = self
+            .action_sender
            .unbounded_send(Action::new_start_timer(frag_id))
-            .unwrap();
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send start timer action to action controller: {err}");
+            }
+        }
    }

-    pub(super) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(super) async fn run(&mut self) {
        debug!("Started SentNotificationListener with graceful shutdown support");

-        loop {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                frag_id = self.sent_notifier.next() => match frag_id {
                    Some(frag_id) => {
@@ -51,13 +60,13 @@ impl SentNotificationListener {
                        break;
                    }
                },
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv() => {
                    log::trace!("SentNotificationListener: Received shutdown");
                    break;
                }
            }
        }
-        assert!(shutdown.is_shutdown_poll());
+        assert!(self.task_client.is_shutdown_poll());
        log::debug!("SentNotificationListener: Exiting");
    }
 }
@@ -19,6 +19,7 @@ use nym_sphinx::params::{PacketSize, PacketType};
 use nym_sphinx::preparer::{MessagePreparer, PreparedFragment};
 use nym_sphinx::Delay;
 use nym_task::connections::TransmissionLane;
+use nym_task::TaskClient;
 use nym_topology::{NymRouteProvider, NymTopologyError};
 use rand::{CryptoRng, Rng};
 use std::collections::HashMap;
@@ -149,12 +150,14 @@ pub(crate) struct MessageHandler<R> {
    topology_access: TopologyAccessor,
    reply_key_storage: SentReplyKeys,
    tag_storage: UsedSenderTags,
+    task_client: TaskClient,
 }

 impl<R> MessageHandler<R>
 where
    R: CryptoRng + Rng,
 {
+    #[allow(clippy::too_many_arguments)]
    pub(crate) fn new(
        config: Config,
        rng: R,
@@ -163,6 +166,7 @@ where
        topology_access: TopologyAccessor,
        reply_key_storage: SentReplyKeys,
        tag_storage: UsedSenderTags,
+        task_client: TaskClient,
    ) -> Self
    where
        R: Copy,
@@ -183,6 +187,7 @@ where
            topology_access,
            reply_key_storage,
            tag_storage,
+            task_client,
        }
    }

@@ -609,15 +614,25 @@ where
    }

    pub(crate) fn update_ack_delay(&self, id: FragmentIdentifier, new_delay: Delay) {
-        self.action_sender
+        if let Err(err) = self
+            .action_sender
            .unbounded_send(Action::UpdatePendingAck(id, new_delay))
-            .expect("action control task has died")
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send update action to the controller: {err}");
+            }
+        }
    }

    pub(crate) fn insert_pending_acks(&self, pending_acks: Vec<PendingAcknowledgement>) {
-        self.action_sender
+        if let Err(err) = self
+            .action_sender
            .unbounded_send(Action::new_insert(pending_acks))
-            .expect("action control task has died")
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to send insert action to the controller: {err}");
+            }
+        }
    }

    // tells real message sender (with the poisson timer) to send this to the mix network
@@ -626,9 +641,14 @@ where
        messages: Vec<RealMessage>,
        transmission_lane: TransmissionLane,
    ) {
-        self.real_message_sender
+        if let Err(err) = self
+            .real_message_sender
            .send((messages, transmission_lane))
            .await
-            .expect("real message receiver task (OutQueueControl) has died");
+        {
+            if !self.task_client.is_shutdown_poll() {
+                error!("Failed to forward messages to the real message sender: {err}");
+            }
+        }
    }
 }
@@ -31,6 +31,7 @@ use nym_sphinx::addressing::clients::Recipient;
 use nym_sphinx::params::PacketType;
 use nym_statistics_common::clients::ClientStatsSender;
 use nym_task::connections::{ConnectionCommandReceiver, LaneQueueLengths};
+use nym_task::TaskClient;
 use rand::{rngs::OsRng, CryptoRng, Rng};
 use std::sync::Arc;

@@ -147,6 +148,7 @@ impl RealMessagesController<OsRng> {
        lane_queue_lengths: LaneQueueLengths,
        client_connection_rx: ConnectionCommandReceiver,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        let rng = OsRng;

@@ -177,6 +179,7 @@ impl RealMessagesController<OsRng> {
            topology_access.clone(),
            reply_storage.key_storage(),
            reply_storage.tags_storage(),
+            task_client.fork("message_handler"),
        );

        let ack_control = AcknowledgementController::new(
@@ -186,6 +189,7 @@ impl RealMessagesController<OsRng> {
            message_handler.clone(),
            reply_controller_sender,
            stats_tx.clone(),
+            task_client.fork("ack_control"),
        );

        let reply_control = ReplyController::new(
@@ -193,6 +197,7 @@ impl RealMessagesController<OsRng> {
            message_handler,
            reply_storage,
            reply_controller_receiver,
+            task_client.fork("reply_controller"),
        );

        let out_queue_control = OutQueueControl::new(
@@ -205,6 +210,7 @@ impl RealMessagesController<OsRng> {
            lane_queue_lengths,
            client_connection_rx,
            stats_tx,
+            task_client.with_suffix("out_queue_control"),
        );

        RealMessagesController {
@@ -214,22 +220,20 @@ impl RealMessagesController<OsRng> {
        }
    }

-    pub fn start_with_shutdown(self, shutdown: nym_task::TaskClient, packet_type: PacketType) {
+    pub fn start(self, packet_type: PacketType) {
        let mut out_queue_control = self.out_queue_control;
        let ack_control = self.ack_control;
        let mut reply_control = self.reply_control;

-        let shutdown_handle = shutdown.fork("out_queue_control");
        spawn_future(async move {
-            out_queue_control.run_with_shutdown(shutdown_handle).await;
+            out_queue_control.run().await;
            debug!("The out queue controller has finished execution!");
        });
-        let shutdown_handle = shutdown.fork("reply_control");
        spawn_future(async move {
-            reply_control.run_with_shutdown(shutdown_handle).await;
+            reply_control.run().await;
            debug!("The reply controller has finished execution!");
        });

-        ack_control.start_with_shutdown(shutdown.with_suffix("ack_control"), packet_type);
+        ack_control.start(packet_type);
    }
 }
@@ -22,6 +22,7 @@ use nym_statistics_common::clients::{packet_statistics::PacketStatisticsEvent, C
 use nym_task::connections::{
    ConnectionCommand, ConnectionCommandReceiver, ConnectionId, LaneQueueLengths, TransmissionLane,
 };
+use nym_task::TaskClient;
 use rand::{CryptoRng, Rng};
 use std::pin::Pin;
 use std::sync::Arc;
@@ -117,6 +118,8 @@ where

    /// Channel used for sending metrics events (specifically `PacketStatistics` events) to the metrics tracker.
    stats_tx: ClientStatsSender,
+
+    task_client: TaskClient,
 }

 #[derive(Debug)]
@@ -176,6 +179,7 @@ where
        lane_queue_lengths: LaneQueueLengths,
        client_connection_rx: ConnectionCommandReceiver,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        OutQueueControl {
            config,
@@ -190,6 +194,7 @@ where
            client_connection_rx,
            lane_queue_lengths,
            stats_tx,
+            task_client,
        }
    }

@@ -198,7 +203,9 @@ where
        // queues and client load rather than the required delay. So realistically we can treat
        // whatever is about to happen as negligible additional delay.
        trace!("{} is about to get sent to the mixnet", frag_id);
-        self.sent_notifier.unbounded_send(frag_id).unwrap();
+        if let Err(err) = self.sent_notifier.unbounded_send(frag_id) {
+            error!("Failed to notify about sent message: {err}");
+        }
    }

    fn loop_cover_message_size(&mut self) -> PacketSize {
@@ -271,7 +278,9 @@ where
        };

        if let Err(err) = self.mix_tx.send(vec![next_message]).await {
-            log::error!("Failed to send: {err}");
+            if !self.task_client.is_shutdown_poll() {
+                log::error!("Failed to send: {err}");
+            }
        } else {
            let event = if fragment_id.is_some() {
                PacketStatisticsEvent::RealPacketSent(packet_size)
@@ -504,7 +513,7 @@ where
    }

    #[cfg(not(target_arch = "wasm32"))]
-    fn log_status(&self, shutdown: &mut nym_task::TaskClient) {
+    fn log_status(&self, shutdown: &mut TaskClient) {
        use crate::error::ClientCoreStatusMessage;

        let packets = self.transmission_buffer.total_size();
@@ -535,17 +544,19 @@ where
        }
    }

-    pub(super) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(super) async fn run(&mut self) {
        debug!("Started OutQueueControl with graceful shutdown support");

+        let mut shutdown = self.task_client.fork("select");
+
        #[cfg(not(target_arch = "wasm32"))]
        {
            let mut status_timer = tokio::time::interval(Duration::from_secs(5));

-            loop {
+            while !shutdown.is_shutdown() {
                tokio::select! {
                    biased;
-                    _ = shutdown.recv_with_delay() => {
+                    _ = shutdown.recv() => {
                        log::trace!("OutQueueControl: Received shutdown");
                        break;
                    }
@@ -20,6 +20,7 @@ use nym_sphinx::message::{NymMessage, PlainMessage};
 use nym_sphinx::params::ReplySurbKeyDigestAlgorithm;
 use nym_sphinx::receiver::{MessageReceiver, MessageRecoveryError, ReconstructedMessage};
 use nym_statistics_common::clients::{packet_statistics::PacketStatisticsEvent, ClientStatsSender};
+use nym_task::TaskClient;
 use std::collections::HashSet;
 use std::sync::Arc;

@@ -152,6 +153,7 @@ struct ReceivedMessagesBuffer<R: MessageReceiver> {
    inner: Arc<Mutex<ReceivedMessagesBufferInner<R>>>,
    reply_key_storage: SentReplyKeys,
    reply_controller_sender: ReplyControllerSender,
+    task_client: TaskClient,
 }

 impl<R: MessageReceiver> ReceivedMessagesBuffer<R> {
@@ -160,6 +162,7 @@ impl<R: MessageReceiver> ReceivedMessagesBuffer<R> {
        reply_key_storage: SentReplyKeys,
        reply_controller_sender: ReplyControllerSender,
        stats_tx: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        ReceivedMessagesBuffer {
            inner: Arc::new(Mutex::new(ReceivedMessagesBufferInner {
@@ -172,6 +175,7 @@ impl<R: MessageReceiver> ReceivedMessagesBuffer<R> {
            })),
            reply_key_storage,
            reply_controller_sender,
+            task_client,
        }
    }

@@ -257,11 +261,15 @@ impl<R: MessageReceiver> ReceivedMessagesBuffer<R> {
                }
            };

-            self.reply_controller_sender.send_additional_surbs(
+            if let Err(err) = self.reply_controller_sender.send_additional_surbs(
                msg.sender_tag,
                reply_surbs,
                from_surb_request,
-            )
+            ) {
+                if !self.task_client.is_shutdown_poll() {
+                    error!("{err}");
+                }
+            }
        }
        reconstructed
    }
@@ -276,8 +284,14 @@ impl<R: MessageReceiver> ReceivedMessagesBuffer<R> {
                ReplyMessageContent::Data { message } => reconstructed.push(message.into()),
                ReplyMessageContent::SurbRequest { recipient, amount } => {
                    debug!("received request for {amount} additional reply SURBs from {recipient}");
-                    self.reply_controller_sender
-                        .send_additional_surbs_request(*recipient, amount);
+                    if let Err(err) = self
+                        .reply_controller_sender
+                        .send_additional_surbs_request(*recipient, amount)
+                    {
+                        if !self.task_client.is_shutdown_poll() {
+                            error!("{err}");
+                        }
+                    }
                }
            }
        }
@@ -399,16 +413,19 @@ pub enum ReceivedBufferMessage {
 struct RequestReceiver<R: MessageReceiver> {
    received_buffer: ReceivedMessagesBuffer<R>,
    query_receiver: ReceivedBufferRequestReceiver,
+    task_client: TaskClient,
 }

 impl<R: MessageReceiver> RequestReceiver<R> {
    fn new(
        received_buffer: ReceivedMessagesBuffer<R>,
        query_receiver: ReceivedBufferRequestReceiver,
+        task_client: TaskClient,
    ) -> Self {
        RequestReceiver {
            received_buffer,
            query_receiver,
+            task_client,
        }
    }

@@ -423,12 +440,12 @@ impl<R: MessageReceiver> RequestReceiver<R> {
        }
    }

-    async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    async fn run(&mut self) {
        debug!("Started RequestReceiver with graceful shutdown support");
-        while !shutdown.is_shutdown() {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                biased;
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv() => {
                    log::trace!("RequestReceiver: Received shutdown");
                }
                request = self.query_receiver.next() => {
@@ -441,7 +458,7 @@ impl<R: MessageReceiver> RequestReceiver<R> {
                },
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv().await;
        log::debug!("RequestReceiver: Exiting");
    }
 }
@@ -449,25 +466,25 @@ impl<R: MessageReceiver> RequestReceiver<R> {
 struct FragmentedMessageReceiver<R: MessageReceiver> {
    received_buffer: ReceivedMessagesBuffer<R>,
    mixnet_packet_receiver: MixnetMessageReceiver,
+    task_client: TaskClient,
 }

 impl<R: MessageReceiver> FragmentedMessageReceiver<R> {
    fn new(
        received_buffer: ReceivedMessagesBuffer<R>,
        mixnet_packet_receiver: MixnetMessageReceiver,
+        task_client: TaskClient,
    ) -> Self {
        FragmentedMessageReceiver {
            received_buffer,
            mixnet_packet_receiver,
+            task_client,
        }
    }

-    async fn run_with_shutdown(
-        &mut self,
-        mut shutdown: nym_task::TaskClient,
-    ) -> Result<(), MessageRecoveryError> {
+    async fn run(&mut self) -> Result<(), MessageRecoveryError> {
        debug!("Started FragmentedMessageReceiver with graceful shutdown support");
-        while !shutdown.is_shutdown() {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
                new_messages = self.mixnet_packet_receiver.next() => {
                    if let Some(new_messages) = new_messages {
@@ -477,12 +494,12 @@ impl<R: MessageReceiver> FragmentedMessageReceiver<R> {
                        break;
                    }
                },
-                _ = shutdown.recv_with_delay() => {
+                _ = self.task_client.recv_with_delay() => {
                    log::trace!("FragmentedMessageReceiver: Received shutdown");
                }
            }
        }
-        shutdown.recv_timeout().await;
+        self.task_client.recv_timeout().await;
        log::debug!("FragmentedMessageReceiver: Exiting");
        Ok(())
    }
@@ -501,41 +518,42 @@ impl<R: MessageReceiver + Clone + Send + 'static> ReceivedMessagesBufferControll
        reply_key_storage: SentReplyKeys,
        reply_controller_sender: ReplyControllerSender,
        metrics_reporter: ClientStatsSender,
+        task_client: TaskClient,
    ) -> Self {
        let received_buffer = ReceivedMessagesBuffer::new(
            local_encryption_keypair,
            reply_key_storage,
            reply_controller_sender,
            metrics_reporter,
+            task_client.fork("received_messages_buffer"),
        );

        ReceivedMessagesBufferController {
            fragmented_message_receiver: FragmentedMessageReceiver::new(
                received_buffer.clone(),
                mixnet_packet_receiver,
+                task_client.fork("fragmented_message_receiver"),
+            ),
+            request_receiver: RequestReceiver::new(
+                received_buffer,
+                query_receiver,
+                task_client.with_suffix("request_receiver"),
            ),
-            request_receiver: RequestReceiver::new(received_buffer, query_receiver),
        }
    }

-    pub fn start_with_shutdown(self, shutdown: nym_task::TaskClient) {
+    pub fn start(self) {
        let mut fragmented_message_receiver = self.fragmented_message_receiver;
        let mut request_receiver = self.request_receiver;

-        let shutdown_handle = shutdown.fork("fragmented_message_receiver");
        spawn_future(async move {
-            match fragmented_message_receiver
-                .run_with_shutdown(shutdown_handle)
-                .await
-            {
+            match fragmented_message_receiver.run().await {
                Ok(_) => {}
                Err(e) => error!("{e}"),
            }
        });
        spawn_future(async move {
-            request_receiver
-                .run_with_shutdown(shutdown.with_suffix("request_receiver"))
-                .await;
+            request_receiver.run().await;
        });
    }
 }
@@ -12,6 +12,7 @@ use nym_sphinx::anonymous_replies::requests::AnonymousSenderTag;
 use nym_sphinx::anonymous_replies::ReplySurb;
 use nym_sphinx::chunking::fragment::{Fragment, FragmentIdentifier};
 use nym_task::connections::{ConnectionId, TransmissionLane};
+use nym_task::TaskClient;
 use rand::{CryptoRng, Rng};
 use std::cmp::{max, min};
 use std::collections::btree_map::Entry;
@@ -68,6 +69,9 @@ pub struct ReplyController<R> {

    message_handler: MessageHandler<R>,
    full_reply_storage: CombinedReplyStorage,
+
+    // Listen for shutdown signals
+    task_client: TaskClient,
 }

 impl<R> ReplyController<R>
@@ -79,6 +83,7 @@ where
        message_handler: MessageHandler<R>,
        full_reply_storage: CombinedReplyStorage,
        request_receiver: ReplyControllerReceiver,
+        task_client: TaskClient,
    ) -> Self {
        ReplyController {
            config,
@@ -87,6 +92,7 @@ where
            pending_retransmissions: HashMap::new(),
            message_handler,
            full_reply_storage,
+            task_client,
        }
    }

@@ -846,9 +852,11 @@ where
    //     todo!()
    // }

-    pub(crate) async fn run_with_shutdown(&mut self, mut shutdown: nym_task::TaskClient) {
+    pub(crate) async fn run(&mut self) {
        debug!("Started ReplyController with graceful shutdown support");

+        let mut shutdown = self.task_client.fork("select");
+
        let polling_rate = Duration::from_secs(5);
        let mut stale_inspection = new_interval_stream(polling_rate);

@@ -860,7 +868,7 @@ where
        while !shutdown.is_shutdown() {
            tokio::select! {
                biased;
-                _ = shutdown.recv_with_delay() => {
+                _ = shutdown.recv() => {
                    log::trace!("ReplyController: Received shutdown");
                },
                req = self.request_receiver.next() => match req {
@@ -15,6 +15,27 @@ pub(crate) fn new_control_channels() -> (ReplyControllerSender, ReplyControllerR
    (tx.into(), rx)
 }

+#[derive(Debug, thiserror::Error)]
+pub enum ReplyControllerSenderError {
+    #[error("failed to send retransmission data to reply controller")]
+    SendRetransmissionData(#[source] mpsc::TrySendError<ReplyControllerMessage>),
+
+    #[error("failed to send reply to reply controller")]
+    SendReply(#[source] mpsc::TrySendError<ReplyControllerMessage>),
+
+    #[error("failed to send additional surbs to reply controller")]
+    AdditionalSurbs(#[source] mpsc::TrySendError<ReplyControllerMessage>),
+
+    #[error("failed to send additional surbs request to reply controller")]
+    AdditionalSurbsRequest(#[source] mpsc::TrySendError<ReplyControllerMessage>),
+
+    #[error("failed to request lane queue length from reply controller")]
+    LaneQueueLength(#[source] mpsc::TrySendError<ReplyControllerMessage>),
+
+    #[error("response channel was dropped before we could receive the response")]
+    ResponseChannelDropped(#[source] oneshot::Canceled),
+}
+
 #[derive(Debug, Clone)]
 pub struct ReplyControllerSender(mpsc::UnboundedSender<ReplyControllerMessage>);

@@ -30,14 +51,14 @@ impl ReplyControllerSender {
        recipient: AnonymousSenderTag,
        timed_out_ack: Weak<PendingAcknowledgement>,
        extra_surb_request: bool,
-    ) {
+    ) -> Result<(), ReplyControllerSenderError> {
        self.0
            .unbounded_send(ReplyControllerMessage::RetransmitReply {
                recipient,
                timed_out_ack,
                extra_surb_request,
            })
-            .expect("ReplyControllerReceiver has died!")
+            .map_err(ReplyControllerSenderError::SendRetransmissionData)
    }

    pub(crate) fn send_reply(
@@ -45,14 +66,14 @@ impl ReplyControllerSender {
        recipient: AnonymousSenderTag,
        message: Vec<u8>,
        lane: TransmissionLane,
-    ) {
+    ) -> Result<(), ReplyControllerSenderError> {
        self.0
            .unbounded_send(ReplyControllerMessage::SendReply {
                recipient,
                message,
                lane,
            })
-            .expect("ReplyControllerReceiver has died!")
+            .map_err(ReplyControllerSenderError::SendReply)
    }

    pub(crate) fn send_additional_surbs(
@@ -60,42 +81,47 @@ impl ReplyControllerSender {
        sender_tag: AnonymousSenderTag,
        reply_surbs: Vec<ReplySurb>,
        from_surb_request: bool,
-    ) {
+    ) -> Result<(), ReplyControllerSenderError> {
        self.0
            .unbounded_send(ReplyControllerMessage::AdditionalSurbs {
                sender_tag,
                reply_surbs,
                from_surb_request,
            })
-            .expect("ReplyControllerReceiver has died!")
+            .map_err(ReplyControllerSenderError::AdditionalSurbs)
    }

-    pub(crate) fn send_additional_surbs_request(&self, recipient: Recipient, amount: u32) {
+    pub(crate) fn send_additional_surbs_request(
+        &self,
+        recipient: Recipient,
+        amount: u32,
+    ) -> Result<(), ReplyControllerSenderError> {
        self.0
            .unbounded_send(ReplyControllerMessage::AdditionalSurbsRequest {
                recipient: Box::new(recipient),
                amount,
            })
-            .expect("ReplyControllerReceiver has died!")
+            .map_err(ReplyControllerSenderError::AdditionalSurbsRequest)
    }

-    pub async fn get_lane_queue_length(&self, connection_id: ConnectionId) -> usize {
+    pub async fn get_lane_queue_length(
+        &self,
+        connection_id: ConnectionId,
+    ) -> Result<usize, ReplyControllerSenderError> {
        let (response_tx, response_rx) = oneshot::channel();
-        self.0
+        if let Err(err) = self
+            .0
            .unbounded_send(ReplyControllerMessage::LaneQueueLength {
                connection_id,
                response_channel: response_tx,
            })
-            .expect("ReplyControllerReceiver has died!");
-
-        match response_rx.await {
-            Ok(length) => length,
-            Err(_) => {
-                error!("The reply controller has dropped our response channel!");
-                // TODO: should we panic here instead? this message implies something weird and unrecoverable has happened
-                0
-            }
+        {
+            return Err(ReplyControllerSenderError::LaneQueueLength(err));
        }
+
+        response_rx
+            .await
+            .map_err(ReplyControllerSenderError::ResponseChannelDropped)
    }
 }

@@ -110,7 +136,10 @@ impl ReplyQueueLengths {
        }
    }

-    pub async fn get_lane_queue_length(&self, connection_id: ConnectionId) -> usize {
+    pub async fn get_lane_queue_length(
+        &self,
+        connection_id: ConnectionId,
+    ) -> Result<usize, ReplyControllerSenderError> {
        self.reply_controller_sender
            .get_lane_queue_length(connection_id)
            .await
@@ -120,7 +149,7 @@ impl ReplyQueueLengths {
 pub(crate) type ReplyControllerReceiver = mpsc::UnboundedReceiver<ReplyControllerMessage>;

 #[derive(Debug)]
-pub(crate) enum ReplyControllerMessage {
+pub enum ReplyControllerMessage {
    RetransmitReply {
        recipient: AnonymousSenderTag,
        timed_out_ack: Weak<PendingAcknowledgement>,
@@ -22,7 +22,7 @@ use nym_sphinx::addressing::Recipient;
 use nym_statistics_common::clients::{
    ClientStatsController, ClientStatsReceiver, ClientStatsSender,
 };
-use nym_task::connections::TransmissionLane;
+use nym_task::{connections::TransmissionLane, TaskClient};
 use std::time::Duration;

 use crate::{
@@ -51,6 +51,9 @@ pub(crate) struct StatisticsControl {

    /// Config for stats reporting (enabled, address, interval)
    reporting_config: StatsReporting,
+
+    /// Task client for listening for shutdown
+    task_client: TaskClient,
 }

 impl StatisticsControl {
@@ -59,19 +62,24 @@ impl StatisticsControl {
        client_type: String,
        client_stats_id: String,
        report_tx: InputMessageSender,
+        task_client: TaskClient,
    ) -> (Self, ClientStatsSender) {
        let (stats_tx, stats_rx) = tokio::sync::mpsc::unbounded_channel();

        let stats = ClientStatsController::new(client_stats_id, client_type);

+        let mut task_client_stats_sender = task_client.fork("stats_sender");
+        task_client_stats_sender.disarm();
+
        (
            StatisticsControl {
                stats,
                stats_rx,
                report_tx,
                reporting_config,
+                task_client,
            },
-            ClientStatsSender::new(Some(stats_tx)),
+            ClientStatsSender::new(Some(stats_tx), task_client_stats_sender),
        )
    }

@@ -91,7 +99,7 @@ impl StatisticsControl {
        }
    }

-    async fn run_with_shutdown(&mut self, mut task_client: nym_task::TaskClient) {
+    async fn run(&mut self) {
        log::debug!("Started StatisticsControl with graceful shutdown support");

        #[cfg(not(target_arch = "wasm32"))]
@@ -121,8 +129,13 @@ impl StatisticsControl {
        let mut snapshot_interval =
            gloo_timers::future::IntervalStream::new(SNAPSHOT_INTERVAL.as_millis() as u32);

-        loop {
+        while !self.task_client.is_shutdown() {
            tokio::select! {
+                biased;
+                _ = self.task_client.recv() => {
+                    log::trace!("StatisticsControl: Received shutdown");
+                    break;
+                },
                stats_event = self.stats_rx.recv() => match stats_event {
                        Some(stats_event) => self.stats.handle_event(stats_event),
                        None => {
@@ -144,34 +157,34 @@ impl StatisticsControl {
                }

                _ = local_report_interval.next() => {
-                    self.stats.local_report(&mut task_client);
+                    self.stats.local_report(&mut self.task_client);
                }
-                _ = task_client.recv_with_delay() => {
-                    log::trace!("StatisticsControl: Received shutdown");
-                    break;
-                },
            }
        }
-        task_client.recv_timeout().await;
        log::debug!("StatisticsControl: Exiting");
    }

-    pub(crate) fn start_with_shutdown(mut self, task_client: nym_task::TaskClient) {
+    pub(crate) fn start(mut self) {
        spawn_future(async move {
-            self.run_with_shutdown(task_client).await;
+            self.run().await;
        })
    }

-    pub(crate) fn create_and_start_with_shutdown(
+    pub(crate) fn create_and_start(
        reporting_config: StatsReporting,
        client_type: String,
        client_stats_id: String,
        report_tx: InputMessageSender,
-        task_client: nym_task::TaskClient,
+        task_client: TaskClient,
    ) -> ClientStatsSender {
-        let (controller, sender) =
-            Self::create(reporting_config, client_type, client_stats_id, report_tx);
-        controller.start_with_shutdown(task_client);
+        let (controller, sender) = Self::create(
+            reporting_config,
+            client_type,
+            client_stats_id,
+            report_tx,
+            task_client,
+        );
+        controller.start();
        sender
    }
 }
@@ -6,6 +6,7 @@ pub(crate) use accessor::{TopologyAccessor, TopologyReadPermit};
 use futures::StreamExt;
 use log::*;
 use nym_sphinx::addressing::nodes::NodeIdentity;
+use nym_task::TaskClient;
 use nym_topology::NymTopologyError;
 use std::time::Duration;

@@ -43,6 +44,8 @@ pub struct TopologyRefresher {

    refresh_rate: Duration,
    consecutive_failure_count: usize,
+
+    task_client: TaskClient,
 }

 impl TopologyRefresher {
@@ -50,12 +53,14 @@ impl TopologyRefresher {
        cfg: TopologyRefresherConfig,
        topology_accessor: TopologyAccessor,
        topology_provider: Box<dyn TopologyProvider + Send + Sync>,
+        task_client: TaskClient,
    ) -> Self {
        TopologyRefresher {
            topology_provider,
            topology_accessor,
            refresh_rate: cfg.refresh_rate,
            consecutive_failure_count: 0,
+            task_client,
        }
    }

@@ -142,7 +147,7 @@ impl TopologyRefresher {
        }
    }

-    pub fn start_with_shutdown(mut self, mut shutdown: nym_task::TaskClient) {
+    pub fn start(mut self) {
        spawn_future(async move {
            debug!("Started TopologyRefresher with graceful shutdown support");

@@ -155,17 +160,17 @@ impl TopologyRefresher {
            let mut interval =
                gloo_timers::future::IntervalStream::new(self.refresh_rate.as_millis() as u32);

-            while !shutdown.is_shutdown() {
+            while !self.task_client.is_shutdown() {
                tokio::select! {
                    _ = interval.next() => {
                        self.try_refresh().await;
                    },
-                    _ = shutdown.recv() => {
+                    _ = self.task_client.recv() => {
                        log::trace!("TopologyRefresher: Received shutdown");
                    },
                }
            }
-            shutdown.recv_timeout().await;
+            self.task_client.recv_timeout().await;
            log::debug!("TopologyRefresher: Exiting");
        })
    }
@@ -36,6 +36,13 @@ pub enum ClientCoreError {
    #[error("no gateway with id: {0}")]
    NoGatewayWithId(String),

+    #[error("Invalid URL: {0}")]
+    InvalidUrl(String),
+
+    #[cfg(not(target_arch = "wasm32"))]
+    #[error("resolution failed: {0}")]
+    ResolutionFailed(#[from] nym_http_api_client::HickoryDnsError),
+
    #[error("no gateways on network")]
    NoGatewaysOnNetwork,

@@ -96,6 +103,9 @@ pub enum ClientCoreError {
    #[error("timed out while trying to establish gateway connection")]
    GatewayConnectionTimeout,

+    #[error("failed to forward mix messages to gateway")]
+    GatewayFailedToForwardMessages,
+
    #[error("no ping measurements for the gateway ({identity}) performed")]
    NoGatewayMeasurements { identity: String },

@@ -212,6 +222,9 @@ pub enum ClientCoreError {
        "fresh registration with gateway {gateway_id} somehow requires an additional key upgrade!"
    )]
    UnexpectedKeyUpgrade { gateway_id: String },
+
+    #[error("failed to derive keys from master key")]
+    HkdfDerivationError {},
 }

 /// Set of messages that the client can send to listeners via the task manager
@@ -15,6 +15,9 @@ use std::{sync::Arc, time::Duration};
 use tungstenite::Message;
 use url::Url;

+#[cfg(not(target_arch = "wasm32"))]
+use crate::init::websockets::connect_async;
+
 use nym_topology::NodeId;
 #[cfg(not(target_arch = "wasm32"))]
 use tokio::net::TcpStream;
@@ -23,8 +26,6 @@ use tokio::time::sleep;
 #[cfg(not(target_arch = "wasm32"))]
 use tokio::time::Instant;
 #[cfg(not(target_arch = "wasm32"))]
-use tokio_tungstenite::connect_async;
-#[cfg(not(target_arch = "wasm32"))]
 use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};
 #[cfg(target_arch = "wasm32")]
 use wasm_utils::websocket::JSWebsocket;
@@ -91,6 +92,7 @@ pub async fn gateways_for_init<R: Rng>(
    nym_apis: &[Url],
    user_agent: Option<UserAgent>,
    minimum_performance: u8,
+    ignore_epoch_roles: bool,
 ) -> Result<Vec<RoutingNode>, ClientCoreError> {
    let nym_api = nym_apis
        .choose(rng)
@@ -112,7 +114,7 @@ pub async fn gateways_for_init<R: Rng>(
    // (we don't want instability)
    let valid_gateways = gateways
        .iter()
-        .filter(|g| !g.supported_roles.mixnode)
+        .filter(|g| ignore_epoch_roles || !g.supported_roles.mixnode)
        .filter(|g| g.performance.round_to_integer() >= minimum_performance)
        .filter_map(|gateway| gateway.try_into().ok())
        .collect::<Vec<_>>();
@@ -131,7 +133,7 @@ pub async fn gateways_for_init<R: Rng>(
 async fn connect(endpoint: &str) -> Result<WsConn, ClientCoreError> {
    match tokio::time::timeout(CONN_TIMEOUT, connect_async(endpoint)).await {
        Err(_elapsed) => Err(ClientCoreError::GatewayConnectionTimeout),
-        Ok(Err(conn_failure)) => Err(conn_failure.into()),
+        Ok(Err(conn_failure)) => Err(conn_failure),
        Ok(Ok((stream, _))) => Ok(stream),
    }
 }
@@ -26,6 +26,8 @@ use serde::Serialize;

 pub mod helpers;
 pub mod types;
+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) mod websockets;

 // helpers for error wrapping

@@ -0,0 +1,44 @@
+use crate::error::ClientCoreError;
+
+use nym_http_api_client::HickoryDnsResolver;
+use tokio::net::TcpStream;
+use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};
+use tungstenite::handshake::client::Response;
+use url::{Host, Url};
+
+use std::net::SocketAddr;
+
+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) async fn connect_async(
+    endpoint: &str,
+) -> Result<(WebSocketStream<MaybeTlsStream<TcpStream>>, Response), ClientCoreError> {
+    let resolver = HickoryDnsResolver::default();
+    let uri = Url::parse(endpoint).map_err(|_| ClientCoreError::InvalidUrl(endpoint.to_owned()))?;
+    let port: u16 = uri.port_or_known_default().unwrap_or(443);
+
+    let host = uri
+        .host()
+        .ok_or(ClientCoreError::InvalidUrl(endpoint.to_owned()))?;
+
+    // Get address for tcp connection, if a domain is provided use our preferred resolver rather than
+    // the default std resolve
+    let sock_addrs: Vec<SocketAddr> = match host {
+        Host::Ipv4(addr) => vec![SocketAddr::new(addr.into(), port)],
+        Host::Ipv6(addr) => vec![SocketAddr::new(addr.into(), port)],
+        Host::Domain(domain) => {
+            // Do a DNS lookup for the domain using our custom DNS resolver
+            resolver
+                .resolve_str(domain)
+                .await?
+                .into_iter()
+                .map(|a| SocketAddr::new(a, port))
+                .collect()
+        }
+    };
+
+    let stream = TcpStream::connect(&sock_addrs[..]).await?;
+
+    tokio_tungstenite::client_async_tls(endpoint, stream)
+        .await
+        .map_err(Into::into)
+}
@@ -33,48 +33,3 @@ where
 {
    tokio::spawn(future);
 }
-
-#[derive(Clone, Default, Debug)]
-pub struct ForgetMe {
-    client: bool,
-    stats: bool,
-}
-
-impl ForgetMe {
-    pub fn new_all() -> Self {
-        Self {
-            client: true,
-            stats: true,
-        }
-    }
-
-    pub fn new_client() -> Self {
-        Self {
-            client: true,
-            stats: false,
-        }
-    }
-
-    pub fn new_stats() -> Self {
-        Self {
-            client: false,
-            stats: true,
-        }
-    }
-
-    pub fn new(client: bool, stats: bool) -> Self {
-        Self { client, stats }
-    }
-
-    pub fn any(&self) -> bool {
-        self.client || self.stats
-    }
-
-    pub fn client(&self) -> bool {
-        self.client
-    }
-
-    pub fn stats(&self) -> bool {
-        self.stats
-    }
-}
@@ -27,6 +27,7 @@ nym-credential-storage = { path = "../../credential-storage" }
 nym-credentials-interface = { path = "../../credentials-interface" }
 nym-crypto = { path = "../../crypto" }
 nym-gateway-requests = { path = "../../gateway-requests" }
+nym-http-api-client = { path = "../../http-api-client" }
 nym-network-defaults = { path = "../../network-defaults" }
 nym-sphinx = { path = "../../nymsphinx" }
 nym-statistics-common = { path = "../../statistics" }
@@ -40,8 +40,6 @@ use url::Url;
 use std::os::fd::RawFd;
 #[cfg(not(target_arch = "wasm32"))]
 use tokio::time::sleep;
-#[cfg(not(target_arch = "wasm32"))]
-use tokio_tungstenite::connect_async;

 #[cfg(not(unix))]
 use std::os::raw::c_int as RawFd;
@@ -53,6 +51,11 @@ use zeroize::Zeroizing;

 pub mod config;

+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) mod websockets;
+#[cfg(not(target_arch = "wasm32"))]
+use websockets::connect_async;
+
 pub struct GatewayConfig {
    pub gateway_identity: identity::PublicKey,

@@ -201,23 +204,15 @@ impl<C, St> GatewayClient<C, St> {
            "Attemting to establish connection to gateway at: {}",
            self.gateway_address
        );
-        let ws_stream = match connect_async(&self.gateway_address).await {
-            Ok((ws_stream, _)) => ws_stream,
-            Err(error) => {
-                return Err(GatewayClientError::NetworkConnectionFailed {
-                    address: self.gateway_address.clone(),
-                    source: error,
-                })
-            }
-        };
+        let (ws_stream, _) = connect_async(
+            &self.gateway_address,
+            #[cfg(unix)]
+            self.connection_fd_callback.clone(),
+        )
+        .await?;

        self.connection = SocketState::Available(Box::new(ws_stream));

-        #[cfg(unix)]
-        if let (Some(callback), Some(fd)) = (self.connection_fd_callback.as_ref(), self.ws_fd()) {
-            callback.as_ref()(fd);
-        }
-
        Ok(())
    }

@@ -271,6 +266,19 @@ impl<C, St> GatewayClient<C, St> {
        }
    }

+    pub async fn send_client_request(
+        &mut self,
+        message: ClientRequest,
+    ) -> Result<(), GatewayClientError> {
+        if let Some(shared_key) = self.shared_key() {
+            let encrypted = message.encrypt(&*shared_key)?;
+            Box::pin(self.send_websocket_message(encrypted)).await?;
+            Ok(())
+        } else {
+            Err(GatewayClientError::ConnectionInInvalidState)
+        }
+    }
+
    async fn read_control_response(&mut self) -> Result<ServerResponse, GatewayClientError> {
        // we use the fact that all request responses are Message::Text and only pushed
        // sphinx packets are Message::Binary
@@ -1045,7 +1053,7 @@ impl GatewayClient<InitOnly, EphemeralCredentialStorage> {
            connection: SocketState::NotConnected,
            packet_router,
            bandwidth_controller: None,
-            stats_reporter: ClientStatsSender::new(None),
+            stats_reporter: ClientStatsSender::new(None, task_client.clone()),
            negotiated_protocol: None,
            #[cfg(unix)]
            connection_fd_callback: None,
@@ -0,0 +1,88 @@
+use crate::error::GatewayClientError;
+
+use nym_http_api_client::HickoryDnsResolver;
+#[cfg(unix)]
+use std::{
+    os::fd::{AsRawFd, RawFd},
+    sync::Arc,
+};
+use tokio::net::TcpStream;
+use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};
+use tungstenite::handshake::client::Response;
+use url::{Host, Url};
+
+use std::net::SocketAddr;
+
+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) async fn connect_async(
+    endpoint: &str,
+    #[cfg(unix)] connection_fd_callback: Option<Arc<dyn Fn(RawFd) + Send + Sync>>,
+) -> Result<(WebSocketStream<MaybeTlsStream<TcpStream>>, Response), GatewayClientError> {
+    use tokio::net::TcpSocket;
+
+    let resolver = HickoryDnsResolver::default();
+    let uri =
+        Url::parse(endpoint).map_err(|_| GatewayClientError::InvalidUrl(endpoint.to_owned()))?;
+    let port: u16 = uri.port_or_known_default().unwrap_or(443);
+
+    let host = uri
+        .host()
+        .ok_or(GatewayClientError::InvalidUrl(endpoint.to_owned()))?;
+
+    // Get address for tcp connection, if a domain is provided use our preferred resolver rather than
+    // the default std resolve
+    let sock_addrs: Vec<SocketAddr> = match host {
+        Host::Ipv4(addr) => vec![SocketAddr::new(addr.into(), port)],
+        Host::Ipv6(addr) => vec![SocketAddr::new(addr.into(), port)],
+        Host::Domain(domain) => {
+            // Do a DNS lookup for the domain using our custom DNS resolver
+            resolver
+                .resolve_str(domain)
+                .await?
+                .into_iter()
+                .map(|a| SocketAddr::new(a, port))
+                .collect()
+        }
+    };
+
+    let mut stream = Err(GatewayClientError::NoEndpointForConnection {
+        address: endpoint.to_owned(),
+    });
+    for sock_addr in sock_addrs {
+        let socket = if sock_addr.is_ipv4() {
+            TcpSocket::new_v4()
+        } else {
+            TcpSocket::new_v6()
+        }
+        .map_err(|err| GatewayClientError::NetworkConnectionFailed {
+            address: endpoint.to_owned(),
+            source: err.into(),
+        })?;
+
+        #[cfg(unix)]
+        if let Some(callback) = connection_fd_callback.as_ref() {
+            callback.as_ref()(socket.as_raw_fd());
+        }
+
+        match socket.connect(sock_addr).await {
+            Ok(s) => {
+                stream = Ok(s);
+                break;
+            }
+            Err(err) => {
+                stream = Err(GatewayClientError::NetworkConnectionFailed {
+                    address: endpoint.to_owned(),
+                    source: err.into(),
+                });
+                continue;
+            }
+        }
+    }
+
+    tokio_tungstenite::client_async_tls(endpoint, stream?)
+        .await
+        .map_err(|error| GatewayClientError::NetworkConnectionFailed {
+            address: endpoint.to_owned(),
+            source: error,
+        })
+}
@@ -43,8 +43,15 @@ pub enum GatewayClientError {
    #[error("connection failed: {address}: {source}")]
    NetworkConnectionFailed { address: String, source: WsError },

+    #[error("no socket address for endpoint: {address}")]
+    NoEndpointForConnection { address: String },
+
    #[error("Invalid URL: {0}")]
-    InvalidURL(String),
+    InvalidUrl(String),
+
+    #[cfg(not(target_arch = "wasm32"))]
+    #[error("resolution failed: {0}")]
+    ResolutionFailed(#[from] nym_http_api_client::HickoryDnsError),

    #[error("No shared key was provided or obtained")]
    NoSharedKeyAvailable,
@@ -11,8 +11,7 @@ use crate::{
 use nym_api_requests::ecash::models::{
    AggregatedCoinIndicesSignatureResponse, AggregatedExpirationDateSignatureResponse,
    BatchRedeemTicketsBody, EcashBatchTicketRedemptionResponse, EcashTicketVerificationResponse,
-    IssuedTicketbooksChallengeResponse, IssuedTicketbooksForResponse, SpentCredentialsResponse,
-    VerifyEcashTicketBody,
+    IssuedTicketbooksChallengeResponse, IssuedTicketbooksForResponse, VerifyEcashTicketBody,
 };
 use nym_api_requests::ecash::{
    BlindSignRequestBody, BlindedSignatureResponse, PartialCoinIndicesSignatureResponse,
@@ -647,13 +646,6 @@ impl NymApiClient {
            .await?)
    }

-    #[deprecated]
-    pub async fn spent_credentials_filter(
-        &self,
-    ) -> Result<SpentCredentialsResponse, ValidatorClientError> {
-        Ok(self.nym_api.double_spending_filter_v1().await?)
-    }
-
    pub async fn partial_expiration_date_signatures(
        &self,
        expiration_date: Option<Date>,
@@ -65,6 +65,12 @@ pub enum EcashApiError {
        #[from]
        source: cosmrs::ErrorReport,
    },
+
+    #[error("nym api error")]
+    NymApi {
+        #[from]
+        source: crate::ValidatorClientError,
+    },
 }

 impl TryFrom<ContractVKShare> for EcashApiClient {
@@ -31,6 +31,7 @@ pub use nym_api_requests::{
        StakeSaturationResponse, UptimeResponse,
    },
    nym_nodes::{CachedNodesResponse, SkimmedNode},
+    NymNetworkDetailsResponse,
 };
 pub use nym_coconut_dkg_common::types::EpochId;
 use nym_contracts_common::IdentityKey;
@@ -849,20 +850,6 @@ pub trait NymApiClientExt: ApiClient {
        .await
    }

-    #[deprecated]
-    #[instrument(level = "debug", skip(self))]
-    async fn double_spending_filter_v1(&self) -> Result<SpentCredentialsResponse, NymAPIError> {
-        self.get_json(
-            &[
-                routes::API_VERSION,
-                routes::ECASH_ROUTES,
-                routes::DOUBLE_SPENDING_FILTER_V1,
-            ],
-            NO_PARAMS,
-        )
-        .await
-    }
-
    #[instrument(level = "debug", skip(self))]
    async fn partial_expiration_date_signatures(
        &self,
@@ -1027,6 +1014,15 @@ pub trait NymApiClientExt: ApiClient {
        )
        .await
    }
+
+    #[instrument(level = "debug", skip(self))]
+    async fn get_network_details(&self) -> Result<NymNetworkDetailsResponse, NymAPIError> {
+        self.get_json(
+            &[routes::API_VERSION, routes::NETWORK, routes::DETAILS],
+            NO_PARAMS,
+        )
+        .await
+    }
 }

 #[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
@@ -13,8 +13,6 @@ pub const DETAILED: &str = "detailed";
 pub const DETAILED_UNFILTERED: &str = "detailed-unfiltered";
 pub const ACTIVE: &str = "active";
 pub const REWARDED: &str = "rewarded";
-pub const DOUBLE_SPENDING_FILTER_V1: &str = "double-spending-filter-v1";
-
 pub const ECASH_ROUTES: &str = "ecash";

 pub use ecash::*;
@@ -67,6 +65,8 @@ pub const STAKE_SATURATION: &str = "stake-saturation";
 pub const INCLUSION_CHANCE: &str = "inclusion-probability";
 pub const SUBMIT_GATEWAY: &str = "submit-gateway-monitoring-results";
 pub const SUBMIT_NODE: &str = "submit-node-monitoring-results";
-pub const PERFORMANCE: &str = "performance";

 pub const SERVICE_PROVIDERS: &str = "services";
+
+pub const DETAILS: &str = "details";
+pub const NETWORK: &str = "network";
@@ -8,81 +8,81 @@ use thiserror::Error;

 #[derive(Error, Debug, PartialEq)]
 pub enum VestingContractError {
-    #[error("VESTING ({}): {0}", line!())]
+    #[error("VESTING ({l}): {0}", l = line!())]
    Std(#[from] StdError),

    #[error("VESTING: {0}")]
    OverflowError(#[from] OverflowError),

-    #[error("VESTING ({}): Account does not exist - {0}", line!())]
+    #[error("VESTING ({l}): Account does not exist - {0}", l = line!())]
    NoAccountForAddress(String),

-    #[error("VESTING ({}): Only admin can perform this action, {0} is not admin", line!())]
+    #[error("VESTING ({l}): Only admin can perform this action, {0} is not admin", l = line!())]
    NotAdmin(String),

-    #[error("VESTING ({}): Balance not found for existing account ({0}), this is a bug", line!())]
+    #[error("VESTING ({l}): Balance not found for existing account ({0}), this is a bug", l = line!())]
    NoBalanceForAddress(String),

-    #[error("VESTING ({}): Insufficient balance for address {0} -> {1}", line!())]
+    #[error("VESTING ({l}): Insufficient balance for address {0} -> {1}", l = line!())]
    InsufficientBalance(String, u128),

-    #[error("VESTING ({}): Insufficient spendable balance for address {0} -> {1}", line!())]
+    #[error("VESTING ({l}): Insufficient spendable balance for address {0} -> {1}", l = line!())]
    InsufficientSpendable(String, u128),

    #[error(
-    "VESTING ({}):Only delegation owner can perform delegation actions, {0} is not the delegation owner"
-    , line!())]
+    "VESTING ({l}):Only delegation owner can perform delegation actions, {0} is not the delegation owner"
+    , l = line!())]
    NotDelegate(String),

-    #[error("VESTING ({}): Total vesting amount is inprobably low -> {0}, this is likely an error", line!())]
+    #[error("VESTING ({l}): Total vesting amount is inprobably low -> {0}, this is likely an error", l = line!())]
    ImprobableVestingAmount(u128),

-    #[error("VESTING ({}): Address {0} has already bonded a node", line!())]
+    #[error("VESTING ({l}): Address {0} has already bonded a node", l = line!())]
    AlreadyBonded(String),

-    #[error("VESTING ({}): Received empty funds vector", line!())]
+    #[error("VESTING ({l}): Received empty funds vector", l = line!())]
    EmptyFunds,

-    #[error("VESTING ({}): Received wrong denom: {0}, expected {1}", line!())]
+    #[error("VESTING ({l}): Received wrong denom: {0}, expected {1}", l = line!())]
    WrongDenom(String, String),

-    #[error("VESTING ({}): Received multiple denoms, expected 1", line!())]
+    #[error("VESTING ({l}): Received multiple denoms, expected 1", l = line!())]
    MultipleDenoms,

-    #[error("VESTING ({}): No delegations found for account {0}, mix_identity {1}", line!())]
+    #[error("VESTING ({l}): No delegations found for account {0}, mix_identity {1}", l = line!())]
    NoSuchDelegation(Addr, NodeId),

-    #[error("VESTING ({}): Only mixnet contract can perform this operation, got {0}", line!())]
+    #[error("VESTING ({l}): Only mixnet contract can perform this operation, got {0}", l = line!())]
    NotMixnetContract(Addr),

-    #[error("VESTING ({}): Calculation underflowed", line!())]
+    #[error("VESTING ({l}): Calculation underflowed", l = line!())]
    Underflow,

-    #[error("VESTING ({}): No bond found for account {0}", line!())]
+    #[error("VESTING ({l}): No bond found for account {0}", l = line!())]
    NoBondFound(String),

    #[error("VESTING: Attempted to reduce mixnode bond pledge below zero! The current pledge is {current} and we attempted to reduce it by {decrease_by}.")]
    InvalidBondPledgeReduction { current: Coin, decrease_by: Coin },

-    #[error("VESTING ({}): Action can only be executed by account owner -> {0}", line!())]
+    #[error("VESTING ({l}): Action can only be executed by account owner -> {0}", l = line!())]
    NotOwner(String),

-    #[error("VESTING ({}): Invalid address: {0}", line!())]
+    #[error("VESTING ({l}): Invalid address: {0}", l = line!())]
    InvalidAddress(String),

-    #[error("VESTING ({}): Account already exists: {0}", line!())]
+    #[error("VESTING ({l}): Account already exists: {0}", l = line!())]
    AccountAlreadyExists(String),

-    #[error("VESTING ({}): Staking account already exists: {0}", line!())]
+    #[error("VESTING ({l}): Staking account already exists: {0}", l = line!())]
    StakingAccountAlreadyExists(String),

-    #[error("VESTING ({}): Too few coins sent for vesting account creation, sent {sent}, need at least {need}", line!())]
+    #[error("VESTING ({l}): Too few coins sent for vesting account creation, sent {sent}, need at least {need}", l = line!())]
    MinVestingFunds { sent: u128, need: u128 },

-    #[error("VESTING ({}): Maximum amount of locked coins has already been pledged: {current}, cap is {cap}", line!())]
+    #[error("VESTING ({l}): Maximum amount of locked coins has already been pledged: {current}, cap is {cap}", l = line!())]
    LockedPledgeCapReached { current: Uint128, cap: Uint128 },

-    #[error("VESTING: ({}: Account owned by {owner} has unpopulated vesting periods!", line!())]
+    #[error("VESTING: ({l}: Account owned by {owner} has unpopulated vesting periods!", l = line!())]
    UnpopulatedVestingPeriods { owner: Addr },

    #[error("VESTING: Vesting account associated with {0} already exists, only addresses with not existing vesting accounts can be added as staking addresses")]
@@ -26,7 +26,6 @@ nym-api-requests = { path = "../../nym-api/nym-api-requests" }
 nym-credentials = { path = "../credentials" }
 nym-credentials-interface = { path = "../credentials-interface" }
 nym-ecash-contract-common = { path = "../cosmwasm-smart-contracts/ecash-contract" }
-nym-ecash-double-spending = { path = "../ecash-double-spending" }
 nym-gateway-requests = { path = "../gateway-requests" }
 nym-gateway-storage = { path = "../gateway-storage" }
 nym-task = { path = "../task" }
@@ -13,6 +13,7 @@ use nym_api_requests::constants::MIN_BATCH_REDEMPTION_DELAY;
 use nym_api_requests::ecash::models::{BatchRedeemTicketsBody, VerifyEcashTicketBody};
 use nym_credentials_interface::Bandwidth;
 use nym_credentials_interface::{ClientTicket, TicketType};
+use nym_validator_client::coconut::EcashApiError;
 use nym_validator_client::nym_api::EpochId;
 use nym_validator_client::nyxd::contract_traits::{
    EcashSigningClient, MultisigQueryClient, MultisigSigningClient, PagedMultisigQueryClient,
@@ -352,7 +353,9 @@ impl CredentialHandler {
            }
            Err(err) => {
                error!("failed to send ticket {ticket_id} for verification to ecash signer '{client}': {err}. if we don't reach quorum, we'll retry later");
-                Ok(false)
+                Err(EcashTicketError::ApiFailure(EcashApiError::NymApi {
+                    source: err,
+                }))
            }
        }
    }
@@ -24,6 +24,7 @@ ed25519-dalek = { workspace = true, features = ["rand_core"], optional = true }
 rand = { workspace = true, optional = true }
 serde_bytes = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"], optional = true }
+sha2 = { workspace = true, optional = true }
 subtle-encoding = { workspace = true, features = ["bech32-preview"] }
 thiserror = { workspace = true }
 zeroize = { workspace = true, optional = true, features = ["zeroize_derive"] }
@@ -36,11 +37,10 @@ nym-pemstore = { path = "../../common/pemstore", version = "0.3.0" }
 rand_chacha = { workspace = true }

 [features]
-default = ["sphinx"]
+default = []
 aead = ["dep:aead", "aead/std", "aes-gcm-siv", "generic-array"]
 serde = ["dep:serde", "serde_bytes", "ed25519-dalek/serde", "x25519-dalek/serde"]
 asymmetric = ["x25519-dalek", "ed25519-dalek", "zeroize"]
-hashing = ["blake3", "digest", "hkdf", "hmac", "generic-array"]
+hashing = ["blake3", "digest", "hkdf", "hmac", "generic-array", "sha2"]
 stream_cipher = ["aes", "ctr", "cipher", "generic-array"]
-sphinx = ["nym-sphinx-types/sphinx"]
-outfox = ["nym-sphinx-types/outfox"]
+sphinx = ["nym-sphinx-types/sphinx"]
@@ -202,6 +202,18 @@ impl PemStorableKey for PublicKey {
    }
 }

+impl From<x25519_dalek::PublicKey> for PublicKey {
+    fn from(public_key: x25519_dalek::PublicKey) -> Self {
+        PublicKey(public_key)
+    }
+}
+
+impl From<PublicKey> for x25519_dalek::PublicKey {
+    fn from(public_key: PublicKey) -> Self {
+        public_key.0
+    }
+}
+
 #[derive(Zeroize, ZeroizeOnDrop)]
 pub struct PrivateKey(x25519_dalek::StaticSecret);

@@ -308,109 +320,15 @@ impl PemStorableKey for PrivateKey {
    }
 }

-// compatibility with sphinx keys:
-#[cfg(feature = "sphinx")]
-impl From<PublicKey> for nym_sphinx_types::PublicKey {
-    fn from(key: PublicKey) -> Self {
-        nym_sphinx_types::PublicKey::from(key.to_bytes())
+impl From<x25519_dalek::StaticSecret> for PrivateKey {
+    fn from(secret: x25519_dalek::StaticSecret) -> Self {
+        PrivateKey(secret)
    }
 }

-#[cfg(feature = "sphinx")]
-impl<'a> From<&'a PublicKey> for nym_sphinx_types::PublicKey {
-    fn from(key: &'a PublicKey) -> Self {
-        nym_sphinx_types::PublicKey::from((*key).to_bytes())
-    }
-}
-
-#[cfg(feature = "sphinx")]
-impl From<nym_sphinx_types::PublicKey> for PublicKey {
-    fn from(pub_key: nym_sphinx_types::PublicKey) -> Self {
-        Self(x25519_dalek::PublicKey::from(*pub_key.as_bytes()))
-    }
-}
-
-#[cfg(feature = "sphinx")]
-impl From<PrivateKey> for nym_sphinx_types::PrivateKey {
-    fn from(key: PrivateKey) -> Self {
-        nym_sphinx_types::PrivateKey::from(key.to_bytes())
-    }
-}
-
-#[cfg(feature = "sphinx")]
-impl<'a> From<&'a PrivateKey> for nym_sphinx_types::PrivateKey {
-    fn from(key: &'a PrivateKey) -> Self {
-        nym_sphinx_types::PrivateKey::from(key.to_bytes())
-    }
-}
-
-#[cfg(feature = "sphinx")]
-impl From<nym_sphinx_types::PrivateKey> for PrivateKey {
-    fn from(private_key: nym_sphinx_types::PrivateKey) -> Self {
-        let private_key_bytes = private_key.to_bytes();
-        assert_eq!(private_key_bytes.len(), PRIVATE_KEY_SIZE);
-        Self::from_bytes(&private_key_bytes).unwrap()
-    }
-}
-
-#[cfg(test)]
-mod sphinx_key_conversion {
-    use super::*;
-    use rand_chacha::rand_core::SeedableRng;
-    use rand_chacha::ChaCha20Rng;
-
-    pub(super) fn test_rng() -> ChaCha20Rng {
-        let dummy_seed = [42u8; 32];
-        ChaCha20Rng::from_seed(dummy_seed)
-    }
-
-    const NUM_ITERATIONS: usize = 100;
-
-    #[test]
-    fn works_for_forward_conversion() {
-        let mut rng = test_rng();
-
-        for _ in 0..NUM_ITERATIONS {
-            let keys = KeyPair::new(&mut rng);
-            let private = &keys.private_key;
-            let public = &keys.public_key;
-
-            let dummy_remote = KeyPair::new(&mut rng);
-            let dh1 = private.diffie_hellman(&dummy_remote.public_key);
-
-            let public_bytes = public.to_bytes();
-
-            let sphinx_private: nym_sphinx_types::PrivateKey = private.into();
-            let recovered_private = PrivateKey::from(sphinx_private);
-
-            let dh2 = recovered_private.diffie_hellman(&dummy_remote.public_key);
-
-            let sphinx_public: nym_sphinx_types::PublicKey = public.into();
-            let recovered_public = PublicKey::from(sphinx_public);
-            assert_eq!(public_bytes, recovered_public.to_bytes());
-
-            // even though the byte representation of the private key changed, the resultant DH is the same
-            // which is what matters
-            assert_eq!(dh1, dh2);
-        }
-    }
-
-    #[test]
-    fn works_for_backward_conversion() {
-        for _ in 0..NUM_ITERATIONS {
-            let (sphinx_private, sphinx_public) = nym_sphinx_types::crypto::keygen();
-
-            let private_bytes = sphinx_private.to_bytes();
-            let public_bytes = sphinx_public.as_bytes();
-
-            let private: PrivateKey = sphinx_private.into();
-            let recovered_sphinx_private: nym_sphinx_types::PrivateKey = private.into();
-
-            let public: PublicKey = sphinx_public.into();
-            let recovered_sphinx_public: nym_sphinx_types::PublicKey = public.into();
-            assert_eq!(private_bytes, recovered_sphinx_private.to_bytes());
-            assert_eq!(public_bytes, recovered_sphinx_public.as_bytes());
-        }
+impl AsRef<x25519_dalek::StaticSecret> for PrivateKey {
+    fn as_ref(&self) -> &x25519_dalek::StaticSecret {
+        &self.0
    }
 }

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0

 pub use ed25519_dalek::SignatureError;
-use ed25519_dalek::{Signer, SigningKey};
+use ed25519_dalek::{SecretKey, Signer, SigningKey};
 pub use ed25519_dalek::{Verifier, PUBLIC_KEY_LENGTH, SECRET_KEY_LENGTH, SIGNATURE_LENGTH};
 use nym_pemstore::traits::{PemStorableKey, PemStorableKeyPair};
 use std::fmt::{self, Debug, Display, Formatter};
@@ -18,7 +18,7 @@ pub mod serde_helpers;
 use nym_sphinx_types::{DestinationAddressBytes, DESTINATION_ADDRESS_LENGTH};

 #[cfg(feature = "rand")]
-use rand::{CryptoRng, RngCore};
+use rand::{CryptoRng, Rng, RngCore};
 #[cfg(feature = "serde")]
 use serde::de::Error as SerdeError;
 #[cfg(feature = "serde")]
@@ -62,16 +62,33 @@ pub struct KeyPair {
    // nothing secret about public key
    #[zeroize(skip)]
    public_key: PublicKey,
+
+    #[zeroize(skip)]
+    index: u32,
 }

+/// All keys will always have an index field populated this is to prevent anyone from figuring out if
+/// the keys are derived or random, and alter their behaviour based on that.
 impl KeyPair {
    #[cfg(feature = "rand")]
    pub fn new<R: RngCore + CryptoRng>(rng: &mut R) -> Self {
+        let index = rng.gen();
        let ed25519_signing_key = ed25519_dalek::SigningKey::generate(rng);

        KeyPair {
            private_key: PrivateKey(ed25519_signing_key.to_bytes()),
            public_key: PublicKey(ed25519_signing_key.verifying_key()),
+            index,
+        }
+    }
+
+    pub fn from_secret(secret: SecretKey, index: u32) -> Self {
+        let ed25519_signing_key = SigningKey::from(secret);
+
+        KeyPair {
+            private_key: PrivateKey(ed25519_signing_key.to_bytes()),
+            public_key: PublicKey(ed25519_signing_key.verifying_key()),
+            index,
        }
    }

@@ -87,15 +104,31 @@ impl KeyPair {
        Ok(KeyPair {
            private_key: PrivateKey::from_bytes(priv_bytes)?,
            public_key: PublicKey::from_bytes(pub_bytes)?,
+            index: fake_index(pub_bytes),
        })
    }
 }

+/// Reduces a byte slice into a u32 value by XOR-ing all its bytes into a 4-byte accumulator.
+/// The process iterates over every byte in the input slice, XOR-ing each one into a slot based on its index modulo 4.
+/// If the input slice contains fewer than 4 bytes, the remaining positions in the accumulator remain zero.
+/// Finally, the accumulator is interpreted in big-endian order to produce the resulting u32.
+/// Index is used to verify deterministic identity key, master key and salt are also requried for verification.
+fn fake_index(input: &[u8]) -> u32 {
+    let mut accumulator = [0u8; 4];
+    for (i, &byte) in input.iter().enumerate() {
+        accumulator[i % 4] ^= byte;
+    }
+    u32::from_be_bytes(accumulator)
+}
+
 impl From<PrivateKey> for KeyPair {
    fn from(private_key: PrivateKey) -> Self {
+        let public_key = (&private_key).into();
        KeyPair {
-            public_key: (&private_key).into(),
+            public_key,
            private_key,
+            index: fake_index(public_key.to_bytes().as_ref()),
        }
    }
 }
@@ -115,6 +148,7 @@ impl PemStorableKeyPair for KeyPair {
        KeyPair {
            private_key,
            public_key,
+            index: fake_index(public_key.to_bytes().as_ref()),
        }
    }
 }
@@ -8,6 +8,10 @@ use hkdf::{
    },
    Hkdf,
 };
+use sha2::{Sha256, Sha512};
+
+pub use hkdf::InvalidLength;
+use zeroize::ZeroizeOnDrop;

 /// Perform HKDF `extract` then `expand` as a single step.
 pub fn extract_then_expand<D>(
@@ -28,3 +32,80 @@ where

    Ok(okm)
 }
+
+/// `DerivationMaterial` encapsulates parameters for deterministic key derivation using
+/// HKDF (SHA-512).
+///
+/// It consists of:
+///   - A master key (`master_key`): the base secret.
+///   - An index (`index`): ensures unique derivations.
+///   - A salt (`salt`): adds additional uniqueness, should be application specific.
+///
+/// Use the `derive_secret()` method to generate a 32-byte secret. To prepare for a new derivation,
+/// call the `next()` method, which increments the index. **It is the caller's responsibility to
+/// track and persist the derivation index if keys need to be rederived.**
+///
+/// # Example
+///
+/// ```rust
+/// use nym_crypto::hkdf::DerivationMaterial;
+///
+/// let master_key = [0u8; 32]; // your secret master key
+/// let salt = b"unique-salt-value";
+/// let material = DerivationMaterial::new(master_key, 0, salt);
+///
+/// // Derive a secret
+/// let secret = material.derive_secret().expect("Failed to derive secret");
+///
+/// // Prepare for the next derivation
+/// let next_material = material.next();
+/// ```
+#[derive(ZeroizeOnDrop)]
+pub struct DerivationMaterial {
+    master_key: [u8; 32],
+    index: u32,
+    salt: Vec<u8>,
+}
+
+impl DerivationMaterial {
+    pub fn index(&self) -> u32 {
+        self.index
+    }
+
+    pub fn salt(&self) -> &[u8] {
+        &self.salt
+    }
+
+    /// Derives a 32-byte seed from a master seed and an index using HKDF (with SHA-512).
+    ///
+    /// The `salt` and the use of the index (as info) bind this derivation to an application/client.
+    pub fn derive_secret(&self) -> Result<[u8; 32], hkdf::InvalidLength> {
+        let salt = &self.salt;
+        let info = self.index.to_be_bytes(); // Use the index as info
+        let hk = Hkdf::<Sha512>::new(Some(salt), &self.master_key);
+        let mut okm = [0u8; 32];
+        hk.expand(&info, &mut okm)?;
+        Ok(okm)
+    }
+
+    pub fn new<T: AsRef<[u8]>>(master_key: T, index: u32, salt: &[u8]) -> Self {
+        // Coerce master_key to [u8; 32]
+        let mut hasher = Sha256::new();
+        hasher.update(master_key.as_ref());
+        let master_key = hasher.finalize().into();
+
+        Self {
+            master_key,
+            index,
+            salt: salt.to_vec(),
+        }
+    }
+
+    pub fn next(&self) -> Self {
+        Self {
+            master_key: self.master_key,
+            index: self.index + 1,
+            salt: self.salt.clone(),
+        }
+    }
+}
@@ -1,14 +0,0 @@
-[package]
-name = "nym-ecash-double-spending"
-version = "0.1.0"
-authors.workspace = true
-repository.workspace = true
-homepage.workspace = true
-documentation.workspace = true
-edition.workspace = true
-license.workspace = true
-
-[dependencies]
-bit-vec = { workspace = true }
-bloomfilter = { workspace = true }
-nym-network-defaults = { path = "../network-defaults" }
@@ -1,136 +0,0 @@
-// Copyright 2024 - Nym Technologies SA <contact@nymtech.net>
-// SPDX-License-Identifier: Apache-2.0
-
-use bit_vec::BitVec;
-use bloomfilter::Bloom;
-use nym_network_defaults::{BloomfilterParameters, ECASH_DS_BLOOMFILTER_PARAMS};
-
-pub struct DoubleSpendingFilter {
-    params: BloomfilterParameters,
-    inner: Bloom<Vec<u8>>,
-}
-
-impl Default for DoubleSpendingFilter {
-    fn default() -> Self {
-        DoubleSpendingFilter::new_empty_ecash()
-    }
-}
-
-pub fn bloom_from_params<T>(params: &BloomfilterParameters, bitvec: BitVec) -> Bloom<Vec<T>> {
-    assert_eq!(params.bitmap_size, bitvec.len() as u64);
-
-    Bloom::from_bit_vec(
-        bitvec,
-        params.bitmap_size,
-        params.num_hashes,
-        params.sip_keys,
-    )
-}
-
-impl DoubleSpendingFilter {
-    pub fn new_empty(params: BloomfilterParameters) -> Self {
-        let bitvec = BitVec::from_elem(params.bitmap_size as usize, false);
-        DoubleSpendingFilter {
-            inner: bloom_from_params(&params, bitvec),
-            params,
-        }
-    }
-
-    pub fn params(&self) -> BloomfilterParameters {
-        self.params
-    }
-
-    pub fn rebuild(&self) -> DoubleSpendingFilterBuilder {
-        DoubleSpendingFilterBuilder::new(self.params)
-    }
-
-    pub fn reset(&mut self) {
-        self.inner.clear()
-    }
-
-    pub fn new_empty_ecash() -> Self {
-        DoubleSpendingFilter::new_empty(ECASH_DS_BLOOMFILTER_PARAMS)
-    }
-
-    pub fn builder(params: BloomfilterParameters) -> DoubleSpendingFilterBuilder {
-        DoubleSpendingFilterBuilder::new(params)
-    }
-
-    pub fn from_bytes(params: BloomfilterParameters, bitmap: &[u8]) -> Self {
-        DoubleSpendingFilter {
-            inner: bloom_from_params(&params, BitVec::from_bytes(bitmap)),
-            params,
-        }
-    }
-
-    pub fn replace_bitvec(&mut self, new: BitVec) {
-        self.inner = bloom_from_params(&self.params, new)
-    }
-
-    pub fn dump_bitmap(&self) -> Vec<u8> {
-        self.inner.bitmap()
-    }
-
-    pub fn set(&mut self, b: &Vec<u8>) {
-        self.inner.set(b);
-    }
-
-    pub fn check(&self, b: &Vec<u8>) -> bool {
-        self.inner.check(b)
-    }
-}
-
-pub struct DoubleSpendingFilterBuilder {
-    params: BloomfilterParameters,
-    bit_vec_builder: Option<BitVecBuilder>,
-}
-
-impl DoubleSpendingFilterBuilder {
-    pub fn new(params: BloomfilterParameters) -> Self {
-        DoubleSpendingFilterBuilder {
-            params,
-            bit_vec_builder: None,
-        }
-    }
-
-    pub fn add_bytes(&mut self, b: &[u8]) -> bool {
-        match &mut self.bit_vec_builder {
-            None => {
-                self.bit_vec_builder = Some(BitVecBuilder::new(b));
-                true
-            }
-            Some(builder) => builder.add_bytes(b),
-        }
-    }
-
-    pub fn build(self) -> DoubleSpendingFilter {
-        match self.bit_vec_builder {
-            None => DoubleSpendingFilter::new_empty(self.params),
-            Some(builder) => DoubleSpendingFilter {
-                inner: bloom_from_params(&self.params, builder.finish()),
-                params: self.params,
-            },
-        }
-    }
-}
-
-pub struct BitVecBuilder(BitVec);
-
-impl BitVecBuilder {
-    pub fn new(initial_bitmap: &[u8]) -> Self {
-        BitVecBuilder(BitVec::from_bytes(initial_bitmap))
-    }
-
-    pub fn add_bytes(&mut self, b: &[u8]) -> bool {
-        let add = BitVec::from_bytes(b);
-        if self.0.len() != add.len() {
-            return false;
-        }
-        self.0.or(&add);
-        true
-    }
-
-    pub fn finish(self) -> BitVec {
-        self.0
-    }
-}
@@ -59,12 +59,12 @@ pub enum GatewayRequestsError {
        source: NymNodeRoutingAddressError,
    },

-    #[error("received request had invalid size. (actual: {0}, but expected one of: {} (ACK), {} (REGULAR), {}, {}, {} (EXTENDED))",
-        PacketSize::AckPacket.size(),
-        PacketSize::RegularPacket.size(),
-        PacketSize::ExtendedPacket8.size(),
-        PacketSize::ExtendedPacket16.size(),
-        PacketSize::ExtendedPacket32.size())
+    #[error("received request had invalid size. (actual: {0}, but expected one of: {a} (ACK), {r} (REGULAR), {e8}, {e16}, {e32} (EXTENDED))",
+        a = PacketSize::AckPacket.size(),
+        r = PacketSize::RegularPacket.size(),
+        e8 = PacketSize::ExtendedPacket8.size(),
+        e16 = PacketSize::ExtendedPacket16.size(),
+        e32 = PacketSize::ExtendedPacket32.size())
    ]
    RequestOfInvalidSize(usize),

@@ -13,7 +13,7 @@ use std::str::FromStr;
 use tungstenite::Message;

 // wrapper for all encrypted requests for ease of use
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 #[non_exhaustive]
 pub enum ClientRequest {
    UpgradeKey {
@@ -3,5 +3,22 @@
 * SPDX-License-Identifier: GPL-3.0-only
 */

+
 ALTER TABLE message_store
-    ADD COLUMN timestamp TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP;
+    RENAME TO message_store_old;
+
+-- add new column with message timestamp. 
+-- note: we can't simply alter existing table to add it since the default value is non-constant
+CREATE TABLE message_store
+(
+    id                  INTEGER                     NOT NULL PRIMARY KEY AUTOINCREMENT,
+    client_address_bs58 TEXT                        NOT NULL,
+    content             BLOB                        NOT NULL,
+    timestamp           TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+INSERT INTO message_store(id, client_address_bs58, content)
+SELECT id, client_address_bs58, content
+FROM message_store_old;
+DROP TABLE message_store_old;
+
@@ -12,7 +12,7 @@ license.workspace = true

 [dependencies]
 async-trait = { workspace = true }
-reqwest = { workspace = true, features = ["json"] }
+reqwest = { workspace = true, features = ["json", "gzip"] }
 http.workspace = true
 url = { workspace = true }
 once_cell = { workspace = true }
@@ -40,6 +40,7 @@ struct SocketAddrs {

 #[derive(Debug, thiserror::Error)]
 #[error("hickory-dns resolver error: {hickory_error}")]
+/// Error occurring while resolving a hostname into an IP address.
 pub struct HickoryDnsError {
    #[from]
    hickory_error: ResolveError,
@@ -7,11 +7,16 @@ use http::HeaderValue;
 use nym_bin_common::build_information::{BinaryBuildInformation, BinaryBuildInformationOwned};
 use serde::{Deserialize, Serialize};

+/// Characteristic elements sent to the API providing basic context information of the requesting client.
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct UserAgent {
+    /// The internal crate / application / subsystem making use of API client
    pub application: String,
+    /// version of the calling crate / application / subsystem
    pub version: String,
+    /// client platform
    pub platform: String,
+    /// source commit version for the calling calling crate / subsystem
    pub git_commit: String,
 }

@@ -20,6 +20,7 @@ mime = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
 serde_yaml = { workspace = true }
+subtle.workspace = true
 tower = { workspace = true }
 tracing.workspace = true
 utoipa = { workspace = true, optional = true }
@@ -7,6 +7,7 @@ use axum::{extract::Request, response::Response};
 use futures::future::BoxFuture;
 use std::sync::Arc;
 use std::task::{Context, Poll};
+use subtle::ConstantTimeEq;
 use tower::{Layer, Service};
 use tracing::{debug, instrument, trace};
 use zeroize::Zeroizing;
@@ -76,7 +77,7 @@ impl<S> RequireAuth<S> {
            return Err("`Authorization` header must contain non-empty `Bearer` token");
        }

-        if self.bearer_token.as_str() != bearer_token {
+        if bool::from(self.bearer_token.as_bytes().ct_ne(bearer_token.as_bytes())) {
            return Err("`Authorization` header does not contain the correct `Bearer` token");
        }

@@ -26,4 +26,4 @@ utoipa = [ "dep:utoipa" ]

 [build-dependencies]
 regex = { workspace = true }
-cargo_metadata = { version = "0.18" }
+cargo_metadata = { workspace = true }
@@ -31,7 +31,7 @@ nym-pemstore = { path = "../pemstore" }
 nym-network-defaults = { path = "../network-defaults", default-features = false }

 [dev-dependencies]
-criterion = { version = "0.5.1", features = ["html_reports"] }
+criterion = { workspace = true, features = ["html_reports"] }


 [[bench]]
@@ -48,12 +48,10 @@ features = ["sync"]
 [features]
 default = ["sphinx"]
 sphinx = [
-    "nym-crypto/sphinx",
    "nym-sphinx-params/sphinx",
    "nym-sphinx-types/sphinx",
 ]
 outfox = [
-    "nym-crypto/outfox",
    "nym-sphinx-params/outfox",
    "nym-sphinx-types/outfox",
 ]
@@ -8,7 +8,7 @@ license = { workspace = true }
 repository = { workspace = true }

 [dependencies]
-nym-crypto = { path = "../../crypto", features = ["asymmetric"] } # all addresses are expressed in terms on their crypto keys
+nym-crypto = { path = "../../crypto", features = ["asymmetric", "sphinx"] } # all addresses are expressed in terms on their crypto keys
 nym-sphinx-types = { path = "../types", features = ["sphinx"] } # we need to be able to refer to some types defined inside sphinx crate
 serde = { workspace = true } # implementing serialization/deserialization for some types, like `Recipient`
 thiserror = { workspace = true }
@@ -559,7 +559,7 @@ mod tests {
            let mut address_bytes = [0; NODE_ADDRESS_LENGTH];
            rng.fill_bytes(&mut address_bytes);

-            let dummy_private = PrivateKey::new_with_rng(rng);
+            let dummy_private = PrivateKey::random_from_rng(rng);
            let pub_key = (&dummy_private).into();
            Node {
                address: NodeAddressBytes::from_bytes(address_bytes),
@@ -130,28 +130,33 @@ impl Decoder for NymCodec {
 mod packet_encoding {
    use super::*;
    use nym_sphinx_types::{
-        crypto, Delay as SphinxDelay, Destination, DestinationAddressBytes, Node, NodeAddressBytes,
-        DESTINATION_ADDRESS_LENGTH, IDENTIFIER_LENGTH, NODE_ADDRESS_LENGTH,
+        Delay as SphinxDelay, Destination, DestinationAddressBytes, Node, NodeAddressBytes,
+        PrivateKey, DESTINATION_ADDRESS_LENGTH, IDENTIFIER_LENGTH, NODE_ADDRESS_LENGTH,
    };

+    fn random_pubkey() -> nym_sphinx_types::PublicKey {
+        let private_key = PrivateKey::random();
+        (&private_key).into()
+    }
+
    fn make_valid_outfox_packet(size: PacketSize) -> NymPacket {
-        let (_, node1_pk) = crypto::keygen();
+        let node1_pk = random_pubkey();
        let node1 = Node::new(
            NodeAddressBytes::from_bytes([5u8; NODE_ADDRESS_LENGTH]),
            node1_pk,
        );
-        let (_, node2_pk) = crypto::keygen();
+        let node2_pk = random_pubkey();
        let node2 = Node::new(
            NodeAddressBytes::from_bytes([4u8; NODE_ADDRESS_LENGTH]),
            node2_pk,
        );
-        let (_, node3_pk) = crypto::keygen();
+        let node3_pk = random_pubkey();
        let node3 = Node::new(
            NodeAddressBytes::from_bytes([2u8; NODE_ADDRESS_LENGTH]),
            node3_pk,
        );

-        let (_, node4_pk) = crypto::keygen();
+        let node4_pk = random_pubkey();
        let node4 = Node::new(
            NodeAddressBytes::from_bytes([2u8; NODE_ADDRESS_LENGTH]),
            node4_pk,
@@ -170,17 +175,17 @@ mod packet_encoding {
    }

    fn make_valid_sphinx_packet(size: PacketSize) -> NymPacket {
-        let (_, node1_pk) = crypto::keygen();
+        let node1_pk = random_pubkey();
        let node1 = Node::new(
            NodeAddressBytes::from_bytes([5u8; NODE_ADDRESS_LENGTH]),
            node1_pk,
        );
-        let (_, node2_pk) = crypto::keygen();
+        let node2_pk = random_pubkey();
        let node2 = Node::new(
            NodeAddressBytes::from_bytes([4u8; NODE_ADDRESS_LENGTH]),
            node2_pk,
        );
-        let (_, node3_pk) = crypto::keygen();
+        let node3_pk = random_pubkey();
        let node3 = Node::new(
            NodeAddressBytes::from_bytes([2u8; NODE_ADDRESS_LENGTH]),
            node3_pk,
@@ -4,8 +4,10 @@ use nym_sphinx_addressing::nodes::{NymNodeRoutingAddress, NymNodeRoutingAddressE
 use nym_sphinx_params::{PacketSize, PacketType};
 use nym_sphinx_types::{
    Delay as SphinxDelay, DestinationAddressBytes, NodeAddressBytes, NymPacket, NymPacketError,
-    NymProcessedPacket, OutfoxError, PrivateKey, ProcessedPacket, SphinxError,
+    NymProcessedPacket, OutfoxError, PrivateKey, ProcessedPacketData, SphinxError,
+    Version as SphinxPacketVersion,
 };
+use std::fmt::Display;
 use thiserror::Error;

 use crate::packet::FramedNymPacket;
@@ -13,12 +15,38 @@ use nym_metrics::nanos;
 use nym_sphinx_forwarding::packet::MixPacket;

 #[derive(Debug)]
-pub enum MixProcessingResult {
+pub enum MixProcessingResultData {
    /// Contains unwrapped data that should first get delayed before being sent to next hop.
-    ForwardHop(MixPacket, Option<SphinxDelay>),
+    ForwardHop {
+        packet: MixPacket,
+        delay: Option<SphinxDelay>,
+    },

    /// Contains all data extracted out of the final hop packet that could be forwarded to the destination.
-    FinalHop(ProcessedFinalHop),
+    FinalHop { final_hop_data: ProcessedFinalHop },
+}
+
+#[derive(Debug, Copy, Clone)]
+pub enum MixPacketVersion {
+    Outfox,
+    Sphinx(SphinxPacketVersion),
+}
+
+impl Display for MixPacketVersion {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        match self {
+            MixPacketVersion::Outfox => "outfox".fmt(f),
+            MixPacketVersion::Sphinx(sphinx_version) => {
+                write!(f, "sphinx-{}", sphinx_version.value())
+            }
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct MixProcessingResult {
+    pub packet_version: MixPacketVersion,
+    pub processing_data: MixProcessingResultData,
 }

 type ForwardAck = MixPacket;
@@ -107,37 +135,63 @@ fn perform_final_processing(
 ) -> Result<MixProcessingResult, PacketProcessingError> {
    match packet {
        NymProcessedPacket::Sphinx(packet) => {
-            match packet {
-                ProcessedPacket::ForwardHop(packet, address, delay) => {
-                    process_forward_hop(NymPacket::Sphinx(*packet), address, delay, packet_type)
-                }
+            let processing_data = match packet.data {
+                ProcessedPacketData::ForwardHop {
+                    next_hop_packet,
+                    next_hop_address,
+                    delay,
+                } => process_forward_hop(
+                    NymPacket::Sphinx(next_hop_packet),
+                    next_hop_address,
+                    delay,
+                    packet_type,
+                ),
                // right now there's no use for the surb_id included in the header - probably it should get removed from the
                // sphinx all together?
-                ProcessedPacket::FinalHop(destination, _, payload) => process_final_hop(
+                ProcessedPacketData::FinalHop {
+                    destination,
+                    identifier: _,
+                    payload,
+                } => process_final_hop(
                    destination,
                    payload.recover_plaintext()?,
                    packet_size,
                    packet_type,
                ),
-            }
+            }?;
+
+            Ok(MixProcessingResult {
+                packet_version: MixPacketVersion::Sphinx(packet.version),
+                processing_data,
+            })
        }
        NymProcessedPacket::Outfox(packet) => {
            let next_address = *packet.next_address();
            let packet = packet.into_packet();
            if packet.is_final_hop() {
-                process_final_hop(
+                let processing_data = process_final_hop(
                    DestinationAddressBytes::from_bytes(next_address),
                    packet.recover_plaintext()?.to_vec(),
                    packet_size,
                    packet_type,
-                )
+                )?;
+                Ok(MixProcessingResult {
+                    packet_version: MixPacketVersion::Outfox,
+                    processing_data,
+                })
            } else {
-                let mix_packet = MixPacket::new(
+                let packet = MixPacket::new(
                    NymNodeRoutingAddress::try_from_bytes(&next_address)?,
                    NymPacket::Outfox(packet),
                    PacketType::Outfox,
                );
-                Ok(MixProcessingResult::ForwardHop(mix_packet, None))
+                Ok(MixProcessingResult {
+                    packet_version: MixPacketVersion::Outfox,
+                    processing_data: MixProcessingResultData::ForwardHop {
+                        packet,
+                        delay: None,
+                    },
+                })
            }
        }
    }
@@ -148,14 +202,16 @@ fn process_final_hop(
    payload: Vec<u8>,
    packet_size: PacketSize,
    packet_type: PacketType,
-) -> Result<MixProcessingResult, PacketProcessingError> {
+) -> Result<MixProcessingResultData, PacketProcessingError> {
    let (forward_ack, message) = split_into_ack_and_message(payload, packet_size, packet_type)?;

-    Ok(MixProcessingResult::FinalHop(ProcessedFinalHop {
-        destination,
-        forward_ack,
-        message,
-    }))
+    Ok(MixProcessingResultData::FinalHop {
+        final_hop_data: ProcessedFinalHop {
+            destination,
+            forward_ack,
+            message,
+        },
+    })
 }

 fn split_into_ack_and_message(
@@ -211,11 +267,14 @@ fn process_forward_hop(
    forward_address: NodeAddressBytes,
    delay: SphinxDelay,
    packet_type: PacketType,
-) -> Result<MixProcessingResult, PacketProcessingError> {
+) -> Result<MixProcessingResultData, PacketProcessingError> {
    let next_hop_address = NymNodeRoutingAddress::try_from(forward_address)?;

-    let mix_packet = MixPacket::new(next_hop_address, packet, packet_type);
-    Ok(MixProcessingResult::ForwardHop(mix_packet, Some(delay)))
+    let packet = MixPacket::new(next_hop_address, packet, packet_type);
+    Ok(MixProcessingResultData::ForwardHop {
+        packet,
+        delay: Some(delay),
+    })
 }

 // TODO: what more could we realistically test here?
@@ -16,5 +16,5 @@ nym-sphinx-types = { path = "../types" }

 [features]
 default = ["sphinx"]
-sphinx = ["nym-crypto/sphinx", "nym-sphinx-types/outfox"]
-outfox = ["nym-crypto/outfox", "nym-sphinx-types/outfox"]
+sphinx = ["nym-sphinx-types/outfox"]
+outfox = ["nym-sphinx-types/outfox"]
@@ -1,14 +1,22 @@
 // Copyright 2021 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0

+use std::{array::TryFromSliceError, fmt};
+use thiserror::Error;
+
+#[cfg(feature = "outfox")]
+use nym_outfox::packet::{OutfoxPacket, OutfoxProcessedPacket};
+
+#[cfg(feature = "sphinx")]
+use sphinx_packet::{SphinxPacket, SphinxPacketBuilder};
+
 #[cfg(feature = "outfox")]
 pub use nym_outfox::{
    constants::MIN_PACKET_SIZE, constants::MIX_PARAMS_LEN, constants::OUTFOX_PACKET_OVERHEAD,
    error::OutfoxError,
 };
 // re-exporting types and constants available in sphinx
-#[cfg(feature = "outfox")]
-use nym_outfox::packet::{OutfoxPacket, OutfoxProcessedPacket};
+
 #[cfg(feature = "sphinx")]
 pub use sphinx_packet::{
    constants::{
@@ -21,12 +29,10 @@ pub use sphinx_packet::{
    payload::{Payload, PAYLOAD_OVERHEAD_SIZE},
    route::{Destination, DestinationAddressBytes, Node, NodeAddressBytes, SURBIdentifier},
    surb::{SURBMaterial, SURB},
-    Error as SphinxError, ProcessedPacket,
+    version::Version,
+    version::UPDATED_LEGACY_VERSION,
+    Error as SphinxError, ProcessedPacket, ProcessedPacketData,
 };
-#[cfg(feature = "sphinx")]
-use sphinx_packet::{SphinxPacket, SphinxPacketBuilder};
-use std::{array::TryFromSliceError, fmt};
-use thiserror::Error;

 #[derive(Error, Debug)]
 pub enum NymPacketError {
@@ -85,8 +91,12 @@ impl NymPacket {
        destination: &Destination,
        delays: &[Delay],
    ) -> Result<NymPacket, NymPacketError> {
+        // FIXME:
+        // for now explicitly use the legacy version until sufficient number of nodes
+        // understand both variants
        Ok(NymPacket::Sphinx(
            SphinxPacketBuilder::new()
+                .with_version(UPDATED_LEGACY_VERSION)
                .with_payload_size(size)
                .build_packet(message, route, destination, delays)?,
        ))
@@ -30,6 +30,10 @@ pub struct Config {
 }

 impl Config {
+    pub fn base(&self) -> BaseClientConfig {
+        self.base.clone()
+    }
+
    pub fn new<S: Into<String>>(id: S, version: S, provider_mix_address: S) -> Self {
        Config {
            base: BaseClientConfig::new(id, version),
@@ -76,6 +76,10 @@ where
    <S::GatewaysDetailsStore as GatewaysDetailsStore>::StorageError: Sync + Send,
    <S::KeyStore as KeyStore>::StorageError: Send + Sync,
 {
+    pub fn config(&self) -> Config {
+        self.config.clone()
+    }
+
    pub fn new(
        config: Config,
        storage: S,
@@ -233,7 +237,7 @@ where
        };

        let mut base_builder =
-            BaseClientBuilder::new(&self.config.base, self.storage, dkg_query_client)
+            BaseClientBuilder::new(self.config.base(), self.storage, dkg_query_client)
                .with_gateway_setup(self.setup_method)
                .with_user_agent(self.user_agent);

@@ -241,7 +245,7 @@ where
            base_builder = base_builder.with_stored_topology(custom_mixnet)?;
        }

-        let packet_type = self.config.base.debug.traffic.packet_type;
+        let packet_type = self.config.base().debug.traffic.packet_type;
        let mut started_client = base_builder.start_base().await?;
        let self_address = started_client.address;
        let client_input = started_client.client_input.register_producer();
@@ -252,7 +256,7 @@ where

        Self::start_socks5_listener(
            &self.config.socks5,
-            self.config.base.debug,
+            self.config.base().debug,
            client_input,
            client_output,
            client_state,
@@ -25,19 +25,28 @@ pub type ClientStatsReceiver = tokio::sync::mpsc::UnboundedReceiver<ClientStatsE
 #[derive(Clone)]
 pub struct ClientStatsSender {
    stats_tx: Option<UnboundedSender<ClientStatsEvents>>,
+    task_client: TaskClient,
 }

 impl ClientStatsSender {
    /// Create a new statistics Sender
-    pub fn new(stats_tx: Option<UnboundedSender<ClientStatsEvents>>) -> Self {
-        ClientStatsSender { stats_tx }
+    pub fn new(
+        stats_tx: Option<UnboundedSender<ClientStatsEvents>>,
+        task_client: TaskClient,
+    ) -> Self {
+        ClientStatsSender {
+            stats_tx,
+            task_client,
+        }
    }

    /// Report a statistics event using the sender.
    pub fn report(&self, event: ClientStatsEvents) {
        if let Some(tx) = &self.stats_tx {
            if let Err(err) = tx.send(event) {
-                log::error!("Failed to send stats event: {:?}", err);
+                if !self.task_client.is_shutdown_poll() {
+                    log::error!("Failed to send stats event: {err}");
+                }
            }
        }
    }
@@ -221,7 +221,7 @@ impl TaskManager {
        }
    }

-    pub(crate) async fn wait_for_graceful_shutdown(&mut self) {
+    pub async fn wait_for_graceful_shutdown(&mut self) {
        if let Some(notify_rx) = self.notify_rx.take() {
            drop(notify_rx);
        }
@@ -299,6 +299,8 @@ impl Clone for TaskClient {
            None
        };

+        log::debug!("Cloned task client: {name:?}");
+
        TaskClient {
            name,
            shutdown: AtomicBool::new(self.shutdown.load(Ordering::Relaxed)),
@@ -315,7 +317,7 @@ impl TaskClient {
    const MAX_NAME_LENGTH: usize = 128;
    const OVERFLOW_NAME: &'static str = "reached maximum TaskClient children name depth";

-    const SHUTDOWN_TIMEOUT_WAITING_FOR_SIGNAL_ON_EXIT: Duration = Duration::from_secs(5);
+    const SHUTDOWN_TIMEOUT_WAITING_FOR_SIGNAL_ON_EXIT: Duration = Duration::from_secs(10);

    fn new(
        notify: watch::Receiver<()>,
@@ -344,6 +346,7 @@ impl TaskClient {
            format!("unknown-{suffix}")
        };

+        log::debug!("Forked task client: {child_name}");
        child.name = Some(child_name);
        child
    }
@@ -377,6 +380,7 @@ impl TaskClient {
        } else {
            format!("unknown-{suffix}")
        };
+        log::debug!("Renamed task client: {name}");
        self.named(name)
    }

@@ -27,7 +27,7 @@ wasm-bindgen = { workspace = true, optional = true }

 ## internal
 nym-config = { path = "../config" }
-nym-crypto = { path = "../crypto", features = ["sphinx", "outfox"] }
+nym-crypto = { path = "../crypto" }
 nym-mixnet-contract-common = { path = "../cosmwasm-smart-contracts/mixnet-contract" }
 nym-sphinx-addressing = { path = "../nymsphinx/addressing" }
 nym-sphinx-types = { path = "../nymsphinx/types", features = [
@@ -11,7 +11,7 @@ use std::borrow::Borrow;
 use std::collections::{HashMap, HashSet};
 use std::fmt::Display;
 use std::net::IpAddr;
-use tracing::{debug, warn};
+use tracing::{debug, trace, warn};

 pub use crate::node::{EntryDetails, RoutingNode, SupportedRoles};
 pub use error::NymTopologyError;
@@ -293,7 +293,7 @@ impl NymTopology {
        let has_exit_gateways = !self.rewarded_set.exit_gateways.is_empty();
        let has_entry_gateways = !self.rewarded_set.entry_gateways.is_empty();

-        debug!(
+        trace!(
            has_layer1 = %has_layer1,
            has_layer2 = %has_layer2,
            has_layer3 = %has_layer3,
@@ -105,7 +105,7 @@ impl<'a> From<&'a RoutingNode> for SphinxNode {
            .try_into()
            .unwrap();

-        SphinxNode::new(node_address_bytes, (&node.sphinx_key).into())
+        SphinxNode::new(node_address_bytes, node.sphinx_key.into())
    }
 }

@@ -5,6 +5,7 @@
 #![allow(clippy::drop_non_drop)]

 use crate::error::WasmCoreError;
+use nym_client_core::config::ForgetMe;
 use nym_config::helpers::OptionalSet;
 use nym_sphinx::params::{PacketSize, PacketType};
 use serde::{Deserialize, Serialize};
@@ -110,6 +111,8 @@ pub struct DebugWasm {
    /// Defines all configuration options related to stats reporting.
    #[wasm_bindgen(getter_with_clone)]
    pub stats_reporting: StatsReportingWasm,
+
+    pub forget_me: ForgetMeWasm,
 }

 impl Default for DebugWasm {
@@ -128,6 +131,7 @@ impl From<DebugWasm> for ConfigDebug {
            topology: debug.topology.into(),
            reply_surbs: debug.reply_surbs.into(),
            stats_reporting: debug.stats_reporting.into(),
+            forget_me: debug.forget_me.into(),
        }
    }
 }
@@ -142,6 +146,7 @@ impl From<ConfigDebug> for DebugWasm {
            topology: debug.topology.into(),
            reply_surbs: debug.reply_surbs.into(),
            stats_reporting: debug.stats_reporting.into(),
+            forget_me: ForgetMeWasm::from(debug.forget_me),
        }
    }
 }
@@ -395,6 +400,10 @@ pub struct TopologyWasm {
    /// Specifies whether this client should ignore the current epoch role of the target egress node
    /// when constructing the final hop packets.
    pub ignore_egress_epoch_role: bool,
+
+    /// Specifies whether this client should ignore the current epoch role of the ingress node
+    /// when attempting to establish new connection
+    pub ignore_ingress_epoch_role: bool,
 }

 impl Default for TopologyWasm {
@@ -419,6 +428,7 @@ impl From<TopologyWasm> for ConfigTopology {
            minimum_gateway_performance: topology.minimum_gateway_performance,
            use_extended_topology: topology.use_extended_topology,
            ignore_egress_epoch_role: topology.ignore_egress_epoch_role,
+            ignore_ingress_epoch_role: topology.ignore_ingress_epoch_role,
        }
    }
 }
@@ -436,6 +446,7 @@ impl From<ConfigTopology> for TopologyWasm {
            minimum_gateway_performance: topology.minimum_gateway_performance,
            use_extended_topology: topology.use_extended_topology,
            ignore_egress_epoch_role: topology.ignore_egress_epoch_role,
+            ignore_ingress_epoch_role: topology.ignore_ingress_epoch_role,
        }
    }
 }
@@ -535,6 +546,29 @@ impl From<ConfigReplySurbs> for ReplySurbsWasm {
    }
 }

+#[wasm_bindgen(inspectable)]
+#[derive(Debug, Clone, Deserialize, PartialEq, Serialize, Copy, Default)]
+#[serde(deny_unknown_fields)]
+pub struct ForgetMeWasm {
+    pub client: bool,
+    pub stats: bool,
+}
+
+impl From<ForgetMeWasm> for ForgetMe {
+    fn from(value: ForgetMeWasm) -> Self {
+        ForgetMe::new(value.client, value.stats)
+    }
+}
+
+impl From<ForgetMe> for ForgetMeWasm {
+    fn from(value: ForgetMe) -> Self {
+        Self {
+            client: value.client(),
+            stats: value.stats(),
+        }
+    }
+}
+
 #[wasm_bindgen(inspectable)]
 #[derive(Debug, Clone, Deserialize, PartialEq, Serialize)]
 #[serde(deny_unknown_fields)]
@@ -8,8 +8,8 @@
 #![allow(clippy::empty_docs)]

 use super::{
-    AcknowledgementsWasm, CoverTrafficWasm, DebugWasm, GatewayConnectionWasm, ReplySurbsWasm,
-    StatsReportingWasm, TopologyWasm, TrafficWasm,
+    AcknowledgementsWasm, CoverTrafficWasm, DebugWasm, ForgetMeWasm, GatewayConnectionWasm,
+    ReplySurbsWasm, StatsReportingWasm, TopologyWasm, TrafficWasm,
 };
 use crate::config::ConfigDebug;
 use serde::{Deserialize, Serialize};
@@ -47,6 +47,9 @@ pub struct DebugWasmOverride {
    /// Defines all configuration options related to stats reporting.
    #[tsify(optional)]
    pub stats_reporting: Option<StatsReportingWasmOverride>,
+
+    #[tsify(optional)]
+    pub forget_me: Option<ForgetMeWasmOverride>,
 }

 impl From<DebugWasmOverride> for DebugWasm {
@@ -59,6 +62,7 @@ impl From<DebugWasmOverride> for DebugWasm {
            topology: value.topology.map(Into::into).unwrap_or_default(),
            reply_surbs: value.reply_surbs.map(Into::into).unwrap_or_default(),
            stats_reporting: value.stats_reporting.map(Into::into).unwrap_or_default(),
+            forget_me: value.forget_me.map(Into::into).unwrap_or_default(),
        }
    }
 }
@@ -281,6 +285,11 @@ pub struct TopologyWasmOverride {
    /// when constructing the final hop packets.
    #[tsify(optional)]
    pub ignore_egress_epoch_role: Option<bool>,
+
+    /// Specifies whether this client should ignore the current epoch role of the ingress node
+    /// when attempting to establish new connection
+    #[tsify(optional)]
+    pub ignore_ingress_epoch_role: Option<bool>,
 }

 impl From<TopologyWasmOverride> for TopologyWasm {
@@ -310,6 +319,9 @@ impl From<TopologyWasmOverride> for TopologyWasm {
            ignore_egress_epoch_role: value
                .ignore_egress_epoch_role
                .unwrap_or(def.ignore_egress_epoch_role),
+            ignore_ingress_epoch_role: value
+                .ignore_ingress_epoch_role
+                .unwrap_or(def.ignore_ingress_epoch_role),
        }
    }
 }
@@ -400,6 +412,26 @@ impl From<ReplySurbsWasmOverride> for ReplySurbsWasm {
    }
 }

+#[derive(Tsify, Debug, Clone, Serialize, Deserialize)]
+#[tsify(into_wasm_abi, from_wasm_abi)]
+#[serde(rename_all = "camelCase")]
+pub struct ForgetMeWasmOverride {
+    #[tsify(optional)]
+    pub client: Option<bool>,
+
+    #[tsify(optional)]
+    pub stats: Option<bool>,
+}
+
+impl From<ForgetMeWasmOverride> for ForgetMeWasm {
+    fn from(value: ForgetMeWasmOverride) -> Self {
+        ForgetMeWasm {
+            client: value.client.unwrap_or_default(),
+            stats: value.stats.unwrap_or_default(),
+        }
+    }
+}
+
 #[derive(Tsify, Debug, Clone, Serialize, Deserialize)]
 #[tsify(into_wasm_abi, from_wasm_abi)]
 #[serde(rename_all = "camelCase")]
@@ -132,9 +132,17 @@ pub async fn setup_gateway_from_api(
    chosen_gateway: Option<IdentityKey>,
    nym_apis: &[Url],
    minimum_performance: u8,
+    ignore_epoch_roles: bool,
 ) -> Result<InitialisationResult, WasmCoreError> {
    let mut rng = thread_rng();
-    let gateways = gateways_for_init(&mut rng, nym_apis, None, minimum_performance).await?;
+    let gateways = gateways_for_init(
+        &mut rng,
+        nym_apis,
+        None,
+        minimum_performance,
+        ignore_epoch_roles,
+    )
+    .await?;
    setup_gateway_wasm(client_store, force_tls, chosen_gateway, gateways).await
 }

@@ -142,9 +150,17 @@ pub async fn current_gateways_wasm(
    nym_apis: &[Url],
    user_agent: Option<UserAgent>,
    minimum_performance: u8,
+    ignore_epoch_roles: bool,
 ) -> Result<Vec<RoutingNode>, ClientCoreError> {
    let mut rng = thread_rng();
-    gateways_for_init(&mut rng, nym_apis, user_agent, minimum_performance).await
+    gateways_for_init(
+        &mut rng,
+        nym_apis,
+        user_agent,
+        minimum_performance,
+        ignore_epoch_roles,
+    )
+    .await
 }

 pub async fn setup_from_topology(
@@ -163,6 +179,7 @@ pub async fn generate_new_client_keys(store: &ClientStorage) -> Result<(), WasmC
    Ok(())
 }

+#[allow(clippy::too_many_arguments)]
 pub async fn add_gateway(
    preferred_gateway: Option<IdentityKey>,
    latency_based_selection: Option<bool>,
@@ -170,6 +187,7 @@ pub async fn add_gateway(
    nym_apis: &[Url],
    user_agent: UserAgent,
    min_performance: u8,
+    ignore_epoch_roles: bool,
    storage: &ClientStorage,
 ) -> Result<(), WasmCoreError> {
    let selection_spec = GatewaySelectionSpecification::new(
@@ -203,8 +221,13 @@ pub async fn add_gateway(

    // Setup gateway by either registering a new one, or creating a new config from the selected
    // one but with keys kept, or reusing the gateway configuration.
-    let available_gateways =
-        current_gateways_wasm(nym_apis, Some(user_agent), min_performance).await?;
+    let available_gateways = current_gateways_wasm(
+        nym_apis,
+        Some(user_agent),
+        min_performance,
+        ignore_epoch_roles,
+    )
+    .await?;

    // since we're registering with a brand new gateway,
    // make sure the list of available gateways doesn't overlap the list of known gateways
--- a/Show More
+++ b/Show More